A Study on the UV Photoresponse of Hydrothermally Grown Zinc Oxide Nanorods With Different Aspect Ratios

Author

Al-Hardan, Naif H. ; Abdul Hamid, Muhammad Azmi ; Ahmed, Naser M. ; Jalar, Azman ; Shamsudin, Roslinda ; Othman, Norinsan Kamil ; Lim Kar Keng ; Mohammed, Sabah M.

Author_Institution

Sch. of Phys., Univ. Kebangsaan Malaysia, Bangi, Malaysia

Volume

15

Issue

12

fYear

2015

Firstpage

6811

Lastpage

6818

Abstract

We report on the effect of the aspect ratio of zinc oxide (ZnO) nanorods (NRs) prepared by the hydrothermal process. It was found that increasing the precursor molar amount resulted in the decrease of the aspect ratio of ZnO NRs. Furthermore, the aspect ratios showed a significant effect on the structural and optical properties of the prepared ZnO NRs. The ZnO NRs were fabricated into a metal-semiconductor-metal (MSM) UV photodetector. The performances of the prepared MSM ZnO NRs were also studied, and the high aspect ratio showed that the highest responsivity had a value of 33 A/W at a bias voltage of 5 V and a wavelength of 380 nm. The responsivity, rise time, and full time of the prepared ZnO NRs showed a trend of behavior as the molar amount of the precursor was varied.

Keywords

II-VI semiconductors; metal-semiconductor-metal structures; nanofabrication; nanorods; nanosensors; photodetectors; ultraviolet detectors; wide band gap semiconductors; zinc compounds; MSM UV photodetector; NR; UV photoresponse; ZnO; hydrothermally grown zinc oxide nanorod; metal-semiconductor-metal UV photodetector; optical property; precursor molar amount; structural property; voltage 5 V; wavelength 380 nm; II-VI semiconductor materials; Optical variables measurement; Photoconductivity; Photodetectors; Substrates; Wavelength measurement; Zinc oxide; Aspect ratios; Hydrothermal; UV photo detectors; ZnO nanorods; aspect ratios; hydrothermal;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2015.2464311

Filename

7185330