Medium Bandgap Conjugated Polymer for High Performance Polymer Solar Cells Exceeding 9% Power Conversion Efficiency

Jae Woong Jung; Feng Liu; Thomas P Russell; Won Ho Jo

doi:10.1002/adma.201503902

Medium Bandgap Conjugated Polymer for High Performance Polymer Solar Cells Exceeding 9% Power Conversion Efficiency

Adv Mater. 2015 Dec 2;27(45):7462-8. doi: 10.1002/adma.201503902. Epub 2015 Oct 9.

Authors

Jae Woong Jung¹, Feng Liu², Thomas P Russell², Won Ho Jo¹

Affiliations

¹ Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 151-744, South Korea.
² Department of Polymer Science and Engineering, University of Massachusetts, Amherst, MA, 01003, USA.

PMID: 26449184
DOI: 10.1002/adma.201503902

Abstract

Two medium-bandgap polymers composed of benzo[1,2-b:4,5-b']dithiohpene and 2,1,3-benzothiadiazole with 6-octyl-thieno[3,2-b]thiophene as a π-bridge unit are synthesized and their photovoltaic properties are analyzed. The two polymers have deep highest occupied molecular orbital energy levels, high crystallinity, optimal bulk-heterojunction morphology, and efficient charge transport, resulting in a power conversion efficiency of as high as 9.44% for a single-junction polymer solar-cell device.

Keywords: conjugated polymers; polymer solar cells; power conversion efficiency.