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Zou W, Lou B, Kurboniyon MS, Buryi M, Rahimi F, Srivastava AM, Brik MG, Wang J, Ma C. Unraveling Broadband Near-Infrared Luminescence in Cr 3+-Doped Ca 3Y 2Ge 3O 12 Garnets: Insights from First-Principles Analysis. Materials (Basel) 2024; 17:1709. [PMID: 38612222 PMCID: PMC11012761 DOI: 10.3390/ma17071709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/01/2024] [Accepted: 04/04/2024] [Indexed: 04/14/2024]
Abstract
In this study, we conducted an extensive investigation into broadband near-infrared luminescence of Cr3+-doped Ca3Y2Ge3O12 garnet, employing first-principles calculations within the density functional theory framework. Our initial focus involved determining the site occupancy of Cr3+ activator ions, which revealed a pronounced preference for the Y3+ sites over the Ca2+ and Ge4+ sites, as evidenced by the formation energy calculations. Subsequently, the geometric structures of the excited states 2E and 4T2, along with their optical transition energies relative to the ground state 4A2 in Ca3Y2Ge3O12:Cr3+, were successfully modeled using the ΔSCF method. Calculation convergence challenges were effectively addressed through the proposed fractional particle occupancy schemes. The constructed host-referred binding energy diagram provided a clear description of the luminescence kinetics process in the garnet, which explained the high quantum efficiency of emission. Furthermore, the accurate prediction of thermal excitation energy yielded insights into the thermal stability of the compound, as illustrated in the calculated configuration coordinate diagram. More importantly, all calculated data were consistently aligned with the experimental results. This research not only advances our understanding of the intricate interplay between geometric and electronic structures, optical properties, and thermal behavior in Cr3+-doped garnets but also lays the groundwork for future breakthroughs in the high-throughput design and optimization of luminescent performance and thermal stability in Cr3+-doped phosphors.
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Affiliation(s)
- Wei Zou
- School of Science and Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China; (W.Z.); (B.L.); (M.S.K.)
| | - Bibo Lou
- School of Science and Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China; (W.Z.); (B.L.); (M.S.K.)
| | - Mekhrdod S. Kurboniyon
- School of Science and Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China; (W.Z.); (B.L.); (M.S.K.)
- Center of Innovative Development of Science and New Technologies, National Academy of Sciences of Tajikistan, Dushanbe 734025, Tajikistan;
| | - Maksym Buryi
- Institute of Plasma Physics of the Czech Academy of Sciences, U Slovanky 2525/1a, 18200 Prague, Czech Republic;
| | - Farhod Rahimi
- Center of Innovative Development of Science and New Technologies, National Academy of Sciences of Tajikistan, Dushanbe 734025, Tajikistan;
| | - Alok M. Srivastava
- Current Lighting Solutions LLC., 1099 Ivanhoe Road, Cleveland, OH 44110, USA;
| | - Mikhail G. Brik
- School of Science and Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China; (W.Z.); (B.L.); (M.S.K.)
- Centre of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, 11351 Belgrade, Serbia
- Institute of Physics, University of Tartu, W. Ostwald Str. 1, 50411 Tartu, Estonia
- Faculty of Science and Technology, Jan Długosz University, Armii Krajowej 13/15, PL-42200 Częstochowa, Poland
- Academy of Romanian Scientists, 3 Ilfov, 050044 Bucharest, Romania
| | - Jing Wang
- Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, China;
| | - Chonggeng Ma
- School of Science and Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China; (W.Z.); (B.L.); (M.S.K.)
- Center of Innovative Development of Science and New Technologies, National Academy of Sciences of Tajikistan, Dushanbe 734025, Tajikistan;
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Fakhrul T, Khurana B, Lee BH, Huang S, Nembach HT, Beach GSD, Ross CA. Damping and Interfacial Dzyaloshinskii-Moriya Interaction in Thulium Iron Garnet/Bismuth-Substituted Yttrium Iron Garnet Bilayers. ACS Appl Mater Interfaces 2024; 16:2489-2496. [PMID: 38180749 DOI: 10.1021/acsami.3c14706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Thin films of ferrimagnetic iron garnets can exhibit useful magnetic properties, including perpendicular magnetic anisotropy (PMA) and high domain wall velocities. In particular, bismuth-substituted yttrium iron garnet (BiYIG) films grown on garnet substrates have a low Gilbert damping but zero Dzyaloshinskii-Moriya interaction (DMI), whereas thulium iron garnet (TmIG) films have higher damping but a nonzero DMI. We report the damping and DMI of thulium-substituted BiYIG (BiYTmIG) and TmIG|BiYIG bilayer thin films deposited on (111) substituted gadolinium gallium garnet and neodymium gallium garnet (NGG) substrates. The films are epitaxial and exhibit PMA. BiYIG|TmIG bilayers have a damping value that is an order of magnitude lower than that of TmIG, and BiYIG|TmIG|NGG have DMI of 0.0145 ± 0.0011 mJ/m2, similar to that of TmIG|NGG. The bilayer therefore provides a combination of DMI and moderate damping, useful for the development of high-speed spin orbit torque-driven devices.
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Affiliation(s)
- Takian Fakhrul
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Bharat Khurana
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Byung Hun Lee
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Siying Huang
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Hans T Nembach
- Associate, Physical Measurement Laboratory, National Institute of Standards and Technology, Boulder, Colorado 80305, United States
- Department of Physics, University of Colorado Boulder, Boulder, Colorado 80309, United States
| | - Geoffrey S D Beach
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Caroline A Ross
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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3
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Inkrataite G, Skruodiene M, Skaudzius R. Synthesis and investigation of novel boron- and magnesium-doped YAG:Ce and LuAG:Ce phosphor ceramics. LUMINESCENCE 2024; 39:e4673. [PMID: 38286598 DOI: 10.1002/bio.4673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/15/2023] [Accepted: 12/19/2023] [Indexed: 01/31/2024]
Abstract
YAG:Ce and LuAG:Ce ceramics are widely used as scintillator materials that convert high-energy radiation into visible light. For the practical application of such compounds, short decay times are a necessity. One way of shortening the existing decay times even more is to change the local environment of emitting ions by means of doping the matrix with additional elements, for example, boron or magnesium. Furthermore, boron ions also can help absorb gamma rays more efficiently, therefore improving overall applicability. Due to the aforementioned reasons, YAG and LuAG ceramics doped with cerium, boron, and magnesium were synthesized. Initial amorphous powders have been obtained by means of sol-gel synthesis and pressed into pellets under isostatic pressure and finally calcinated to form crystalline ceramics. The effects of boron and magnesium doping on the morphological, structural, and luminescence properties were investigated. The key results showed that doping with boron has indeed shortened the decay times of the garnet pellets. Overall, boron doping of ceramics is a relatively new research area; however, it is rather promising as it helps both to improve the luminescence properties and to increase particle growth rate.
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Affiliation(s)
- Greta Inkrataite
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Vilnius, Lithuania
| | - Monika Skruodiene
- Institute of Solid State Physics, University of Latvia, Riga, Latvia
| | - Ramunas Skaudzius
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Vilnius, Lithuania
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4
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Rosenberg E, Bauer J, Cho E, Kumar A, Pelliciari J, Occhialini CA, Ning S, Kaczmarek A, Rosenberg R, Freeland JW, Chen YC, Wang JP, LeBeau J, Comin R, de Groot FMF, Ross CA. Revealing Site Occupancy in a Complex Oxide: Terbium Iron Garnet. Small 2023:e2300824. [PMID: 37060220 DOI: 10.1002/smll.202300824] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Indexed: 06/19/2023]
Abstract
Complex oxide films stabilized by epitaxial growth can exhibit large populations of point defects which have important effects on their properties. The site occupancy of pulsed laser-deposited epitaxial terbium iron garnet (TbIG) films with excess terbium (Tb) is analyzed, in which the terbium:iron (Tb:Fe)ratio is 0.86 compared to the stoichiometric value of 0.6. The magnetic properties of the TbIG are sensitive to site occupancy, exhibiting a higher compensation temperature (by 90 K) and a lower Curie temperature (by 40 K) than the bulk Tb3 Fe5 O12 garnet. Data derived from X-ray core-level spectroscopy, magnetometry, and molecular field coefficient modeling are consistent with occupancy of the dodecahedral sites by Tb3+ , the octahedral sites by Fe3+ , Tb3+ and vacancies, and the tetrahedral sites by Fe3+ and vacancies. Energy dispersive X-ray spectroscopy in a scanning transmission electron microscope provides direct evidence of TbFe antisites. A small fraction of Fe2+ is present, and oxygen vacancies are inferred to be present to maintain charge neutrality. Variation of the site occupancies provides a path to considerable manipulation of the magnetic properties of epitaxial iron garnet films and other complex oxides, which readily accommodate stoichiometries not found in their bulk counterparts.
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Affiliation(s)
- Ethan Rosenberg
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
- 3M Corporate Research Materials Laboratory, 3M Center, St. Paul, MN, 55114, USA
| | - Jackson Bauer
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Eunsoo Cho
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Abinash Kumar
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Jonathan Pelliciari
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, 02139, United States
- National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Connor A Occhialini
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, 02139, United States
| | - Shuai Ning
- School of Materials Science and Engineering, Nankai University, Tianjin, 300350, P. R. China
| | - Allison Kaczmarek
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Richard Rosenberg
- Advanced Photon Source, X-Ray Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - John W Freeland
- Advanced Photon Source, X-Ray Science Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Yu-Chia Chen
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota, 55455, USA
| | - Jian-Ping Wang
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota, 55455, USA
| | - James LeBeau
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Riccardo Comin
- Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, 02139, United States
| | - F M F de Groot
- Materials Chemistry and Catalysis, Utrecht University, Universiteitslaan 99, Utrecht, 3584 CG, Netherlands
| | - Caroline A Ross
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
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5
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Mrozik A, Bilski P, Gieszczyk W, Kłosowski M, Witkiewicz-Łukaszek S, Gorbenko V, Zorenko T, Zorenko Y. Application of the LPE-Grown LuAG: Ce Film/YAG Crystal Composite Thermoluminescence Detector for Distinguishing the Components of the Mixed Radiation Field. Materials (Basel) 2022; 15:ma15248708. [PMID: 36556514 PMCID: PMC9788480 DOI: 10.3390/ma15248708] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 11/28/2022] [Accepted: 12/01/2022] [Indexed: 05/27/2023]
Abstract
Single-crystalline films (SCFs) of the LuAG: Ce garnet grown using the liquid-phase epitaxy method onto YAG single-crystal (SC) substrates were investigated for possible applications as composite thermoluminescent (TL) detectors. Such detectors may help to register the different components of ionizing radiation fields with various penetration depths, e.g., heavy charged particles and gamma or beta rays. It was found that the TL signal of LuAG: Ce SCF sufficiently differs from that of the YAG substrate concerning both the temperature and wavelength of emissions. Furthermore, even by analyzing TL glow curves, it was possible to distinguish the difference between weakly and deeply penetrating types of radiation. Within a test involving the exposure of detectors with the mixed alpha/beta radiations, the doses of both components were determined with an accuracy of a few percent.
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Affiliation(s)
- Anna Mrozik
- Institute of Nuclear Physics Polish Academy of Sciences, 31-342 Krakow, Poland
| | - Paweł Bilski
- Institute of Nuclear Physics Polish Academy of Sciences, 31-342 Krakow, Poland
| | - Wojciech Gieszczyk
- Institute of Nuclear Physics Polish Academy of Sciences, 31-342 Krakow, Poland
| | - Mariusz Kłosowski
- Institute of Nuclear Physics Polish Academy of Sciences, 31-342 Krakow, Poland
| | | | - Vitaliy Gorbenko
- Institute of Physics, Kazimierz Wielki University, 85-064 Bydgoszcz, Poland
| | - Tetiana Zorenko
- Institute of Physics, Kazimierz Wielki University, 85-064 Bydgoszcz, Poland
| | - Yuriy Zorenko
- Institute of Physics, Kazimierz Wielki University, 85-064 Bydgoszcz, Poland
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6
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Bilski P, Mrozik A, Gieszczyk W, Nizhankovskiy S, Zorenko Y. Infrared Stimulated Luminescence of Ce 3+ Doped YAG Crystals. Materials (Basel) 2022; 15:ma15238288. [PMID: 36499784 PMCID: PMC9735693 DOI: 10.3390/ma15238288] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/14/2022] [Accepted: 11/19/2022] [Indexed: 05/27/2023]
Abstract
In this study, the infrared optically stimulated luminescence (IRSL) of single crystals of Ce3+ doped yttrium aluminum garnet (YAG) was investigated for the first time. It was found that infrared stimulation of these crystals, following previous exposure to beta radiation, produces a strong luminescence signal. The highest luminescence efficiency was exhibited by the YAG crystal with 0.1% of Ce. With this crystal, it was possible to measure as low doses as 0.1 mGy. Moreover, IRSL is mainly related to the TL peak at a relatively high temperature of c.a. 175 °C, which leads to quite good stability of the signal in time. These properties create good prospects for potential applications of YAG:Ce in dosimetric radiation measurements.
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Affiliation(s)
- Paweł Bilski
- Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31342 Kraków, Poland
| | - Anna Mrozik
- Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31342 Kraków, Poland
| | - Wojciech Gieszczyk
- Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, 31342 Kraków, Poland
| | - Sergiy Nizhankovskiy
- Institute for Single Crystals, National Academy of Sciences of Ukraine, av. Nauki 60, 61178 Kharkiv, Ukraine
| | - Yuriy Zorenko
- Institute of Physics, Kazimierz Wielki University in Bydgoszcz, Powstańców Wielkopolskich Str. 2, 85090 Bydgoszcz, Poland
- Oncology Center, Medical Physics Department, Romanowskiej 2, 85796 Bydgoszcz, Poland
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7
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Zheng G, Xiao W, Wu J, Liu X, Masai H, Qiu J. Glass-Crystallized Luminescence Translucent Ceramics toward High-Performance Broadband NIR LEDs. Adv Sci (Weinh) 2022; 9:e2105713. [PMID: 35072364 PMCID: PMC8922114 DOI: 10.1002/advs.202105713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 12/30/2021] [Indexed: 05/05/2023]
Abstract
Near-infrared (NIR) phosphor-converted light-emitting diodes (pc-LEDs) are newly emergent broadband light sources for miniaturizing optical systems like spectrometers. However, traditional converters with NIR phosphors encapsulated by organic resins suffer from low external quantum efficiency (EQE), strong thermal quenching as well as low thermal conductivity, thus limiting the device efficiency and output power. Through pressureless crystallization from the designed aluminosilicate glasses, here broadband Near-infrared (NIR) emitting translucent ceramics are developed with high EQE (59.5%) and excellent thermal stability (<10% intensity loss and negligible variation of emission profile at 150 °C) to serve as all-inorganic visible-to-NIR converters. A high-performance NIR phosphor-converted light emitting diodes is further demonstrated with a record NIR photoelectric efficiency (output power) of 21.2% (62.6 mW) at 100 mA and a luminescence saturation threshold up to 184 W cm-2 . The results can substantially expand the applications of pc-LEDs, and may open up new opportunity to design efficient broadband emitting materials.
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Affiliation(s)
- Guojun Zheng
- State Key Lab of Modern Optical InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Wenge Xiao
- State Key Lab of Modern Optical InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Jianhong Wu
- State Key Lab of Modern Optical InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Xiaofeng Liu
- School of Materials Science and EngineeringZhejiang UniversityHangzhou310027P. R. China
| | - Hirokazu Masai
- National Institute of Advanced Industrial Science and TechnologyOsaka563‐8577Japan
| | - Jianrong Qiu
- State Key Lab of Modern Optical InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhou310027P. R. China
- CAS Center for Excellence in Ultra‐intense Laser ScienceShanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai201800P. R. China
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Witkiewicz-Lukaszek S, Gorbenko V, Zorenko T, Syrotych Y, Mares JA, Nikl M, Sidletskiy O, Bilski P, Yoshikawa A, Zorenko Y. Composite Detectors Based on Single-Crystalline Films and Single Crystals of Garnet Compounds. Materials (Basel) 2022; 15:1249. [PMID: 35161191 DOI: 10.3390/ma15031249] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 01/23/2022] [Accepted: 01/29/2022] [Indexed: 02/06/2023]
Abstract
This manuscript summarizes recent results on the development of composite luminescent materials based on the single-crystalline films and single crystals of simple and mixed garnet compounds obtained by the liquid-phase epitaxy growth method. Such composite materials can be applied as scintillating and thermoluminescent (TL) detectors for radiation monitoring of mixed ionization fluxes, as well as scintillation screens in the microimaging techniques. The film and crystal parts of composite detectors were fabricated from efficient scintillation/TL materials based on Ce3+-, Pr3+-, and Sc3+-doped Lu3Al5O12 garnets, as well as Ce3+-doped Gd3−xAxAl5−yGayO12 mixed garnets, where A = Lu or Tb; x = 0–1; y = 2–3 with significantly different scintillation decay or positions of the main peaks in their TL glow curves. This work also summarizes the results of optical study of films, crystals, and epitaxial structures of these garnet compounds using absorption, cathodoluminescence, and photoluminescence. The scintillation and TL properties of the developed materials under α- and β-particles and γ-quanta excitations were studied as well. The most efficient variants of the composite scintillation and TL detectors for monitoring of composition of mixed beams of ionizing radiation were selected based on the results of this complex study.
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Besli MM, Usubelli C, Metzger M, Pande V, Harry K, Nordlund D, Sainio S, Christensen J, Doeff MM, Kuppan S. Effect of Liquid Electrolyte Soaking on the Interfacial Resistance of Li 7La 3Zr 2O 12 for All-Solid-State Lithium Batteries. ACS Appl Mater Interfaces 2020; 12:20605-20612. [PMID: 32286048 DOI: 10.1021/acsami.0c06194] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The impact of liquid electrolyte soaking on the interfacial resistance between the garnet-structured Li7La3Zr2O12 (LLZO) solid electrolyte and metallic lithium has been studied. Lithium carbonate (Li2CO3) formed by inadvertent exposure of LLZO to ambient conditions is generally known to increase interfacial impedance and decrease lithium wettability. Soaking LLZO powders and pellets in the electrolyte containing lithium tetrafluoroborate (LiBF4) shows a significantly reduced interfacial resistance and improved contact between lithium and LLZO. Raman spectroscopy, X-ray diffraction, and soft X-ray absorption spectroscopy reveal how Li2CO3 is continuously removed with increasing soaking time. On-line mass spectrometry and free energy calculations show how LiBF4 reacts with surface carbonate to form carbon dioxide. Using a very simple and scalable process that does not involve heat-treatment and expensive coating techniques, we show that the Li-LLZO interfacial resistance can be reduced by an order of magnitude.
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Affiliation(s)
- Münir M Besli
- Research and Technology Center, Robert Bosch LLC, Sunnyvale, California 94085, United States
- Department of Mechanical Engineering, Karlsruhe Institute of Technology (KIT), Karlsruhe 76131, Germany
| | - Camille Usubelli
- Research and Technology Center, Robert Bosch LLC, Sunnyvale, California 94085, United States
- Institute of Physics and Chemistry of Materials of Strasbourg (IPCMS), UMR 7504 CNRS, University of Strasbourg, Strasbourg Cedex 2 67034, France
| | - Michael Metzger
- Research and Technology Center, Robert Bosch LLC, Sunnyvale, California 94085, United States
| | - Vikram Pande
- Research and Technology Center, Robert Bosch LLC, Sunnyvale, California 94085, United States
| | | | - Dennis Nordlund
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Sami Sainio
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Jake Christensen
- Research and Technology Center, Robert Bosch LLC, Sunnyvale, California 94085, United States
| | - Marca M Doeff
- Lawrence Berkeley National Laboratory, Energy Storage and Distributed Resources Division, University of California, Berkeley, California 94720, United States
| | - Saravanan Kuppan
- Research and Technology Center, Robert Bosch LLC, Sunnyvale, California 94085, United States
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10
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Kniec K, Ledwa K, Marciniak L. Enhancing the Relative Sensitivity of V 5+, V 4+ and V 3+ Based Luminescent Thermometer by the Optimization of the Stoichiometry of Y 3Al 5-xGa xO 12 Nanocrystals. Nanomaterials (Basel) 2019; 9:nano9101375. [PMID: 31557921 PMCID: PMC6836024 DOI: 10.3390/nano9101375] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2019] [Revised: 09/09/2019] [Accepted: 09/24/2019] [Indexed: 01/03/2023]
Abstract
In this work the influence of the Ga3+ concentration on the luminescent properties and the abilities of the Y3Al5−xGaxO12: V nanocrystals to noncontact temperature sensing were investigated. It was shown that the increase of the Ga3+ amount enables enhancement of V4+ emission intensity in respect to the V3+ and V5+ and thus modify the color of emission. The introduction of Ga3+ ions provides the appearance of the crystallographic sites, suitable for V4+ occupation. Consequently, the increase of V4+ amount facilitates V5+ → V4+ interionic energy transfer throughout the shortening of the distance between interacting ions. The opposite thermal dependence of V4+ and V5+ emission intensities enables to create the bandshape luminescent thermometr of the highest relative sensitivity of V-based luminescent thermometers reported up to date (Smax, 2.64%/°C, for Y3Al2Ga3O12 at 0 °C). An approach of tuning the performance of Y3Al5−xGaxO12: V nanocrystals to luminescent temperature sensing, including the spectral response, maximal relative sensitivity and usable temperature range, by the Ga3+ doping was presented and discussed.
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Affiliation(s)
- Karolina Kniec
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland.
| | - Karolina Ledwa
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland.
| | - Lukasz Marciniak
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422 Wroclaw, Poland.
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11
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Elzbieciak K, Marciniak L. The Impact of Cr 3+ Doping on Temperature Sensitivity Modulation in Cr 3+ Doped and Cr 3+, Nd 3+ Co-doped Y 3Al 5O 12, Y 3Al 2Ga 3O 12, and Y 3Ga 5O 12 Nanothermometers. Front Chem 2018; 6:424. [PMID: 30283774 PMCID: PMC6157326 DOI: 10.3389/fchem.2018.00424] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 08/28/2018] [Indexed: 12/03/2022] Open
Abstract
A new approach to enhance the sensitivity of transition metal ion based nanocrystalline luminescent thermometer is presented. It was shown that the increase of Cr3+ concentration in three types of garnet host namely Y3Al5O12, Y3Ga5O12, and Y3Al2Ga3O12 allows for significant enhancement of their performance in non-contact thermometry. This phenomenon is related to the weakening of the crystal field strength due to enlargement of average Cr3+-O2− distance at higher Cr3+ concentrations. By increasing Cr3+ concentration from 0.6 to 30%, the sensitivity increased by over one order of magnitude from S = 0.2%/°C to S = 2.2%/°C at 9°C in Y3Al2Ga3O12 nanocrystals. Moreover, it was found that due to the Cr3+ → Nd3+ energy transfer in the Cr3+, Nd3+ co-doped system, the usable Cr3+ concentration, for which its emission can be detected, is limited to 10% while the sensitivity at −50°C was doubled (from 1.3%/°C for Y3Al2Ga3O12:10%Cr3+ to 2.2%/°C Y3Al2Ga3O12:10%Cr3+, 1%Nd3+ nanocrystals).
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Affiliation(s)
| | - Lukasz Marciniak
- Institute of Low Temperatures and Structure Research PAS, Wrocław, Poland
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