Flexible and Wavelength-Selective MoS2 Phototransistors with Monolithically Integrated Transmission Color Filters.

ABSTRACT: Color-selective or wavelength-tunable capability is a crucial feature for two-dimensional (2-D) semiconducting material-based image sensor applications. Here, we report on flexible and wavelength-selective molybdenum disulfide (MoS2) phototransistors using monolithically integrated transmission Fabry-Perot (F-P) cavity filters. The fabricated multilayer MoS2 phototransistors on a polyarylate substrate exhibit decent electrical characteristics (?FE?>?64.4?cm2/Vs, on/off ratio?>?106), and the integrated F-P filters, being able to cover whole visible spectrum, successfully modulate the spectral response characteristics of MoS2 phototransistors from ~495?nm (blue) to ~590?nm (amber). Furthermore, power dependence of both responsivity and specific detectivity shows similar trend with other reports, dominated by the photogating effect. When combined with large-area monolayer MoS2 for optical property enhancement and array processing, our results can be further developed into ultra-thin flexible photodetectors for wearables, conformable image sensor, and other optoelectronic applications.

SUBMITTER: Yoo G 

PROVIDER: S-EPMC5241883 | biostudies-other | 2017 Jan

REPOSITORIES: biostudies-other