Impact of fullerene derivative isomeric purity on the performance of inverted planar perovskite solar cells.

ABSTRACT: The effect of utilizing a pure cis-α-dimethoxy carbonyl fulleropyrrolidine C₇₀ (DMEC₇₀) isomer as the electron transporting material (ETM) in inverted perovskite solar cells (PSCs) was evaluated. The as-prepared C₇₀ mono-adduct products are mixtures of regioisomers and the interest was to evaluate them independently as ETMs. Three different cis-DMEC₇₀ isomers (α, β-endo and β-exo) (mix-DMEC₇₀) were synthesized and purified by HPLC. It was found that PSCs based on the pure α-DMEC₇₀ exhibit a substantially enhanced maximum power conversion efficiency (PCE) of 18.6% as compared to devices based on the mixed-DMEC₇₀ isomers that yielded a PCE of 16.4%. A maximum PCE of 15.7% was obser

SUBMITTER: Castro E 

PROVIDER: S-EPMC5958917 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature