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- W4308348910 abstract "The present p-i-n perovskite solar cells are less efficient than their n-i-p counterparts, fundamentally limited by deep-level traps of minority carriers at surfaces. Here, we explore perovskite/polymer multi-mode interactions by comparing the amine group’s various configurations and protonation states in the polyethylenimine (PEI) family. We correlate these interactions with specific deep-trap states by combining deep-level transient spectroscopy (DLTS) and density functional theory (DFT). We identify an in-situ protonation process that significantly reduces deep-level traps of minority carriers. The conventional ex-situ protonated and non-protonated groups do not exhibit this effect. For 1.55-eV p-i-n device, we achieve a high power conversion efficiency (PCE) of 24.3%. For 1.65-eV p-i-n devices directly applicable for tandem on silicon bottom cells, the PCE is improved from 19.4% to 22.3%. The cells exhibit no degradation in accelerated aging testing at 85°C for >1,000 h and maximum-power-point (MPP) tracking for >1,000 h." @default.
- W4308348910 created "2022-11-11" @default.
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- W4308348910 date "2022-12-01" @default.
- W4308348910 modified "2023-10-13" @default.
- W4308348910 title "Correlating the perovskite/polymer multi-mode reactions with deep-level traps in perovskite solar cells" @default.
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- W4308348910 doi "https://doi.org/10.1016/j.joule.2022.10.007" @default.
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