多金属氧酸盐
单层
材料科学
自组装
自组装单层膜
有机太阳能电池
纳米技术
化学
有机化学
催化作用
聚合物
复合材料
作者
Baobing Fan,Huanhuan Gao,Yanxun Li,Yiwen Wang,Chaowei Zhao,Francis Lin,Alex K.‐Y. Jen
出处
期刊:Joule
[Elsevier]
日期:2024-04-01
标识
DOI:10.1016/j.joule.2024.03.009
摘要
Summary
Organic solar cells (OSCs) with p-i-n structure have achieved rapid progress in efficiency recently. However, the p-i-n structure suffers from inferior stability owing to the hole-transporting layers (HTLs) that usually encounter unfavorable phase separation or insufficient anode coverage under aging. Herein, we develop a subtle strategy that integrates self-assembled monolayer (SAM) and polyoxometalate (POM) into an intimately intercalating composite as HTL. This sequentially deposited composite (SDC) shows a unique distribution pattern, with SAM enriched at the bottom and POM functioned as both void-filler and top-surface passivator, enabling improved surface contact. Moreover, the formation of multiple doping pathways increases the charge extraction in OSCs. The SDC-HTL strategy not only results in a much higher device efficiency, but it significantly impedes the photovoltage and fill-factor degradation in p-i-n OSCs under multiple stresses. This work demonstrates the superiority of integrating multiple ultra-thin HTLs for improving the interfacial contact between functional layers, thus addressing the instability in OSCs.
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