Performance Enhancement of ZnO UV Photodetectors by Surface Plasmons

Surface plasmons, a unique property of metal nanoparticles, have been widely applied to enhance the performance of optical and electrical devices. In this study, a high quality zinc oxide (ZnO) thin film was grown on a quartz substrate by a radio frequency magnetron sputtering technique, and a metal...

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Published inACS applied materials & interfaces Vol. 6; no. 3; pp. 2162 - 2166
Main Authors Tian, Chunguang, Jiang, Dayong, Li, Baozeng, Lin, Jingquan, Zhao, Yajun, Yuan, Wenxiang, Zhao, Jianxun, Liang, Qingcheng, Gao, Shang, Hou, Jianhua, Qin, Jieming
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 12.02.2014
Subjects
ZnO film
magnetron sputtering
surface plasmons
Pt nanoparticle
responsivity
MSM photodetector
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Summary:Surface plasmons, a unique property of metal nanoparticles, have been widely applied to enhance the performance of optical and electrical devices. In this study, a high quality zinc oxide (ZnO) thin film was grown on a quartz substrate by a radio frequency magnetron sputtering technique, and a metal–semiconductor–metal structured ultraviolet detector was prepared on the ZnO film. The responsivity of the photodetector was enhanced from 0.836 to 1.306 A/W by sputtering metal (Pt) nanoparticles on the surface of the device. In addition, the absorption of the ZnO thin film was enhanced partly in the ultraviolet band. It is revealed that Pt nanoparticles play a key role in enhancing the performance of the photodetectors, where surface plasma resonance occurs.
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ISSN:1944-8244
1944-8252
DOI:10.1021/am405292p