Nano Archive

Blue electroluminescence nanodevice prototype based on vertical ZnO nanowire/polymer film on silicon substrate

He, Ying and Wang, Jun-An and Chen, Xiao-Ban and Zhang, Wen-Fei and Zeng, Xu-Yu and Gu, Qiu-Wen (2009) Blue electroluminescence nanodevice prototype based on vertical ZnO nanowire/polymer film on silicon substrate. Journal of Nanoparticle Research, 12 (1). pp. 169-176.

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We present a polymer-complexing soft template technique to construct the ZnO-nanowire/polymer light emitting device prototype that exhibits blue electrically driven emission with a relatively low-threshold voltage at room temperature in ambient atmosphere, and the ZnO-nanowire-based LED’s emission wavelength is easily tuned by controlling the applied-excitation voltage. The nearly vertically aligned ZnO-nanowires with polymer film were used as emissive layers in the devices. The method uses polymer as binder in the LED device and dispersion medium in the luminescence layer, which stabilizes the quasi-arrays of ZnO nanowires embedding in a thin polymer film on silicon substrate and passivates the surface of ZnO nanocrystals, to prevent the quenching of luminescence. Additionally, the measurements of electrical properties showed that ZnO-nanowire/polymer film could significantly improve the conductivity of the film, which could be attributed to an increase in both Hall mobility and carrier concentration. The results indicated that the novel technique is a low-cost process for ZnO-based UV or blue light emission and reduces the requirement for achieving robust p-doping of ZnO film. It suggests that such ZnO-nanowire/polymer-based LEDs will be suitable for the electro-optical application.

Item Type:Article
Uncontrolled Keywords:Electroluminescence - ZnO nanowires - Nanodevice - Polymer-assisted self-assembling
Subjects:Physical Science > Nanoelectronics
Physical Science > Photonics
Engineering > Nanotechnology applications in ICT
ID Code:8133
Deposited By:IoN
Deposited On:12 Feb 2010 16:42
Last Modified:12 Feb 2010 16:42

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