Quaterthiophene-based multipods as promising materials for solution-processible organic solar cells and field effect transistors

摘要

The preparation and characterization of novel electron donor compounds with two (D1) and four (D2) quaterthiophene-containing arms attached to the flexible carbosilanesiloxane core are described. These materials were investigated in organic field effect transistors and photovoltaic cells. A power conversion efficiency of ～0.9 obtained for D1:70PCBM blends is one of the highest values achieved up to now for solution-processible small molecular bulk heterojunction solar cells with large band-gap oligothiophene-based donor materials comprising no other chromophore units.