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Polimeno L, Coriolano A, Mastria R, Todisco F, De Giorgi M, Fieramosca A, Pugliese M, Prontera CT, Rizzo A, De Marco L, Ballarini D, Gigli G, Sanvitto D. Room Temperature Polariton Condensation from Whispering Gallery Modes in CsPbBr 3 Microplatelets. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2312131. [PMID: 38632702 DOI: 10.1002/adma.202312131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 03/28/2024] [Indexed: 04/19/2024]
Abstract
Room temperature (RT) polariton condensate holds exceptional promise for revolutionizing various fields of science and technology, encompassing optoelectronics devices to quantum information processing. Using perovskite materials, like all-inorganic cesium lead bromide (CsPbBr3) single crystal, provides additional advantages, such as ease of synthesis, cost-effectiveness, and compatibility with existing semiconductor technologies. In this work, the formation of whispering gallery modes (WGM) in CsPbBr3 single crystals with controlled geometry is shown, synthesized using a low-cost and efficient capillary bridge method. Through the implementation of microplatelets geometry, enhanced optical properties and performance are achieved due to the presence of sharp edges and a uniform surface, effectively avoiding non-radiative scattering losses caused by defects. This allows not only to observe strong light matter coupling and formation of whispering gallery polaritons, but also to demonstrate the onset of polariton condensation at RT. This investigation not only contributes to the advancement of the knowledge concerning the exceptional optical properties of perovskite-based polariton systems, but also unveils prospects for the exploration of WGM polariton condensation within the framework of a 3D perovskite-based platform, working at RT. The unique characteristics of polariton condensate, including low excitation thresholds and ultrafast dynamics, open up unique opportunities for advancements in photonics and optoelectronics devices.
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Affiliation(s)
- Laura Polimeno
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Annalisa Coriolano
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Rosanna Mastria
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Francesco Todisco
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Milena De Giorgi
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Antonio Fieramosca
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Marco Pugliese
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Carmela T Prontera
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Aurora Rizzo
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Luisa De Marco
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Dario Ballarini
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Giuseppe Gigli
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
- Dipartimento di Matematica e Fisica "Ennio de Giorgi", Universitá del Salento, Lecce, 73100, Italy
| | - Daniele Sanvitto
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
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Dong S, Hu Y, Zhang X, Guo Z, Chen R, Mao L. Anisotropy of Anion Diffusion in All-Inorganic Perovskite Single Crystals. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2307360. [PMID: 38217294 DOI: 10.1002/smll.202307360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 01/02/2024] [Indexed: 01/15/2024]
Abstract
Ion diffusion is a fundamentally important process in understanding and manipulating the optoelectronic properties of semiconductors. Most current studies on ionic diffusion have been focusing on perovskite polycrystalline thin films and nanocrystals. However, the random orientation and grain boundaries can heavily interfere with the kinetics of ion diffusion, where the experimental results only reveal the average ion exchange kinetics and the actual ion diffusion mechanisms perpendicular to the direction of individual crystal facets remain unclear. Here, the anion (Cl, I) diffusion anisotropy on (111) and (100) facets of CsPbBr3 single crystals is demonstrated. The as-grown single crystals with (111) and (100) facets exhibit anisotropic growth with different halide incorporation, which lead to different resulting optoelectronic properties. Combined experimental characterizations and theoretical calculations reveal that the (111) CsPbBr3 shows a faster anion diffusion behavior compared with that of the (100) CsPbBr3 , with a lower diffusion energy barrier, a larger built-in electric field, and lower inverse defect formation energy. The work highlights the anion diffusion anisotropic mechanisms perpendicular to the direction of individual crystal facets for optimizing and designing perovskite optoelectronic devices.
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Affiliation(s)
- Shunhong Dong
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, P. R. China
| | - Yaoqiao Hu
- Department of Materials Science and Engineering, The University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Xuanyu Zhang
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, P. R. China
| | - Zhu Guo
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, P. R. China
| | - Rui Chen
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, P. R. China
| | - Lingling Mao
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, P. R. China
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Xu J, Zhang W, Lv P, Li F, Zhan X, Zhang Y, Liu X. Improved Fluorescence and Photoelectrical Properties of CsPbBr 3 by Constructing Heterojunctions under Pressure. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2305870. [PMID: 37705123 DOI: 10.1002/smll.202305870] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 09/06/2023] [Indexed: 09/15/2023]
Abstract
All-inorganic cesium lead bromide quantum dots (CsPbBr3 -QD) compounds are potential candidates for optoelectronic devices, because of their excellent fluorescence luminescence and thermal stability. However, the many heterojunction interfaces and large band gap induce the low power conversion efficiency in the CsPbBr3 -QD heterojunction, limiting its practical applications. Hereby, in combination with the pressure regulation and TiO2 /CsPbBr3 -QD heterojunction, the interface interaction within the heterojunction can be enhanced and the band gap can be narrowed. The pressure-induced O─Ti─O bond softening and PbBr6 octahedron stiffening at the interface region significantly enhance the interface interactions that are favorable to the carrier transport. Compared with CsPbBr3 -QD, the atomic interaction between Pb and Br of TiO2 /CsPbBr3 -QD heterojunction can be dramatically enhanced at high pressures, leading to increased band gap narrowing rate by two times, which is useful to widen the absorption spectrum. The fluorescence intensity increases by two times. Compression increases the photocurrent and maintains it after the pressure is released, which is due to the enhanced interface interaction induced by the high pressure. The findings provide new opportunities to adjust the physical properties of perovskite heterogeneous structures, and have important applications in the field of new-generation photovoltaic devices.
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Affiliation(s)
- Jie Xu
- Laboratory of High Pressure Physics and Material Science (HPPMS), School of Physics and Physical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Wenhu Zhang
- Laboratory of High Pressure Physics and Material Science (HPPMS), School of Physics and Physical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
| | - Pin Lv
- Laboratory of High Pressure Physics and Material Science (HPPMS), School of Physics and Physical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
- Advanced Research Institute of Multidisciplinary Sciences, Qufu Normal University, Qufu, Shandong Province, 273165, China
| | - Fengjiao Li
- MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing, 102249, China
| | - Xinhui Zhan
- Graduate School of Advanced Science and Engineering, Hiroshima University, Higashihiroshima, Hiroshima, 739-8526, Japan
| | - Yongsheng Zhang
- Laboratory of High Pressure Physics and Material Science (HPPMS), School of Physics and Physical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
- Advanced Research Institute of Multidisciplinary Sciences, Qufu Normal University, Qufu, Shandong Province, 273165, China
| | - Xiaobing Liu
- Laboratory of High Pressure Physics and Material Science (HPPMS), School of Physics and Physical Engineering, Qufu Normal University, Qufu, Shandong, 273165, China
- Advanced Research Institute of Multidisciplinary Sciences, Qufu Normal University, Qufu, Shandong Province, 273165, China
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Shi Y, Chen Y, Dong H, Wang H, Qian P. Investigation of phase transition, mechanical behavior and lattice thermal conductivity of halogen perovskites using machine learning interatomic potentials. Phys Chem Chem Phys 2023; 25:30644-30655. [PMID: 37933446 DOI: 10.1039/d3cp04657e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Using a machine learning (ML) approach to fit DFT data, interatomic potentials have been successfully extracted. In this study, the phase transition, mechanical behavior and lattice thermal conductivity are investigated for halogen perovskites using NEP-based MD simulations in a large supercell including 16 000 atoms, which breaks through the size and temperature effects in DFT. A clear phase transition from orthorhombic (γ) → tetragonal (β) → cubic (α) is observed during the heating process. During the cooling process, CsPbCl3 and CsPbBr3 exhibit perfect reversible behavior, while CsPbI3 only undergoes a phase transition from α to β. Then, the key mechanical parameters, including Poisson's ratio, tensile strength, critical strain and bulk modulus, are predicted. The thermal conductivity is also investigated using the NEP-based MD simulations. At room temperature, they exhibit extremely low thermal conductivity. The predicted results are compared with the experimental results, and the rationality of ML potentials has been confirmed.
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Affiliation(s)
- Yongbo Shi
- College of Physical Science and Technology, Bohai University, Jinzhou 121013, P. R. China.
| | - Yuanyuan Chen
- College of Physical Science and Technology, Bohai University, Jinzhou 121013, P. R. China.
| | - Haikuan Dong
- College of Physical Science and Technology, Bohai University, Jinzhou 121013, P. R. China.
| | - Hao Wang
- Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing, Beijing 100083, P. R. China
| | - Ping Qian
- Department of Physics, University of Science and Technology Beijing, Beijing 100083, P. R. China.
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Meguya R, Ng SH, Han M, Anand V, Katkus T, Vongsvivut J, Appadoo D, Nishijima Y, Juodkazis S, Morikawa J. Polariscopy with optical near-fields. NANOSCALE HORIZONS 2022; 7:1047-1053. [PMID: 35796230 DOI: 10.1039/d2nh00187j] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Polarisation analysis of light-matter interactions established for propagating optical far-fields is now extended into an evanescent field as demonstrated in this study using an attenuated total reflection (ATR) setup and a synchrotron source at THz frequencies. Scalar intensity E2, rather than a vector E-field, is used for absorbance analysis of the s- and p-components of the linearly polarised incident light. Absorption and phase changes induced by the sample and detected at the transmission port of the ATR accessory revealed previously non-accessible anisotropy in the absorption-dispersion properties of the sample probed by the evanescent optical near-field. Mapping of the sample's anisotropy perpendicular to its surface by the non-propagating light field is validated and the cos2 θ absorbance dependence was observed for the angle θ, where θ = 0° is aligned with the sample's surface. A four-polarisation method is presented for the absorbance mapping and a complimentary retardance spectrum is retrieved from the same measurement of the angular dependence of transmittance in structurally complex poly-hydroxybutyrate (PHB) and poly-L-lactic acid (PLLA) samples with amorphous and banded-spherulite (radially isotropic) crystalline regions. A possibility of all 3D mapping of anisotropy (polarisation tomography) is outlined.
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Affiliation(s)
- Ryu Meguya
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 3, 1-1-1 Umezono, Tsukuba 305-8563, Japan
| | - Soon Hock Ng
- Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
| | - Molong Han
- Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
| | - Vijayakumar Anand
- Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
- Institute of Physics, University of Tartu, 50411, Tartu, Estonia
| | - Tomas Katkus
- Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
| | - Jitraporn Vongsvivut
- Infrared Microspectroscopy (IRM) Beamline, ANSTO-Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Dominique Appadoo
- THz/Far-Infrared Beamline, ANSTO-Australian Synchrotron, 800 Blackburn Road, Clayton, Victoria 3168, Australia
| | - Yoshiaki Nishijima
- Department of Electrical and Computer Engineering, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Saulius Juodkazis
- Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
- WRH Program, International Research Frontiers Initiative (IRFI) Tokyo Institute of Technology, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
| | - Junko Morikawa
- WRH Program, International Research Frontiers Initiative (IRFI) Tokyo Institute of Technology, Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa 226-8503, Japan
- CREST - JST and School of Materials and Chemical Technology, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8550, Japan.
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