| Title | Boosting Perovskite Solar Cells Efficiency and Stability: Interfacial Passivation of Crosslinked Fullerene Eliminates the "Burn-in" Decay |
|---|---|
| ID_Doc | 17440 |
| Authors | Ding, CZ; Yin, L; Wang, JL; Larini, V; Zhang, LP; Huang, R; Nyman, M; Zhao, LY; Zhao, C; Li, WS; Luo, Q; Shen, YB; Österbacka, R; Grancini, G; Ma, CQ |
| Title | Boosting Perovskite Solar Cells Efficiency and Stability: Interfacial Passivation of Crosslinked Fullerene Eliminates the "Burn-in" Decay |
| Year | 2023 |
| Published | Advanced Materials, 35, 2 |
| Abstract | Perovskite solar cells (PSCs) longevity is nowadays the bottleneck for their full commercial exploitation. Although lot of research is ongoing, the initial decay of the output power - an effect known as "burn-in" degradation happening in the first 100 h - is still unavoidable, significantly reducing the overall performance (typically of >20%). In this paper, the origin of the "burn-in" degradation in n-i-p type PSCs is demonstrated that is directly related to Li+ ions migration coming from the SnO2 electron transporting layer visualized by time-of-flight secondary ion mass spectrometry (TOF-SIMS) measurements. To block the ion movement, a thin cross-linked [6,6]-phenyl-C61-butyric acid methyl ester layer on top of the SnO2 layer is introduced, resulting in Li+ immobilization. This results in the elimination of the "burn-in" degradation, showing for the first time a zero "burn-in" loss in the performances while boosting device power conversion efficiency to >22% for triple-cation-based PSCs and >24% for formamidinium-based (FAPbI(3)) PSCs, proving the general validity of this approach and creating a new framework for the realization of stable PSCs devices. |
| https://research.abo.fi/files/49148543/Advanced_Materials_2022_Ding_Boosting_Perovskite_Solar_Cells_Efficiency_and_Stability_Interfacial_Passivation_of.pdf |
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