Regioisomer effects of [70]fullerene mono-adduct acceptors in bulk heterojunction polymer solar cells.

ABSTRACT: Despite numerous organic semiconductors being developed during the past decade, C₇₀ derivatives are predominantly used as electron acceptors in efficient polymer solar cells (PSCs). However, as-prepared C₇₀ mono-adducts intrinsically comprise regioisomers that would mask individual device performances depending on the substituent position on C₇₀. Herein, we separate the regioisomers of C₇₀ mono-adducts for PSC applications for the first time. Systematic investigations of the substituent position effect using a novel symmetric C₇₀ mono-adduct ([70]NCMA) and a prevalent, high-performance one ([70]PCBM) reveals that we can control the structures of the blend films with conjugated polymers and thereby improve the PSC performances by regioi

SUBMITTER: Umeyama T 

PROVIDER: S-EPMC5308288 | biostudies-literature | 2017 Jan

REPOSITORIES: biostudies-literature