Ultraviolet electroluminescence from hetero p-n junction between a single ZnO microsphere and p-GaN thin film

作者：Tetsuyama Norihiro; Fusazaki Koshi; Mizokami Yasuaki; Shimogaki Tetsuya; Higashihata Mitsuhiro; Nakamura Daisuke^*; Okada Tatsuo

来源：Optics Express, 2014, 22(8): 10026-10031.

DOI：10.1364/OE.22.010026

We report ultraviolet electroluminescence from a hetero p-n junction between a single ZnO microsphere and p-GaN thin film. ZnO microspheres, which have high crystalline quality, have been synthesized by ablating a ZnO sintered target. It was found that synthesized ZnO microspheres had a high-optical property and exhibit the laser action in the whispering gallery mode under pulsed optical pumping. A hetero p-n junction was formed between the single ZnO microsphere/ p-GaN thin film, and a good rectifying property with a turn-on voltage of approximately 6 V was observed in I-V characteristic across the junction. Ultraviolet and visible electroluminescence were observed under forward bias.

• 出版日期2014-4-21