Color-selective photodetection from intermediate colloidal quantum dots buried in amorphous-oxide semiconductors.

ABSTRACT: We report color-selective photodetection from intermediate, monolayered, quantum dots buried in between amorphous-oxide semiconductors. The proposed active channel in phototransistors is a hybrid configuration of oxide-quantum dot-oxide layers, where the gate-tunable electrical property of silicon-doped, indium-zinc-oxide layers is incorporated with the color-selective properties of quantum dots. A remarkably high detectivity (8.1 × 10¹³ Jones) is obtained, along with three major findings: fast charge separation in monolayered quantum dots; efficient charge transport through high-mobility oxide layers (20 cm² V^-1 s^-1); and gate-tunable drain-current modulation. Particularly, the fast charge separation rate of 3.3 ns^-1 measured with tim

SUBMITTER: Cho KS 

PROVIDER: S-EPMC5635032 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature