Zero-Bias Visible to Near-Infrared Horizontal p-n-p TiO2 Nanotubes Doped Monolayer Graphene Photodetector

Molecules

Chunhui Ji¹  Ming Yang¹  Luhua Cheng¹  Jiayue Han¹  Zehua Huang¹  Xiongbang Wei¹  Yadong Jiang¹  Jun Wang¹ 

[1] School of Optoelectronic Science and Engineering State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China;

关键词: graphene;    TiO₂ nanotubes;    broadband;    zero-bias;    p-n-p junction;   

DOI  :  10.3390/molecules24101870

来源: DOAJ

【 摘 要 】

We present a p-n-p monolayer graphene photodetector doped with titanium dioxide nanotubes for detecting light from visible to near-infrared (405 to 1310 nm) region. The built-in electric field separates the photo-induced electrons and holes to generate photocurrent without bias voltage, which allows the device to have meager power consumption. Moreover, the detector is very sensitive to the illumination area, and we analyze the reason using the energy band theory. The response time of the detector is about 30 ms. The horizontal p-n-p device is a suitable candidate in zero-bias optoelectronic applications.

【 授权许可】

Unknown