Issue

Vol. 15 (2023)

Mixed Cations Enabled Combined Bulk and Interfacial Passivation for Efficient and Stable Perovskite Solar Cells

https://doi.org/10.1007/s40820-023-01085-7
Pengfei Wu
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
Shirong Wang
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
Jin Hyuck Heo
Department of Chemical and Biological Engineering, Korea University, 145 Anam‑Ro, Seongbuk‑Gu, Seoul 17104, Republic of Korea
Hongli Liu
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
Xihan Chen
SUSTech Energy Institute for Carbon Neutrality, Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, People’s Republic of China
Xianggao Li
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China
Fei Zhang
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, People’s Republic of China

Corresponding Author: Fei Zhang

fei_zhang@tju.edu.cn

Nano-Micro Letters, Vol. 15 (2023), Article Number: 114

Abstract

Here, we report a mixed GAI and MAI (MGM) treatment method by forming a 2D alternating-cation-interlayer (ACI) phase (n = 2) perovskite layer on the 3D perovskite, modulating the bulk and interfacial defects in the perovskite films simultaneously, leading to the suppressed nonradiative recombination, longer lifetime, higher mobility, and reduced trap density. Consequently, the devices’ performance is enhanced to 24.5% and 18.7% for 0.12 and 64 cm2, respectively. In addition, the MGM treatment can be applied to a wide range of perovskite compositions, including MA-, FA-, MAFA-, and CsFAMA-based lead halide perovskites, making it a general method for preparing efficient perovskite solar cells. Without encapsulation, the treated devices show improved stabilities.


Highlights:


1 A mixed GAI and MAI (MGM) treatment modulating the bulk and interfacial defects simultaneously is reported.
2 The devices’ performance is enhanced to ~24.5% in 0.12 cm2 and ~18.7% in 64 cm2 with improved stability.
3 The MGM treatment can be applied to a wide range of perovskite compositions.

Keywords

Alternating-cation-interlayer Bulk defects Interfacial passivation Perovskite solar cells
Wu, Pengfei, Shirong Wang, Jin Hyuck Heo, Hongli Liu, Xihan Chen, Xianggao Li, and Fei Zhang. 2023. “Mixed Cations Enabled Combined Bulk and Interfacial Passivation for Efficient and Stable Perovskite Solar Cells”. Nano-Micro Letters 15 (April):114. https://doi.org/10.1007/s40820-023-01085-7.
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