Chlorine-doped n-type CdS nanowires with enhanced photoconductivity
| Autor: | Xiwei Zhang, Jiajun Cai, Huier Guo, Yongqiang Yu, Chunyan Wu, Jiansheng Jie, Yang Jiang, Li Wang, Qiang Peng, Di Wu |
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| Rok vydání: | 2010 |
| Předmět: |
Materials science
Dopant business.industry Mechanical Engineering Photoconductivity Doping Nanowire Bioengineering General Chemistry Conductivity Responsivity Mechanics of Materials Optoelectronics General Materials Science Electrical and Electronic Engineering business Visible spectrum Wurtzite crystal structure |
| Zdroj: | Nanotechnology. 21:505203 |
| ISSN: | 1361-6528 0957-4484 |
| DOI: | 10.1088/0957-4484/21/50/505203 |
| Popis: | Cl-doped n-type CdS NWs with single-crystal wurtzite structure and [Formula: see text] growth direction were synthesized by using CdCl(2) as the dopant via a thermal co-evaporation method. By controlling the Cl vapor pressure during the growth, the conductivity of the CdS:Cl NWs can be tuned in a wide range of five orders of magnitude. A nano-photodetector based on the CdS:Cl NWs shows high sensitivity to visible light with excellent stability and reproducibility. Significantly, the photoconductivity of the CdS NWs is greatly enhanced by Cl doping and the responsivity and photoconductive gain of the CdS:Cl NWs have substantially increased compared with the undoped CdS NWs. Further study also demonstrates the polarization-dependent photoconductivity of the CdS:Cl NWs. It is expected that the CdS:Cl NWs with tunable optoelectronic properties will have important applications in high-performance nano-optoelectronic devices. |
| Databáze: | OpenAIRE |
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