Interface modification for efficient and stable inverted inorganic perovskite solar cells

Xu, Tianfei; Xiang, Wanchun; Yang, Junjie; Kubicki, Dominik J.; Tress, Wolfgang; Chen, Tao; Fang, Zhimin; Liu, Yali; Liu, Shengzhong

doi:10.1002/adma.202303346

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Interface modification for efficient and stable inverted inorganic perovskite solar cells
Authors:	Xu, Tianfei Xiang, Wanchun Yang, Junjie Kubicki, Dominik J. Tress, Wolfgang Chen, Tao Fang, Zhimin Liu, Yali Liu, Shengzhong
et. al:	No
DOI:	10.1002/adma.202303346
Published in:	Advanced Materials
Volume(Issue):	35
Issue:	31
Page(s):	e2303346
Issue Date:	Aug-2023
Publisher / Ed. Institution:	Wiley
ISSN:	0935-9648 1521-4095
Language:	English
Subjects:	Energy level; Inorganic perovskite solar cells; Inverted structure; Power conversion efficiency; Stability
Subject (DDC):	621.3: Electrical, communications, control engineering
Abstract:	Due to their excellent thermal stability and ideal bandgap, metal halide inorganic perovskite based solar cells (PSCs) with inverted structure are considered as an excellent choice for perovskite/silicon tandem solar cells. However, the power conversion efficiency (PCE) of inverted inorganic perovskite solar cells (PSCs) still lags far behind that of conventional n-i-p PSCs due to interfacial energy level mismatch and high nonradiative charge recombination. Herein, the performance of inverted PSCs is significantly improved by interfacial engineering of CsPbI3- x Brx films with 2-mercapto-1-methylimidazole (MMI). It is found that the mercapto group can preferably react with the undercoordinated Pb2+ from perovskite by forming Pb-S bonds, which appreciably reduces the surface trap density. Moreover, MMI modification results in a better energy level alignment with the electron-transporting material, promoting carrier transfer and reducing voltage deficit. The above combination results in an open-circuit voltage enhancement by 120 mV, yielding a champion PCE of 20.6% for 0.09 cm2 area and 17.3% for 1 cm2 area. Furthermore, the ambient, operational and heat stabilities of inorganic PSCs with MMI modification are also greatly improved. The work demonstrates a simple but effective approach for fabricating highly efficient and stable inverted inorganic PSCs.
URI:	https://digitalcollection.zhaw.ch/handle/11475/30065
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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Xu, T., Xiang, W., Yang, J., Kubicki, D. J., Tress, W., Chen, T., Fang, Z., Liu, Y., & Liu, S. (2023). Interface modification for efficient and stable inverted inorganic perovskite solar cells. Advanced Materials, 35(31), e2303346. https://doi.org/10.1002/adma.202303346

Xu, T. et al. (2023) ‘Interface modification for efficient and stable inverted inorganic perovskite solar cells’, Advanced Materials, 35(31), p. e2303346. Available at: https://doi.org/10.1002/adma.202303346.

T. Xu et al., “Interface modification for efficient and stable inverted inorganic perovskite solar cells,” Advanced Materials, vol. 35, no. 31, p. e2303346, Aug. 2023, doi: 10.1002/adma.202303346.

XU, Tianfei, Wanchun XIANG, Junjie YANG, Dominik J. KUBICKI, Wolfgang TRESS, Tao CHEN, Zhimin FANG, Yali LIU und Shengzhong LIU, 2023. Interface modification for efficient and stable inverted inorganic perovskite solar cells. Advanced Materials. August 2023. Bd. 35, Nr. 31, S. e2303346. DOI 10.1002/adma.202303346

Xu, Tianfei, Wanchun Xiang, Junjie Yang, Dominik J. Kubicki, Wolfgang Tress, Tao Chen, Zhimin Fang, Yali Liu, and Shengzhong Liu. 2023. “Interface Modification for Efficient and Stable Inverted Inorganic Perovskite Solar Cells.” Advanced Materials 35 (31): e2303346. https://doi.org/10.1002/adma.202303346.

Xu, Tianfei, et al. “Interface Modification for Efficient and Stable Inverted Inorganic Perovskite Solar Cells.” Advanced Materials, vol. 35, no. 31, Aug. 2023, p. e2303346, https://doi.org/10.1002/adma.202303346.