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Ultraviolet photodetectors based on ZnO nanoparticles

Authors
Jun, Jin HyungSeong, HojunCho, KyoungahMoon, Byung-MooKim, Sangsig
Issue Date
9월-2009
Publisher
ELSEVIER SCI LTD
Keywords
Optoelectrical properties; ZnO; Nanoparticles; Photodetectors
Citation
CERAMICS INTERNATIONAL, v.35, no.7, pp.2797 - 2801
Indexed
SCIE
SCOPUS
Journal Title
CERAMICS INTERNATIONAL
Volume
35
Number
7
Start Page
2797
End Page
2801
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/119367
DOI
10.1016/j.ceramint.2009.03.032
ISSN
0272-8842
Abstract
Ultraviolet (UV) photodetectors based on ZnO nanoparticles (NPs) were fabricated and their optoetectronic properties were examined. The dominant photoluminescence (PL) peak of the ZnO NPs was located at a wavelength of 380 nm under the illumination of 325-nm wavelength light. The direct bandgap transition of the charge carriers at lambda = 380 nm contributed to the photocurrent. The ratio of the photocurrent to the dark current (on/off ratio) was as high as 10(6), which is favorable for photodetectors. The decay time constant in the photoresponse was relatively small, while the rise time constant was relatively large. The reasons for the high on/off ratio and photoresponse characteristics are discussed in this paper. (C) 2009 Elsevier Ltd and Techna Group S.r.l. All fights reserved.
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