@article{55760da1a9b84ac593b3df26ca9022e6,
title = "Thiocyanate-Mediated Dimensionality Transformation of Low-Dimensional Perovskites for Photovoltaics",
abstract = "Two-dimensional (2D) hybrid perovskite solar cells have induced widespread research interest owing to their higher stability as compared to three-dimensional (3D) analogues. The photovoltaic performance, however, is still limited. Here, we report a perovskite film dominated by 3D components that are modulated by formamidinium thiocyanate in the 2D PEA2FA3Pb4I13perovskite composition. We demonstrate that a dimensionality transformation from a 2D/3D to predominantly 3D perovskite phase in the presence of SCN-based treatment enhances the optical absorption in visible and near-infrared regions. As a result, the power conversion efficiency improved 4.5 times with respect to the control to above 14%. The unencapsulated cell exhibited excellent moisture stability during the shelf lifetime measurement over 70 days under ambient conditions.",
author = "Li Hong and Zaiwei Wang and Mili{\'c}, {Jovana V.} and Avalos, {Claudia E.} and Weihua Zhang and Dan Ren and Cheng Wang and Brian Carlsen and Yuhang Liu and Zakeeruddin, {Shaik Mohammed} and Anders Hagfeldt and Ti Wang and Hongwei Han and Michael Graetzel",
note = "Funding Information: L.H. and Z.W. thank the China Scholarship Council for funding. J.V.M., Y.L., S.M.Z., and M.G. thank the King Abdulaziz City for Science and Technology (KACST) and the European Union{\textquoteright}s Horizon 2020 research and innovation program (grant agreement no. 826013) for financial support. D.R. acknowledges the financial support from Swiss National Science Foundation under project no. IZLCZ2_170294 “All perovskite tandems for Solar CO conversion” and Gerbert R{\"u}f Stiftung under project no. GRS-080/19 “Solar-Bio Fuels”. W.Z. and H.H. acknowledge financial support from the National Natural Science Foundation of China (Grant nos. 91733301 and 21702069), the Fundamental Research Funds for the Central Universities, the Science and Technology Department of Hubei Province (no. 2017AAA190), the 111 Project (no. B07038), the Program for HUST Academic Frontier Youth Team (2016QYTD06), and the Double first-class research funding of China-EU Institute for Clean and Renewable Energy (no. ICARE-RP-2018-SOLAR-001 and ICARE-RP-2018-SOLAR-002). 2 Publisher Copyright: {\textcopyright} 2022 American Chemical Society. All rights reserved.",
year = "2022",
month = jul,
day = "26",
doi = "10.1021/acs.chemmater.2c00760",
language = "English (US)",
volume = "34",
pages = "6331--6338",
journal = "Chemistry of Materials",
issn = "0897-4756",
publisher = "American Chemical Society",
number = "14",
}