Breaking the space charge limit in organic solar cells by a novel plasmonic-electrical concept.

ABSTRACT: As a fundamental electrostatic limit, space charge limit (SCL) for photocurrent is a universal phenomenon and of paramount importance for organic semiconductors with unbalanced photocarriers mobility and high exciton generation. Here we proposed a new plasmonic-electrical concept to manipulate electrical properties of organic devices including photocarriers recombination, transport and collection. As a proof-of-concept, organic solar cells (OSCs) comprising metallic planar and grating electrodes are systematically investigated with normal and inverted device structures. Interestingly, although strong plasmonic resonances induce abnormally dense photocarriers around a grating anode, the grating-inverted OSC is exempt from space charge accumulation (limit) and degradation of electrical prope

SUBMITTER: Sha WE 

PROVIDER: S-EPMC4148652 | biostudies-literature | 2014 Aug

REPOSITORIES: biostudies-literature