Journal
MATTER
Volume 4, Issue 1, Pages -Publisher
CELL PRESS
DOI: 10.1016/j.matt.2020.10.023
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Funding
- Research Grant Council of Hong Kong (RGC) [24306318, 4053347, 4055119]
- National Natural Science Foundation of China [11674252]
- Natural Science Foundation of Hubei Province, China [2019AAA020]
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This study systematically investigates the role of halide elements in the crystallization kinetics, phase-transition, and stabilization mechanism of all-inorganic perovskites. By precise compositional engineering, high-performance ternary halide (I, Br, Cl) all-inorganic PSCs were successfully fabricated. These results provide guidance for a comprehensive understanding of all-inorganic perovskite materials and pave the way for achieving high-performance all-inorganic PSCs.
All-inorganic perovskite solar cells (PSCs) have attracted wide attention for their excellent thermal stability. However, the detailed crystallization process and complicated phase-transition mechanism of the CsPbX3 film with different halide compositions (I, Br, Cl) remain mysterious. In this study, systematic investigations are performed via state-of-art in situ grazing-incidence wide-angle X-ray scattering to understand the role of the halide elements in all-inorganic perovskite crystallization kinetics, phase-transition, and stabilization mechanism as well as how film morphology and grain size are affected. Based on these results, we were able to fabricate high-performance ternary halide (I, Br, Cl) all-inorganic PSCs through a precise compositional engineering. Our results provide guidance for an in-depth understanding of all-inorganic perovskite materials and pave the way to obtain high-performance all-inorganic PSCs.
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