苯乙胺
降级(电信)
钙钛矿(结构)
卤化物
能量转换效率
材料科学
甲基丙烯酸甲酯
制作
光伏系统
化学工程
钝化
聚合物
纳米技术
化学
光电子学
复合材料
有机化学
立体化学
工程类
单体
图层(电子)
生态学
计算机科学
替代医学
医学
电信
生物
病理
作者
Seri Lee,Gyu Min Kim,Tsutomu Miyasaka,Se Young Oh
出处
期刊:Solar RRL
[Wiley]
日期:2023-01-26
卷期号:7 (7)
被引量:3
标识
DOI:10.1002/solr.202201002
摘要
Phenethylamine (PEA) halides (X) coated on perovskite (PVK) films are widely known as passivating layers, resulting in high performance in perovskite solar cells (PSCs). However, critical stability issues associated with phenethylamine halides (PEAX) in PSCs are observed, especially with Spiro‐OMeTAD, which prevented its practical use. Here, the mechanism by which PEAX negatively affects PSCs is reported. In addition, a method is devised to overcome the stability issue by employing poly(methyl methacrylate) (PMMA) at the PVK/PEABr interface to form dual PMMA/PEABr interlayers. Contrary to the general use of PEABr, the indirect contact of PEABr with PVK films by PMMA resulted in superior power conversion efficiencies (PCEs) and enhanced stability resulting from the retention of dipole moments even under aging. Further, effective methods of maximizing and retaining the dipole effect by heating PMMA/PEAX, as opposed to PSCs incorporating PEAX without PMMA being negatively affected by heat are exploited. The resulting PSCs with PMMA/heated PEABr exhibit a PCE of 21.63%, and retain 95% of their original performance a month after fabrication.
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