A low band-gap polymer based on unsubstituted benzo[1,2-b:4,5-b']dithiophene for high performance organic photovoltaics

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

doi:10.1039/c2cc32985a

A low band-gap polymer based on unsubstituted benzo[1,2-b:4,5-b']dithiophene for high performance organic photovoltaics

Chem Commun (Camb). 2012 Jul 14;48(55):6933-5. doi: 10.1039/c2cc32985a. Epub 2012 Jun 7.

Authors

Jae Woong Jung¹, Jea Woong Jo, Feng Liu, Thomas P Russell, Won Ho Jo

Affiliation

¹ WCU Hybrid Materials Program and Department of Materials Science and Engineering, Seoul National University, San 56-1, Shillim-dong, Kwanak-ku, Seoul 151-744, Korea.

PMID: 22673629
DOI: 10.1039/c2cc32985a

Abstract

A low band-gap conjugated polymer, PBDTDPP, composed of unsubstituted benzo[1,2-b:4,5-b']dithiophene and diketopyrrolo[3,4-c]pyrrole was synthesized. The deep HOMO level of PBDTDPP enhances the V(OC) of a PSC up to 0.82 V and exhibits a PCE of 5.16%, while alkoxy substituted PBDTDPP-OR yields a PCE of 2.24% with a V(OC) of 0.61 V.