中国物理B ›› 2015, Vol. 24 ›› Issue (10): 107703-107703.doi: 10.1088/1674-1056/24/10/107703
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
宗仙丽, 朱荣
Zong Xian-Li (宗仙丽), Zhu Rong (朱荣)
摘要:
The ultraviolet (UV) photoresponses of ZnO nanorods directly grown on and between two micro Au-electrodes by using electric-field-assisted wet chemical method are measured comprehensively under different conditions, including ambient environment, applied bias voltage, gate voltage and temperature. Experimental results indicate that the photoresponses of the ZnO nanorods can be modulated by surface oxygen adsorptions, applied voltages, as well as temperatures. A model taking into account both surface adsorbed oxygen and electron-hole activities inside ZnO nanorods is proposed. The enhancement effect of the bias voltage on photoresponse is also analyzed. Experimental results shows that the UV response time (to 63%) of ZnO nanorods in air and at 59 ℃ could be shortened from 34.8 s to 0.24 s with a bias of 4 V applied between anode and cathode.
中图分类号: (ZnO)