Noise Properties of Fe-ZnO Nanorod Ultraviolet Photodetectors

Author

Shoou-Jinn Chang ; Chung-Wei Liu ; Chih-Hung Hsiao ; Kuang-Yao Lo ; Sheng-Joue Young ; Tsung-Hsien Kao ; Kai-Shiang Tsai ; San-Lein Wu

Author_Institution

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

Volume

25

Issue

21

fYear

2013

fDate

Nov.1, 2013

Firstpage

2089

Lastpage

2092

Abstract

This letter reports the development of Fe-doped ZnO (FZO) nanorods via a low-temperature hydrothermal method and the fabrication of FZO nanorod metal-semiconductor-metal (MSM) photodetector (PD). The average length and diameter of the FZO nanorods were 4.5 μm and ~ 100 nm, respectively. The ultraviolet-to-visible rejection ratio of the sample was ~ 23 when biased at 1 V, and the fabricated PD was visible-blind with a sharp cut-off at 375 nm. Furthermore, the noise equivalent power and detectivity of the fabricated FZO nanorod MSM PD were 6.27×10^-10 W and 2.12×10¹⁰ cm·Hz^0.5·W^-1, respectively.

Keywords

II-VI semiconductors; iron; metal-semiconductor-metal structures; nanophotonics; nanorods; optical fabrication; optical noise; photodetectors; ultraviolet detectors; wide band gap semiconductors; zinc compounds; MSM PD; ZnO:Fe; low-temperature hydrothermal method; metal-semiconductor-metal photodetector; nanorod diameter; nanorod length; nanorod ultraviolet photodetectors; noise equivalent power; noise properties; size 100 nm; size 4.5 mum; ultraviolet-to-visible rejection ratio; visible-blind PD; voltage 1 V; wavelength 375 nm; Current measurement; Noise; Photodetectors; Semiconductor device measurement; Temperature; Temperature measurement; Zinc oxide; FZO nanorod; hydrothermal; noise; photodetector;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2281467

Filename

6600756