Journal Article

FZJ-2025-03322

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Locating Non‐Radiative Recombination Losses and Understanding Their Impact on the Stability of Perovskite Solar Cells During Photo‐Thermal Accelerated Ageing

Peng, Z. (Corresponding author) ; Wortmann, J.FZJ* ; Hong, J. ; Zhou, S. ; Bornschlegl, A. J. ; Haffner-Schirmer, J. ; Corre, V. M. L. ; Heumüller, T.FZJ* ; Osvet, A. ; Rand, B. P. ; Lüer, L. (Corresponding author)FZJ* ; Brabec, C. J. (Corresponding author)FZJ*

2025
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/aenm.202502787

Abstract: Commercialization of perovskite solar cells (PSCs) requires further breakthroughs in stability, but the complex degradation mechanisms and the interplay of the underlying stress factors complicate insight-driven improvement of long-term stability. This study establishes a quantitative link between potential degradation—specifically open-circuit voltage (VOC) and quasi-Fermi level splitting (QFLS)—and the photo-thermal stability of PSCs. It is highlighted that an increase in non-radiative recombination losses induces the seemingly negligible decrease in VOC and QFLS, though it causes a significant decrease in fill factor (FF) and/or short circuit current (JSC) instead, leading to an overall performance decline. By combining non-destructive photoluminescence imaging and drift-diffusion simulations, it is revealed that during photo-thermal ageing, unstable low-dimensional passivation fails within tens of hours, generating bulk defects, while unstable hole-transport-layer contacts induce interface defects within hours. Building on these findings, a robust hole-transport-layer polymer interface is employed and enhanced perovskite crystal quality to suppress both interface and bulk defect generation during ageing, achieving a T80 lifetime exceeding 1000 h under accelerated ageing conditions (85 °C and two-sun illumination).

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Contributing Institute(s):

1. Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien (IET-2)

Research Program(s):

1. 1213 - Cell Design and Development (POF4-121) (POF4-121)
2. 1214 - Modules, stability, performance and specific applications (POF4-121) (POF4-121)

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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 Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 25 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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