基于碳电极的CsPbBr3同质结太阳能电池的模拟研究以提升性能

Abstract All-inorganic perovskite solar cells (PSCs), especially all bromide CsPbBr 3 , are attracting tremendous attention recently. However, currently there is a large efficiency gap between the experimentally reported power conversion efficiencies (PCEs) and theoretical PCE of CsPbBr 3 PSCs. To shed light on further optimizing the PCEs of CsPbBr 3 PSCs, device simulation using SCAPS-1D is carried out in this study. Hole transport layer free CsPbBr 3 PSCs with a single n-type or p-type CsPbBr 3 film are firstly studied and compared with those results from experiments. Then CsPbBr 3 homojunction solar cells using both n-type and p-type CsPbBr 3 films are further constructed. The influence of p-type CsPbBr 3 film thickness and doping concentration on the performances of the corresponding CsPbBr 3 PSCs are analyzed and discussed in detail. Finally, a champion PCE of 13.87 % could be obtained in FTO/TiO 2 /n-type CsPbBr 3 (700 nm)/p-type CsPbBr 3 (100 nm)/carbon device when the p-type CsPbBr 3 film is doped at a concentration of 1 × 10 18 cm −3 .