ORCID Profile
0000-0003-0011-5644
Current Organisation
University of Melbourne
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Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0RA08890K
Abstract: 0D Cs 4 PbBr 6 perovskite microcrystals exhibit a radiative recombination coefficient two orders of magnitude higher than typical 3D perovskite.
Publisher: Wiley
Date: 30-04-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TC00606A
Abstract: Quasi-2D perovskite films deposited on hot substrates are shown to possess a sandwich-like, large- n /small- n /large- n phase distribution profile in the orthogonal direction. This structure facilitates both exciton funneling to the film surfaces and efficient charge carrier transport.
Publisher: American Chemical Society (ACS)
Date: 28-08-2018
Abstract: The current-voltage hysteresis, as well as the performance instability of perovskite solar cells (PSCs) under a working condition, is serving as the major obstacle toward their commercialization while the exact fundamental mechanisms to these issues are still in debate. In this study, we investigated the slow variation of photogenerated carrier dynamics in a (FAPbI
Publisher: Wiley
Date: 06-02-2022
Abstract: Quasi‐2D Ruddlesden–Popper perovskites (RPPs) are candidates for constructing perovskite solar cells (PSCs) with superior stability due to their tolerance to the external environment. Fully understanding the film growth mechanism and structure is crucial to further improve the performance of 2D‐PSCs while maintaining device stability. In this work, the origin of Brownian tree‐shaped dendrites formed in hot‐cast methylammonium chloride (MACl)‐doped BA 2 MA n −1 Pb n I 3 n +1 ( n = 5) quasi‐2D perovskite films are reported. Investigations based on optical, electronic, atomic force, and fluorescence microscopies reveal that the dendrites are assembled from large‐ n RPPs‐dominated grains, while the nondendritic film area is composed of small‐ n RPPs grains and associated with film surface pits caused by the evaporation of MACl. It is proposed that these dendrites are grown by the diffusion‐limited aggregation of the MA‐rich intermediate phase domains that initially crystallize from the precursor. The formation of these dendrites in quasi‐2D perovskite films upon MACl doping is accompanied by improved organization and crystallinity of the 2D RPPs, which benefits the photovoltaic performance. This work provides new insights into the formation mechanism of quasi‐2D perovskite films that should assist device engineering strategies to further improve the performance of 2D PSCs.
No related grants have been discovered for Fei Zheng.