Wang Ping, Zhen Qinghong, Tang Qing, Yang Yintang, Guo Lixin, Ding Kai, Huang Feng
State Key Laboratory of Integrated Service Networks, School of Telecommunications Engineering, Xidian University, Xi’an 710071, China.
Opt Express. 2013 Jul 29;21(15):18387-97. doi: 10.1364/OE.21.018387.
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.
对具有不同电极结构的基于MgZnO的金属-半导体-金属（MSM）日盲紫外光电探测器进行了详细研究。基于泊松方程和含时连续性方程建立了二维物理模型，该模型通过我们传统电极MSM探测器的实验数据得到了验证。利用该模型还研究了半圆形和三角形电极MSM探测器的稳态特性和瞬态响应。与传统电极相比，半圆形和三角形电极器件的光电流有显著提高。在10 V偏压下，半圆形和三角形电极器件的稳态饱和光电流分别为14.69 nA和24.37 nA，比传统电极探测器分别增加了20.5%和100%。同时，瞬态峰值光电流分别达到31.38 nA和52.09 nA，均明显大于传统器件。
