掺杂剂
材料科学
能量转换效率
钙钛矿(结构)
钝化
带隙
手套箱
兴奋剂
聚合物
化学工程
光电子学
图层(电子)
纳米技术
有机化学
复合材料
化学
工程类
作者
Zelong Zhang,Jianfei Fu,Qiaoyun Chen,Jiajia Zhang,Zhezhi Huang,Ji Cao,Wenxi Ji,Longgui Zhang,Ailian Wang,Yi Zhou,Bin Dong,Bo Song
出处
期刊:Small
[Wiley]
日期:2022-12-21
卷期号:19 (11)
被引量:16
标识
DOI:10.1002/smll.202206952
摘要
All-inorganic perovskite CsPbI3 contains no volatile organic components and is a thermally stable photoactive material for wide-bandgap perovskite solar cells (PSCs); however, CsPbI3 readily undergoes undesirable phase transitions due to the hygroscopic nature of the ionic dopants used in commonly used hole transport materials. In the current study, the popular donor material PM6 in organic solar cells is used as a hole transport layer (HTL). The benzodithiophene-based backbone-conjugated polymer requires no dopant and leads to a higher power conversion efficiency (PCE) than 2,2',7,7'-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene (Spiro-OMeTAD). Moreover, PM6 also shows priorities in hole mobility, hydrophobicity, cascade energy level alignment, and even defect passivation of perovskite films. With PM6 as the dopant-free HTL, the PSCs achieve a champion PCE of 18.27% with a competitive fill factor of 82.8%. Notably, the present PCE is based on the dopant-free HTL in CsPbI3 PSCs reported thus far. The PSCs with PM6 as the HTL retain over 90% of the initial PCE stored in a glovebox filled with N2 for 3000 h. In contrast, the PSCs with Spiro-OMeTAD as the HTL maintain ≈80% of the initial PCE under the same conditions.
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