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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 15 — Jul. 29, 2013
  • pp: 18387–18397

Steady-state characteristics and transient response of MgZnO-based metal-semiconductor-metal solar-blind ultraviolet photodetector with three types of electrode structures

Ping Wang, Qinghong Zhen, Qing Tang, Yintang Yang, Lixin Guo, Kai Ding, and Feng Huang  »View Author Affiliations

Optics Express, Vol. 21, Issue 15, pp. 18387-18397 (2013)

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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.

© 2013 Optical Society of America

OCIS Codes
(160.6000) Materials : Semiconductor materials
(230.0250) Optical devices : Optoelectronics

ToC Category:

Original Manuscript: April 3, 2013
Revised Manuscript: June 28, 2013
Manuscript Accepted: July 19, 2013
Published: July 24, 2013

Ping Wang, Qinghong Zhen, Qing Tang, Yintang Yang, Lixin Guo, Kai Ding, and Feng Huang, "Steady-state characteristics and transient response of MgZnO-based metal-semiconductor-metal solar-blind ultraviolet photodetector with three types of electrode structures," Opt. Express 21, 18387-18397 (2013)

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