photoconductive detector
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2022 ◽  
Vol 137 ◽  
pp. 106234
Author(s):  
Chengjie Feng ◽  
Jiahua Min ◽  
Xiaoyan Liang ◽  
Jijun Zhang ◽  
Linjun Wang ◽  
...  

Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 10
Author(s):  
Marilou Cadatal-Raduban ◽  
Tomoki Kato ◽  
Yusuke Horiuchi ◽  
Jiří Olejníček ◽  
Michal Kohout ◽  
...  

Vacuum ultraviolet radiation (VUV, from 100 nm to 200 nm wavelength) is indispensable in many applications, but its detection is still challenging. We report the development of a VUV photoconductive detector, based on titanium dioxide (TiO2) nanoparticle thin films. The effect of crystallinity, optical quality, and crystallite size due to film thickness (80 nm, 500 nm, 1000 nm) and type of substrate (silicon Si, quartz SiO2, soda lime glass SLG) was investigated to explore ways of enhancing the photoconductivity of the detector. The TiO2 film deposited on SiO2 substrate with a film thickness of 80 nm exhibited the best photoconductivity, with a photocurrent of 5.35 milli-Amperes and a photosensitivity of 99.99% for a bias voltage of 70 V. The wavelength response of the detector can be adjusted by changing the thickness of the film as the cut-off shifts to a longer wavelength, as the film becomes thicker. The response time of the TiO2 detector is about 5.8 μs and is comparable to the 5.4 μs response time of a diamond UV sensor. The development of the TiO2 nanoparticle thin film detector is expected to contribute to the enhancement of the use of VUV radiation in an increasing number of important technological and scientific applications.


Author(s):  
Yu-Song Zhi ◽  
Zeng Liu ◽  
Shao-Hui Zhang ◽  
Shan Li ◽  
Zu-Yong Yan ◽  
...  

2020 ◽  
Vol 41 (9) ◽  
pp. 1316-1319
Author(s):  
Yuqiang Li ◽  
Wenbin Zhong ◽  
Wei Zheng ◽  
Feng Huang

2020 ◽  
Vol 66 (4 Jul-Aug) ◽  
pp. 490
Author(s):  
Wenhao Ding ◽  
Xianquan Meng

Serrated GaN nanowires were synthesized on sapphire substrate by chemical vapor deposition. Copper nanowires were synthesized by liquid-phase reduction method. The surface morphology of GaN and copper nanowires was observed by scanning electron microscopy. An UV detector based on GaN nanowires was prepared with copper nanowires as electrode. The results show that the device is a photoconductive detector. The detector has different response under different wavelength light illumination and has the maximum response under 365nm ultraviolet light. Photocurrent–time characteristics show the detector has good stability over time.


2020 ◽  
Vol 69 (24) ◽  
pp. 248502-248502
Author(s):  
Li Dan-Yang ◽  
◽  
Han Xu ◽  
Xu Guang-Yuan ◽  
Liu Xiao ◽  
...  

2020 ◽  
Vol 47 (11) ◽  
pp. 1113002
Author(s):  
唐恝 Tang Jia ◽  
李家祥 Li Jiaxiang ◽  
陈沁 Chen Qin ◽  
文龙 Wen Long

2019 ◽  
Vol 115 (17) ◽  
pp. 171101 ◽  
Author(s):  
Edmund Harbord ◽  
Ben Cemlyn ◽  
Matthew Parker ◽  
Edmund Clarke ◽  
Kenneth Kennedy ◽  
...  

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