三元运算
材料科学
钝化
单层
有机太阳能电池
能量转换效率
光电子学
活动层
化学工程
图层(电子)
纳米技术
复合材料
聚合物
薄膜晶体管
计算机科学
工程类
程序设计语言
作者
Soyeong Jeong,Aniket Rana,Ju‐Hyeon Kim,Deping Qian,Kiyoung Park,Jun‐Ho Jang,Joel Luke,Sooncheol Kwon,Jehan Kim,Pabitra Shakya Tuladhar,Jinhyun Kim,Kwanghee Lee,James R. Durrant,Hongkyu Kang
标识
DOI:10.1002/advs.202206802
摘要
Abstract Herein, a new ternary strategy to fabricate efficient and photostable inverted organic photovoltaics (OPVs) is introduced by combining a bulk heterojunction (BHJ) blend and a fullerene self‐assembled monolayer (C 60 ‐SAM). Time‐of‐flight secondary‐ion mass spectrometry ‐ analysis reveals that the ternary blend is vertically phase separated with the C 60 ‐SAM at the bottom and the BHJ on top. The average power conversion efficiency ‐ of OPVs based on the ternary system is improved from 14.9% to 15.6% by C 60 ‐SAM addition, mostly due to increased current density ( J sc ) and fill factor ‐. It is found that the C 60 ‐SAM encourages the BHJ to make more face‐on molecular orientation because grazing incidence wide‐angle X‐ray scattering ‐ data show an increased face‐on/edge‐on orientation ratio in the ternary blend. Light‐intensity dependent J sc data and charge carrier lifetime analysis indicate suppressed bimolecular recombination and a longer charge carrier lifetime in the ternary system, resulting in the enhancement of OPV performance. Moreover, it is demonstrated that device photostability in the ternary blend is enhanced due to the vertically self‐assembled C 60 ‐SAM that successfully passivates the ZnO surface and protects BHJ layer from the UV‐induced photocatalytic reactions of the ZnO. These results suggest a new perspective to improve both performance and photostability of OPVs using a facial ternary method.
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