학술논문
Microstructural-dependent photovoltaic properties of polymer solar cells based on different fullerene derivatives
Document Type
Conference
Source
2014 21st International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD) Active-Matrix Flatpanel Displays and Devices (AM-FPD), 2014 21st International Workshop on. :253-255 Jul, 2014
Subject
Language
Abstract
Chlorobenzene, o-dichlorobenzene, and 1,2,4-trichlorobenzene were used as solvents to fabricate active layers of poly(3-hexylthiophene) (P3HT) and fullerene derivatives for polymer solar cells. The fullerene derivatives employed in this study include indene-C 60 bisadduct (ICBA) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). The microstructural features of P3HT:ICBA and P3HT:PCBM thin films were studied using spectroscopy methods. Results show that an overgrowth of P3HT crystallites and the longer effective conjugation length of P3HT chains in thin films can reduce the power conversion efficiency of devices. The presence of ICBA in thin films can limit the growth of P3HT crystallites, which results in a higher fill factor of the ICBA-based devices compared with PCBM-based devices.