Improving ternary blend morphology by adding a conjugated molecule into non-fullerene polymer solar cells.

ABSTRACT: The use of ternary polymer solar cells (PSCs) is a promising strategy to enhance photovoltaic performance while improving the fill factor (FF) of a device, but is still a challenge due to the complicated morphology. Herein, ternary PSCs are fabricated via adding the conjugated small molecule p-DTS(FBTTh₂)₂ into a well-known blended film, PTB7-Th:IEICO-4F. The ternary blend morphology and device characterization reveal that the addition of p-DTS(FBTTh₂)₂ can improve crystallinity and optimize morphology, leading to the FF of the optimized device increasing to 73.69%. In combination with the advantages of an ultra-narrow bandgap material, IEICO-4F, with a broad optical absorption spectrum, the optimized ternary solar cell exhib

SUBMITTER: Zhao D 

PROVIDER: S-EPMC9058428 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature