White-light photosensors based on Ag nanoparticle-reduced graphene oxide hybrid materials

Wei Chen Tu*, Xiang Sheng Liu, Shih Lun Chen, Ming Yi Lin, Wu Yih Uen, Yu Cheng Chen, Yu Chiang Chao

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

5 引文 斯高帕斯(Scopus)

摘要

The unique and outstanding electrical and optical properties of graphene make it a potential material to be used in the construction of high-performance photosensors. However, the fabrication process of a graphene photosensor is usually complicated and the size of the device also is restricted to micrometer scale. In this work, we report large-area photosensors based on reduced graphene oxide (rGO) implemented with Ag nanoparticles (AgNPs) via a simple and cost-effective method. To further optimize the performance of photosensors, the absorbance and distribution of the electrical field intensity of graphene with AgNPs was simulated using the finite-difference time-domain (FDTD) method through use of the surface plasmon resonance effect. Based on the simulated results, we constructed photosensors using rGO with 60-80 nm AgNPs and analyzed the characteristics at room temperature under white-light illumination for outdoor environment applications. The on/off ratio of the photosensor with AgNPs was improved from 1.166 to 9.699 at the bias voltage of -1.5 V, which was compared as a sample without AgNPs. The proposed photosensor affords a new strategy to construct cost-effective and large-area graphene films which raises opportunities in the field of next-generation optoelectronic devices operated in an outdoor environment.

原文英語
文章編號655
期刊Micromachines
9
發行號12
DOIs
出版狀態已發佈 - 2018 十二月 11

ASJC Scopus subject areas

  • 控制與系統工程
  • 機械工業
  • 電氣與電子工程

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