A high-performance nanobridged MoO3 UV photodetector based on nanojunctions with switching characteristics
A high-performance nanobridged MoO3 UV photodetector based on nanojunctions with switching characteristics
复制标题
基于具有开关特性的纳米结的高性能纳米桥MoO3紫外光电探测器
DOI:
10.1088/1361-6528/28/4/045202
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发表时间:
2017-01
期刊:
影响因子:
3.5
通讯作者:
Yanqin Chen
中科院分区:
文献类型:
--
作者:
Qinghong Zheng;Jin Huang;Haiyang Yang;Yanqin Chen
Ultraviolet photodetectors (UVPDs) were fabricated via the in situ growth of orthorhombic MoO3 nanobelts among interdigital electrodes. Two types of nanojunction, touching and interpenetration, were formed between neighboring nanobelts at different growth conditions. The photoresponse mechanism of the UVPDs greatly depends on the type of nanojunction. Nanojunctions formed with touching nanobelts possess switching characteristics due to the barrier height variation along with the UV illumination. The UVPD with the touching structure exhibits low noise, high UV sensitivity and fast speed, having a dark current of 1.4 nA, an on/off ratio of over 100 and a response time of below 1 s, at an applied voltage of 10 V. The enhanced performance can be attributed to the switching characteristics of the touching nanojunction.
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