20.500.12556/RUL-179444 500+ FACs perovskite solar cells under long-term stability testing The long-term stability of more than 500 FACs perovskite solar cells has been systematically investigated under various conditions. We first analyze resilience to moisture and show that with the 30 nm Al$_2$O$_3$ capping, we can perform long-term tests in air and eliminate moisture-related degradation. In the long-term MPP tracking tests, we then confirm that light is the driving degradation contributor by performing cyclic tests and testing under different light intensities. Visual changes of the perovskite absorber during the testing and spatial and spectral photoluminescence measurements reveal that phase segregation and the perovskite/C$_{60}$ interface are the main culprits for degradation, while the perovskite degrades faster in electrically inactive areas. We thus show that by removing bromide ions from the FACs composition, cell stability, evaluated by the t$_{80}$ lifetime, can improve 5-fold in the best case and that there is a linear correlation between t$_{80}$ time and bias voltage during stability tracking. By testing a large number of samples (>500), we show with statistical relevance that long-term stability measurements show significantly higher spread (both batch-to-batch and intrabatch) than J–V measurements. perovskite solar cells long-term stability maximum power point tracking moisture and light degradation voltage bias degradation photoluminescence degradation layers perovskites solar cells stability perovskitne sončne celice dolgoročna stabilnost sledenje točki maksimalne moči degradacija zaradi vlage in svetlobe degradacija zaradi napetosti fotoluminiscenca true false true Angleški jezik Slovenski jezik Članek v reviji 2026-02-13 13:21:59 2026-02-13 13:22:04 2026-03-19 04:46:19 0000-00-00 00:00:00 2026 0 0 Str. 3946–3955 iss. 2 Vol. 18 2026 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 0000-00-00 621.383.51:549.641 1944-8252 10.1021/acsami.5c24756 268429571 500-facs-perovskite-solar-cells-under-long-term-stability-testing.pdf 500-facs-perovskite-solar-cells-under-long-term-stability-testing.pdf 1 61DFA33AE0EFC2694A447C2E4DC2734E b8682a2829320283ea140e3bfa26b8064a0583b39afccc38e76dfa29d78176ea efd5cbed-22ce-11f1-b0ab-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=230817 https://pubs.acs.org/doi/10.1021/acsami.5c24756 1 7090c077-08d6-11f1-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=227963 Fakulteta za elektrotehniko 0 0 0