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Zhao H, Lu D, Wang X, Ye X, Zhang J, Pi M, Pan Z, Chin YY, Chen CT, Hu Z, Long Y. High-Pressure Synthesis of Semiconducting PbCu 3Mn 4O 12 with Near-Room-Temperature Ferrimagnetic Order. Inorg Chem 2024; 63:5924-5930. [PMID: 38511934 DOI: 10.1021/acs.inorgchem.3c04493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
A transition-metal oxide of PbCu3Mn4O12 was prepared at 1523 K and 10 GPa. An A-site-ordered quadruple perovskite structure with the space group Im3̅ is assigned for this compound. Based on bond-valence-sum calculations and X-ray absorption spectroscopy, the charge combination is determined to be PbCu32+Mn44+O12. Due to Cu2+(↑)-Mn4+(↓) antiferromagnetic coupling, a near-room-temperature ferrimagnetic phase transition is observed at approximately 287 K. PbCu3Mn4O12 exhibits a semiconducting electric transport property with the energy band gap Eg ≈ 0.2 eV. In addition, considerable low-field magnetoresistance effects are observed at lower temperatures. This study provides an intrinsic near-room-temperature ferrimagnetic semiconductor that exhibits potential applications in next-generation spintronic devices.
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Affiliation(s)
- Haoting Zhao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- College of Materials Science and Opto-Electronic Technology, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Dabiao Lu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiao Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xubin Ye
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Jie Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Maocai Pi
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhao Pan
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Yi-Ying Chin
- Department of Physics, National Chung Cheng University, Chiayi 621301, Taiwan
| | - Chien-Te Chen
- National Synchrotron Radiation Research Center (NSRRC), 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 300092, Taiwan
| | - Zhiwei Hu
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, Dresden 01187, Germany
| | - Youwen Long
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
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2
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Patil H, Rehman S, Kim H, Kadam KD, Khan MA, Khan K, Aziz J, Ismail M, Khan MF, Kim DK. Effect of growth temperature on self-rectifying BaTiO 3/ZnO heterojunction for high-density crossbar arrays and neuromorphic computing. J Colloid Interface Sci 2023; 652:836-844. [PMID: 37625358 DOI: 10.1016/j.jcis.2023.08.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 08/11/2023] [Accepted: 08/16/2023] [Indexed: 08/27/2023]
Abstract
In the quest for high-density integration and massive scalability, ferroelectric-based devices provide an achievable approach for nonvolatile crossbar array (CBA) architecture and neuromorphic computing. In this report, ferroelectric-semiconductor (Pt/BaTiO3/ZnO/Au) heterojunction-based devices are demonstrated to exhibit nonvolatile and synaptic characteristics. In this study, the ferroelectric (BaTiO3) layer was modulated at various growth temperatures of 350 °C, 450 °C, 550 °C and 650 °C. Growing temperature in the ferroelectric layer has a significant impact on resistive switching. The ferroelectricity of the BaTiO3 thin film enhanced by increasing temperature causes a substantial shift in the interface state density at heterojunction interface, which is crucial for self-rectification. Furthermore, this self-rectifying property advances to reduce the crosstalk problem without any selector device. Enhanced resistive switching and neuromorphic applications have been demonstrated using BaTiO3 heterostructure devices at 550 °C. The dynamic ferroelectric polarization switching in this heterojunction demonstrated linear conductance change in artificial synapses with 91 % recognition accuracy. Ferroelectric polarization reversal with a depletion region at the heterojunction interface is the responsible mechanism for the switching in these devices. Thus, these findings pave the way for designing low power high-density crossbar arrays and neuromorphic application based on ferroelectric-semiconductor heterostructures.
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Affiliation(s)
- Harshada Patil
- Department of Electrical Engineering, Sejong University, Seoul 05006, Republic of Korea; Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea
| | - Shania Rehman
- Department of Semiconductor Systems Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Honggyun Kim
- Department of Semiconductor Systems Engineering, Sejong University, Seoul 05006, Republic of Korea
| | - Kalyani D Kadam
- Department of Electrical Engineering, Sejong University, Seoul 05006, Republic of Korea; Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea
| | - Muhammad Asghar Khan
- Department of Physics and Graphene Research Institute, Sejong University, Seoul 05006, Republic of Korea
| | - Karim Khan
- School of Electrical Engineering & Intelligentization, Dongguan University of Technology, Dongguan 523808, China
| | - Jamal Aziz
- Department of Electrical Engineering, Sejong University, Seoul 05006, Republic of Korea; Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea
| | - Muhammad Ismail
- Division of Electronics and Electrical Engineering, Dongguk University, Seoul 04620, Republic of Korea
| | - Muhammad Farooq Khan
- Department of Electrical Engineering, Sejong University, Seoul 05006, Republic of Korea.
| | - Deok-Kee Kim
- Department of Electrical Engineering, Sejong University, Seoul 05006, Republic of Korea; Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea; Department of Semiconductor Systems Engineering, Sejong University, Seoul 05006, Republic of Korea.
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3
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Wang Q, Tian Y, Yao M, Fu J, Wang L, Zhu Y. Bimetallic Organic Frameworks of High Piezovoltage for Sono-Piezo Dynamic Therapy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2301784. [PMID: 37432882 DOI: 10.1002/adma.202301784] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 06/21/2023] [Accepted: 07/10/2023] [Indexed: 07/13/2023]
Abstract
Piezoelectric materials produce charges to directly act on cancer medium or promote the generation of reactive oxygen species (ROS) for novel tumor therapy triggered by sonography. Currently, piezoelectric sonosensitizers are mainly used to catalyze ROS generation by the band-tilting effect for sonodynamic therapy. However, it remains a challenge for piezoelectric sonosensitizers to produce high piezovoltages to overcome the bandgap barrier for direct charge generation. Herein, Mn-Ti bimetallic organic framework tetragonal nanosheets (MT-MOF TNS) are designed to produce high piezovoltages for novel sono-piezo (SP)-dynamic therapy (SPDT) with remarkable antitumor efficacy in vitro and in vivo. The MT-MOF TNS comprise non-centrosymmetric secondary building units of Mn-Ti-oxo cyclic octamers with charge heterogeneous components for piezoelectricity. The MT-MOF TNS promotes strong sonocavitation to induce piezoelectric effect with a high SP voltage (2.9 V) in situ, to directly excite charges, which is validated by SP-excited luminescence spectrometry. The SP voltage and charges depolarize the mitochondrial and plasma membrane potentials and cause ROS overproduction and serious tumor cell damage. Importantly, MT-MOF TNS can be decorated with targeting molecules and chemotherapeutics for more severe tumor regression by combining SPDT with chemodynamic therapy and chemotherapy. This report develops a fascinating MT-MOF piezoelectric nano-semiconductor and provides an efficient SPDT strategy for tumor treatment.
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Affiliation(s)
- Qiqi Wang
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
- Center of Materials Science and Optoelectronics Engineer, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yue Tian
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
- Center of Materials Science and Optoelectronics Engineer, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Meng Yao
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
- Center of Materials Science and Optoelectronics Engineer, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jingke Fu
- Shanghai Key Laboratory of Orthopaedic Implant, Department of Orthopaedic Surgery, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China
| | - Lianzhou Wang
- Nanomaterials Centre, School of Chemical Engineering, and Australian Institute of Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Yingchun Zhu
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, China
- Center of Materials Science and Optoelectronics Engineer, University of Chinese Academy of Sciences, Beijing, 100049, China
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Jana I, Hait S, Mandal K. Improvement of leakage, magnetic and magnetodielectric properties in cobalt doped gallium ferrite. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 35:485702. [PMID: 37667991 DOI: 10.1088/1361-648x/acf35c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 08/23/2023] [Indexed: 09/06/2023]
Abstract
Gallium ferrite (GFO) is a magnetoelectric (ME) material, capturing growing attention due to its strong ME coupling at room temperature. However, the application of the material in practical use is hindered due to its high leakage. In this work, the effects of cobalt (Co) substitution at the iron (Fe) sites of GaFe1-xCoxO3(0.0 ⩽x⩽ 0.1) polycrystals on the structure, electric and magnetic properties are investigated in detail. 5 at. wt.% substitution (x= 0.05) with cobalt ions achieves a reduction in leakage current density by four orders of magnitude due to reduced hopping between Fe3+and Fe2+ions and suppression of the oxygen vacancy formation. This is supported by higher dielectric constant and lower dielectric loss, as well as a significant difference between grain and grain boundary resistances. Two-phase-like magnetic behavior in magnetic hysteresis loop with enhanced magnetization and two magnetic transition temperatures are observed in the doped samples. All samples exhibited an increase in the magnetodielectric factor, indicating enhanced coupling between magnetic and electrical parameters. By concurrently increasing dielectric, magnetic, and coupling between them, this study describes a viable technique for lowering the most significant impediment to GFO's usage as a ME device.
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Affiliation(s)
- Ishita Jana
- S. N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake City, Kolkata 700106, India
| | - Swarnali Hait
- S. N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake City, Kolkata 700106, India
| | - Kalyan Mandal
- S. N. Bose National Centre for Basic Sciences, JD Block, Sector III, Salt Lake City, Kolkata 700106, India
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5
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Jain A, Nabeel AN, Bhagwat S, Kumar R, Sharma S, Kozak D, Hunjet A, Kumar A, Singh R. Fabrication of polypyrrole gas sensor for detection of NH 3 using an oxidizing agent and pyrrole combinations: Studies and characterizations. Heliyon 2023; 9:e17611. [PMID: 37455973 PMCID: PMC10338976 DOI: 10.1016/j.heliyon.2023.e17611] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 05/27/2023] [Accepted: 06/22/2023] [Indexed: 07/18/2023] Open
Abstract
The organic polymer known as Polypyrrole (Ppy) is synthesized when pyrrole monomers are polymerized. Excellent thermal stability, superior electrical conductivity, and environmental stability are all characteristics of Polypyrrole. Chemical oxidative polymerization was used to synthesize Ppy using Ferric chloride (FeCl3) as an oxidizing agent and surfactant CTAB in aqueous solution. Oxidant (FeCl3) to pyrrole varied in different molar ratios (2, 3, 4 and 5). It was found that increasing this ratio up to 4 increases PPy's conductivity. XRD, FTIR, and SEM were used to characterize Ppy. The conductive nature of Ppy was studied by I-V characteristics. The best conductive polymer is studied for the NH3 gas response.
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Affiliation(s)
- Alok Jain
- School of Physical Sciences, Lovely Professional University, Phagwara-144411, India
| | - Ansari Novman Nabeel
- Research Scholar, School of Physical Sciences, Lovely Professional University, Phagwara-144411, India
| | - Sunita Bhagwat
- Department of Physics, Abasaheb Garware College, Savitribai Phule University, Pune-411004, India
| | - Rajeev Kumar
- School of Mechanical Engineering, Lovely Professional University, Phagwara-144411, India
| | - Shubham Sharma
- Deptt. of Mechanical Engg., University Centre for Research and Development (UCRD), Chandigarh University, Mohali, India
- School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao, 266520, China
- Department of Manufacturing Engineering and Materials Science, Faculty of Mechanical Engineering, Opole University of Technology, Opole, Poland
| | - Drazan Kozak
- University of Slavonski Brod, Mechanical Engineering Faculty in Slavonski Brod, Trg Ivane Brlić-Mažuranić 2, HR-35000 Slavonski Brod, Croatia
| | - Anica Hunjet
- University Center Varaždin, University North 104. Brigade 3, HR-42 000 Varaždin, Croatia
| | - Abhinav Kumar
- Department of Nuclear and Renewable Energy, Ural Federal University Named After the First President of Russia, Boris Yeltsin, 19 Mira Street, 620002 Ekaterinburg, Russia
| | - Rajesh Singh
- Uttaranchal Institute of Technology, Uttaranchal University, Dehradun 248007, India
- Department of Project Management, Universidad Internacional Iberoamericana, Campeche C.P. 24560, Mexico
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6
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Tahir FT, Husain M, Sfina N, Rached AA, Khan M, Rahman N. Probing the physical properties for prospective high energy applications of QMnF 3 (Q = Ga, In) halide perovskites compounds employing the framework of density functional theory. RSC Adv 2023; 13:18788-18798. [PMID: 37346958 PMCID: PMC10281494 DOI: 10.1039/d3ra02878j] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 06/14/2023] [Indexed: 06/23/2023] Open
Abstract
We use WIEN2K to conduct density functional theory computations to explore the structural, thermodynamic, optoelectronic, and mechanical properties of fluoroperovskites QMnF3 (Q = Ga, In). The application of the Birch-Murnaghan equation to the energy versus volume, formation energy, and tolerance factor confirms the structural stability of these two QMnF3 (Q = Ga, In) materials. The thermodynamic stability of the compounds is confirmed by the results of the phonon calculation, while the mechanical stability is confirmed from the values of the elastic constants. GaMnF3 demonstrates a high capacity to withstand both compressive and shear stresses. A lower bulk modulus is responsible for the weaker ability of InMnF3 to endure changes in volume. Compared to GaMnF3, InMnF3 possesses rigidity having greater shear modulus, indicating greater resistance to changes in shape. However, both compounds are characterized as mechanically brittle, anisotropic, and ductile. The band structure that was determined indicates that both GaMnF3 and InMnF3 exhibit a metallic character. The density of states analysis further supports the metallic nature of GaMnF3 and InMnF3. In GaMnF3, the "Mn" and "F" atoms in the valence band significantly participate in the total density of states, whereas in InMnF3, both "Mn" and "F" atoms also dominate the total density of states. The values of ε1(0) computed for GaMnF3 and InMnF3 are positive i.e. > 0, and agree with Penn's model. We calculate the optical properties for both GaMnF3 and InMnF3 and the potential of these materials of interest for applications in optoelectronic gadgets including light-emitting diodes is attributed to their absorption in the ultraviolet-visible zone. We believe that this work may provide comprehensive insight, encouraging further exploration of experimental studies.
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Affiliation(s)
| | - Mudasser Husain
- Department of Physics, University of Lakki Marwat 28420 Lakki Marwat KPK Pakistan
| | - Nourreddine Sfina
- College of Sciences and Arts in Mahayel Asir, Department of Physics, King Khalid University Abha Saudi Arabia
| | - Ahmed Azzouz Rached
- Magnetic Materials Laboratory, Faculty of Exact Sciences, Djillali Liabes University of Sidi Bel-Abbes Algeria
| | - Majid Khan
- Department of Physics, Abdul Wali Khan University Mardan KPK Pakistan
| | - Nasir Rahman
- Department of Physics, University of Lakki Marwat 28420 Lakki Marwat KPK Pakistan
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7
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Sun H, Deng K, Kan E, Du Y. Second-order Jahn-Teller effect induced high-temperature ferroelectricity in two-dimensional NbO 2X (X = I, Br). NANOSCALE ADVANCES 2023; 5:2979-2985. [PMID: 37260497 PMCID: PMC10228335 DOI: 10.1039/d3na00245d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 04/28/2023] [Indexed: 06/02/2023]
Abstract
Based on the first-principles calculations, we investigated the ferroelectric properties of two-dimensional (2D) materials NbO2X (X = I, Br). Our cleavage energy analysis shows that exfoliating one NbO2I monolayer from its existing bulk counterpart is feasible. The phonon spectrum and molecular dynamics simulations confirm the dynamic and thermal stability of the monolayer structures for both NbO2I and NbO2Br. Total energy calculations show that the ferroelectric phase is the ground state for both materials, with the calculated in-plane ferroelectric polarizations being 384.5 pC m-1 and 375.2 pC m-1 for monolayers NbO2I and NbO2Br, respectively. Moreover, the intrinsic Curie temperature TC of monolayer NbO2I (NbO2Br) is as high as 1700 K (1500 K) from Monte Carlo simulation. Furthermore, with the orbital selective external potential method, the origin of ferroelectricity in NbO2X is revealed as the second-order Jahn-Teller effect. Our findings suggest that monolayers NbO2I and NbO2Br are promising candidate materials for practical ferroelectric applications.
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Affiliation(s)
- Huasheng Sun
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, and Department of Applied Physics, Nanjing University of Science and Technology Nanjing 210094 People's Republic of China
| | - Kaiming Deng
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, and Department of Applied Physics, Nanjing University of Science and Technology Nanjing 210094 People's Republic of China
| | - Erjun Kan
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, and Department of Applied Physics, Nanjing University of Science and Technology Nanjing 210094 People's Republic of China
| | - Yongping Du
- MIIT Key Laboratory of Semiconductor Microstructure and Quantum Sensing, and Department of Applied Physics, Nanjing University of Science and Technology Nanjing 210094 People's Republic of China
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8
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Heryanto H, Siswanto S, Rahmat R, Sulieman A, Bradley DA, Tahir D. Nickel Slag/Laterite Soil and Nickel Slag/Iron Sand Nanocomposites: Structural, Optical, and Electromagnetic Absorption Properties. ACS OMEGA 2023; 8:18591-18602. [PMID: 37273611 PMCID: PMC10233663 DOI: 10.1021/acsomega.3c00423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 04/18/2023] [Indexed: 06/06/2023]
Abstract
Efforts to produce microwave absorber materials that are inexpensive and environmentally friendly have become a means of greening the environment. The breakthrough can be focused on industrial waste and natural materials for functional purposes and how to enhance their performance. We successfully synthesized nickel slag/laterite soil (NS/LS) and nickel slag/iron sand (NS/IS) nanocomposites using a simple mechanical alloying technique, and the electromagnetic (EM) wave absorption capacities of the nanocomposites were measured using a vector network analyzer. The structural properties of the nanocomposites were analyzed by X-ray diffraction spectroscopy, where the results of the analysis showed that NS/IS has the largest crystallite size (15.69 nm) and the highest EM wave absorption performance. The optical properties of the nanocomposites were determined from their Fourier transform infrared spectra using the Kramers-Kronig relation. As determined through a quantitative analysis of the optical properties, the distance between the longitudinal and transversal optical phonon wavenumber positions (Δ(LO - TO) = 65 cm-1) is inversely proportional to the reflection loss. The surface morphologies of the nanocomposites were analyzed by scanning electron microscopy, and the particle diameters were observed by binary image and Gaussian distribution analyses. The nanocomposite surface exhibits a graded-like morphology, which indicates multiple reflections of the EM radiation, consequently reducing the EM interference. The best nanocomposite for an attenuated EM wave achieved a reflection loss of -39.14 dB at 5-8 GHz. A low penetration depth has implications for the electrical charge tuning of the storage and composite magnets. Finally, the EM absorption properties of NS/IS and NS/LS indicate a 2-mm-thick environmentally friendly nanocomposite for EM absorption.
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Affiliation(s)
- Heryanto Heryanto
- Department
of Physics, Hasanuddin University, Makassar 90245, Indonesia
| | - Siswanto Siswanto
- Department
of Statistics, Hasanuddin University, Makassar 90245, Indonesia
| | - Roni Rahmat
- Department
of Physics, Hasanuddin University, Makassar 90245, Indonesia
| | - Abdelmoneim Sulieman
- Department
of Radiology and Medical Imaging Sciences, College of Applied Medical
Sciences, Prince Sattam bin Abdulaziz University, P.O. Box 422, Alkharj 11942, Saudi Arabia
| | - David A. Bradley
- Centre
for Nuclear and Radiation Physics, Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
- Centre
for Applied Physics and Radiation Technologies, School of Engineering
and Technology, Sunway University, 47500 Bandar Sunway, Selangor, Malaysia
| | - Dahlang Tahir
- Department
of Physics, Hasanuddin University, Makassar 90245, Indonesia
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9
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Dwivedi SP, Sharma S, Sharma KP, Kumar A, Agrawal A, Singh R, Eldin SM. The Microstructure and Properties of Ni-Si-La 2O 3 Coatings Deposited on 304 Stainless Steel by Microwave Cladding. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2209. [PMID: 36984089 PMCID: PMC10052928 DOI: 10.3390/ma16062209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 03/01/2023] [Accepted: 03/02/2023] [Indexed: 06/18/2023]
Abstract
In this investigation, microwave radiation was used alongside a combination of Ni powder, Si powder, and La2O3 (Lanthanum oxide) powder to create surface cladding on SS-304 steel. To complete the microwave cladding process, 900 W at 2.45 GHz was used for 120 s. "Response surface methodology (RSM)" was utilized to attain the optimal combination of microwave cladding process parameters. The surface hardness of the cladding samples was taken as a response. The optimal combination of microwave cladding process parameters was found to be Si (wt.%) of 19.28, a skin depth of 4.57 µm, irradiation time of 118 s, and La2O3 (wt.%) of 11 to achieve a surface hardness of 287.25 HV. Experimental surface hardness at the corresponding microwave-cladding-process parameters was found to be 279 HV. The hardness of SS-304 was improved by about 32.85% at the optimum combination of microwave cladding process parameters. The SEM and optical microscopic images showed the presence of Si, Ni, and La2O3 particles. SEM images of the "cladding layer and surface" showed the "uniform cladding layer" with "fewer dark pixels" (yielding higher homogeneity). Higher homogeneity reduced the dimensional deviation in the developed cladding surface. XRD of the cladded surface showed the presence of FeNi, Ni2Si, FeNi3, NiSi2, Ni3C, NiC, and La2O3 phases. The "wear rate and coefficient of friction" of the developed cladded surface with 69.72% Ni, 19.28% Si, and 11% La2O3 particles were found to be 0.00367 mm3/m and 0.312, respectively. "Few dark spots" were observed on the "corroded surface". These "dark spots" displayed "some corrosion (corrosion weight loss 0.49 mg)" in a "3.5 wt.% NaCl environment".
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Affiliation(s)
| | - Shubham Sharma
- Mechanical Engineering Department, University Centre for Research and Development, Chandigarh University, Mohali 140413, India
- School of Mechanical and Automotive Engineering, Qingdao University of Technology, Qingdao 266520, China
| | - Kanta Prasad Sharma
- Institute of Engineering & Technology, GLA University, Mathura 281406, India
| | - Abhinav Kumar
- Department of Nuclear and Renewable Energy, Ural Federal University Named after the First President of Russia, Boris Yeltsin, 19 Mira Street, 620002 Ekaterinburg, Russia
| | - Ashish Agrawal
- Department of Mechanical and Industrial Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, Udupi 576104, India
| | - Rajesh Singh
- Uttaranchal Institute of Technology, Uttaranchal University, Dehradun 248007, India
- Department of Project Management, Universidad Internacional Iberoamericana, Campeche 24560, Mexico
| | - Sayed M. Eldin
- Center of Research, Faculty of Engineering, Future University in Egypt, New Cairo 11835, Egypt
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10
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Khalif M, Daneshmehr S, Arshadi S, Söğütlü İ, Mahmood EA, Abbasi V, Vessally E. Adsorption of O 2 molecule on the transition metals (TM(II) = Sc 2+, Ti 2+, V 2+, Cr 2+, Mn 2+, Fe 2+, Co 2+, Ni 2+, Cu 2+ and Zn 2+) porphyrins induced carbon nanocone (TM (II)PCNC). J Mol Graph Model 2023; 119:108362. [PMID: 36463004 DOI: 10.1016/j.jmgm.2022.108362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 12/05/2022]
Abstract
In this work, the adsorption of the O2 molecule on the transition metals (TM(II) = Sc2+, Ti2+, V2+, Cr2+, Mn2+, Fe2+, Co2+, Ni2+, Cu2+ and Zn2+) porphyrins induced carbon nanocone (TM(II)-PCNC) were investigated using density functional theory (DFT) in terms of stabilities, energetic, structural, and electronic properties. It has been found that the O2 molecule is adsorbed on the TM(II)-PCNC with adsorption energies in the range of 0.29 to -98.32 kcal/mol. The interaction between the O2 gas and the Sc-PCNC molecule from the outer site is the strongest. The interaction of the O2 gas over the Ni-PCNC molecule from both outer and inner sites is the weakest. It can be concluded that the suitable interaction energy (Eg) for sensing ability attributed to the Zn-PCNC because an effective and physical interaction between Zn-PCNC and the O2 gas leads to short recovery time. DFT calculations also clarified that the high %ΔEg of Zn-PCNC and hence the high sensitivity to the O2 gas confirm that the Zn-PCNC molecule is a promising candidate for having a good sensing ability to the O2 gas.
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Affiliation(s)
- Mohamood Khalif
- Medical Laboratory Techniques Department, Al-Farahidi University, Baghdad, Iraq
| | - Shahla Daneshmehr
- Young Researchers and Elite Club, Islamic Azad University, Tabriz, Iran.
| | - Sattar Arshadi
- Department of Chemistry, Payame Noor University, Tehran, Iran
| | - İnci Söğütlü
- Republic of Turkey Ministry of Agriculture and Forestry, Turkey
| | | | - Vahideh Abbasi
- Department of Chemistry, University of Zanjan, Zanjan, Iran
| | - Esmail Vessally
- Department of Chemistry, Payame Noor University, Tehran, Iran
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11
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Asiri AM, Shahzad MK, Hussain S, Zhu K, Khan SB, Alamry KA, Alfifi SY, Marwani HM. Analysis of XGaO 3 (X = Ba and Cs) cubic based perovskite materials for photocatalytic water splitting applications: a DFT study. Heliyon 2023; 9:e14112. [PMID: 36925547 PMCID: PMC10011483 DOI: 10.1016/j.heliyon.2023.e14112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2022] [Revised: 02/22/2023] [Accepted: 02/22/2023] [Indexed: 02/27/2023] Open
Abstract
Energy conversion has become an important technology for meeting energy production and consumption in the modern era. Water splitting and solar cell technologies are projected to close the gap between demand and consumption. Therefore, XGaO3 (X = Ba and Cs) compounds having characteristics i.e., electrical, optical, mechanical, and structural are depicted by using a density functional theory (DFT) based CASTEP software with ultrasoft pseudo-potential plane-wave and Generalized Gradient Approximation and Perdew Burke Ernzerhof exchange correlation functional (GGA-PBE). According to the findings, all of these compounds have a cubic "pm3m" structure with space group 221. The CsGaO3 and BaGaO3 have direct and indirect band gaps, with respect to electronic band-structure recreations. Density of states like total density of states (TDOS) and partial density of states (PDOS) commend the extent of localization of electrons in numerous bands. The optical properties of these compounds are explored by adjusting dispersion curve/relation for theoretical dielectric function (DF) scale to the corresponding peaks. As a result, these materials could be used to consume light in the visible zone via photo catalysis. CsGaO3 in combination with BaGaO3 can produce effective results, so these compounds have a remarkable potential application for sensing and water splitting.
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Affiliation(s)
- Abdullah M Asiri
- Chemistry Department, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Muhammad Khuram Shahzad
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, 64200, Pakistan.,Center of Theoretical and Computational Research, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Shoukat Hussain
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, 64200, Pakistan.,Center of Theoretical and Computational Research, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Kai Zhu
- Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin, 150001, China
| | - Sher Bahadar Khan
- Chemistry Department, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Khalid Ahmad Alamry
- Chemistry Department, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Soliman Y Alfifi
- Chemistry Department, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
| | - Hadi M Marwani
- Chemistry Department, Faculty of Science, King Abdulaziz University, P. O. Box 80203, Jeddah, 21589, Saudi Arabia
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12
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Shahzad MK, Mujtaba ST, Hussain S, Farooq MU, Laghari RA, Khan SA, Tahir MB, Rehman JU, Khalil A, Ali MM. Lithium-based perovskites materials for photovoltaic solar cell and protective rays window applications: a first-principle calculations. NANOSCALE RESEARCH LETTERS 2023; 18:15. [PMID: 36795251 DOI: 10.1186/s11671-023-03790-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 12/27/2022] [Indexed: 05/24/2023]
Abstract
Perovskites are the key enabler materials for the solar cell applications in the achievement of high performance and low production costs. In this article, the structural, mechanical, electronic, and optical properties of rubidium-based cubic nature perovskite LiHfO3 and LiZnO3 are investigated. These properties are investigated using density-functional theory with the aid of CASTEP software by introducing ultrasoft pseudo-potential plane-wave (USPPPW) and GG-approximation-PB-Ernzerhof exchange-correlation functionals. It is investigated that the proposed compounds exhibit stable cubic phase and meet the criteria of mechanical stability by the estimated elastic properties. Also, according to Pugh's criterion, it is noted that LiHfO3 is ductile and LiZnO3 is brittle. Furthermore, the electronic band structure investigation of LiHfO3 and LiZnO3 shows that they have indirect bandgap (BG). Moreover, the BG analysis of the proposed materials shows that these are easily accessible. Also, the results for partial density of states (DOS) and total DOS confirm the degree of a localized electron in the distinct band. In addition, the optical transitions in the compounds are examined by fitting the damping ratio for the notional dielectric functions scaling to the appropriate peaks. At absolute zero temperature, the materials are observed as semiconductors. Therefore, it is evident from the analysis that the proposed compounds are excellent candidates for solar cells and protective rays applications.
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Affiliation(s)
- Muhammad Khuram Shahzad
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, 64200, Pakistan.
- Center of Theoretical and Computational Research, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan.
| | - Syed Taqveem Mujtaba
- Department of Physics, Riphah International University, Faisalabad Campus, Faisalabad, Pakistan
| | - Shoukat Hussain
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, 64200, Pakistan
| | - Muhammad Umair Farooq
- Institute of Physics, The Islamia University of Bahawalpur, Bahawalpur, 63100, Pakistan
| | - Rashid Ali Laghari
- Interdisciplinary Research Center for Intelligent Manufacturing and Robotics, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Sajjad Ahmad Khan
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, 64200, Pakistan
| | - Muhammad Bilal Tahir
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, 64200, Pakistan
- Center of Theoretical and Computational Research, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Jalil Ur Rehman
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, 64200, Pakistan
- Center of Theoretical and Computational Research, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Adnan Khalil
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, 64200, Pakistan
| | - Muhammad Mahmood Ali
- Centre for Mathematical Modeling and Intelligent Systems for Health and Environment (MISHE), Atlantic Technological University Sligo, Ash Lane, Sligo, F91 YW50, Ireland
- Department of Mechatronic Engineering, Atlantic Technological University Sligo, Ash Lane, Sligo, F91 YW50, Ireland
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13
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Shahzad MK, Hussain S, Farooq MU, Laghari RA, Bilal MH, Khan SA, Tahir MB, Khalil A, Rehman JU, Ali MM. First-principles calculations to investigate structural, electronic, elastic and optical properties of radium based cubic fluoro-perovskite materials. Heliyon 2023; 9:e13687. [PMID: 36873152 PMCID: PMC9975092 DOI: 10.1016/j.heliyon.2023.e13687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Revised: 02/07/2023] [Accepted: 02/07/2023] [Indexed: 02/15/2023] Open
Abstract
Perovskite materials play a vital role in the field of material science via experimental as well as theoretical calculations. Radium semiconductor materials are considered the backbone of medical fields. These materials are considered in high technological fields to be used as controlling the decay ability. In this study, radium-based cubic fluoro-perovskite XRaF3 (where X = Rb and Na) are calculated using a DFT (density functional theory). These compounds are cubic nature with 221 space groups that construct on CASTEP (Cambridge-serial-total-energy-package) software with ultra-soft PPPW (pseudo-potential plane-wave) and GGA (Generalized-Gradient-approximation)-PBE (Perdew-Burke-Ernzerhof) exchange-correlation functional. The structural, optical, electronic, and mechanical properties of the compounds are calculated. According to the structural properties, NaRaF3 and RbRaF3 have a direct bandgap with 3.10eV and 4.187eV of NaRaF3 and RbRaF3, respectively. Total density of states (DOS) and partial density of states (PDOS) provide confirmation to the degree of electrons localized in distinct bands. NaRaF3 material is semiconductors and RbRaF3 is insulator, according to electronic results. The imaginary element dispersion of the dielectric function reveals its wide variety of energy transparency. In both compounds, the optical transitions are examined by fitting the damping ratio for the notional dielectric function scaling to the appropriate peaks. The absorption and the conductivity of NaRaF3 compound is better than the RbRaF3 compound which make it suitable for the solar cell applications increasing the efficiency and work function. We observed that both compounds are mechanically stable with cubic structure. The criteria for the mechanical stability of compounds are also met by the estimated elastic results. These compounds have potential application in field of solar cell and medical. Objectives The band gap, absorption and the conductivity are necessary conditions for potential applications. Here, literature was reviewed to check computational translational insight into the relationships between absorption and conductivity for solar cell and medical applications of novel RbRaF3 and NaRaF3 compounds.
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Affiliation(s)
- Muhammad Khuram Shahzad
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan.,Center of Theoretical and Computational Research, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Shoukat Hussain
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan
| | | | - Rashid Ali Laghari
- Interdisciplinary Research Center for Intelligent Manufacturing and Robotics, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Muhammad Hamza Bilal
- Research Center for Nanomaterials and Energy Technology, Sunway University Malaysia
| | - Sajjad Ahmad Khan
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan
| | - Muhammad Bilal Tahir
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan.,Center of Theoretical and Computational Research, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Adnan Khalil
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan
| | - Jalil Ur Rehman
- Institute of Physics, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan 64200, Pakistan.,Center of Theoretical and Computational Research, Khwaja Fareed University of Engineering and Information Technology, Rahim Yar Khan, Pakistan
| | - Muhammad Mahmood Ali
- Department of Mechatronic Engineering, Atlantic Technological University Sligo, Ash Lane, F91 YW50 Sligo, Ireland.,Centre for Mathematical Modeling and Intelligent Systems for Health and Environment (MISHE), Atlantic Technological University Sligo, Ash Lane, F91 YW50 Sligo, Ireland
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14
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Duan L, Wang X, Zhao J, Zhang J, Du S, Feng Y, Zhao Z, Wang S, Jin C. High-Pressure Synthesis and Physical Properties of a Spinel Compound FeAl 2S 4. Inorg Chem 2022; 61:13184-13190. [PMID: 35943140 DOI: 10.1021/acs.inorgchem.2c02034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A spinel compound FeAl2S4 was successfully synthesized under high-pressure and high-temperature conditions and was systematically characterized via the structural, magnetic, and specific heat measurements. It crystallizes into a cubic structure with the space group Fd3̅m (no. 227) and the lattice constant a = 10.0207(2) Å. A Fe/Al site inversion is found; that is, the molecular formula can be rewritten as (Fe1-xAlx)(Al2-xFex)S4, and the inversion parameter x is about 0.22. Magnetic susceptibility measurements indicate that FeAl2S4 undergoes a spin glass behavior, which is confirmed by ac susceptibility and specific heat measurements. The freezing temperature Tf ∼ 10.5 K and Weiss temperature Tθ ∼ -107.4 K lead to a high frustration parameter f = |Tθ/Tf| of about 10, which suggests that FeAl2S4 is a high-frustration magnet. Our results indicate that high pressure can help stabilize the spinel structure with small R̅σ and the cation inversion plays an important role in the formation of the spin glass state.
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Affiliation(s)
- Lei Duan
- School of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450007, China
| | - Xiancheng Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Jianfa Zhao
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Jun Zhang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Suxuan Du
- School of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450007, China
| | - Yagang Feng
- School of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450007, China
| | - Zhiwei Zhao
- School of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450007, China
| | - Shun Wang
- School of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450007, China
| | - Changqing Jin
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.,School of Physics, University of Chinese Academy of Sciences, Beijing 100190, China.,Songshan Lake Materials Laboratory, Dongguan 523808, China
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15
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Widely Tuneable Composition and Crystallinity of Graded Na 1+xTaO 3±δ Thin Films Fabricated by Chemical Beam Vapor Deposition. NANOMATERIALS 2022; 12:nano12061012. [PMID: 35335825 PMCID: PMC8948640 DOI: 10.3390/nano12061012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 03/15/2022] [Accepted: 03/16/2022] [Indexed: 02/05/2023]
Abstract
Combinatorial approach has been widely recognized as a powerful strategy to develop new-higher performance materials and shed the light on the stoichiometry-dependent properties of known systems. Herein, we take advantage of the unique features of chemical beam vapor deposition to fabricate compositionally graded Na1+xTaO3±δ thin films with −0.6 < x < 0.5. Such a varied composition was enabled by the ability of the employed technique to deliver and combine an extensive range of precursors flows over the same deposition area. The film growth occurred in a complex process, where precursor absolute flows, flow ratios, and substrate temperature played a role. The deviation of the measured Na/Ta ratios from those predicted by flow simulations suggests that a chemical-reaction limited regime underlies the growth mechanism and highlights the importance of the Ta precursor in assisting the decomposition of the Na one. The crystallinity was observed to be strongly dependent on its stoichiometry. High under-stoichiometries (e.g., Na0.5TaO3−δ) compared to NaTaO3 were detrimental for the formation of a perovskite framework, owing to the excessive amount of sodium vacancies and oxygen vacancies. Conversely, a well-crystallized orthorhombic perovskite structure peculiar of NaTaO3 was observed from mildly under-stoichiometric (e.g., Na0.9TaO3−δ) to highly over-stoichiometric (e.g., Na1.5TaO3+δ) compositions.
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16
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Han D, Feng C, Du MH, Zhang T, Wang S, Tang G, Bein T, Ebert H. Design of High-Performance Lead-Free Quaternary Antiperovskites for Photovoltaics via Ion Type Inversion and Anion Ordering. J Am Chem Soc 2021; 143:12369-12379. [PMID: 34339219 DOI: 10.1021/jacs.1c06403] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The emergence of halide double perovskites significantly increases the compositional space for lead-free and air-stable photovoltaic absorbers compared to halide perovskites. Nevertheless, most halide double perovskites exhibit oversized band gaps (>1.9 eV) or dipole-forbidden optical transition, which are unfavorable for efficient single-junction solar cell applications. The current device performance of halide double perovskite is still inferior to that of lead-based halide perovskites, such as CH3NH3PbI3 (MAPbI3). Here, by ion type inversion and anion ordering on perovskite lattice sites, two new classes of pnictogen-based quaternary antiperovskites with the formula of X6B2AA' and X6BB'A2 are designed. Phase stability and tunable band gaps in these quaternary antiperovskites are demonstrated based on first-principles calculations. Further photovoltaic-functionality-directed screening of these materials leads to the discovery of 5 stable compounds (Ca6N2AsSb, Ca6N2PSb, Sr6N2AsSb, Sr6N2PSb, and Ca6NPSb2) with suitable direct band gaps, small carrier effective masses and low exciton binding energies, and dipole-allowed strong optical absorption, which are favorable properties for a photovoltaic absorber material. The calculated theoretical maximum solar cell efficiencies based on these five compounds are all larger than 29%, comparable to or even higher than that of the MAPbI3 based solar cell. Our work reveals the huge potential of quaternary antiperovskites in the optoelectronic field and provides a new strategy to design lead-free and air-stable perovskite-based photovoltaic absorber materials.
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Affiliation(s)
- Dan Han
- Department of Chemistry, University of Munich, Munich D-81377, Germany
| | - Chunbao Feng
- School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, P. R. China
| | - Mao-Hua Du
- Materials Science & Technology Division, Oak Ridge National Labortory, Oak Ridge, Tennessee 37831, United States
| | - Tao Zhang
- Key Laboratory of Polar Materials and Devices (MOE), East China Normal University, Shanghai 200241, P. R. China
| | - Shizhe Wang
- Department of Chemistry, University of Munich, Munich D-81377, Germany
| | - Gang Tang
- Theoretical Materials Physics, Q-MAT, CESAM, University of Liège, B-4000 Liège, Belgium
| | - Thomas Bein
- Department of Chemistry, University of Munich, Munich D-81377, Germany
| | - Hubert Ebert
- Department of Chemistry, University of Munich, Munich D-81377, Germany
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