A New Nonfullerene Acceptor with Near Infrared Absorption for High Performance Ternary-Blend Organic Solar Cells with Efficiency over 13.

ABSTRACT: A new acceptor-donor-acceptor (A-D-A) type nonfullerene acceptor, 3TT-FIC, which has three fused thieno[3,2-b]thiophene as the central core and difluoro substituted indanone as the end groups, is designed and synthesized. 3TT-FIC exhibits broad and strong absorption with extended onset absorption to 995 nm and a low optical bandgap of 1.25 eV. The binary device based on 3TT-FIC and the polymer PTB7-Th exhibits a power conversion efficiency (PCE) of 12.21% with a high short circuit current density (   J_sc) of 25.89 mA cm^-2. To fine-tune the morphology and make full use of the visible region sunlight, phenyl-C₇₁-butyricacid-methyl ester (PC₇₁BM) is used as the third component to fabricate ternary devices. I

SUBMITTER: Gao HH 

PROVIDER: S-EPMC6010751 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature