TY  - CONF
AU  - Peng, Zijian
AU  - Lüer, Larry
AU  - Brabec, Christoph
TI  - Locating the non-radiative recombination losses of perovskite solar cells during accelerated ageing
PB  - FUNDACIO DE LA COMUNITAT VALENCIANA SCITO València
M1  - FZJ-2025-03328
SP  -  
PY  - 2025
AB  - The commercialization of perovskite solar cells (PSCs) depends on breakthroughs in stability, yet the complex degradation mechanisms complicate the study of their long-term performance. This work investigates the role of non-radiative recombination in PSC stability by establishing a quantitative link between defect-related parameters and device performance. We found that defect-induced minor losses in open-circuit voltage (VOC) are accompanied by significant reductions in charge extraction efficiency (short-circuit current and fill factor). Through non-destructive, contactless photoluminescence characterization, we decoupled non-radiative recombination effects in various perovskite stacks before and after accelerated ageing. The quasi-Fermi level splitting (QFLS) losses in devices during the ageing process primarily originate from the perovskite bulk rather than the interfaces, with most of these losses occurring within the first 50 hours of ageing. We find that optimizing perovskite composition and improving crystal quality to suppress defect formation during ageing can extend photo-thermal stability by more than a factor of 50.
T2  - 12º nternational Conference on Hybrid and Organic Photovoltaics
CY  - 12 May 2025 - 14 May 2025, Roma (Italy)
Y2  - 12 May 2025 - 14 May 2025
M2  - Roma, Italy
LB  - PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
DO  - DOI:10.29363/nanoge.hopv.2025.003
UR  - https://juser.fz-juelich.de/record/1044679
ER  -