Brominated PEAI as multi‐functional passivator for high‐efficiency perovskite solar cell

Li, Minghao; Zhou, Junjie; Tan, Liguo; Liu, Yue; Wang, Siyang; Jiang, Chaofan; Li, Hang; Zhao, Xing; Gao, Xingyu; Tress, Wolfgang; Ding, Liming; Yi, Chenyi

doi:10.1002/eem2.12360

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Brominated PEAI as multi‐functional passivator for high‐efficiency perovskite solar cell
Authors:	Li, Minghao Zhou, Junjie Tan, Liguo Liu, Yue Wang, Siyang Jiang, Chaofan Li, Hang Zhao, Xing Gao, Xingyu Tress, Wolfgang Ding, Liming Yi, Chenyi
et. al:	No
DOI:	10.1002/eem2.12360
Published in:	Energy & Environmental Materials
Issue Date:	2022
Publisher / Ed. Institution:	Wiley
ISSN:	2575-0356
Language:	English
Subject (DDC):	621.3: Electrical, communications, control engineering
Abstract:	The interfaces of perovskite solar cells (PSCs) are well known to be rich in deep-level carrier traps, which serve as non-radiative recombination centers and limit the open-circuit voltage (Voc) and power conversion efficiency (PCE) of PSCs. Defect chemistry and surface passivators have been researched extensively and mainly focused on the neutralization of uncoordinated lead or anion defects. Herein, a novel brominated passivator 2-bromophenethylammonium iodide (2-Br-PEAI) is introduced for a multi-functional passivation effect at the perovskite interface. The brominated species readily form 2D perovskite on top of the 3D perovskite and multi-interact with the 3D perovskite surface. Apart from the halide vacancy filling and anion bonding ability, the Br atoms on the benzene ring can interact with the FA cations via strong hydrogen bonding N-H ⋯ Br and interact with the [PbI6]4− inorganic framework. The interface defects in the PSCs are well passivated, minimizing non-radiative recombination and enhancing device performance. As a result, a champion PCE of 24.22% was achieved with high Voc and fill factor. In addition, modified devices also showed enhanced operational stability (retention of >95% initial PCE after 400 h) and humidity resistance (>90% initial PCE maintained after 1500 h under ~50% RH).
URI:	https://digitalcollection.zhaw.ch/handle/11475/26611
Fulltext version:	Published 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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Li, M., Zhou, J., Tan, L., Liu, Y., Wang, S., Jiang, C., Li, H., Zhao, X., Gao, X., Tress, W., Ding, L., & Yi, C. (2022). Brominated PEAI as multi‐functional passivator for high‐efficiency perovskite solar cell. Energy & Environmental Materials. https://doi.org/10.1002/eem2.12360

Li, M. et al. (2022) ‘Brominated PEAI as multi‐functional passivator for high‐efficiency perovskite solar cell’, Energy & Environmental Materials [Preprint]. Available at: https://doi.org/10.1002/eem2.12360.

M. Li et al., “Brominated PEAI as multi‐functional passivator for high‐efficiency perovskite solar cell,” Energy & Environmental Materials, 2022, doi: 10.1002/eem2.12360.

LI, Minghao, Junjie ZHOU, Liguo TAN, Yue LIU, Siyang WANG, Chaofan JIANG, Hang LI, Xing ZHAO, Xingyu GAO, Wolfgang TRESS, Liming DING und Chenyi YI, 2022. Brominated PEAI as multi‐functional passivator for high‐efficiency perovskite solar cell. Energy & Environmental Materials. 2022. DOI 10.1002/eem2.12360

Li, Minghao, Junjie Zhou, Liguo Tan, Yue Liu, Siyang Wang, Chaofan Jiang, Hang Li, et al. 2022. “Brominated PEAI as Multi‐Functional Passivator for High‐Efficiency Perovskite Solar Cell.” Energy & Environmental Materials. https://doi.org/10.1002/eem2.12360.

Li, Minghao, et al. “Brominated PEAI as Multi‐Functional Passivator for High‐Efficiency Perovskite Solar Cell.” Energy & Environmental Materials, 2022, https://doi.org/10.1002/eem2.12360.