Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-20649
Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: Vapor-assisted deposition of highly efficient, stable black-phase FAPbI3 perovskite solar cells
Authors: Lu, Haizhou
Liu, Yuhang
Ahlawat, Paramvir
Mishra, Aditya
Tress, Wolfgang
Eickemeyer, Felix T
Yang, Yingguo
Fu, Fan
Wang, Zaiwei
Avalos, Claudia E
Carlsen, Brian I
Agarwalla, Anand
Zhang, Xin
Li, Xiaoguo
Zhan, Yiqiang
Zakeeruddin, Shaik M
Emsley, Lyndon
Rothlisberger, Ursula
Zheng, Lirong
Hagfeldt, Anders
Grätzel, Michael
et. al: No
DOI: 10.1126/science.abb8985
10.21256/zhaw-20649
Published in: Science
Volume(Issue): 370
Issue: 6512
Pages: eabb8985
Issue Date: 2020
Publisher / Ed. Institution: American Association for the Advancement of Science
ISSN: 0036-8075
1095-9203
Language: English
Subject (DDC): 621.3: Electrical engineering and electronics
Abstract: Mixtures of cations or halides with FAPbI3 (where FA is formamidinium) lead to high efficiency in perovskite solar cells (PSCs) but also to blue-shifted absorption and long-term stability issues caused by loss of volatile methylammonium (MA) and phase segregation. We report a deposition method using MA thiocyanate (MASCN) or FASCN vapor treatment to convert yellow δ-FAPbI3 perovskite films to the desired pure α-phase. NMR quantifies MA incorporation into the framework. Molecular dynamics simulations show that SCN- anions promote the formation and stabilization of α-FAPbI3 below the thermodynamic phase-transition temperature. We used these low-defect-density α-FAPbI3 films to make PSCs with >23% power-conversion efficiency and long-term operational and thermal stability, as well as a low (330 millivolts) open-circuit voltage loss and a low (0.75 volt) turn-on voltage of electroluminescence.
URI: https://digitalcollection.zhaw.ch/handle/11475/20649
Fulltext version: Accepted version
License (according to publishing contract): Licence according to publishing contract
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Appears in Collections:Publikationen School of Engineering

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