Open AccessApplication of Ni-doped ZnO nanorods in surface acoustic wave ultraviolet photodetectors
Author(s) -
Willem van de Water,
Cheng-Je Li,
LiangWen Ji
Publication year - 2021
Publication title -
modern physics letters b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.293
H-Index - 44
eISSN - 1793-6640
pISSN - 0217-9849
DOI - 10.1142/s0217984921410207
Subject(s) - nanorod , materials science , ultraviolet , scanning electron microscope , photoluminescence , thin film , photodetector , optoelectronics , doping , surface acoustic wave , sputter deposition , sputtering , nanotechnology , optics , composite material , physics
A surface acoustic wave ultraviolet photodetector was fabricated on a ZnO thin film with pure and Ni-doped ZnO nanorods deposited on a Si substrate. Piezoelectric ZnO thin films were grown on Si through radio-frequency magnetron sputtering, and ZnO nanorods were synthesized on ZnO thin films by using the hydrothermal method. The crystalline structure, surface morphology, and luminescent characteristics of ZnO films and nanorods were examined using X-ray diffraction and photoluminescence spectrometers and scanning electron microscope. The performance of the surface acoustic wave photodetector was evaluated using the variations in surface capacitance, insertion loss, and phase shift. ZnO nanorods became shorter and thicker with an increase in the concentration of Ni doping; however, the variations in surface capacitance of Ni-doped ZnO nanorods were greater than those of pure ZnO nanorods obtained under ultraviolet irradiation. Devices with Ni-doped ZnO nanorods exhibited larger shifts in insertion loss and phase than those with pure ZnO nanorods did.