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

Kyung-Sang Cho (), Keun Heo, Chan-Wook Baik, Jun Young Choi, Heejeong Jeong, Sungwoo Hwang () and Sang Yeol Lee ()
Additional contact information
Kyung-Sang Cho: Samsung Advanced Institute of Technology, Device Lab
Keun Heo: Samsung Advanced Institute of Technology, Research Center for Time-Domain Nano-Functional Device
Chan-Wook Baik: Samsung Advanced Institute of Technology, Device Lab
Jun Young Choi: Korea University
Heejeong Jeong: Samsung Advanced Institute of Technology, Device Lab
Sungwoo Hwang: Samsung Advanced Institute of Technology, Device Lab
Sang Yeol Lee: Cheongju University

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: 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 time-resolved photoluminescence is attributed to the intermediate quantum dots buried in oxide layers. These results facilitate the realization of efficient color-selective detection exhibiting a photoconductive gain of 107, obtained using a room-temperature deposition of oxide layers and a solution process of quantum dots. This work offers promising opportunities in emerging applications for color detection with sensitivity, transparency, and flexibility.

Date: 2017
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-017-00893-x Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00893-x

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-017-00893-x

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().