Flexible Perovskite/Silicon Tandem Solar Cells Exceeding 30% Efficiency at Scale
Abstract
ABSTRACT Flexible perovskite/silicon tandem solar cells (FTSCs) represent a frontier for high‐power‐density, conformable electronics, yet their commercial viability is hindered by the dual challenges of interfacial carrier recombination and mechanical delamination at the perovskite/C 60 interface. Here, we demonstrate a bimolecular piperazine‐derived interface engineering strategy that simultaneously optimizes interfacial photophysics and structural integrity. By applying a synergistic combination of piperazine dihydrochloride (PDCl) and 1‐(4‐chlorophenyl) piperazine hydrochloride ( p ‐ClPh‐PCl), we achieve complementary field‐effect passivation and in situ formation of a stabilizing low‐dimensional template. While PDCl effectively suppresses interfacial trap states and modulates band alignment for accelerated electron extraction, the p ‐ClPh‐PCl facilitates uniform C 60 growth, preventing fullerene aggregation and reinforcing interfacial adhesion. This unified molecular design enables us to reach a power conversion efficiency of 31.51% (1 cm 2 ) and a 30.31% for large‐area (17.64 cm 2 ) FTSCs, surpassing 30% PCE for the first time in FTSCs exceeding 10 cm 2 in device area. Furthermore, these devices exhibit exceptional durability, retaining 95% of their initial efficiency after 20,000 bending cycles and 650 h of continuous illumination.
Article Details
Authors (19)
Yongbin Jin
Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing Institute of Luminescent Materials and Information Displays College of Materials Science and Engineering Huaqiao University Xiamen 361021 China
Boxin Jiao
Jin Huang
Huiping Feng
Xiamen Key Laboratory of Optoelectronic Materials and Advanced Manufacturing Institute of Luminescent Materials and Information Displays College of Materials Science and Engineering Huaqiao University Xiamen 361021 China
Chengtang Den
State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing China
Ningyu Ren
State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing China
Minghao Li
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6−1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
Ruihao Su
State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing China
Di Qian
State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing China
Mohan Ding
State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing China
Jérôme Gabathuler
State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing China
Yiran Ye
State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing China
Wenbao Yang
Jinneng Clean Energy Technology Co., Ltd Lvliang Shanxi China
Ruizhi Wang
Haifeng Shi
1sheyang, Yancheng, China
Delia A. Haynes
Department of Chemistry & Polymer Science Stellenbosch University Stellenbosch South Africa
Liqiang Xie
Zhanhua Wei
Chenyi Yi
State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Tsinghua University Beijing China