Significant Enhancement of MgZnO Metal-Semiconductor-Metal Photodetectors via Coupling with Pt Nanoparticle Surface Plasmons

• Main Authors: Zexuan Guo, Dayong Jiang, Nan Hu, Xiaojiang Yang, Wei Zhang, Yuhan Duan, Shang Gao, Qingcheng Liang, Tao Zheng, Jingwen Lv
• Format: Article
• Language: English
• Published: SpringerOpen 2018-06-01
• Series: Nanoscale Research Letters
• Subjects: MgZnO film; Ultraviolet photodetector; SPs; Electrode spacing
• Online Access: http://link.springer.com/article/10.1186/s11671-018-2573-7
• ISSN: 1931-7573; 1556-276X

Abstract We proposed and demonstrated MgZnO metal-semiconductor-metal (MSM) ultraviolet photodetectors (UV) assisted with surface plasmons (SPs) prepared by the radio frequency magnetron sputtering deposition method. After the decoration of their surface with Pt nanoparticles (NPs), the responsivity of all the electrode spacing (3, 5, and 8 μm) photodetectors were enhanced dramatically; to our surprise, comparing with them the responsivity of larger spacing sample, more SPs were gathered which are smaller than others in turn. A physical mechanism focused on SPs and depletion width is given to explain the above results.