1
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Kalita D, Nandi P, Sahu P, Schoekel A, van Embden J, Topwal D, Manju U. Dynamic Structural Evolution and Dual Emission Behavior in Hybrid Organic Lead Bromide Perovskites. J Phys Chem Lett 2024; 15:2557-2565. [PMID: 38416012 DOI: 10.1021/acs.jpclett.4c00250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The optoelectronic properties of organic lead halide perovskites (OLHPs) strongly depend on their underlying crystal symmetry and dynamics. Here, we exploit temperature-dependent synchrotron powder X-ray diffraction and temperature-dependent photoluminescence to investigate how the subtle structural changes happening in the pure and mixed A-site cation MA1-xFAxPbBr3 (x = 0, 0.5, and 1) systems influences their optoelectronic properties. Diffraction investigations reveal a cubic structure at high temperatures and tetragonal and orthorhombic structures with octahedral distortion at low temperatures. Steady state photoluminescence and time correlated single photon counting study reveals that the dual emission behavior of these OLHPs is due to the direct-indirect band formation. In the orthorhombic phase of MAPbBr3, the indirect band is dominated by self-trapped exciton (STE) emission due to the higher-order lattice distortions of PbBr6 octahedra. Our findings provide a comprehensive explanation of the dual emission behavior of OLHPs while also providing a rationale for previous experimental observations.
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Affiliation(s)
- Dhiman Kalita
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Pronoy Nandi
- Department of Energy Science, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Puspanjali Sahu
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India
| | | | - Joel van Embden
- School of Science, RMIT University, Melbourne, VIC 3000, Australia
| | - Dinesh Topwal
- Institute of Physics, Bhubaneswar 751005, India
- Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400094, India
| | - Unnikrishnan Manju
- Materials Chemistry Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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2
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Kirstein E, Zhukov EA, Yakovlev DR, Kopteva NE, Yalcin E, Akimov IA, Hordiichuk O, Dirin DN, Kovalenko MV, Bayer M. Coherent Carrier Spin Dynamics in FAPbBr 3 Perovskite Crystals. J Phys Chem Lett 2024:2893-2903. [PMID: 38448798 DOI: 10.1021/acs.jpclett.4c00098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Coherent spin dynamics of electrons and holes are studied in hybrid organic-inorganic lead halide perovskite FAPbBr3 bulk single crystals using the time-resolved Kerr ellipticity technique at cryogenic temperatures. The Larmor spin precession of the carrier spins in a magnetic field is monitored to measure the Landé g-factors of electrons (+2.44) and holes (+0.41). These g-factors are highly isotropic. The measured spin dephasing times amount to a few nanoseconds, and the longitudinal hole spin relaxation time is 470 ns. The important role of the strong hyperfine interaction between carrier spins and nuclear spins is demonstrated via dynamic nuclear polarization. At low temperatures, electron and hole spin relaxation predominantly occurs via the hyperfine interaction, whose importance significantly decreases at temperatures above 12 K. We overview the spin dynamics in various lead halide perovskite crystals and polycrystalline films and conclude on their common features provided by charge carrier localization at cryogenic temperatures.
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Affiliation(s)
- Erik Kirstein
- Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Evgeny A Zhukov
- Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Dmitri R Yakovlev
- Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Nataliia E Kopteva
- Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Eyüp Yalcin
- Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Ilya A Akimov
- Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
| | - Oleh Hordiichuk
- Department of Chemistry and Applied Biosciences, Laboratory of Inorganic Chemistry, ETH Zürich, CH-8093 Zürich,Switzerland
- Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
| | - Dmitry N Dirin
- Department of Chemistry and Applied Biosciences, Laboratory of Inorganic Chemistry, ETH Zürich, CH-8093 Zürich,Switzerland
- Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
| | - Maksym V Kovalenko
- Department of Chemistry and Applied Biosciences, Laboratory of Inorganic Chemistry, ETH Zürich, CH-8093 Zürich,Switzerland
- Laboratory for Thin Films and Photovoltaics, Empa - Swiss Federal Laboratories for Materials Science and Technology, CH-8600 Dübendorf, Switzerland
| | - Manfred Bayer
- Experimentelle Physik 2, Technische Universität Dortmund, 44227 Dortmund, Germany
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3
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Muscarella LA, Jöbsis HJ, Baumgartner B, Prins PT, Maaskant DN, Petukhov AV, Chernyshov D, McMonagle CJ, Hutter EM. Which Ion Dominates the Temperature and Pressure Response of Halide Perovskites and Elpasolites? J Phys Chem Lett 2023; 14:9042-9051. [PMID: 37782281 PMCID: PMC10577787 DOI: 10.1021/acs.jpclett.3c02403] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Accepted: 09/27/2023] [Indexed: 10/03/2023]
Abstract
Halide perovskites and elpasolites are key for optoelectronic applications due to their exceptional performance and adaptability. However, understanding their crucial elastic properties for synthesis and device operation remains limited. We performed temperature- and pressure-dependent synchrotron-based powder X-ray diffraction at low pressures (ambient to 0.06 GPa) to investigate their elastic properties in their ambient-pressure crystal structure. We found common trends in bulk modulus and thermal expansivity, with an increased halide ionic radius (Cl to Br to I) resulting in greater softness, higher compressibility, and thermal expansivity in both materials. The A cation has a minor effect, and mixed-halide compositions show intermediate properties. Notably, thermal phase transitions in MAPbI3 and CsPbCl3 induced lattice softening and negative expansivity for specific crystal axes, even at temperatures far from the transition point. These results emphasize the significance of considering temperature-dependent elastic properties, which can significantly impact device stability and performance during manufacturing or temperature sweeps.
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Affiliation(s)
- Loreta A. Muscarella
- Inorganic
Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science
and Institute for Sustainable and Circular Chemistry, Department of
Chemistry, Utrecht University, Princetonlaan 8, 3584 CB Utrecht, The Netherlands
| | - Huygen J. Jöbsis
- Inorganic
Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science
and Institute for Sustainable and Circular Chemistry, Department of
Chemistry, Utrecht University, Princetonlaan 8, 3584 CB Utrecht, The Netherlands
| | - Bettina Baumgartner
- Inorganic
Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science
and Institute for Sustainable and Circular Chemistry, Department of
Chemistry, Utrecht University, Princetonlaan 8, 3584 CB Utrecht, The Netherlands
| | - P. Tim Prins
- Inorganic
Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science
and Institute for Sustainable and Circular Chemistry, Department of
Chemistry, Utrecht University, Princetonlaan 8, 3584 CB Utrecht, The Netherlands
| | - D. Nicolette Maaskant
- Inorganic
Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science
and Institute for Sustainable and Circular Chemistry, Department of
Chemistry, Utrecht University, Princetonlaan 8, 3584 CB Utrecht, The Netherlands
| | - Andrei V. Petukhov
- Physical
and Colloid Chemistry, Debye Institute for Nanomaterials Science,
Department of Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Dmitry Chernyshov
- Swiss−Norwegian
Beamlines, European Synchrotron Radiation
Facility, 71 Avenue des
Martyrs, 38000 Grenoble, France
| | - Charles J. McMonagle
- Swiss−Norwegian
Beamlines, European Synchrotron Radiation
Facility, 71 Avenue des
Martyrs, 38000 Grenoble, France
| | - Eline M. Hutter
- Inorganic
Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science
and Institute for Sustainable and Circular Chemistry, Department of
Chemistry, Utrecht University, Princetonlaan 8, 3584 CB Utrecht, The Netherlands
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4
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Higashimura C, Yumoto G, Yamada T, Nakamura T, Harata F, Hirori H, Wakamiya A, Kanemitsu Y. Spontaneous Polarization Induced Optical Responses in a Two-Dimensional Ferroelectric Halide Perovskite. J Phys Chem Lett 2023; 14:8360-8366. [PMID: 37703207 DOI: 10.1021/acs.jpclett.3c02238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2023]
Abstract
Two-dimensional (2D) halide perovskites exhibit unique structural and optical properties because large organic molecular cations distort the perovskite structure and the excitons confined in the 2D layers are stable. Here, we report the temperature dependences of the absorption spectra, second harmonic generation (SHG) intensity, and lattice constants of 2D perovskite (BA)2(EA)2Pb3I10 single crystals, where BA is n-butylammonium and EA is ethylammonium. We found that the Urbach tail of the absorption spectrum significantly changes at around 200 K and that the change is correlated with the SHG intensity and the in-plane lattice distortion. We concluded that a random distribution of spontaneous polarizations in the ferroelectric phase modifies the linewidth of the band-edge exciton transition and is the cause of the anomalous temperature dependence of the steepness parameter of the Urbach tail.
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Affiliation(s)
- Chika Higashimura
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Go Yumoto
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Takumi Yamada
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Tomoya Nakamura
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Fuyuki Harata
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Hideki Hirori
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Atsushi Wakamiya
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Yoshihiko Kanemitsu
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
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5
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Li L, Guo Z, Fan R, Zhou H. Anti-corrosion strategy to improve the stability of perovskite solar cells. NANOSCALE 2023; 15:8473-8490. [PMID: 37067337 DOI: 10.1039/d3nr00051f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
In recent years, perovskite solar cells (PSCs) have been considered as one of the most promising photovoltaic technologies due to their solution processing, cost effectiveness, and excellent performance. The highest certified power conversion efficiency (PCE) achieved to date is 25.8%, which is approaching the best PCE of 26.81% achieved for silicon-based cells. However, perovskite materials are susceptible to various aging stressors, such as humidity, oxygen, temperature, and electrical bias, which hinder the industrialization of perovskite photovoltaic technologies. In this review, we discuss the lifetime of PSCs from the perspective of corrosion science. On one hand, benefiting from a series of anti-corrosion strategies (passivation, surface coating, machining etc.) used in corrosion science, the stability of perovskite devices is remarkably enhanced; on the other hand, given that perovskites are soft crystal lattices, which are different from traditional metals, the revealed degradation processes and specific methods to improve device operation stability can be applied to the field of corrosion, which can enrich and expand corrosion science.
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Affiliation(s)
- Liang Li
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China.
| | - Zhenyu Guo
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China.
| | - Rundong Fan
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China.
| | - Huanping Zhou
- Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China.
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6
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Wu J, Chen J, Wang H. Phase Transition Kinetics of MAPbI 3 for Tetragonal-to-Orthorhombic Evolution. JACS AU 2023; 3:1205-1212. [PMID: 37124306 PMCID: PMC10131189 DOI: 10.1021/jacsau.3c00060] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 03/07/2023] [Accepted: 03/14/2023] [Indexed: 05/03/2023]
Abstract
Despite the commonly observed phase-instability-induced photovoltaic degradation of MAPbI3, the phase transition kinetics at the atomic level remains elusive. Herein, by developing a stepwise NEB method, we clarify a nonsynergistic minimum-energy pathway for the tetragonal-to-orthorhombic phase transition. It is kinetically driven by the tilting of PbI6 4- that induces a spontaneous small rotation of adjoining MA+ and ends with stepwise ∼110° reorientations of two nonadjacent MA+ enabled by the cavity expansion. Compared to the common concerted mechanism, this process gives a low barrier of 0.08 eV/unit, demonstrating the easiness of the transition at extremely low temperatures and the importance of rotational entropies in regulating transition at elevated temperatures. With an explicit phase transition mechanism, we explore the structure-induced property response and reveal that introducing even low content of large-sized organic cations could help maintain the quasi-stable low-temperature performance of MAPbI3 solar cells.
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7
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Wang S, Zhao Q, Hazarika A, Li S, Wu Y, Zhai Y, Chen X, Luther JM, Li G. Thermal tolerance of perovskite quantum dots dependent on A-site cation and surface ligand. Nat Commun 2023; 14:2216. [PMID: 37072445 PMCID: PMC10113222 DOI: 10.1038/s41467-023-37943-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 04/05/2023] [Indexed: 04/20/2023] Open
Abstract
A detailed picture of temperature dependent behavior of CsxFA1-xPbI3 perovskite quantum dots across the composition range is constructed by performing in situ optical spectroscopic and structural measurements, supported by theoretical calculations that focus on the relation between A-site chemical composition and surface ligand binding. The thermal degradation mechanism depends not only on the exact chemical composition, but also on the ligand binding energy. The thermal degradation of Cs-rich perovskite quantum dots is induced by a phase transition from black γ-phase to yellow δ-phase, while FA-rich perovskite quantum dots with higher ligand binding energy directly decompose into PbI2. Quantum dot growth to form large bulk size grain is observed for all CsxFA1-xPbI3 perovskite quantum dots at elevated temperatures. In addition, FA-rich quantum dots possess stronger electron-longitudinal optical phonon coupling, suggesting that photogenerated excitons in FA-rich quantum dots have higher probability to be dissociated by phonon scattering compared to Cs-rich quantum dots.
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Affiliation(s)
- Shuo Wang
- Institute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Qian Zhao
- Institute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin, 300350, China.
| | - Abhijit Hazarika
- Polymers and Functional Materials Division, CSIR-Indian Institute of Chemical Technology, Uppal Road, Tarnaka, Hyderabad, 500007, India
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - Simiao Li
- Institute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Yue Wu
- Institute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin, 300350, China
| | - Yaxin Zhai
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
- Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics, Hunan Normal University, Changsha, Hunan, 410081, China
| | - Xihan Chen
- SUSTech Energy Institute for Carbon Neutrality, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
| | - Joseph M Luther
- National Renewable Energy Laboratory, Golden, CO, 80401, USA
| | - Guoran Li
- Institute of New Energy Material Chemistry, School of Materials Science and Engineering, Nankai University, Tianjin, 300350, China.
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8
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Krajewska CJ, Kaplan AEK, Kick M, Berkinsky DB, Zhu H, Sverko T, Van Voorhis T, Bawendi MG. Controlled Assembly and Anomalous Thermal Expansion of Ultrathin Cesium Lead Bromide Nanoplatelets. NANO LETTERS 2023; 23:2148-2157. [PMID: 36884029 DOI: 10.1021/acs.nanolett.2c04526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Quantum confined lead halide perovskite nanoplatelets are anisotropic materials displaying strongly bound excitons with spectrally pure photoluminescence. We report the controlled assembly of CsPbBr3 nanoplatelets through varying the evaporation rate of the dispersion solvent. We confirm the assembly of superlattices in the face-down and edge-up configurations by electron microscopy, as well as X-ray scattering and diffraction. Polarization-resolved spectroscopy shows that superlattices in the edge-up configuration display significantly polarized emission compared to face-down counterparts. Variable-temperature X-ray diffraction of both face-down and edge-up superlattices uncovers a uniaxial negative thermal expansion in ultrathin nanoplatelets, which reconciles the anomalous temperature dependence of the emission energy. Additional structural aspects are investigated by multilayer diffraction fitting, revealing a significant decrease in superlattice order with decreasing temperature, with a concomitant expansion of the organic sublattice and increase of lead halide octahedral tilt.
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Affiliation(s)
- Chantalle J Krajewska
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Alexander E K Kaplan
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Matthias Kick
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - David B Berkinsky
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Hua Zhu
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Tara Sverko
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Troy Van Voorhis
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Moungi G Bawendi
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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9
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Zheng K, Liu C, Yu K, Meng Y, Yin X, Bu S, Lin S, Liu C, Ge Z. Approaching the Fill Factor Limit in Dopant-Free Hole Transporting Layer-Based All-Inorganic Perovskite Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 36897231 DOI: 10.1021/acsami.2c19954] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
As an important part of perovskite solar cells (PSCs), hole transporting layer (HTL) has a critical impact on the performance and stability of the devices. In an attempt to alleviate the moisture and thermal stability issues from the commonly used HTL Spiro-OMeTAD with dopant, it is urgent to develop novel HTLs with high stability. In this study, a new class of polymers D18 and D18-Cl are applied as undoped HTL for CsPbI2Br-based PSCs. In addition to the excellent hole transporting properties, we unveil that D18 and D18-Cl with larger thermal expansion coefficient than that of CsPbI2Br could impose a compressive stress onto the CsPbI2Br film upon thermal treatment, which could release the residual tensile stress in the film. As a result, the efficiency of CsPbI2Br-based PSCs with D18-Cl as HTL reaches 16.73%, and the fill factor (FF) exceeds 85%, which is one of the highest FF records for the conventional-structured device to date. The devices also show impressive thermal stability with over 80% of the initial PCE retained after 85 °C heating for 1500 h.
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Affiliation(s)
- Kanghui Zheng
- Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
- College of Materials Technology and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, P. R. China
| | - Chang Liu
- Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Kuibao Yu
- Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Yuanyuan Meng
- Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Xu Yin
- College of Materials Technology and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, P. R. China
| | - Shixiao Bu
- Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Shuyuan Lin
- Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
| | - Cuirong Liu
- College of Materials Technology and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, P. R. China
| | - Ziyi Ge
- Zhejiang Provincial Engineering Research Center of Energy Optoelectronic Materials and Devices, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo 315201, P. R. China
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10
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Reuveni G, Diskin-Posner Y, Gehrmann C, Godse S, Gkikas GG, Buchine I, Aharon S, Korobko R, Stoumpos CC, Egger DA, Yaffe O. Static and Dynamic Disorder in Formamidinium Lead Bromide Single Crystals. J Phys Chem Lett 2023; 14:1288-1293. [PMID: 36722023 PMCID: PMC9923750 DOI: 10.1021/acs.jpclett.2c03337] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 01/06/2023] [Indexed: 05/28/2023]
Abstract
We show that formamidinium-based crystals are distinct from methylammonium-based halide perovskite crystals because their inorganic sublattice exhibits intrinsic local static disorder that coexists with a well-defined average crystal structure. Our study combines terahertz-range Raman scattering with single-crystal X-ray diffraction and first-principles calculations to probe the evolution of inorganic sublattice dynamics with temperature in the range of 10-300 K. The temperature evolution of the Raman spectra shows that low-temperature, local static disorder strongly affects the crystal structural dynamics and phase transitions at higher temperatures.
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Affiliation(s)
- Guy Reuveni
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot76100, Israel
| | - Yael Diskin-Posner
- Chemical
Research Support, Weizmann Institute of
Science, Rehovot76100, Israel
| | - Christian Gehrmann
- Department
of Physics, Technical University of Munich, 85748Garching, Germany
| | - Shravan Godse
- Department
of Physics, Technical University of Munich, 85748Garching, Germany
| | - Giannis G. Gkikas
- Department
of Materials Science and Technology, University
of Crete, Voutes Campus, Heraklion, GR70013, Greece
| | - Isaac Buchine
- Department
of Chemistry and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan5290002, Israel
| | - Sigalit Aharon
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot76100, Israel
| | - Roman Korobko
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot76100, Israel
| | - Constantinos C. Stoumpos
- Department
of Materials Science and Technology, University
of Crete, Voutes Campus, Heraklion, GR70013, Greece
| | - David A. Egger
- Department
of Physics, Technical University of Munich, 85748Garching, Germany
| | - Omer Yaffe
- Department
of Chemical and Biological Physics, Weizmann
Institute of Science, Rehovot76100, Israel
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11
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Bhatia H, Martin C, Keshavarz M, Dovgaliuk I, Schrenker NJ, Ottesen M, Qiu W, Fron E, Bremholm M, Van de Vondel J, Bals S, Roeffaers MBJ, Hofkens J, Debroye E. Deciphering the Role of Water in Promoting the Optoelectronic Performance of Surface-Engineered Lead Halide Perovskite Nanocrystals. ACS APPLIED MATERIALS & INTERFACES 2023; 15:7294-7307. [PMID: 36705637 DOI: 10.1021/acsami.2c20605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Lead halide perovskites are promising candidates for high-performance light-emitting diodes (LEDs); however, their applicability is limited by their structural instability toward moisture. Although a deliberate addition of water to the precursor solution has recently been shown to improve the crystallinity and optical properties of perovskites, the corresponding thin films still do not exhibit a near-unity quantum yield. Herein, we report that the direct addition of a minute amount of water to post-treated formamidinium lead bromide (FAPbBr3) nanocrystals (NCs) substantially enhances the stability while achieving a 95% photoluminescence quantum yield in a NC thin film. We unveil the mechanism of how moisture assists in the formation of an additional NH4Br component. Alongside, we demonstrate the crucial role of moisture in assisting localized etching of the perovskite crystal, facilitating the partial incorporation of NH4+, which is key for improved performance under ambient conditions. Finally, as a proof-of-concept, the application of post-treated and water-treated perovskites is tested in LEDs, with the latter exhibiting a superior performance, offering opportunities toward commercial application in moisture-stable optoelectronics.
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Affiliation(s)
- Harshita Bhatia
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001Leuven, Belgium
| | - Cristina Martin
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001Leuven, Belgium
- Department of Physical Chemistry, Faculty of Pharmacy, University of Castilla-La Mancha, C/ José María Sánchez Ibañez s/n, 02071Albacete, Spain
| | - Masoumeh Keshavarz
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001Leuven, Belgium
| | - Iurii Dovgaliuk
- Institut des Matériaux Poreux de Paris, Ecole Normale Supérieure, ESPCI Paris, CNRS, PSL Université, 75005Paris, France
| | - Nadine J Schrenker
- Electron Microscopy for Materials Science (EMAT) and NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, B-2020Wilrijk, Belgium
| | - Martin Ottesen
- Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, 8000Aarhus C, Denmark
| | - Weiming Qiu
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001Leuven, Belgium
| | - Eduard Fron
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001Leuven, Belgium
| | - Martin Bremholm
- Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, 8000Aarhus C, Denmark
| | - Joris Van de Vondel
- Quantum Solid-State Physics (QSP), Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, Leuven3001, Belgium
| | - Sara Bals
- Electron Microscopy for Materials Science (EMAT) and NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, B-2020Wilrijk, Belgium
| | - Maarten B J Roeffaers
- cMACS, Department of Microbial and Molecular Systems, KU Leuven, 3001Leuven, Belgium
| | - Johan Hofkens
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001Leuven, Belgium
| | - Elke Debroye
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001Leuven, Belgium
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12
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Šimėnas M, Balčiu̅nas S, Ga̧gor A, Pienia̧żek A, Tolborg K, Kinka M, Klimavicius V, Svirskas Š, Kalendra V, Ptak M, Szewczyk D, Herman AP, Kudrawiec R, Sieradzki A, Grigalaitis R, Walsh A, Ma̧czka M, Banys J. Mixology of MA 1-x EA x PbI 3 Hybrid Perovskites: Phase Transitions, Cation Dynamics, and Photoluminescence. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2022; 34:10104-10112. [PMID: 36439319 PMCID: PMC9686138 DOI: 10.1021/acs.chemmater.2c02807] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Mixing molecular cations in hybrid lead halide perovskites is a highly effective approach to enhance the stability and performance of optoelectronic devices based on these compounds. In this work, we prepare and study novel mixed 3D methylammonium (MA)-ethylammonium (EA) MA1-x EA x PbI3 (x < 0.4) hybrid perovskites. We use a suite of different techniques to determine the structural phase diagram, cation dynamics, and photoluminescence properties of these compounds. Upon introduction of EA, we observe a gradual lowering of the phase-transition temperatures, indicating stabilization of the cubic phase. For mixing levels higher than 30%, we obtain a complete suppression of the low-temperature phase transition and formation of a new tetragonal phase with a different symmetry. We use broad-band dielectric spectroscopy to study the dielectric response of the mixed compounds in an extensive frequency range, which allows us to distinguish and characterize three distinct dipolar relaxation processes related to the molecular cation dynamics. We observe that mixing increases the rotation barrier of the MA cations and tunes the dielectric permittivity values. For the highest mixing levels, we observe the signatures of the dipolar glass phase formation. Our findings are supported by density functional theory calculations. Our photoluminescence measurements reveal a small change of the band gap upon mixing, indicating the suitability of these compounds for optoelectronic applications.
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Affiliation(s)
- Mantas Šimėnas
- Faculty
of Physics, Vilnius University, Sauletekio 3, LT-10257Vilnius, Lithuania
| | - Sergejus Balčiu̅nas
- Faculty
of Physics, Vilnius University, Sauletekio 3, LT-10257Vilnius, Lithuania
| | - Anna Ga̧gor
- Institute
of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422, PL-50-422Wroclaw, Poland
| | - Agnieszka Pienia̧żek
- Department
of Semiconductor Materials Engineering, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, PL-50-370Wroclaw, Poland
| | - Kasper Tolborg
- Thomas
Young Centre and Department of Materials, Imperial College London, SW7 2AZLondon, U.K.
| | - Martynas Kinka
- Faculty
of Physics, Vilnius University, Sauletekio 3, LT-10257Vilnius, Lithuania
| | - Vytautas Klimavicius
- Institute
of Chemical Physics, Vilnius University, Sauletekio 3, LT-10257Vilnius, Lithuania
| | - Šaru̅nas Svirskas
- Faculty
of Physics, Vilnius University, Sauletekio 3, LT-10257Vilnius, Lithuania
| | - Vidmantas Kalendra
- Faculty
of Physics, Vilnius University, Sauletekio 3, LT-10257Vilnius, Lithuania
| | - Maciej Ptak
- Institute
of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422, PL-50-422Wroclaw, Poland
| | - Daria Szewczyk
- Institute
of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422, PL-50-422Wroclaw, Poland
| | - Artur P. Herman
- Department
of Semiconductor Materials Engineering, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, PL-50-370Wroclaw, Poland
| | - Robert Kudrawiec
- Department
of Semiconductor Materials Engineering, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, PL-50-370Wroclaw, Poland
| | - Adam Sieradzki
- Department
of Experimental Physics, Wroclaw University
of Science and Technology, Wybrzeze Wyspianskiego 27, PL-50-370Wroclaw, Poland
| | - Robertas Grigalaitis
- Faculty
of Physics, Vilnius University, Sauletekio 3, LT-10257Vilnius, Lithuania
| | - Aron Walsh
- Thomas
Young Centre and Department of Materials, Imperial College London, SW7 2AZLondon, U.K.
| | - Mirosław Ma̧czka
- Institute
of Low Temperature and Structure Research, Polish Academy of Sciences, Okólna 2, 50-422, PL-50-422Wroclaw, Poland
| | - Ju̅ras Banys
- Faculty
of Physics, Vilnius University, Sauletekio 3, LT-10257Vilnius, Lithuania
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13
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He Y, Zheng K, Henry PF, Pullerits T, Chen J. Direct Observation of Size-Dependent Phase Transition in Methylammonium Lead Bromide Perovskite Microcrystals and Nanocrystals. ACS OMEGA 2022; 7:39970-39974. [PMID: 36385807 PMCID: PMC9648073 DOI: 10.1021/acsomega.2c04503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
Methylammonium (MA) lead halide perovskites have been widely studied as active materials for advanced optoelectronics. As crystalline semiconductor materials, their properties are strongly affected by their crystal structure. Depending on their applications, the size of MA lead halide perovskite crystals varies by several orders of magnitude. The particle size can lead to different structural phase transitions and optoelectronic properties. Herein, we investigate the size effect for phase transition of MA lead bromide (MAPbBr3) by comparing the temperature-dependent neutron powder diffraction patterns of microcrystals and nanocrystals. The orthorhombic-to-tetragonal phase transition occurs in MAPbBr3 microcrystals within the temperature range from 100 to 310 K. However, the phase transition is absent in nanocrystals in this temperature range. In this work, we offer a persuasive and direct evidence of the relationship between the particle size and the phase transition in perovskite crystals.
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Affiliation(s)
- Yanmei He
- Department
of Chemical Physics and NanoLund, Lund University, P.O. Box 124, 22100 Lund, Sweden
| | - Kaibo Zheng
- Department
of Chemical Physics and NanoLund, Lund University, P.O. Box 124, 22100 Lund, Sweden
- Department
of Chemistry, Technical University of Denmark, DK-2800 Kongens
Lyngby, Denmark
| | - Paul F. Henry
- ISIS
Pulsed Neutron Muon Facility, Rutherford
Appleton Laboratory, Harwell Campus, Didcot OX11 0QX, United Kingdom
| | - Tönu Pullerits
- Department
of Chemical Physics and NanoLund, Lund University, P.O. Box 124, 22100 Lund, Sweden
| | - Junsheng Chen
- Department
of Chemical Physics and NanoLund, Lund University, P.O. Box 124, 22100 Lund, Sweden
- Nano-Science
Center & Department of Chemistry, University
of Copenhagen, Universitetsparken
5, Copenhagen 2100, Denmark
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14
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Liu XY, Cui Y, Deng JP, Liu YY, Ma XF, Hou YX, Wei JY, Li ZQ, Wang ZW. Charge Carriers Trapping by the Full-Configuration Defects in Metal Halide Perovskites Quantum Dots. J Phys Chem Lett 2022; 13:8858-8863. [PMID: 36123602 DOI: 10.1021/acs.jpclett.2c02311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Metal halide perovskites quantum dots (MHPQDs) have aroused enormous interest in the photovoltaic and photoelectric disciplines because of their marvelous properties and size characteristics. However, one of the key problems of how to systematically analyze charge carriers trapped by defects is still a challenging task. Here, we study multiphonon processes of the charge carrier trapping by various defects in MHPQDs based on the well-known Huang-Rhys model, in which a method of a full-configuration defect, including different defect species with variable depth and lattice relaxation strength, is developed by introducing a localization parameter in the quantum defect model. With the help of this method, these fast trapping channels for charge carriers transferring from the quantum dot ground state to different defects are found. Furthermore, the dependence of the trapping time on the radius of quantum dot, the defect depth, and temperature is given. These results not only enrich the knowledge of charge carrier trapping processes by defects, but also bring light to the designs of MHPQDs-based photovoltaic and photoelectric devices.
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Affiliation(s)
- Xiao-Yi Liu
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin, 300354, China
| | - Yu Cui
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin, 300354, China
| | - Jia-Pei Deng
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin, 300354, China
| | - Yi-Yan Liu
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin, 300354, China
| | - Xu-Fei Ma
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin, 300354, China
| | - Yu-Xuan Hou
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin, 300354, China
| | - Jun-Ye Wei
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin, 300354, China
| | - Zhi-Qing Li
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin, 300354, China
| | - Zi-Wu Wang
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin, 300354, China
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15
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Bhatia H, Ghosh B, Debroye E. Colloidal FAPbBr 3 perovskite nanocrystals for light emission: what's going on? JOURNAL OF MATERIALS CHEMISTRY. C 2022; 10:13437-13461. [PMID: 36324302 PMCID: PMC9521414 DOI: 10.1039/d2tc01373h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 05/06/2022] [Indexed: 06/16/2023]
Abstract
Semiconducting nanomaterials have been widely explored in diverse optoelectronic applications. Colloidal lead halide perovskite nanocrystals (NCs) have recently been an excellent addition to the field of nanomaterials, promising an enticing building block in the field of light emission. In addition to the notable optoelectronic properties of perovskites, the colloidal NCs exhibit unique size-dependent optical properties due to the quantum size effect, which makes them highly attractive for light-emitting diodes (LEDs). In the past few years, perovskite-based LEDs (PeLEDs) have demonstrated a meteoritic rise in their external quantum efficiency (EQE) values, reaching over 20% so far. Among various halide perovskite compositions, FAPbBr3 and its variants remain one of the most interesting and sought-after compounds for green light emission. This review focuses on recent progress in the design and synthesis protocols of colloidal FAPbBr3 NCs and the emerging concepts in tailoring their surface chemistry. The structural and physicochemical features of lead halide perovskites along with a comprehensive discussion on their defect-tolerant properties are briefly outlined. Later, the prevalent synthesis, ligand, and compositional engineering strategies to boost the stability and photoluminescence quantum yield (PLQY) of FAPbBr3 NCs are extensively discussed. Finally, the fundamental concepts and recent progress on FAPbBr3-based LEDs, followed by a discussion of the challenges and prospects that are on the table for this enticing class of perovskites, are reviewed.
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Affiliation(s)
- Harshita Bhatia
- Department of Chemistry, KU Leuven Celestijnenlaan 200F B-3001 Leuven Belgium
| | - Biplab Ghosh
- cMACS, Department of Microbial and Molecular Systems, KU Leuven Celestijnenlaan 200F B-3001 Leuven Belgium
| | - Elke Debroye
- Department of Chemistry, KU Leuven Celestijnenlaan 200F B-3001 Leuven Belgium
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16
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Jin B, Liang F, Zhao D, Lu Y, Liu L, Liu F, Chen Z, Bi G, Wang P, Zhang Q, Qiu M. Suppression of Phase Transitions in Perovskite Thin Films through Cryogenic Electron Beam Irradiation. NANO LETTERS 2022; 22:7449-7456. [PMID: 36098785 DOI: 10.1021/acs.nanolett.2c02368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Organic-inorganic hybrid perovskites (OIHPs) with superior optoelectronic properties have emerged as revolutionary semiconductor materials for diverse applications. A fundamental understanding of the interplay between the microscopic molecular-level structure and the macroscopic optoelectronic properties is essential to boost device performance toward theoretical limits. Here, we reveal the critical role of CH3NH3+ (MA) in the regulation of the physicochemical and optoelectronic properties of a MAPbI3 film irradiated by an electron beam at 130 K. The order-to-disorder transformation of the MA cation not only leads to a notably enhanced photoluminescence emission but also results in the suppression of the orthorhombic phase down to 85 K. Taking advantage of the regulation of MA cation dynamics, we demonstrate a perovskite photodetector with 100% photocurrent enhancement and long-term stability exceeding one month. Our study provides a powerful tool for regulating the optoelectronic properties and stabilities of perovskites and highlights potential opportunities related to the organic cation in OIHPs.
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Affiliation(s)
- Binbin Jin
- Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, Zhejiang 310024, China
- School of Information and Electrical Engineering, Zhejiang University City College, Hangzhou, Zhejiang 310015, China
- Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, Zhejiang 310024, China
| | - Fei Liang
- State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China
| | - Ding Zhao
- Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, Zhejiang 310024, China
- Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, Zhejiang 310024, China
| | - Yihan Lu
- Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, Zhejiang 310024, China
- Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, Zhejiang 310024, China
| | - Lufang Liu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Fengjiang Liu
- Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, Zhejiang 310024, China
- Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, Zhejiang 310024, China
| | - Zhong Chen
- Instrumentation and Service Center for Molecular Sciences, School of Science, Westlake University, Hangzhou, Zhejiang 310024, China
| | - Gang Bi
- School of Information and Electrical Engineering, Zhejiang University City College, Hangzhou, Zhejiang 310015, China
| | - Pan Wang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Qing Zhang
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Min Qiu
- Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, Zhejiang 310024, China
- Institute of Advanced Technology, Westlake Institute for Advanced Study, Hangzhou, Zhejiang 310024, China
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17
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Zhao F, Ren A, Li P, Li Y, Wu J, Wang ZM. Toward Continuous-Wave Pumped Metal Halide Perovskite Lasers: Strategies and Challenges. ACS NANO 2022; 16:7116-7143. [PMID: 35511058 DOI: 10.1021/acsnano.1c11539] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Reliable and efficient continuous-wave (CW) lasers have been intensively pursued in the field of optoelectronic integrated circuits. Metal perovskites have emerged as promising gain materials for solution-processed laser diodes. Recently, the performance of CW perovskite lasers has been improved with the optimization of material and device levels. Nevertheless, the realization of CW pumped perovskite lasers is still hampered by thermal runaway, unwanted parasitic species, and poor long-term stability. This review starts with the charge carrier recombination dynamics and fundamentals of CW lasing in perovskites. We examine the potential strategies that can be used to improve the performance of perovskite CW lasers from the materials to device levels. We also propose the open challenges and future opportunities in developing high-performance and stable CW pumped perovskite lasers.
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Affiliation(s)
- Feiyun Zhao
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Aobo Ren
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Peihang Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Yan Li
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Jiang Wu
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, PR China
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, PR China
| | - Zhiming M Wang
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, PR China
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18
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Tang X, Zhang Y, Kothalawala NL, Wen X, Kim DY, Yang F. MAPbBr 3nanocrystals from aqueous solution for poly(methyl methacrylate)-MAPbBr 3nanocrystal films with compression-resistant photoluminescence. NANOTECHNOLOGY 2022; 33:235605. [PMID: 35235922 DOI: 10.1088/1361-6528/ac59e8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
In this work, we develop an environmental-friendly approach to produce organic-inorganic hybrid MAPbBr3(MA = CH3NH3) perovskite nanocrystals (PeNCs) and PMMA-MAPbBr3NC films with excellent compression-resistant PL characteristics. Deionized water is used as the solvent to synthesize MAPbBr3powder instead of conventionally-used hazardous organic solvents. The MAPbBr3PeNCs derived from the MAPbBr3powder exhibit a high photoluminescence quantum yield (PLQY) of 93.86%. Poly(methyl methacrylate) (PMMA)-MAPbBr3NC films made from the MAPbBr3PeNCs retain ∼97% and ∼91% of initial PL intensity after 720 h aging in ambient environment at 50 °C and 70 °C, respectively. The PMMA-MAPbBr3NC films also exhibit compression-resistant photoluminescent characteristics in contrast to the PMMA-CsPbBr3NC films under a compressive stress of 1.6 MPa. The PMMA-MAPbBr3NC film integrated with a red emissive film and a blue light emitting source achieves an LCD backlight of ∼114% color gamut of National Television System Committee (NTSC) 1953 standard.
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Affiliation(s)
- Xiaobing Tang
- Materials Program, Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, United States of America
| | - Yulin Zhang
- Materials Program, Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, United States of America
| | | | - Xiyu Wen
- Center for Aluminum Technology, University of Kentucky, Lexington, KY 40506, United States of America
| | - Doo Young Kim
- Department of Chemistry, University of Kentucky, Lexington, KY 40506, United States of America
| | - Fuqian Yang
- Materials Program, Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, United States of America
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19
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Abstract
Photoinduced halide segregation in mixed halide perovskites is an intriguing phenomenon and simultaneously a stability issue. In-depth probing this effect and unveiling the underpinning mechanisms are of great interest and significance. This article reviews the progress in visualized investigation of halide segregation, especially light-induced, by means of spatially-resolved imaging techniques. Furthermore, the current understanding of photoinduced phase separation based on several possible mechanisms is summarized and discussed. Finally, the remained open questions and future outlook in this field are outlined.
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20
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Ray A, Martín-García B, Moliterni A, Casati N, Boopathi KM, Spirito D, Goldoni L, Prato M, Giacobbe C, Giannini C, Di Stasio F, Krahne R, Manna L, Abdelhady AL. Mixed Dimethylammonium/Methylammonium Lead Halide Perovskite Crystals for Improved Structural Stability and Enhanced Photodetection. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2106160. [PMID: 34856033 DOI: 10.1002/adma.202106160] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 11/24/2021] [Indexed: 06/13/2023]
Abstract
The solvent acidolysis crystallization technique is utilized to grow mixed dimethylammonium/methylammonium lead tribromide (DMA/MAPbBr3 ) crystals reaching the highest dimethylammonium incorporation of 44% while maintaining the 3D cubic perovskite phase. These mixed perovskite crystals show suppression of the orthorhombic phase and a lower tetragonal-to-cubic phase-transition temperature compared to MAPbBr3 . A distinct behavior is observed in the temperature-dependent photoluminescence properties of MAPbBr3 and mixed DMA/MAPbBr3 crystals due to the different organic cation dynamics governing the phase transition(s). Furthermore, lateral photodetectors based on these crystals show that, at room temperature, the mixed crystals possess higher detectivity compared to MAPbBr3 crystals caused by structural compression and reduced surface trap density. Remarkably, the mixed-crystal devices exhibit large enhancement in their detectivity below the phase-transition temperature (at 200 K), while for the MAPbBr3 devices only insignificant changes are observed. The high detectivity of the mixed crystals makes them attractive for visible-light communication and for space applications. The results highlight the importance of the synthetic technique for compositional engineering of halide perovskites that governs their structural and optoelectronic properties.
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Affiliation(s)
- Aniruddha Ray
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
- Dipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, Genoa, 16146, Italy
| | - Beatriz Martín-García
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
- CIC nanoGUNE, Tolosa Hiribidea, 76, Donostia-San Sebastian, 20018, Spain
| | - Anna Moliterni
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Via Amendola 122/O, Bari, 70126, Italy
| | - Nicola Casati
- Laboratory for Synchrotron Radiation-Condensed Matter, Paul Scherrer Institut, Villigen, 5232, Switzerland
| | | | - Davide Spirito
- IHP-Leibniz-Institut für innovative Mikroelektronik, Im Technologiepark 25, Frankfurt (Oder), D-15236, Germany
| | - Luca Goldoni
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
| | - Mirko Prato
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
| | - Carlotta Giacobbe
- European Synchrotron Radiation Facility, 71 Avenue Des Martyrs, Grenoble, 38040, France
| | - Cinzia Giannini
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, Via Amendola 122/O, Bari, 70126, Italy
| | | | - Roman Krahne
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
| | - Liberato Manna
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
| | - Ahmed L Abdelhady
- Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy
- ŁUKASIEWICZ Research Network PORT-Polish Center for Technology Development, ul. Stabłowicka 147, Wrocław, 54066, Poland
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21
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Thermodynamic Study of Formamidinium Lead Iodide (CH5N2PbI3) from 5 to 357 K. ENTROPY 2022; 24:e24020145. [PMID: 35205441 PMCID: PMC8871434 DOI: 10.3390/e24020145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 01/13/2022] [Accepted: 01/14/2022] [Indexed: 11/16/2022]
Abstract
In the present study, the molar heat capacity of solid formamidinium lead iodide (CH5N2PbI3) was measured over the temperature range from 5 to 357 K using a precise automated adiabatic calorimeter. In the above temperature interval, three distinct phase transitions were found in ranges from 49 to 56 K, from 110 to 178 K, and from 264 to 277 K. The standard thermodynamic functions of the studied perovskite, namely the heat capacity C°p(T), enthalpy [H0(T) − H0(0)], entropy S0(T), and [G°(T) − H°(0)]/T, were calculated for the temperature range from 0 to 345 K based on the experimental data. Herein, the results are discussed and compared with those available in the literature as measured by nonclassical methods.
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22
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Zhang X, Guo Z, Li R, Yu J, Yuan B, Chen B, He T, Chen R. Quasi-Type II Core-Shell Perovskite Nanocrystals for Improved Structural Stability and Optical Gain. ACS APPLIED MATERIALS & INTERFACES 2021; 13:58170-58178. [PMID: 34818892 DOI: 10.1021/acsami.1c18025] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In recent years, core-shell lead halide perovskite nanocrystals (PeNCs) and their devices have attracted intensive attention owing to nearly perfect optoelectronic properties. However, the complex photophysical mechanism among them is still unclear. Herein, monodispersed core-shell PeNCs coated with an all-inorganic cesium lead bromide (CsPbBr3) shell epitaxially grown on the surface of formamidinium lead bromide (FAPbBr3) PeNCs were synthesized. Through power- and temperature-dependent photoluminescence (PL) measurements, it is found that the electronic structure of the core-shell FAPbBr3/CsPbBr3 PeNCs has a quasi-type II band alignment. The presence of Cs+ in the shell limits ion migration and helps to stabilize structural and optical properties. On this basis, after being exposed to pulsed nanosecond laser for a period, an amplified spontaneous emission (ASE) can be observed, which is attributed to the effective passivation induced by laser irradiation on defects at the interface. The ASE threshold of the core-shell PeNCs showing high structural and optical stability is 447 nJ/cm2 under pulsed nanosecond optical pumping. The results that are demonstrated here provide a new idea and perspective for improving the stability of perovskite and can be of practical interest for the utilization of the core-shell PeNCs in optoelectronic devices.
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Affiliation(s)
- Xuanyu Zhang
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Zhihang Guo
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Ruxue Li
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
- School of Electrical and Information Engineering, Guangxi University of Science and Technology, Liuzhou 545006, Guangxi, China
| | - Jiahao Yu
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Baozhen Yuan
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
| | - Baian Chen
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong SAR, China
| | - Tingchao He
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Rui Chen
- Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen 518055, China
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23
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Stereochemical expression of ns2 electron pairs in metal halide perovskites. Nat Rev Chem 2021; 5:838-852. [PMID: 37117392 DOI: 10.1038/s41570-021-00335-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/07/2021] [Indexed: 12/20/2022]
Abstract
Metal halide perovskites (MHPs) are characterized as strongly anharmonic and dynamic lattices. While there is a consensus on the solvation-like polarization effect in these materials, whether static polarization, that is, ferroelectricity, exists or not in 3D MHPs remains controversial. In this Review, we resolve this controversy by analysing the stereochemical expression (SE) of the ns2 electron pair (NSEP) on group IV metal cations. The SE-NSEP is key to lattice instability, which governs the breaking of inversion symmetry and induces ferroelectricity. The SE-NSEP is diminishingly small in commonly studied 3D lead iodide or bromide perovskites, indicating an absence of ferroelectricity. In contrast, 2D MHPs promote the SE-NSEP and produce unambiguous ferroelectricity or antiferroelectricity. Irrespective of ferroelectricity, the dynamic manifestation of the SE-NSEP provides the missing link to understanding polar fluctuations and efficient dielectric screening in MHPs, thus, contributing to the long carrier lifetimes and diffusion lengths.
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24
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Cui Y, Liu XY, Ji SY, Sun Y, Deng JP, Ma XF, Li ZQ, Wang ZW. Energy Resonance Transfer between Quantum Defects in Metal Halide Perovskites. J Phys Chem Lett 2021; 12:11182-11190. [PMID: 34761944 DOI: 10.1021/acs.jpclett.1c02965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Quantum defects have been shown to play an essential role in nonradiative recombination in metal halide perovskites (MHPs). Nonetheless, the processes of charge transfer assisted by defects are still ambiguous. Herein, we theoretically study the nonradiative multiphonon processes among different types of quantum defects in MHPs using Markvart's model for the induced mechanisms of electron-electron and electron-phonon interactions. We find that the charge carrier can transfer between the neighboring levels of the same type of shallow defects by multiphonon processes, but it will be distinctly suppressed with an increase in the defect depth. For the nonradiation multiphonon transitions between donor- and acceptor-like defects, the processes are very fast and not sensitive to the defect depth, which provides a possible explanation for the phenomenon of blinking of photoluminescence spectra. We also discuss the temperature dependence of these multiphonon processes and find that their variational trends depend on the comparison of the Huang-Rhys factor with the emitted phonon number. These theoretical results not only fill some of the gaps in defect-assisted nonradiative processes in the perovskite materials but also provide deeper physical insights into producing higher-performance perovskite-based devices.
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Affiliation(s)
- Yu Cui
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, China
| | - Xiao-Yi Liu
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, China
| | - Shi-Yuan Ji
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, China
| | - Yong Sun
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, China
| | - Jia-Pei Deng
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, China
| | - Xu-Fei Ma
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, China
| | - Zhi-Qing Li
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, China
| | - Zi-Wu Wang
- Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, School of Science, Tianjin University, Tianjin 300354, China
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25
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Yu SK, Zhang ZR, Ren ZH, Zhai HL, Zhu QY, Dai J. 2D Lead Iodide Perovskite with Mercaptan-Containing Amine and Its Exceptional Water Stability. Inorg Chem 2021; 60:9132-9140. [PMID: 34081433 DOI: 10.1021/acs.inorgchem.1c01106] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two dimensional (2D) hybrid perovskites have attracted a great deal of interest because of their appropriate photovoltaic efficiency and environmental stability. Although some 2D hybrid perovskites with sulfur-containing amines have been reported, the cation having the mercaptan group has not been well explored yet. In this work, cysteamine (Cya, HS(CH2)2NH2), a mercaptan-containing amine, was introduced into 2D hybrid perovskite. Two 2D lead iodides with different structures, (HCya)2PbI4 (1) and (HCya)7Pb4I15 (2), were isolated as a red low-temperature phase and a yellow high-temperature phase, respectively. X-ray single-crystal structural analysis showed that the red phase 1 is a single layered corner-shared perovskite and that the yellow phase 2 is a corner/edge-shared quasi-2D perovskite. A thermo-induced reversible 1 to 2 phase transition was found in this synthetic system. The configuration of HCya cation greatly influences the crystallization equilibrium, generating different structures of the lead halides. The single-crystal structure of 1 is discussed in comparison with that of (HAE)2PbI4 (AE = HO(CH2)2NH2), an analogue of 1. The different effects of OH and SH groups on the 2D frameworks are studied based on their hydrogen bonding properties. More remarkably, although the two perovskites have similar structures, the (HCya)2PbI4 (1) has an intrinsic water stability that is much more stable than (HAE)2PbI4, which should be attributed to the affinity of the SH group with lead on the surface of the lead halide.
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Affiliation(s)
- Shuai-Kang Yu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Zhi-Ruo Zhang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Zhou-Hong Ren
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Hang-Ling Zhai
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Qin-Yu Zhu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Jie Dai
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
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26
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Chen Z, Brocks G, Tao S, Bobbert PA. Unified theory for light-induced halide segregation in mixed halide perovskites. Nat Commun 2021; 12:2687. [PMID: 33976203 PMCID: PMC8113520 DOI: 10.1038/s41467-021-23008-z] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 04/08/2021] [Indexed: 02/03/2023] Open
Abstract
Mixed halide perovskites that are thermodynamically stable in the dark demix under illumination. This is problematic for their application in solar cells. We present a unified thermodynamic theory for this light-induced halide segregation that is based on a free energy lowering of photocarriers funnelling to a nucleated phase with different halide composition and lower band gap than the parent phase. We apply the theory to a sequence of mixed iodine-bromine perovskites. The spinodals separating metastable and unstable regions in the composition-temperature phase diagrams only slightly change under illumination, while light-induced binodals separating stable and metastable regions appear signalling the nucleation of a low-band gap iodine-rich phase. We find that the threshold photocarrier density for halide segregation is governed by the band gap difference of the parent and iodine-rich phase. Partial replacement of organic cations by cesium reduces this difference and therefore has a stabilizing effect.
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Affiliation(s)
- Zehua Chen
- grid.6852.90000 0004 0398 8763Materials Simulation and Modelling, Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands ,grid.6852.90000 0004 0398 8763Center for Computational Energy Research, Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Geert Brocks
- grid.6852.90000 0004 0398 8763Materials Simulation and Modelling, Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands ,grid.6852.90000 0004 0398 8763Center for Computational Energy Research, Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands ,grid.6214.10000 0004 0399 8953Computational Materials Science, Faculty of Science and Technology and MESA+ Institute for Nanotechnology, University of Twente, Enschede, The Netherlands
| | - Shuxia Tao
- grid.6852.90000 0004 0398 8763Materials Simulation and Modelling, Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands ,grid.6852.90000 0004 0398 8763Center for Computational Energy Research, Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Peter A. Bobbert
- grid.6852.90000 0004 0398 8763Center for Computational Energy Research, Department of Applied Physics, Eindhoven University of Technology, Eindhoven, The Netherlands ,grid.6852.90000 0004 0398 8763Molecular Materials and Nanosystems, Eindhoven University of Technology, Eindhoven, The Netherlands
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27
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He Y, Yan J, Xu L, Zhang B, Cheng Q, Cao Y, Zhang J, Tao C, Wei Y, Wen K, Kuang Z, Chow GM, Shen Z, Peng Q, Huang W, Wang J. Perovskite Light-Emitting Diodes with Near Unit Internal Quantum Efficiency at Low Temperatures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2021; 33:e2006302. [PMID: 33656775 DOI: 10.1002/adma.202006302] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 12/03/2020] [Indexed: 06/12/2023]
Abstract
Room-temperature-high-efficiency light-emitting diodes based on metal halide perovskite FAPbI3 are shown to be able to work perfectly at low temperatures. A peak external quantum efficiency (EQE) of 32.8%, corresponding to an internal quantum efficiency of 100%, is achieved at 45 K. Importantly, the devices show almost no degradation after working at a constant current density of 200 mA m-2 for 330 h. The enhanced EQEs at low temperatures result from the increased photoluminescence quantum efficiencies of the perovskite, which is caused by the increased radiative recombination rate. Spectroscopic and calculation results suggest that the phase transitions of the FAPbI3 play an important role for the enhancement of exciton binding energy, which increases the recombination rate.
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Affiliation(s)
- Yarong He
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Jiaxu Yan
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Lei Xu
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Bangmin Zhang
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117575, Singapore
| | - Qian Cheng
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Yu Cao
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Ju Zhang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Cong Tao
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Yingqiang Wei
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Kaichuan Wen
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Zhiyuan Kuang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Gan Moog Chow
- Department of Materials Science and Engineering, National University of Singapore, Singapore, 117575, Singapore
| | - Zexiang Shen
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Qiming Peng
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
| | - Wei Huang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
- Frontiers Science Center for Flexible Electronics (FSCFE), Shaanxi Institute of Flexible Electronics (SIFE) and Shaanxi Institute of Biomedical Materials and Engineering (SIBME), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, China
| | - Jianpu Wang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, China
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28
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Pipitone C, Giannici F, Martorana A, Bertolotti F, Calabrese G, Milita S, Guagliardi A, Masciocchi N. Proton sponge lead halides containing 1D polyoctahedral chains. CrystEngComm 2021. [DOI: 10.1039/d0ce01695k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hybrid organic/inorganic lead halides with the proton sponge moiety show face-sharing [PbX6] octahedra forming linear 1D chains. These species exhibit complete (Br, I) miscibility and exceptional anisotropic thermal expansion.
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Affiliation(s)
- Candida Pipitone
- Dipartimento di Fisica e Chimica
- Università di Palermo
- 90128 Palermo
- Italy
| | | | | | - Federica Bertolotti
- Dipartimento di Scienza e Alta Tecnologia e To.Sca.Lab
- Università dell'Insubria
- 22100 Como
- Italy
| | - Gabriele Calabrese
- Istituto per la Microelettronica e Microsistemi
- Consiglio Nazionale delle Ricerche
- 40129 Bologna
- Italy
| | - Silvia Milita
- Istituto per la Microelettronica e Microsistemi
- Consiglio Nazionale delle Ricerche
- 40129 Bologna
- Italy
| | - Antonietta Guagliardi
- Istituto di Cristallografia e To.Sca.Lab
- Consiglio Nazionale delle Ricerche
- 22100 Como
- Italy
| | - Norberto Masciocchi
- Dipartimento di Scienza e Alta Tecnologia e To.Sca.Lab
- Università dell'Insubria
- 22100 Como
- Italy
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29
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Handa T, Yamada T, Nagai M, Kanemitsu Y. Phonon, thermal, and thermo-optical properties of halide perovskites. Phys Chem Chem Phys 2020; 22:26069-26087. [PMID: 33174887 DOI: 10.1039/d0cp04426a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Metal halide perovskites are semiconductors with many fascinating characteristics and their widespread use in optoelectronic devices has been expected. High-quality thin films and single crystals can be fabricated by simple chemical solution processes and their fundamental electrical, optical, and thermal properties can be changed significantly by compositional substitution, in particular halogen ions. In this perspective, we provide an overview of phonon and thermal properties of metal halide perovskites, which play a decisive role in determining device performance. After a brief introduction to fundamental material properties, longitudinal-optical phonons and unusual thermal properties of metal halide perovskites are discussed. Remarkably, they possess very low thermal conductivities and very large thermal expansion coefficients despite their crystalline nature. In line with these discussions, we present optical properties governed by the strong electron-phonon interactions and the unusual thermal properties. By showing their unique thermo-optic responses and novel application examples, we highlight some aspects of the unusual thermal properties.
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Affiliation(s)
- Taketo Handa
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
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30
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Sharma VK, Mukhopadhyay R, Mohanty A, Tyagi M, Embs JP, Sarma DD. Contrasting Behaviors of FA and MA Cations in APbBr 3. J Phys Chem Lett 2020; 11:9669-9679. [PMID: 33135903 DOI: 10.1021/acs.jpclett.0c02688] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
It is known that the organic units in hybrid halide perovskites are free to rotate, but it is not clear if this freedom is of any relevance to the structure-property relationship of these compounds. We have employed quasi-elastic neutron scattering using two different spectrometers, thus providing a wide dynamic range to investigate the cation dynamics in methylammonium lead bromide (MAPbBr3) and formamidinium lead bromide (FAPbBr3) over a large temperature range covering all known crystallographic phases of these two compounds. Our results establish a plastic crystal-like phase forming above 30 K within the orthorhombic phase of MAPbBr3 related to 3-fold rotations of MA units around the C-N axis with an activation energy, Ea, of ∼27 meV, which has no counterpart in the FA compound. MA exhibits an additional 4-fold orientational motion of the whole molecule via rotation of the C-N axis itself with an Ea of ∼68 meV common for the high-temperature tetragonal and cubic phases. In contrast, the FA compound exhibits only an isotropic orientational motion of the whole FA unit with Ea ≈ 106 meV within the orthorhombic phase and a substantially reduced common Ea of ∼62 meV for the high-temperature tetragonal and cubic phases. Our results suggest that the rotational dynamics of the organic units, crystallographic phases, and physical properties of these compounds are intimately connected.
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Affiliation(s)
- V K Sharma
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - R Mukhopadhyay
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India
| | - A Mohanty
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bengaluru 560012, India
| | - M Tyagi
- National Institute of Standards and Technology, Center for Neutron Research, Gaithersburg, Maryland 20899, United States
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20742, United States
| | - J P Embs
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland
| | - D D Sarma
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bengaluru 560012, India
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31
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Wang J, Zhang T, Zhang ZX, Su CY, Zhang Y, Fu DW. Methylation Design Strategy to Trigger a Dual Dielectric Switch and Improve the Phase Transition Temperature. Inorg Chem 2020; 59:16635-16643. [PMID: 33103433 DOI: 10.1021/acs.inorgchem.0c02558] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Phase transitions of hybrid materials have aroused widespread concern and call for an in-depth study on its structure design, because the structure and characteristics are closely related, which promote potential applications in the field of temperature sensors, dielectric switches, and actuators. However, designing materials with multiple phase transitions and a high phase transition temperature (Tr) remains a huge challenge. In order to deal with this key hurdle, we tried to regulate the structural components and successfully synthesized [MASD]2[CdCl4] (1, MASD = 8-methyl-5-azoniaspiro[4,5]decane), which displays multiple phase transitions occurring at 273.8 K and 395.9 K separately. The Tr has significantly increased compared with the parent compounds reported previously. As the temperature sensitivity of compound 1 is constant at different frequencies, it can be applied for detectors or sensors under frequency-independent or wide frequency conditions. Moreover, methylation design strategy evidently triggered the dual dielectric switch and improved the Tr, which opens a new path for finding and adjusting ideal materials of multiple phase transition.
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Affiliation(s)
- Jia Wang
- Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P.R. China.,Institute for Science and Applications of Molecular Ferroelectrics, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, P.R. China
| | - Tie Zhang
- Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P.R. China
| | - Zhi-Xu Zhang
- Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P.R. China
| | - Chang-Yuan Su
- Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P.R. China
| | - Yi Zhang
- Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, P.R. China
| | - Da-Wei Fu
- Institute for Science and Applications of Molecular Ferroelectrics, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, P.R. China
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32
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Reversible multicolor chromism in layered formamidinium metal halide perovskites. Nat Commun 2020; 11:5234. [PMID: 33067460 PMCID: PMC7568568 DOI: 10.1038/s41467-020-19009-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Accepted: 09/23/2020] [Indexed: 11/09/2022] Open
Abstract
Metal halide perovskites feature crystalline-like electronic band structures and liquid-like physical properties. The crystal–liquid duality enables optoelectronic devices with unprecedented performance and a unique opportunity to chemically manipulate the structure with low energy input. In this work, we leverage the low formation energy of metal halide perovskites to demonstrate multicolor reversible chromism. We synthesized layered Ruddlesden-Popper FAn+1PbnX3n+1 (FA = formamidinium, X = I, Br; n = number of layers = 1, 2, 3 … ∞) and reversibly tune the dimensionality (n) by modulating the strength and number of H-bonds in the system. H-bonding was controlled by exposure to solvent vapor (solvatochromism) or temperature change (thermochromism), which shuttles FAX salt pairs between the FAn+1PbnX3n+1 domains and adjacent FAX “reservoir” domains. Unlike traditional chromic materials that only offer a single-color transition, FAn+1PbnX3n+1 films reversibly switch between multiple colors including yellow, orange, red, brown, and white/colorless. Each colored phase exhibits distinct optoelectronic properties characteristic of 2D superlattice materials with tunable quantum well thickness. Metal halide perovskites feature crystalline-like electronic band structures and liquid-like physical properties that allow chemical manipulation of the structure with low energy input. Here, the authors leverage the low formation energy of 2D metal halide perovskites to demonstrate films that reversibly switch between multiple colors using tunable quantum well thickness.
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33
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Keshavarz M, Debroye E, Ottesen M, Martin C, Zhang H, Fron E, Küchler R, Steele JA, Bremholm M, Van de Vondel J, Wang HI, Bonn M, Roeffaers MBJ, Wiedmann S, Hofkens J. Tuning the Structural and Optoelectronic Properties of Cs 2 AgBiBr 6 Double-Perovskite Single Crystals through Alkali-Metal Substitution. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001878. [PMID: 32864757 DOI: 10.1002/adma.202001878] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 07/12/2020] [Indexed: 05/25/2023]
Abstract
Lead-free double perovskites have great potential as stable and nontoxic optoelectronic materials. Recently, Cs2 AgBiBr6 has emerged as a promising material, with suboptimal photon-to-charge carrier conversion efficiency, yet well suited for high-energy photon-detection applications. Here, the optoelectronic and structural properties of pure Cs2 AgBiBr6 and alkali-metal-substituted (Cs1- x Yx )2 AgBiBr6 (Y: Rb+ , K+ , Na+ ; x = 0.02) single crystals are investigated. Strikingly, alkali-substitution entails a tunability to the material system in its response to X-rays and structural properties that is most strongly revealed in Rb-substituted compounds whose X-ray sensitivity outperforms other double-perovskite-based devices reported. While the fundamental nature and magnitude of the bandgap remains unchanged, the alkali-substituted materials exhibit a threefold boost in their fundamental carrier recombination lifetime at room temperature. Moreover, an enhanced electron-acoustic phonon scattering is found compared to Cs2 AgBiBr6 . The study thus paves the way for employing cation substitution to tune the properties of double perovskites toward a new material platform for optoelectronics.
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Affiliation(s)
- Masoumeh Keshavarz
- Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Elke Debroye
- Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Martin Ottesen
- Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus C, 8000, Denmark
| | - Cristina Martin
- Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
- Departamento de Química Física, Facultad de Farmacia de Albacete, UCLM, Albacete, 02071, Spain
| | - Heng Zhang
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz, 55128, Germany
| | - Eduard Fron
- Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Robert Küchler
- Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Str. 40, Dresden, 01187, Germany
| | - Julian A Steele
- cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Martin Bremholm
- Department of Chemistry and iNANO, Aarhus University, Langelandsgade 140, Aarhus C, 8000, Denmark
| | - Joris Van de Vondel
- Quantum Solid-State Physics (QSP), Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, Leuven, 3001, Belgium
| | - Hai I Wang
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz, 55128, Germany
| | - Mischa Bonn
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz, 55128, Germany
| | - Maarten B J Roeffaers
- cMACS, Department of Microbial and Molecular Systems, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Steffen Wiedmann
- High Field Magnet Laboratory and Institute for Molecules and Materials, Radboud University, Toernooiveld 7, Nijmegen, 6525 ED, Netherlands
| | - Johan Hofkens
- Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
- Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz, 55128, Germany
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34
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Mannino G, Deretzis I, Smecca E, La Magna A, Alberti A, Ceratti D, Cahen D. Temperature-Dependent Optical Band Gap in CsPbBr 3, MAPbBr 3, and FAPbBr 3 Single Crystals. J Phys Chem Lett 2020; 11:2490-2496. [PMID: 32148047 PMCID: PMC7467746 DOI: 10.1021/acs.jpclett.0c00295] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 03/09/2020] [Indexed: 05/22/2023]
Abstract
Single crystals represent a benchmark for understanding the bulk properties of halide perovskites. We have indeed studied the dielectric function of lead bromide perovskite single crystals (MAPbBr3, CsPbBr3 and for the first time FAPbBr3) by spectroscopic ellipsometry in the range of 1-5 eV while varying the temperature from 183 to 440 K. An extremely low absorption coefficient in the sub-band gap region was found, indicating the high optical quality of all three crystals. We extracted the band gap values through critical point analysis showing that Tauc-based values are systematically underestimated. The two structural phase transitions, i.e., orthorhombic-tetragonal and tetragonal-cubic, show distinct optical behaviors, with the former having a discontinuous character. The cross-correlation of optical data with DFT calculations evidences the role of octahedral tilting in tailoring the value of the band gap at a given temperature, whereas differences in the thermal expansion affect the slope of the band gap trend as a function of temperature.
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Affiliation(s)
- Giovanni Mannino
- CNR-IMM, Zona Industriale Strada VIII No.
5, 95121 Catania, Italy
| | - Ioannis Deretzis
- CNR-IMM, Zona Industriale Strada VIII No.
5, 95121 Catania, Italy
| | - Emanuele Smecca
- CNR-IMM, Zona Industriale Strada VIII No.
5, 95121 Catania, Italy
| | | | | | - Davide Ceratti
- Department
of Materials and Interfaces, Weizmann Institute
of Science, Rehovot 76100, Israel
| | - David Cahen
- Department
of Materials and Interfaces, Weizmann Institute
of Science, Rehovot 76100, Israel
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35
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Mannino G, Deretzis I, Smecca E, La Magna A, Alberti A, Ceratti D, Cahen D. Temperature-Dependent Optical Band Gap in CsPbBr 3, MAPbBr 3, and FAPbBr 3 Single Crystals. J Phys Chem Lett 2020; 11:2490-2496. [PMID: 32148047 DOI: 10.1021/acs.jpclett.0c00295/suppl_file/jz0c00295_si_001.pdf] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Single crystals represent a benchmark for understanding the bulk properties of halide perovskites. We have indeed studied the dielectric function of lead bromide perovskite single crystals (MAPbBr3, CsPbBr3 and for the first time FAPbBr3) by spectroscopic ellipsometry in the range of 1-5 eV while varying the temperature from 183 to 440 K. An extremely low absorption coefficient in the sub-band gap region was found, indicating the high optical quality of all three crystals. We extracted the band gap values through critical point analysis showing that Tauc-based values are systematically underestimated. The two structural phase transitions, i.e., orthorhombic-tetragonal and tetragonal-cubic, show distinct optical behaviors, with the former having a discontinuous character. The cross-correlation of optical data with DFT calculations evidences the role of octahedral tilting in tailoring the value of the band gap at a given temperature, whereas differences in the thermal expansion affect the slope of the band gap trend as a function of temperature.
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Affiliation(s)
- Giovanni Mannino
- CNR-IMM, Zona Industriale Strada VIII No. 5, 95121 Catania, Italy
| | - Ioannis Deretzis
- CNR-IMM, Zona Industriale Strada VIII No. 5, 95121 Catania, Italy
| | - Emanuele Smecca
- CNR-IMM, Zona Industriale Strada VIII No. 5, 95121 Catania, Italy
| | | | | | - Davide Ceratti
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
| | - David Cahen
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel
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36
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Regulating strain in perovskite thin films through charge-transport layers. Nat Commun 2020; 11:1514. [PMID: 32251277 PMCID: PMC7090003 DOI: 10.1038/s41467-020-15338-1] [Citation(s) in RCA: 133] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 03/01/2020] [Indexed: 11/29/2022] Open
Abstract
Thermally-induced tensile strain that remains in perovskite films following annealing results in increased ion migration and is a known factor in the instability of these materials. Previously-reported strain regulation methods for perovskite solar cells (PSCs) have utilized substrates with high thermal expansion coefficients that limits the processing temperature of perovskites and compromises power conversion efficiency. Here we compensate residual tensile strain by introducing an external compressive strain from the hole-transport layer. By using a hole-transport layer with high thermal expansion coefficient, we compensate the tensile strain in PSCs by elevating the processing temperature of hole-transport layer. We find that compressive strain increases the activation energy for ion migration, improving the stability of perovskite films. We achieve an efficiency of 16.4% for compressively-strained PSCs; and these retain 96% of their initial efficiencies after heating at 85 °C for 1000 hours—the most stable wide-bandgap perovskites (above 1.75 eV) reported so far. Remnant tensile strain in the perovskite films induced in the thermal annealing step is a known source of material and device instabilities. Here Xue et al. use a thermal expandable hole transporting layer to compensate the strain and result in most stable wide-bandgap perovskite solar cells so far.
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37
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McClintock L, Xiao R, Hou Y, Gibson C, Travaglini HC, Abramovitch D, Tan LZ, Senger RT, Fu Y, Jin S, Yu D. Temperature and Gate Dependence of Carrier Diffusion in Single Crystal Methylammonium Lead Iodide Perovskite Microstructures. J Phys Chem Lett 2020; 11:1000-1006. [PMID: 31958953 DOI: 10.1021/acs.jpclett.9b03643] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We investigate temperature-dependent photogenerated carrier diffusion in single-crystal methylammonium lead iodide microstuctures via scanning photocurrent microscopy. Carrier diffusion lengths increased abruptly across the tetragonal to orthorhombic phase transition and reached 200 ± 50 μm at 80 K. In combination with the microsecond carrier lifetime measured by a transient photocurrent method, an enormous carrier mobility value of 3 × 104 cm2/V s was extracted at 80 K. The observed highly nonlocal photocurrent and the rapid increase of the carrier diffusion length at low temperatures can be understood by the formation and efficient transport of free excitons in the orthorhombic phase as a result of reduced optical phonon scattering due to the dipolar nature of the excitons. Carrier diffusion lengths were tuned by a factor of 8 by gate voltage and increased with increasing majority carrier (electron) concentration, consistent with the exciton model.
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Affiliation(s)
- Luke McClintock
- Department of Physics , University of California-Davis , One Shields Avenue , Davis , California 95616 , United States
| | - Rui Xiao
- Department of Physics , University of California-Davis , One Shields Avenue , Davis , California 95616 , United States
| | - Yasen Hou
- Department of Physics , University of California-Davis , One Shields Avenue , Davis , California 95616 , United States
| | - Clinton Gibson
- Department of Physics , University of California-Davis , One Shields Avenue , Davis , California 95616 , United States
| | - Henry Clark Travaglini
- Department of Physics , University of California-Davis , One Shields Avenue , Davis , California 95616 , United States
| | - David Abramovitch
- Department of Physics , University of California-Berkeley , 366 LeConte Hall , Berkeley , California 94720 , United States
- Molecular Foundry , Lawrence Berkeley Laboratory , 67 Cyclotron Road , Berkeley , California 94720 , United States
| | - Liang Z Tan
- Molecular Foundry , Lawrence Berkeley Laboratory , 67 Cyclotron Road , Berkeley , California 94720 , United States
| | | | - Yongping Fu
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Song Jin
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Dong Yu
- Department of Physics , University of California-Davis , One Shields Avenue , Davis , California 95616 , United States
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38
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Kawachi S, Atsumi M, Saito N, Ohashi N, Murakami Y, Yamaura JI. Structural and Thermal Properties in Formamidinium and Cs-Mixed Lead Halides. J Phys Chem Lett 2019; 10:6967-6972. [PMID: 31645099 DOI: 10.1021/acs.jpclett.9b02750] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Formamidinium [FA, HC(NH2)2+] lead iodide and its cation mixture have attracted interest as potentials in applications for efficient solar cells superior to well-known methylammonium lead iodide. We investigated the crystal structure and thermodynamic properties of high-quality single crystals of FA1-xCsxPbI3 for x = 0 and 0.1 through X-ray diffraction and heat capacity measurements. Both α-FA0.9Cs0.1PbI3 as well as α-FAPbI3 crystallize in a cubic Pm3̅m structure with orientationally disordered FA molecules confined in the nondistorted Pb-I framework. In FAPbI3, we observed a second-order transition at 280 K and two first-order transitions at 141.2 and 130.2 K in between β- and γ-phases instead of the previously known single β-γ transition. After doping with 10% Cs, the multiple first-order transitions disappeared, leading to phase transitions emerging at 300 and 149 K with second-order character. We moreover observed low-energy localized modes for both compounds, which is presumably tied to anomalous thermal motion, rattling, of the FA molecule.
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Affiliation(s)
- Shiro Kawachi
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , Yokohama , Kanagawa 226-8503 , Japan
| | - Mika Atsumi
- National Institute for Materials Science (NIMS) , Tsukuba , Ibaraki 305-0044 , Japan
| | - Noriko Saito
- National Institute for Materials Science (NIMS) , Tsukuba , Ibaraki 305-0044 , Japan
| | - Naoki Ohashi
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , Yokohama , Kanagawa 226-8503 , Japan
- National Institute for Materials Science (NIMS) , Tsukuba , Ibaraki 305-0044 , Japan
| | - Youichi Murakami
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , Yokohama , Kanagawa 226-8503 , Japan
- Condensed Matter Research Center, Institute of Materials Structure Science , High Energy Accelerator Research Organization (KEK) , Tsukuba , Ibaraki 305-0801 , Japan
| | - Jun-Ichi Yamaura
- Materials Research Center for Element Strategy , Tokyo Institute of Technology , Yokohama , Kanagawa 226-8503 , Japan
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