活动层
材料科学
阳极
阴极
光电子学
能量转换效率
聚合物太阳能电池
聚合物
图层(电子)
基质(水族馆)
制作
丝网印刷
光伏系统
有机半导体
有机太阳能电池
转印
纳米技术
电极
复合材料
化学
电气工程
海洋学
医学
薄膜晶体管
替代医学
物理化学
病理
工程类
地质学
作者
Yong Joo Cho,Jun Yeob Lee,Stephen R. Forrest
摘要
We demonstrate that double stamp transfer printing of the poly(3-hexylthiophene) (P3HT):[6,6]-phenyl C61-butyric acid methyl ester (PCBM) active layer on MoO3 of an organic photovoltaic (OPV) cell enhances the charge collection efficiency at the anode and cathode contacts by creating a concentration gradient of the P3HT and PCBM across the bulk heterojunction active layer. This gradient increases the short circuit current and the power conversion efficiency of stamp-transferred P3HT:PCBM polymer OPVs by 23% compared with that of similarly structured spin-coated polymer OPVs due to the graded active layer composition, resulting in a power conversion efficiency of 3.7 ± 0.2% for an as-cast device. The stamp-transfer printing process provides a route to low cost fabrication of OPVs over large flexible substrate areas.
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