Sulfur contributes to stable and efficient carbon-based perovskite solar cells

Caiyun Liu; Zhen He; Yang Li; Anmin Liu; Rui Cai; Liguo Gao; Tingli Ma

doi:10.1016/j.jcis.2021.07.058

Sulfur contributes to stable and efficient carbon-based perovskite solar cells

J Colloid Interface Sci. 2022 Jan:605:54-59. doi: 10.1016/j.jcis.2021.07.058. Epub 2021 Jul 16.

Authors

Caiyun Liu¹, Zhen He¹, Yang Li², Anmin Liu¹, Rui Cai³, Liguo Gao⁴, Tingli Ma⁵

Affiliations

¹ State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, PR China.
² State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, PR China. Electronic address: chyangli@dlut.edu.cn.
³ Leicester International Institute, Dalian University of Technology, Panjin 124221, PR China.
⁴ College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, PR China. Electronic address: liguo.gao@dlut.edu.cn.
⁵ College of Materials and Chemistry, China Jiliang University, Hangzhou 310018, PR China; Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu, Fukuoka 808-0196, Japan.

PMID: 34303924
DOI: 10.1016/j.jcis.2021.07.058

Abstract

The power conversion efficiency (PCE) of perovskite solar cells (PSCs) is already higher than those of other thin-film photovoltaic technologies, but the stability issue limits their applications. The introduction of sulfur-based compounds in PSCs could contribute to their stability. Herein, sulfur-based compounds have been embedded into each functional layer to stabilize carbon-based PSCs (C-PSCs). Results showed that the simultaneous introduction of sulfur-based compounds could decrease the trap states of perovskite film, enlarge the grain size of perovskite, and accelerate the charge transfer and extraction, leading to an improved performance. Comparing with the device without sulfide (10.77%), all sulfide C-PSCs obtained a PCE of 15.38%. The stability test showed much better resistance to humidity and thermal stress for all sulfide C-PSCs. They could retain 80% of initial PCE after aging about 700 h at relative humidity (RH) 45% ± 10% and 80 °C.

Keywords: All sulfide carbon-based PSCs (C-PSCs); Stability; Sulfur-based compounds.