%0 Journal Article
%A Peng, Zijian
%A Wortmann, Jonas
%A Hong, Jisu
%A Zhou, Shuyu
%A Bornschlegl, Andreas J.
%A Haffner-Schirmer, Julian
%A Corre, Vincent M. Le
%A Heumüller, Thomas
%A Osvet, Andres
%A Rand, Barry P.
%A Lüer, Larry
%A Brabec, Christoph J.
%T Locating Non‐Radiative Recombination Losses and Understanding Their Impact on the Stability of Perovskite Solar Cells During Photo‐Thermal Accelerated Ageing
%J Advanced energy materials
%V 15
%N 35
%@ 1614-6832
%C Weinheim
%I Wiley-VCH
%M FZJ-2025-03322
%P 2502787
%D 2025
%X 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).
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:001524906500001
%R 10.1002/aenm.202502787
%U https://juser.fz-juelich.de/record/1044673