环境气氛对二维超薄ZnO纳米片紫外探测器性能的影响

二维宽带隙半导体材料独特的纳米结构是高性能紫外光电探测器的潜在理想材料,但是在实际应用过程中,各种环境气氛可显著影响紫外光探测器件的性能。文中采用化学气相沉积方法制备超薄二维ZnO纳米片,并利用该纳米片制作了紫外光探测器件。将探测器件置于密闭系统中进行测试,排除了不同应用环境对测试结果的影响,同时重点研究了不同极性分子对二维超薄ZnO纳米片紫外探测器性能的影响。研究结果表明,在极性分子存在的条件下,ZnO纳米紫外光探测器的暗电流降低1.5~2倍,灵敏性和响应率提高了约1.5倍。

Effect of Atmosphere on the Performance of Ultraviolet Detector Based on Ultrathin ZnO Nanosheets

The unique nanostructures of two dimensional wide band gap semiconductor materials make it an ideal material for high performance UV- detectors. However, in the practical application process,various environment atmospheres can significantly affect the performance of UV detectors. In this paper, researchers used chemical vapor deposition method to prepare ultra-thin two-dimensional ZnO nanosheets which were further utilized to fabricate UV detection devices.Placed the detection device in a closed system for testing to exclude the impact of different application environments on the test results. At the same time, the influence of different polar molecules on the properties of two-dimensional ultrathin ZnO nanosheet UV detector wereemphatically studied.The results showed that in the presence of polar molecules, the dark current of ZnO nanoviolet photodetector was reduced by 1.5~2 times while the sensitivity and response rate were increased by about 1.5 times.