Array of ZnO nanoparticle-sensitized ZnO nanorods for UV photodetection

详细信息    查看全文

• 作者：Zahra Alaie (1)
  Shahram Mohammad Nejad (1)
  Mohammad Hasan Yousefi (2)
  
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2014
• 出版时间：February 2014
• 年：2014
• 卷：25
• 期：2
• 页码：852-856
• 全文大小：486 KB
• 作者单位：Zahra Alaie (1)
  Shahram Mohammad Nejad (1)
  Mohammad Hasan Yousefi (2)
  
  1. Nanoptronics Research Center, Iran University of Science and Technology, Tehran, Iran
  2. Nanolab, Malke Ashtar University of Technology, Esfahan, Iran
  
• ISSN：1573-482X

文摘

Vertically aligned ZnO nanorod (NR) arrays have been successfully synthesized on ITO-glass substrate by hydrothermal growth. Chemical bath deposition method was used to deposit ZnO nanoparticles (NPs) onto the ZnO NRs. These structures were applied in fabricating ZnO NPs sensitized ultraviolet (UV) photodetectors (PDs). Incorporation of ZnO NPs onto ZnO NRs results in distinct improvement of optical properties of ZnO NRs, i.e., significant enhancement of emission as well as effective suppression of defects emission in ZnO. Furthermore, there is a noticeable blue-shift in absorption spectra compared with that of ZnO NRs structure. I–V characteristics show that the sensitized structure improved photocurrent almost twice that of unsensitized ZnO NRs. Consequently, these findings may open new opportunities for the integration of different ZnO nanostructures for application in UV region particularly fabrication of UV PDs.