Browsing by Author "Yang, Sheng-Chieh"

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Characterizations of low-temperature electroluminescence from ZnO nanowire light-emitting arrays on the p-GaN layer
(2010-12-15)
Lu, Tzu-Chun
;
Ke, Min-Yung
;
Yang, Sheng-Chieh
;
Cheng, Yun-Wei
;
Chen, Liang-Yi
Low-temperature electroluminescence from ZnO nanowire light-emitting arrays is reported. By inserting a thin MgO current blocking layer in between ZnO nanowire and p-GaN, high-purity UV light emission at wavelength 398 nm was obtained. As the temperature is decreased, contrary to the typical GaN-based light emitting diodes, our device shows a decrease of optical output intensity. The results are associated with various carrier tunneling processes and frozen MgO defects. (C) 2010 Optical Society of America