The effect of photodetector configuration on the photoresponse properties
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College of Physics and Engineering, Qufu Normal University, Qufu 273165, China;
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2.
Ludong University, Yantai 264025, China
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Corresponding author:
LI Qing-shan, qsli@ytuc.edu.cn
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Received Date:
2007-12-04
Accepted Date:
2008-01-05
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Abstract
In order to study the photoresponse properties of photodetectors with different configuration, the ultraviolet photodetectors were prepared on ZnO substrate by means of pulsed laser deposition (PLD) method.It could be seen that the ZnO film was heteromorphic and had good stoichiometric composition and uniform crystal size of 60nm, under the X-ray diffraction (XRD) pattern, the photoluminescence (PL) spectrum and the scanning electron microscopy (SEM), respectively.After comparing the photoresponse characteristics of the photodetectors with planar electrode configuration and sandwiched electrode configuration,a conclusion can be drawn that the photodetector configuration has a great effect on the response time.Considering the competition between response time and responsivity in planar electrode configuration photodetectors, the sandwiched electrode configuration photodetectors with transparent electrode are preferable.
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