Reduced Bimolecular Recombination in Blade-Coated, High-Efficiency, Small-Molecule Solar Cells.

ABSTRACT: To realize the full promise of solution deposited photovoltaic devices requires processes compatible with high-speed manufacturing. We report the performance and morphology of blade-coated bulk heterojunction devices based on the small molecule donor p-DTS(FBTTh2)2 when treated with a post-deposition solvent vapor annealing (SVA) process. SVA with tetrahydrofuran improves the device performance of blade-coated films more than solvent additive processing (SA) with 1,8-diiodooctane. In spin-coating, SA and SVA achieve similar device performance. Our optimized, blade coated, SVA devices achieve power conversion efficiencies over 8 % and maintain high efficiencies in films up to ≈ 250 nm thickness, providing valuable resilience to small process variations in high-speed manufacturing. Using imp

SUBMITTER: Engmann S 

PROVIDER: S-EPMC5695694 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature