High-Performance Organic Solar Cells Based on a Small Molecule with Alkylthio-Thienyl-Conjugated Side Chains without Extra Treatments

Chaohua Cui; Xia Guo; Jie Min; Bing Guo; Xiao Cheng; Maojie Zhang; Christoph J Brabec; Yongfang Li

doi:10.1002/adma.201503815

High-Performance Organic Solar Cells Based on a Small Molecule with Alkylthio-Thienyl-Conjugated Side Chains without Extra Treatments

Adv Mater. 2015 Dec 2;27(45):7469-75. doi: 10.1002/adma.201503815. Epub 2015 Oct 13.

Authors

Chaohua Cui¹, Xia Guo¹, Jie Min², Bing Guo¹, Xiao Cheng¹, Maojie Zhang¹, Christoph J Brabec², Yongfang Li^{1

3}

Affiliations

¹ Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
² Institute of Materials for Electronics and Energy Technology (I-MEET), Friedrich-Alexander-University Erlangen-Nuremberg, Martensstraße 7, 91058, Erlangen, Germany.
³ Beijing National Laboratory of Molecular Sciences, CAS Key Laboratory of Organic, Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.

PMID: 26476709
DOI: 10.1002/adma.201503815

Abstract

A new 2D-conjugated small molecule with alkylthio-thienyl-conjugated side chains (BDTT-S-TR) is synthesized for application as a donor material in organic solar cells (OSCs). The OSCs based on BDTT-S-TR/PC70 BM demonstrate a power conversion efficiency (PCE) of 9.20% without extra treatment. Moreover, an encouraging PCE of 6.68% is achieved from the device with active area of 144 mm(2).

Keywords: conjugated side chains; organic molecules; organic solar cells; solution processability.