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Ultraviolet electroluminescence from controlled arsenic-doped ZnO nanowire homojunctions

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8 Author(s)
Zhang, Jun-Yan ; Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, People’s Republic of China ; Li, Ping-Jian ; Sun, Hui ; Shen, Xin
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ZnO nanowire arrays were grown on semi-insulating intrinsic GaAs substrates, and controlled arsenic-doping process was carried out to realize the n-ZnO/p-ZnO nanowire array/GaAs structures. The constructed ZnO nanowire homojunctions demonstrated a clear rectifying behavior and the turn-on voltage was above 4.0 V. The corresponding ultraviolet electroluminescence spectra were obtained for the applied forward voltage above 30 V (20 mA). The distinct ultraviolet electroluminescence peak, centered at 382 nm, is nonlinearly enhanced with an increase in the applied forward voltage. The origin of the strong ultraviolet electroluminescence was discussed in terms of the controlled arsenic-doping process.

Published in:

Applied Physics Letters  (Volume:93 ,  Issue: 2 )

Date of Publication:

Jul 2008

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