Steady-state characteristics and transient response of MgZnO-based metal-semiconductor-metal solar-blind ultraviolet photodetector with three types of electrode structures.
Detailed studies of MgZnO-based metal-semiconductor-metal (MSM) solar-blind ultraviolet photodetector with different electrode structures are performed. A two-dimensional physical model is established based on the Poisson's equation and time-dependent continuity equations, which is verified by our experimental data of conventional electrode MSM detector. The steady-state characteristics and transient response of semicircular and triangular electrode MSM detectors are also investigated by this model. Compared with the conventional electrode, semicircular and triangular electrode devices exhibit a substantial improvement on the photocurrent. At a bias of 10 V, the steady-state saturated photocurrents for semicircular and triangular electrode devices are 14.69 nA and 24.37 nA respectively, corresponding to a 20.5% and 100% increase over the conventional electrode detector. Meanwhile, the transient peak photocurrents reach 31.38 nA and 52.09 nA respectively, both of which are notably larger than that of conventional device.
State Key Laboratory of Integrated Service Networks, School of Telecommunications Engineering, Xidian University, Xi’an 710071, China. pingwang@xidian.edu.cn
Ping
P
Wang
Qinghong
Q
Zhen
Qing
Q
Tang
Yintang
Y
Yang
Lixin
L
Guo
Kai
K
Ding
Feng
F
Huang
D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008277:Magnesium Oxide / Q000737:chemistry* / Q000528:radiation effects; D010783:Photometry / Q000295:instrumentation*; D012666:Semiconductors; D012993:Solar Energy; D015034:Zinc Oxide / Q000737:chemistry*
D008277:Magnesium Oxide; D015034:Zinc Oxide