Influence of the positions of thiophenes and side chains on diketopyrrolopyrrole based narrow band-gap small molecules for organic solar cells

High-performance asymmetric small molecular donor materials based on indenothiophene for solution-processed organic solar cells

“…Although a large number of SMs donor materials have been developed for OSCs, the building blocks for efficient SMs donor materials are limited to few symmetric units such as benzodithiophene [3,14] , dithienosilole [15,16] , indacenedithiophene [17,18] , and diketopyrrolopyrrole [19][20][21][22] . All the SMs mentioned above have symmetric structures.…”