二亚胺
苝
材料科学
钙钛矿(结构)
钝化
聚合物
聚合物太阳能电池
化学工程
降级(电信)
掺杂剂
光电子学
纳米技术
兴奋剂
复合材料
分子
化学
有机化学
图层(电子)
工程类
电信
计算机科学
作者
Qiang Fu,Xingchen Tang,Yuping Gao,Huan Liu,Mingqian Chen,Rui Wang,Zonglong Song,Yang Yang,Jian Wang,Yongsheng Liu
出处
期刊:Small
[Wiley]
日期:2023-03-14
卷期号:19 (24)
被引量:8
标识
DOI:10.1002/smll.202301175
摘要
The hygroscopic dopants used in Spiro-OMeTAD hole transport material (HTM) in state-of-the-art perovskite solar cells (PSCs) inevitably induce premature degradation of the devices. Here, two multifunctional polymer interface materials based on the perylene diimides (PDI) unit are developed. It is found that quasi-two-dimensional (2D) polymer 2DP-PDI can form a denser film and exhibit better hydrophobicity than linear polymer P-PDI. Importantly, 2DP-PDI can passivate the surface defects and extract hole carriers of perovskite film more effectively, leading to much reduced nonradiative recombination loss. With polymer interface material between the perovskite and HTM layers, the optimized device using 2DP-PDI and P-PDI yields a champion PCE of 24.20% and 23.09%, respectively, along with significantly improved stability, whereas the control device shows a lower efficiency of 22.23%. These results suggest that developing multifunctional polymer interface materials can be a promising strategy to improve the efficiency and stability of PSCs.
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