Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5492065 | Physica B: Condensed Matter | 2017 | 17 Pages |
Abstract
A broadband photodetector based on Au nanoparticle/double-walled carbon nanotube film/TiO2 nanotube array /Ti multilayer heterojunction structures has been fabricated. A pre-electroforming process at a voltage bias of 35 V was used to switch the photodetector from a high resistance state to a low resistance state. At a voltage bias of 1 V under 532-nm laser illumination in air, the photoresponsivity of the device reached 15.41 mA Wâ1, which is enhanced by approximately 1.91 times when compared with that of device before deposition of Au nanoparticles. In addition, in a vacuum under a voltage bias of 1 V, the photoresponsivity of the device reached 23.29 mA Wâ1 and 6.85 mA Wâ1 at 532 nm and 1064 nm, respectively. The surface plasmon polaritons of the Au nanoparticles allowed extension of the sensitivity of the photosensitive regions into the mid-infrared range. The experimental results show that the device photoresponsivity reached 2.26 mA Wâ1 at a voltage bias of 1 V under 10.6-µm laser illumination in air.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Yan Chen, Guowei Zhang, Zhanmin Dong, Jinquan Wei, Jia-Lin Zhu, Jia-Lin Sun,