Arrayed CdTeMicrodots and Their Enhanced Photodetectivity via Piezo-Phototronic Effect.

ABSTRACT: In this paper, a photodetector based on arrayed CdTe microdots was fabricated on Bi coated transparent conducting indium tin oxide (ITO)/glass substrates. Current-voltage characteristics of these photodetectors revealed an ultrahigh sensitivity under stress (in the form of force through press) while compared to normal condition. The devices exhibited excellent photosensing properties with photoinduced current increasing from 20 to 76 μA cm^-2 under stress. Furthermore, the photoresponsivity of the devices also increased under stress from 3.2 × 10^-4 A/W to 5.5 × 10^-3 A/W at a bias of 5 V. The observed characteristics are attributed to the piezopotential induced change in Schottky barrier height, which actually results from the piezo-phototronic effect. The ob

SUBMITTER: Lee DJ 

PROVIDER: S-EPMC6409905 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature