A highly sensitive ultraviolet sensor based on a facile in situ solution-grown ZnO nanorod/graphene heterostructure.
The weak photon absorption and fast carrier kinetics of graphene limit its application in photodetection. This limitation can be overcome by introducing photosensitive nanostructures to graphene. Herein we report the synthesis of a ZnO nanorod/graphene heterostructure by a facile in situ solution growth method. By combining the attributes of photosensitive ZnO nanorods and highly conductive graphene, we for the first time demonstrate a highly sensitive visible-blind ultraviolet (UV) sensor based on graphene related heterostructure. The photoresponsibility of the UV sensor can reach 22.7 A W(-1), which is over 45,000 fold higher than that of single graphene sheet based photodetectors.
Chang
Haixin
H
Nanotechnology Center, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR.
Sun
Zhenhua
Z
Ho
Keith Yat-Fung
KY
Tao
Xiaoming
X
Yan
Feng
F
Kwok
Wai-Ming
WM
Zheng
Zijian
Z
D006108:Graphite / Q000737:chemistry*; D043942:Nanotubes / Q000737:chemistry*; D045663:Quantum Dots; D013050:Spectrometry, Fluorescence; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry*
D006108:Graphite; D015034:Zinc Oxide