Issue 17, 2014

High performance polymer solar cells based on a two dimensional conjugated polymer from alkylthienyl-substituted benzodifuran and benzothiadiazole

Abstract

A new low bandgap D–A copolymer PBDFTDTBT containing 4,8-bis(2-(2-ethylhexyl)thiophen-2-yl)-benzo[1,2-b;3,4-b′]difuran (BDFT) and 4,7-di(thiophen-2-yl)-5,6-dioctyloxybenzo[c][1,2,5]thiadiazole (DTBT) units was synthesized and characterized for application as a donor material in polymer solar cells (PSCs). The PBDFTDTBT film showed a broad absorption band from 300 nm to around 730 nm in the visible light region and the hole mobility of the blend of PBDFTDTBT and PC71BM reached up to 0.36 cm2 V−1 s−1 by using the space charge limited current (SCLC) method. The PSCs based on PBDFTDTBT:PC71BM (1:1.5, w/w) exhibited a promising power conversion efficiency (PCE) of 6.0% under the illumination of AM 1.5 G, 100 mW cm−2 with a high short circuit current density (Jsc) of 12.04 mA cm−2 and an open circuit voltage (Voc) of 0.76 V.

Graphical abstract: High performance polymer solar cells based on a two dimensional conjugated polymer from alkylthienyl-substituted benzodifuran and benzothiadiazole

Article information

Article type
Paper
Submitted
19 Mar 2014
Accepted
01 May 2014
First published
02 May 2014

Polym. Chem., 2014,5, 5002-5008

Author version available

High performance polymer solar cells based on a two dimensional conjugated polymer from alkylthienyl-substituted benzodifuran and benzothiadiazole

B. Liu, B. Qiu, X. Chen, L. Xiao, Y. Li, Y. He, L. Jiang and Y. Zou, Polym. Chem., 2014, 5, 5002 DOI: 10.1039/C4PY00392F

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