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Crabwise ZnO Nanowire UV Photodetector Prepared on ZnO : Ga/Glass Template

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8 Author(s)
Hsueh, T.J. ; Nat. Cheng Kung Univ., Tainan ; Hsu, C.L. ; Chang, S.J. ; Lin, Y.R.
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Vertical well-aligned and crabwise ZnO nanowires were prepared on patterned ZnO:Ga/glass substrates by reactive evaporation method under different growth conditions. The average length and diameter of vertical well-aligned ZnO nanowires were around 1 mum and 50-100 nm, respectively. In contrast, the average length and diameter of crabwise ZnO nanowires were around 5 mum and 30 nm, respectively. Upon illumination with UV light (lambda = 362 nm), it was found that measured responsivities were 0.015 and 0.03 A/W for the crabwise ZnO nanowire photodetector biased at 10 and 15 V, respectively. Furthermore, a rejection ratio of approximately 10 was obtained for the crabwise ZnO nanowire photodetector with an applied bias of 10 V.

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Nanotechnology, IEEE Transactions on  (Volume:6 ,  Issue: 6 )