ZnO-Based Solar Blind Ultraviolet-C Photodetectors Using SiZnO Absorption Layer

Author

Ching-Ting Lee ; Tzu-Shun Lin

Author_Institution

Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan

Volume

27

Issue

8

fYear

2015

fDate

April15, 15 2015

Firstpage

864

Lastpage

866

Abstract

The p-ZnO:LiNO₃/i-SiZnO/n-ZnO:In (p-i-n) ZnO-based solar blind ultraviolet-C photodetectors were deposited by vapor cooling condensation system. In view of the high performances of the deposited ZnO-based films, the solar blind performance was resulted due to very low photoresponse in the visible (VIS) wavelength range. The ultraviolet (270 nm)/VIS (420 nm) rejection ratio of $1.01,\\times ,10^{4}$ was obtained. The dominant noise was flicker noise. Furthermore, the photoresponsivity of 0.260 A/W, the noise equivalent power of $3.54 \\times 10^{-12}$ W, and the specific detectivity of $2.67\\times 10^{11}$ cmHz $^{1/2}$ /W were obtained, when the photodetectors operated at a reverse bias voltage of −5 V.

Keywords

II-VI semiconductors; condensation; cooling; flicker noise; optical noise; photodetectors; semiconductor thin films; silicon compounds; ultraviolet detectors; ultraviolet spectra; visible spectra; zinc compounds; absorption layer; flicker noise; photoresponsivity; ultraviolet-visible rejection ratio; vapor cooling condensation system; visible wavelength range; voltage -5 V; wavelength 270 nm; wavelength 420 nm; zinc oxide-based film deposition; zinc oxide-based solar blind ultraviolet-C photodetectors; Cooling; Films; Noise; Photodetectors; Powders; Zinc oxide; Photoresponsivity; SiZnO films; Solar blind ultraviolet-C photodetectors; Vapor cooling condensation system; ZnO-based photodetectors; solar blind ultraviolet-C photodetectors; vapor cooling condensation system;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2015.2398418

Filename

7029053