Low-Frequency Noise Performance of Al-Doped ZnO Nanorod Photosensors by a Low-Temperature Hydrothermal Method

Zi Hao Wang, Hsin-Chieh Yu, Chih Chiang Yang*, Hsin Ting Yeh, Yan Kuin Su

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

In this paper, we developed a simple hydrothermal method to synthesize vertically aligned ZnO:Al nanorods (NRs) to fabricate a UV photodetector (PD) on a seed layer/glass substrate. The photo-to-dark current ratio of the ZnO:Al NR PD was approximately 1.4 x 103 under 1-V bias and UV light irradiation (380 nm). The calculated responsivity of the fabricated PD was 181 A W-1 , and the UV-to-visible rejection ratio of the PD at 1-V applied bias was 1.51 x 103. In addition, flicker noise dominated the noise of the ZnO:Al NR PD. The noise-equivalent power and normalized detectivity of the ZnO:Al NR PD were 1.17 x 10-11 W and 4.03 x 1012 cm Hz0.5 W-1 , respectively.

Original languageEnglish
Article number7947195
Pages (from-to)3206-3212
Number of pages7
JournalIEEE Transactions on Electron Devices
Volume64
Issue number8
DOIs
StatePublished - 1 Aug 2017

Keywords

  • Aluminum
  • ZnO nanorods (NRs)
  • hydrothermal
  • low-frequency noise
  • photodetector (PD)

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