TY - JOUR
T1 - ZnO nanorods array as light absorption antenna for high-gain UV photodetectors
AU - Zheng, Haorong
AU - Jiang, Yurong
AU - Yang, Shengyi
AU - Zhang, Yong
AU - Yan, Xuefeng
AU - Hu, Jinming
AU - Shi, Yuansheng
AU - Zou, Bingsuo
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/1/5
Y1 - 2020/1/5
N2 - Hydrothermal method provides the advantages of simple, low-temperature growth conditions, low cost and large surface areas for the samples. Also, exciton dissociation can be enhanced by surface plasmon resonance (SPR) due to the plasmonic absorption enhancement of incident light. In this paper, high-gain ultraviolet (UV) photodetectors based on vertically aligned ZnO nanorods (ZnO-NRs) array as light absorption antenna were presented, in which ZnO-NRs array was prepared by hydrothermal method. Our experimental data showed that the device performance of the UV photodetector Au/ZnO(ZnO-NRs:Au-NPs)/Au can be further enhanced after the gaps of ZnO-NRs array were filled with Au nanoparticles (Au-NPs). The photo-to-dark current ratio and the specific detectivity of the UV photodetector Au/ZnO(ZnO-NRs:Au-NPs)/Au reached to 1 × 105 and 1.84 × 1013 Jones at 2 V under 100 μW/cm2 365 nm illumination, respectively. The physical mechanism for the enhanced performance of the UV photodetectors is discussed.
AB - Hydrothermal method provides the advantages of simple, low-temperature growth conditions, low cost and large surface areas for the samples. Also, exciton dissociation can be enhanced by surface plasmon resonance (SPR) due to the plasmonic absorption enhancement of incident light. In this paper, high-gain ultraviolet (UV) photodetectors based on vertically aligned ZnO nanorods (ZnO-NRs) array as light absorption antenna were presented, in which ZnO-NRs array was prepared by hydrothermal method. Our experimental data showed that the device performance of the UV photodetector Au/ZnO(ZnO-NRs:Au-NPs)/Au can be further enhanced after the gaps of ZnO-NRs array were filled with Au nanoparticles (Au-NPs). The photo-to-dark current ratio and the specific detectivity of the UV photodetector Au/ZnO(ZnO-NRs:Au-NPs)/Au reached to 1 × 105 and 1.84 × 1013 Jones at 2 V under 100 μW/cm2 365 nm illumination, respectively. The physical mechanism for the enhanced performance of the UV photodetectors is discussed.
KW - Hydrothermal method
KW - Schottky contact
KW - Surface plasmon resonance (SPR)
KW - Ultraviolet (UV) photodetectors
KW - ZnO nanorods (ZnO-NRs) array
UR - http://www.scopus.com/inward/record.url?scp=85071875241&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2019.152158
DO - 10.1016/j.jallcom.2019.152158
M3 - Article
AN - SCOPUS:85071875241
SN - 0925-8388
VL - 812
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 152158
ER -