Academic Journal
Origin of Phase Transitions in Inorganic Lead Halide Perovskites: Interplay between Harmonic and Anharmonic Vibrations
| العنوان: | Origin of Phase Transitions in Inorganic Lead Halide Perovskites: Interplay between Harmonic and Anharmonic Vibrations |
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| المؤلفون: | Li, Zhi-Gang, Zacharias, Marios, Zhang, Ying, Wei, Fengxia, Qin, Yan, Yang, Yong-Qing, An, Lian-Cai, Gao, Fei-Fei, Li, Wei, Even, Jacky, Bu, Xian-He |
| المساهمون: | Nankai University (NKU), Institut des Fonctions Optiques pour les Technologies de l'informatiON (FOTON), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-École Nationale Supérieure des Sciences Appliquées et de Technologie (ENSSAT)-Centre National de la Recherche Scientifique (CNRS), Faculty of Science (Singapore), National University of Singapore (NUS), 101106654, HORIZON EUROPE Marie Sklodowska-Curie Actions, 63196006, Fundamental Research Funds for the Central Universities, 21975132, National Natural Science Foundation of China, European Project: ULTRA-2DPK |
| المصدر: | ISSN: 2380-8195. |
| بيانات النشر: | HAL CCSD American Chemical Society |
| سنة النشر: | 2023 |
| المجموعة: | Université de Rennes 1: Publications scientifiques (HAL) |
| مصطلحات موضوعية: | [PHYS]Physics [physics], [CHIM]Chemical Sciences |
| الوصف: | International audience ; Inorganic lead halide perovskites (ILHPs) exhibit a series of phase transitions, and stabilization of the phases with desirable optoelectronic properties remains a major challenge. However, the intrinsic origins of structural instabilities in CsPbX3 (X = Br, I) are still elusive. Herein, the important role of harmonic and anharmonic vibrations in influencing thermodynamic fluctuations of ILHPs was revealed, through combined lattice dynamics and multiphonon theory calculations, and verified by diffraction experiments. Our results demonstrate that the transition between δ- and γ-CsPbI3 is driven by harmonic vibrations, unveiling the mysterious mechanism for stabilizing γ-CsPbI3 via applying strain. Moreover, the successive transitions from the α- to β- and β- to γ-phases of CsPbX3 are driven by anharmonic vibrations. These structural dynamics are strongly coherent with the phonon diffuse scattering, substantially affecting the thermal conductivity and carrier relaxation. This work provides guidelines for maintaining favorable ILHP phases through delicately manipulating their lattice dynamics. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | hal-04130843; https://hal.science/hal-04130843; https://hal.science/hal-04130843/document; https://hal.science/hal-04130843/file/preproof.pdf |
| DOI: | 10.1021/acsenergylett.3c00881 |
| الاتاحة: | https://hal.science/hal-04130843 https://hal.science/hal-04130843/document https://hal.science/hal-04130843/file/preproof.pdf https://doi.org/10.1021/acsenergylett.3c00881 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.5A529ED3 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1021/acsenergylett.3c00881 |
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