Light-modulated vertical heterojunction phototransistors with distinct logical photocurrents.

ABSTRACT: The intriguing carrier dynamics in graphene heterojunctions have stimulated great interest in modulating the optoelectronic features to realize high-performance photodetectors. However, for most phototransistors, the photoresponse characteristics are modulated with an electrical gate or a static field. In this paper, we demonstrate a graphene/C₆₀/pentacene vertical phototransistor to tune both the photoresponse time and photocurrent based on light modulation. By exploiting the power-dependent multiple states of the photocurrent, remarkable logical photocurrent switching under infrared light modulation occurs in a thick C₆₀ layer (11 nm) device, which implies competition of the photogenerated carriers between graphene/C₆₀ and C₆₀/pentacene. Meanwh

SUBMITTER: Han J 

PROVIDER: S-EPMC7509774 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature