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- W4308522084 abstract "• PSCs shows strong carrier transfer in the p-p + built-in electric field. • CsGeI 3 /CsPbI 3 laminated structure enhances the optical absorption of devices. • CsGeI 3 replaces organic HTL to form all-inorganic PSCs. With the development of perovskite solar cells (PSCs) technology, inorganic perovskite led by CsPbI 3 gradually shows the photovoltaic performance of organic perovskite cells. However, this is still based on the organic charge transport layer. CsPbI 3 with all-inorganic structure still need to be further studied. Therefore, in this study, an all inorganic CsGeI 3 /CsPbI 3 laminated structure with CsGeI 3 instead of organic HTL is introduced, and numerical simulation is carried out through SCAPS-1D (Solar Cells Capability Simulator). It is found that the two perovskite layers, which are both p-type materials, have shown excellent efficiency in the p-p + built-in electric field. In this paper, PSCs are optimized with absorbing layer thickness, doping concentration, defect density, metal electrode work function and so on. The best thickness is determined according to the different light absorption properties of Pb 2+ and Ge 2+ , and the toxicity of the original single-layer lead based perovskite is reduced. Through the comprehensive analysis of band bending, built-in electric field and recombination rate, we explained the reason why the parameters increase with the growth of doping concentration (N A ). In terms of N A regulation, it is found through simulation that when N A of the two absorption layers is at 10 15 to 10 18 cm −3 , the photogenerated carriers are driven by the strong p-p + built-in electric field to migrate well in the flat energy band, which significantly improves the photovoltaic performance of PSCs. For the defect density the charge transport layer, the PSC absorption characteristics, and the metal electrodes, we made a choice based on the photovoltaic performance and process level. Finally, the power conversion efficiency of the optimized PSCs reached 24.06 % and the fill factor is 86.19 %. This study proved that p-p + structure constructed by lead germanium mixed metal has great potential for inorganic perovskite solar cells with Cs as a cation in the future." @default.
- W4308522084 created "2022-11-12" @default.
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- W4308522084 date "2022-11-01" @default.
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- W4308522084 title "Theoretical analysis of all-inorganic solar cells based on numerical simulation of CsGeI3/CsPbI3 with p-p+ built-in electric field" @default.
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- W4308522084 doi "https://doi.org/10.1016/j.solener.2022.10.039" @default.
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