NDLI: Determination of trap energy levels in AlGaN/GaN HEMT

Content Provider	IEEE Xplore Digital Library
Author	Jie Yang Cui, S. Ma, T.P. Ting-Hsiang Hung Nath, D. Krishnamoorthy, S. Rajan, S.
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Ohio State Univ., Columbus, OH, USA (Ting-Hsiang Hung; Nath, D.; Krishnamoorthy, S.; Rajan, S.) \|\| Dept. of Electr. Eng., Yale Univ., New Haven, CT, USA (Jie Yang; Cui, S.; Ma, T.P.)
Abstract	The density of two dimensional electron gas (2DEG) in the channel of AlGaN/GaN HEMT is often altered by trapped charges on the surface or in the bulk of the heterostructure, limiting the device performance at high frequencies. The existing methods, such as photoionization spectroscopy, Deep Level Transient Spectroscopy (DLTS) etc., mainly focus on deep level traps in GaN, providing little information about traps in the AlGaN layer. In this work, we use Inelastic Electron Tunneling Spectroscopy (IETS), in conjunction with the Frenkel-Poole (F-P) trap energy extraction method developed by Yeh at el, to examine electrically active traps in the AlGaN barrier layer. The results indicate that traps exist in the AlGaN bulk, as well as at the AlGaN/GaN interface. The trap energy levels are within a 0.5eV band below the conduction band edge $(E_{c})$ of AlGaN in the sample that we studied.
Starting Page	79
Ending Page	80
File Size	1063321
Page Count	2
File Format	PDF
ISBN	9781479908110
ISSN	15483770
e-ISBN	9781479908141
DOI	10.1109/DRC.2013.6633802
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Aluminum gallium nitride Electron traps HEMTs Gallium nitride Logic gates Energy states MODFETs
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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