Abstract
The photvoltaic performance of polymer solar cell (PSC) with a three-component active layer was studied. The incorporation of 4-cyano-4’-octylbiphenyl (8CB) as an additive to a P3HT [poly(3-hexylthiophene)]:PC61BM [[6,6]-phenyl-C61-butyric acid methyl ester] blend film led to a higher absorbance, larger crystal size, closer packing of P3HT, and hence enhanced hole mobility. The power conversion efficiency of the PSC with the three-component active layer (P3HT: PC61BM:8CB blend film) was improved by over 30% compared to that of the reference device without 8CB, due to an enhancement in all parameters such as short circuit current, open circuit voltage and fill factor.
Acknowledgment
This work was supported by research grants from the Catholic University of Daegu in 2014.