Drop-coating produces efficient CsPbl2Br solar cells

• 作者: Hanrui Xiao Chuantian Zuo Fangyang Liu Liming Ding
• 来源期刊: 半导体学报（英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: SHORT COMMUNICATION
• 页码范围: 23-25
• 页数: 3页
• 语种: 英文
• DOI: 10.1088/1674-4926/42/5/050502

摘要

Inorganic perovskites (CsPbX3, X =halide anion), containing no volatile organic cations, exhibit better thermal stability than organic-inorganic hybrid perovskites[1, 2].Among inorganic perovskites, α-CsPbl3 (cubic phase) possesses a relatively suitable bandgap of ～1.7 eV.CsPbl3 perovskite solar cells (PSCs) have demonstrated power conversion efficiencies (PCEs) over 20％[3-5].However, either in ambient atmosphere or in glovebox, α-CsPbl3 tends to transform into a non-photoactive 6-phase (orthorhombic phase) at room temperature, leading to degraded device performance[6-8].Replacing I-with smaller Br-can stabilize the cubic phase due to the increased Goldschmidt tolerance factor.Yet the bandgap will increase from ～1.7 eV (CsPbl3) to ～2.3 eV (CsPbBr3), resulting in insufficient light absorption[9-12].