Journal article 1417 views 173 downloads
Role of Self-Heating and Polarization in AlGaN/GaN Based Heterostructures
IEEE Access, Volume: 5, Issue: October, Pages: 20946 - 20952
Swansea University Author:
Karol Kalna
-
PDF | Version of Record
Download (873.32KB)
DOI (Published version): 10.1109/ACCESS.2017.2755984
Abstract
Abstract:The interplay of self-heating and polarization affecting resistance is studied in AlGaN/GaN Transmission Line Model (TLM) heterostructures with a scaled source-to-drain distance. The study is based on meticulously calibrated TCAD simulations against I-V experimental data using an electrothe...
Published in: | IEEE Access |
---|---|
ISSN: | 2169-3536 |
Published: |
New York
IEEE
2017
|
Online Access: |
Check full text
|
URI: | https://cronfa.swan.ac.uk/Record/cronfa36147 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Abstract: |
Abstract:The interplay of self-heating and polarization affecting resistance is studied in AlGaN/GaN Transmission Line Model (TLM) heterostructures with a scaled source-to-drain distance. The study is based on meticulously calibrated TCAD simulations against I-V experimental data using an electrothermal model. The electro-thermal simulations show hot-spots (with peak temperature in a range of ~ 566 K - 373 K) at the edge of the drain contact due to a large electric field. The electrical stress on Ohmic contacts reduces the total polarization, leading to the inverse/converse piezoelectric effect. This inverse effect decreases the polarization by 7 %, 10 %, and 17 % during a scaling of the source-to-drain distance in the 12 μm, 8μm and 4 μm TLM heterostructures, respectively, when compared to the largest 18 μm heterostructure. |
---|---|
Keywords: |
III-V Nitrides, Self-Heating, Polarization, TLM Structures, Electro-Thermal Transport Simulations |
College: |
Faculty of Science and Engineering |
Issue: |
October |
Start Page: |
20946 |
End Page: |
20952 |