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Title: Response analysis on AlGaN metal–semiconductor–metal photodetectors in a perspective of experiment and theory and the persistent photoconductivity effect

Abstract

Aluminum gallium nitride (AlGaN) metal–semiconductor–metal photodetectors were successfully fabricated with different contact materials and structures and were tested with ultrafast lasers. The experimental results were compared with the finite element simulations based on APSYS and showed consistent trend in respect to the device I–V properties and response behaviors. Persistent photoconductivity (PPC) was observed for devices with both gold and aluminum contacts and various structures, and the decay time can be longer than 10 ms. The response time and responsivity were found to be affected by the bias voltage, operating temperature, and incident power. The mechanism behind the long decay time is analyzed from the perspective of the materials properties and factors influencing the decay time are examined. The nature of the metal–semiconductor contact is studied to help understand the PPC effect, and the contact showed ohmic-like behavior.

Authors:
ORCiD logo [1];  [1]
  1. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); Univ. of Rochester, NY (United States); New York State Energy Research and Development Authority
OSTI Identifier:
1475016
Report Number(s):
[2017-234; 1-433]
[Journal ID: ISSN 0884-2914; applab; 2017-234, 1433, 2391]
Grant/Contract Number:  
[NA0001944]
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Research
Additional Journal Information:
[ Journal Volume: 33; Journal Issue: 17; Conference: Materials Research Society Fall Meeting , Boston, MA (United States), 26 Nov-1 Dec 2017]; Journal ID: ISSN 0884-2914
Publisher:
Materials Research Society
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Zhao, Yiming, and Donaldson, William R. Response analysis on AlGaN metal–semiconductor–metal photodetectors in a perspective of experiment and theory and the persistent photoconductivity effect. United States: N. p., 2018. Web. doi:10.1557/jmr.2018.297.
Zhao, Yiming, & Donaldson, William R. Response analysis on AlGaN metal–semiconductor–metal photodetectors in a perspective of experiment and theory and the persistent photoconductivity effect. United States. doi:10.1557/jmr.2018.297.
Zhao, Yiming, and Donaldson, William R. Fri . "Response analysis on AlGaN metal–semiconductor–metal photodetectors in a perspective of experiment and theory and the persistent photoconductivity effect". United States. doi:10.1557/jmr.2018.297. https://www.osti.gov/servlets/purl/1475016.
@article{osti_1475016,
title = {Response analysis on AlGaN metal–semiconductor–metal photodetectors in a perspective of experiment and theory and the persistent photoconductivity effect},
author = {Zhao, Yiming and Donaldson, William R.},
abstractNote = {Aluminum gallium nitride (AlGaN) metal–semiconductor–metal photodetectors were successfully fabricated with different contact materials and structures and were tested with ultrafast lasers. The experimental results were compared with the finite element simulations based on APSYS and showed consistent trend in respect to the device I–V properties and response behaviors. Persistent photoconductivity (PPC) was observed for devices with both gold and aluminum contacts and various structures, and the decay time can be longer than 10 ms. The response time and responsivity were found to be affected by the bias voltage, operating temperature, and incident power. The mechanism behind the long decay time is analyzed from the perspective of the materials properties and factors influencing the decay time are examined. The nature of the metal–semiconductor contact is studied to help understand the PPC effect, and the contact showed ohmic-like behavior.},
doi = {10.1557/jmr.2018.297},
journal = {Journal of Materials Research},
number = [17],
volume = [33],
place = {United States},
year = {2018},
month = {8}
}

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