NDLI: Annealing Effects on the Structural, Optical, and UV Photoresponse Properties of ZnO Nanostructures Prepared by RF-Magnetron Sputtering at Different Deposition Temperatures

Content Provider	Springer Nature Link
Author	Al Salman, Husam S. Abdullah, M. J.
Copyright Year	2014
Abstract	Undoped ZnO nanostructures were deposited on SiO$_{2}$/Si substrates via radio frequency magnetron sputtering at different deposition temperatures (room temperature, 200, 300, and 400 °C). The prepared samples were annealed at 500 °C for 2 h under an N$_{2}$ flow. The structural, surface morphological, optical, and photoresponse characteristics of ZnO nanostructures as deposited and after annealing were then investigated. The energy bandgaps of all samples after annealing (3.22–3.28 eV) decreased compared with those of the as-deposited specimens. The barrier height increased when the deposition temperature increased and reached 0.77 eV at 400 °C after annealing with a leakage current of 0.17 µA at a 5 V bias. The UV photodetector device which was deposited at the optimal temperature of 300 °C, has 12.51 × 10$^{3}$% photosensitivity, 2.259 µA dark current, 0.508 s response time, and 0.466 s recovery time. The dark current significantly decreased for all samples after annealing. The proposed UV photodetectors exhibit high performance, high photosensitivity, shorter response and recovery times, and excellent stability at lower bias voltages of 5 and 2 V.
Starting Page	230
Ending Page	242
Page Count	13
File Format	PDF
ISSN	10067191
Journal	Acta Metallurgica Sinica (English Letters)
Volume Number	28
Issue Number	2
e-ISSN	21941289
Language	English
Publisher	The Chinese Society for Metals
Publisher Date	2014-12-21
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Spectroscopy/Spectrometry Tribology, Corrosion and Coatings Undoped ZnO Annealing effect Organometallic Chemistry Characterization and Evaluation of Materials Deposition temperatures UV photoresponse Metallic Materials Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Metals and Alloys

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