钙钛矿(结构)
材料科学
带隙
光电效应
光电子学
加合物
电极
透射率
能量转换效率
化学工程
纳米技术
有机化学
化学
工程类
物理化学
作者
Min Wang,Fengren Cao,Meng Wang,Kaiming Deng,Liang Li
标识
DOI:10.1002/adma.202006745
摘要
Abstract Thanks to the tunable bandgap and excellent photoelectric characteristics, perovskites have been widely used in semitransparent solar cells (ST‐SCs). Most works present unsatisfactory power conversion efficiencies (PCEs) through reducing the thickness of the perovskite films because there is a trade‐off between PCE and average visible transmittance (AVT). As a consequence, most PCEs are less than 12% when the AVT is higher than 20% due to the limited voltage ( V oc ) and short‐circuit current ( J sc ). Herein, a strategy of intermediate adduct (IMAT) engineering is developed to improve the film quality of the inorganic perovskite CsPbI 2 Br, which is a challenging issue to limit its performance of efficiency and stability. A normal n–i–p‐structured PSC based on the optimal CsPbI 2 Br film delivers a PCE of 16.02% with excellent stability. Furthermore, through optimizing the electrode type and interface, the ST‐PSC shows a high V oc larger than 1.2 V and the PCE reaches 14.01% and 10.36% under an AVT of 31.7% and 40.9%, respectively. This is the first demonstration of a CsPbI 2 Br ST‐PSC, and it outperforms most of other types of perovskites.
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