TY  - JOUR
AU  - Peng, Zijian
AU  - Wortmann, Jonas
AU  - Hong, Jisu
AU  - Zhou, Shuyu
AU  - Bornschlegl, Andreas J.
AU  - Haffner-Schirmer, Julian
AU  - Corre, Vincent M. Le
AU  - Heumüller, Thomas
AU  - Osvet, Andres
AU  - Rand, Barry P.
AU  - Lüer, Larry
AU  - Brabec, Christoph J.
TI  - Locating Non‐Radiative Recombination Losses and Understanding Their Impact on the Stability of Perovskite Solar Cells During Photo‐Thermal Accelerated Ageing
JO  - Advanced energy materials
VL  - 15
IS  - 35
SN  - 1614-6832
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2025-03322
SP  - 2502787
PY  - 2025
AB  - 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).
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001524906500001
DO  - DOI:10.1002/aenm.202502787
UR  - https://juser.fz-juelich.de/record/1044673
ER  -