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A Self‐Powered High‐Performance UV Photodetector Based on Core–Shell GaN/MoO3–x Nanorod Array Heterojunction.
- Source :
-
Advanced Optical Materials . 8/5/2020, Vol. 8 Issue 15, p1-9. 9p. - Publication Year :
- 2020
-
Abstract
- Self‐powered UV photodetectors are highly desirable for applications in space communications and environmental monitoring. However, most self‐powered UV photodetectors exhibit unimpressive performance in weak signal detection. Herein, a self‐powered UV photodetector based on the core–shell GaN/MoO3–x nanorod array (NRA) heterojunction system is demonstrated. Homogeneous MoO3–x layers are deposited on GaN NRAs by a simple one‐step physical vapor deposition method. The photodetector device shows an ultrahigh specific detectivity of 2.7 × 1015 Jones at 355 nm without any power supply. Further analyses reveal a responsivity of 160 A W−1 and a high UV–vis rejection ratio (R355 nm/R400 nm) of 2.0 × 104 under zero bias. The self‐powered device also has a fast response speed with a rise/fall time of 73/90 µs. As a result, the self‐powered photodetector, featuring ultrahigh detectivity and responsivity along with fast response, exhibits great potential for applications in next‐generation UV detection. The core–shell NRA structure heterojunction design provides a valuable direction for realizing nanoscale self‐powered UV photodetectors. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21951071
- Volume :
- 8
- Issue :
- 15
- Database :
- Academic Search Index
- Journal :
- Advanced Optical Materials
- Publication Type :
- Academic Journal
- Accession number :
- 144949484
- Full Text :
- https://doi.org/10.1002/adom.202000197