Boosting photovoltaic performance of a benzobisthiazole based copolymer: a device approach using a zinc oxide electron transport layer

Abstract

The power conversion efficiency of organic photovoltaics of a benzobisthiazole/benzothiadiazole copolymer we have recently reported was significantly increased from 3.8% to 6.5%, by exploring the inverted cell structure (ZnO/polymer:fullerene/MoO_x/Ag), the use of [6,6]-phenyl C₇₁ butyric acid methyl ester (PC₇₁BM), and optimizing film thickness, which demonstrates an improved correlation with time-resolved microwave conductivity.