Journal Article

FZJ-2026-01213

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tailoring nanoscale interfaces for perovskite–perovskite–silicon triple-junction solar cells

Zheng, J. (Corresponding author) ; Wang, G. ; Duan, L. (Corresponding author) ; Duan, W. ; Jiang, Y. ; Pearce, P. ; Gao, Y. ; Mahmud, M. A. ; Liao, C. ; Leung, T. L. ; Bing, J. ; Li, Z. ; Sun, Z. ; Cui, X. ; Bailey, C. ; Jankovec, M. ; Yi, J. ; Tao, R. ; Zheng, L. ; Zhu, B. ; Sun, Y. ; Sun, N.FZJ* ; Huang, G.FZJ* ; Wang, L. ; Lambertz, A.FZJ* ; Bremner, S. ; Liao, X. ; Wu, T. ; Xie, G. ; Rothmann, M. U. ; Topič, M. ; McKenzie, D. R. ; Ding, K.FZJ* ; Li, W. ; Chen, Z. (Corresponding author) ; Ho-Baillie, A. W. Y. (Corresponding author)

2025
Nature Publishing Group London [u.a.]

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Please use a persistent id in citations: doi:10.1038/s41565-025-02015-x  doi:10.34734/FZJ-2026-01213

Abstract: Triple‐junction solar cells theoretically outperform their double-junction and single‐junction counterparts in power conversion efficiency, yet practical perovskite–perovskite–silicon devices have fallen short of both theoretical limits and commercial targets. To address surface defects in the top perovskite junction, we introduce a piperazine-1,4-diium chloride treatment, which replaces less stable lithium fluoride. For interfacing the top and middle perovskite junctions, we optimize the size of gold nanoparticles deposited on atomic layer-deposited tin oxide for best ohmic contacting with minimal optical losses. Applying these strategies, our champion 1-cm2 triple‐junction cell achieved a third party-verified reverse‐scan power conversion efficiency of 27.06% with an open circuit voltage of 3.16 V. Scaling up to 16 cm2, the device produced a certified steady‐state power conversion efficiency of 23.3%. Device longevity also improved by eliminating methylammonium and incorporating rubidium into the perovskite bulk alongside the piperazine-1,4-diium chloride surface layer. An encapsulated 1-cm2 cell retained 95% of its initial efficiency after 407 h at maximum power point and passed the IEC 61215 thermal cycling test. These results represent advancements towards efficient and stable perovskite–perovskite–silicon triple-junction solar cells.

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Contributing Institute(s):

1. Photovoltaik (IMD-3)

Research Program(s):

1. 1212 - Materials and Interfaces (POF4-121) (POF4-121)

Appears in the scientific report 2025

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Nature ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 30 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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