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- W4300865613 abstract "Despite the tremendous progress in the efficiency of Cu2ZnSn(S,Se)4 (CZTSSe) photovoltaic devices, open-circuit voltage (Voc) deficit, mainly related to the SnZn-related defects in the absorber, still remains one of the key issues that hinders the cell performance. To overcome this hurdle, here a facile synergistic post-deposition treatment (PDT) strategy in CZTSSe family via AgF-PDT after LiF-PDT in the photovoltaic absorber to suppress SnZn defects, and thus, to promote the Voc and power conversion efficiency (PCE), is reported. Furthermore, a mechanism for improving device efficiency of CZTSSe cell is also proposed. The in-depth investigation results demonstrate that Li/Ag co-doping reduces the band tailing characteristic, enlarges the depletion region width, and enhances the carrier transport and collection, resulting in a lower bulk and interface recombination. More importantly, Li/Ag co-doping strategy provides an effective method for SnZn defect passivation, thereby prolonging minority carrier lifetime in the ensuing devices and leading to enhancement in device performance. Correspondingly, the resulting Li/Ag co-doped device delivers a champion efficiency of 12.58% with an impressive Voc of 507 mV. This work explores an effective strategy to kill the SnZn-related defects, thereby overcoming the problems associated with the Voc deficit and lower cell efficiency in Kesterite-based photovoltaic devices." @default.
- W4300865613 created "2022-10-04" @default.
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- W4300865613 date "2022-10-03" @default.
- W4300865613 modified "2023-10-16" @default.
- W4300865613 title "Li/Ag Co‐Doping Synergistically Boosts the Efficiency of Kesterite Solar Cells Through Effective Sn <sub>Zn</sub> Defect Passivation" @default.
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- W4300865613 doi "https://doi.org/10.1002/admi.202201677" @default.
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