@article{7b999b3571e747b7a1ed2891a0e26b55,
title = "Bottom-Up Quasi-Epitaxial Growth of Hybrid Perovskite from Solution Process—Achieving High-Efficiency Solar Cells via Template-Guided Crystallization",
abstract = "Epitaxial growth gives the highest-quality crystalline semiconductor thin films for optoelectronic devices. Here, a universal solution-processed bottom-up quasi-epitaxial growth of highly oriented α-formamidinium lead triiodide (α-FAPbI3) perovskite film via a two-step method is reported, in which the crystal orientation of α-FAPbI3 film is precisely controlled through the synergetic effect of methylammonium chloride and the large-organic cation butylammonium bromide. In situ GIWAXS visualizes the BA-related intermediate phase formation at the bottom of film, which serves as a guiding template for the bottom-up quasi-epitaxial growth in the subsequent annealing process. The template-guided epitaxially grown BAFAMA perovskite film exhibits increased crystallinity, preferred crystallographic orientation, and reduced defects. Moreover, the BAFAMA perovskite solar cells demonstrate decent stability, maintaining 95% of their initial power conversion efficiency after 2600 h ambient storage, and 4-time operation condition lifetime enhancement.",
keywords = "bottom-up growth, perovskite solar cells, quasi-epitaxial growth, self-assembly",
author = "Hengkai Zhang and Minchao Qin and Zhiliang Chen and Wei Yu and Zhiwei Ren and Kuan Liu and Jiaming Huang and Yaokang Zhang and Qiong Liang and Chandran, {Hrisheekesh Thachoth} and Fong, {Patrick W.K.} and Zijian Zheng and Xinhui Lu and Gang Li",
note = "Funding Information: All authors gratefully acknowledge the beamtime and technical support provided by 23A SWAXS beamline at NSRRC, Hsinchu. Funding: G.L. would like to thank the support by Research Grants Council of Hong Kong (Grant No. 15246816 and C5037-18G), Shenzhen Science and Technology Innovation Commission (Project No. JCYJ20170413154602102), the Project of Strategic Importance (Project No. 1-ZE29), University Supporting Fund for Major Research (1-BBAS), and Sir Sze-yuen Chung Endowed Professorship Fund (8-8480) provided by the Hong Kong Polytechnic University; X.L. and M.Q. acknowledge the financial support from Research Grant Council of Hong Kong (GRF No. 24306318). Funding Information: All authors gratefully acknowledge the beamtime and technical support provided by 23A SWAXS beamline at NSRRC, Hsinchu. Funding: G.L. would like to thank the support by Research Grants Council of Hong Kong (Grant No. 15246816 and C5037‐18G), Shenzhen Science and Technology Innovation Commission (Project No. JCYJ20170413154602102), the Project of Strategic Importance (Project No. 1‐ZE29), University Supporting Fund for Major Research (1‐BBAS), and Sir Sze‐yuen Chung Endowed Professorship Fund (8‐8480) provided by the Hong Kong Polytechnic University; X.L. and M.Q. acknowledge the financial support from Research Grant Council of Hong Kong (GRF No. 24306318). Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",
year = "2021",
month = jun,
day = "3",
doi = "10.1002/adma.202100009",
language = "English",
volume = "33",
journal = "Advanced Materials",
issn = "0935-9648",
publisher = "Wiley-Blackwell",
number = "22",
}