Efficient Perovskite–Cu(In,Ga)Se 2 Tandem Solar Cells Enabled by Coevaporation

ACS Energy Letters 2026

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Authors: Nengxu Li, Shuping Lin, Xiuxiu Niu, Zhenrong Jia, Ming Zhao, Ying Zhao, Yao Sun, Dalong Zhong, Yi Hou
DOI: 10.1021/acsenergylett.5c04203
Cited by: 3
References: 22

Abstract

We demonstrated perovskite–Cu(In,Ga)Se 2 (CIGS) tandem solar cells in which the perovskite top absorber is deposited by coevaporation, enabling highly uniform film formation on rough CIGS bottom cells. In addition, we introduced a compact tin oxide buffer layer on the zinc oxide surface, effectively preventing the detrimental Lewis acid–base reaction with the perovskite. A certified power conversion efficiency of 24.5% (1 cm 2 aperture area) is achieved from the resulting monolithic perovskite–CIGS tandems. This work establishes a scalable vacuum-based route for delivering high-efficiency perovskite–CIGS tandem photovoltaics.

Fields of Study & Subjects

Perovskite Materials and Applications Chalcogenide Semiconductor Thin Films TiO2 Photocatalysis and Solar Cells

Publication details

Journal / source
ACS Energy Letters
Publisher
American Chemical Society (ACS)
Volume
11
Issue
2
Pages
1605–1608
Publication date
2 February 2026
Language
EN