Buffer layer of PEDOT:PSS/graphene composite for polymer solar cells

Bin Yin; Qian Liu; Liying Yang; Xiaoming Wu; Zunfeng Liu; Yulin Hua; Shougen Yin; Yongsheng Chen

doi:10.1166/jnn.2010.2107

Buffer layer of PEDOT:PSS/graphene composite for polymer solar cells

J Nanosci Nanotechnol. 2010 Mar;10(3):1934-8. doi: 10.1166/jnn.2010.2107.

Authors

Bin Yin¹, Qian Liu, Liying Yang, Xiaoming Wu, Zunfeng Liu, Yulin Hua, Shougen Yin, Yongsheng Chen

Affiliation

¹ Key Laboratory of Display Materials and Photoelectric Devices, Tianjin University of Technology, Ministry of Education, Institute of Material Physics, Tianjin University of Technology, Tianjin 300384, China.

PMID: 20355603
DOI: 10.1166/jnn.2010.2107

Abstract

High-efficiency polymer solar cells were made with a hydrophilic graphene oxide (GO) doped in poly(ethylene dioxythiophene) (PEDOT)-polystyrene sulfonic acid (PSS) composites using a structure of indium tin oxide/PEDOT:PSS:GO (40 nm)/poly(3-hexylthiophene-1,3-diyl) (P3HT)-[6,6]-phenyl-C61-butyric acid methyl ester (PCBM) (1:0.6, 100 nm)/LiF (1 nm)/Al (70 nm). The energy conversion efficiency eta was enhanced from 2.1 to 3.8% by doping GO into the PEDOT:PSS buffer layer under AM1.5G 100 mW cm(-2) illumination in air. The pre-annealing of GO makes energy conversion efficiency 1.8 times that of the device based on a pristine PEDOT:PSS buffer layer. Because of the low price and ease of preparation, soluble graphene will be a promising buffer layer used in photovoltaic applications. Furthermore, it can be used in other electronic applications.