A low band-gap polymer based on unsubstituted benzo[1,2-b:4,5-b']dithiophene for high performance organic photovoltaics.
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.
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.
Jae Woong
JW
Jung
Jea Woong
JW
Jo
Feng
F
Liu
Thomas P
TP
Russell
Won Ho
WH
Jo