Dual detection of ultraviolet and visible lights using a DNA-CTMA/GaN photodiode with electrically different polarity

Title
Dual detection of ultraviolet and visible lights using a DNA-CTMA/GaN photodiode with electrically different polarity
Author(s)
장자순시바프래탑래디김봉중[김봉중]
Keywords
CHARGE-TRANSPORT; EMITTING-DIODES; LONG-RANGE; PHOTODETECTORS; PERFORMANCE; LAYER; GAN
Issue Date
201401
Publisher
OPTICAL SOC AMER
Citation
OPTICS EXPRESS, v.22, no.1, pp.908 - 915
Abstract
We demonstrated the dual-detectable DNA-CTMA/n-GaN photodiode (DG-PD) for ultraviolet and visible lights. Halogen and UV lamps are employed to recognize the visible and UV wavelength, respectively. The DG-PD under dark condition has a negative-bias shift of current-voltage (I-V) curves by 0.78 V compared to reference diode without DNA. However, the I-V curves move towards positive bias side by 0.75 V and 1.02 V for the halogen-and UV-exposed photodiode, respectively. These cause electrically different polarity and amount for halogen-and UVinduced photocurrents, indicating that the DNA-CTMA on n-GaN is quite effective for recognizing visible and UV lights as a dual-detectable photodiode. The formation and charge transport mechanisms are also discussed. (C) 2014 Optical Society of America
URI
http://hdl.handle.net/YU.REPOSITORY/33502http://dx.doi.org/10.1364/OE.22.000908
ISSN
1094-4087
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공과대학 > 전자공학과 > Articles
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