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.
Nanotechnology Center, Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR.
Haixin
H
Chang
Zhenhua
Z
Sun
Keith Yat-Fung
KY
Ho
Xiaoming
X
Tao
Feng
F
Yan
Wai-Ming
WM
Kwok
Zijian
Z
Zheng
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