Single-crystalline cubic MgZnO films and their application in deep-ultraviolet optoelectronic devices

Wang, L. K.; Ju, Z. G.; Zhang, J. Y.; Zheng, J.; Shen, D. Z.; Yao, B.; Zhao, D. X.; Zhang, Z. Z.; Li, B. H.; Shan, C. X.
September 2009
Applied Physics Letters;9/28/2009, Vol. 95 Issue 13, p131113
Academic Journal
By employing a relatively low growth temperature and oxygen-rich conditions, single-crystalline cubic MgZnO films were prepared. A solar-blind deep ultraviolet (DUV) photodetector was finished on the MgZnO film. The maximum responsivity of the photodetector is 396 mA/W at 10 V bias, which is almost three orders of magnitude larger than the highest value ever reported in MgZnO-based solar-blind photodetectors. The dark current density is 1.5×10-11 A/cm2, comparable with the smallest value ever reported in solar-blind photodetectors. The improved performance reveals that the single-crystalline cubic MgZnO films have great potential applications in DUV optoelectronic devices.


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