Possible ohmic mechanisms of Ag/indium tin oxide p-type contacts for high-brightness GaN -Based light emitting diodes

June O. Song; Hyun Gi Hong; Joon Woo Jeon; Jung Inn Sohn; Ja Soon Jang; Tae Yeon Seong

doi:10.1149/1.2819536

Possible ohmic mechanisms of Ag/indium tin oxide p-type contacts for high-brightness GaN -Based light emitting diodes

June O. Song, Hyun Gi Hong, Joon Woo Jeon, Jung Inn Sohn, Ja Soon Jang, Tae Yeon Seong

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

We have investigated the Ag (1 nm)indium tin oxide (ITO) (200 nm) contacts by scanning transmission electron microscopy (STEM), Auger electron spectroscopy (AES), and X-ray photoemission spectroscopy (XPS) to understand its ohmic mechanism. The Ag/ITO contacts exhibit ohmic behaviors, when annealed at 400-600°C. The effective Schottky barrier heights depend on the annealing temperatures. STEM and AES results reveal the formation of Ag nanodots (5-35 nm across) and Ga-Ag solid solution. Based on the STEM, AES, and XPS results, the ohmic contact formation is described in terms of the formation of the Ga-Ag solid solution and the inhomogeneous interfaces with nanodots.

Original language	English
Pages (from-to)	H36-H38
Journal	Electrochemical and Solid-State Letters
Volume	11
Issue number	2
DOIs	https://doi.org/10.1149/1.2819536
Publication status	Published - 2008

ASJC Scopus subject areas

Chemical Engineering(all)
Materials Science(all)
Physical and Theoretical Chemistry
Electrochemistry
Electrical and Electronic Engineering

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@article{8ad5ebdf04664bedb52594eba21972b8,

title = "Possible ohmic mechanisms of Ag/indium tin oxide p-type contacts for high-brightness GaN -Based light emitting diodes",

abstract = "We have investigated the Ag (1 nm)indium tin oxide (ITO) (200 nm) contacts by scanning transmission electron microscopy (STEM), Auger electron spectroscopy (AES), and X-ray photoemission spectroscopy (XPS) to understand its ohmic mechanism. The Ag/ITO contacts exhibit ohmic behaviors, when annealed at 400-600°C. The effective Schottky barrier heights depend on the annealing temperatures. STEM and AES results reveal the formation of Ag nanodots (5-35 nm across) and Ga-Ag solid solution. Based on the STEM, AES, and XPS results, the ohmic contact formation is described in terms of the formation of the Ga-Ag solid solution and the inhomogeneous interfaces with nanodots.",

author = "Song, {June O.} and Hong, {Hyun Gi} and Jeon, {Joon Woo} and Sohn, {Jung Inn} and Jang, {Ja Soon} and Seong, {Tae Yeon}",

note = "Funding Information: We sincerely thank Professor Po Teen Lim and the two anonymous reviewers for their very useful and insightful comments. This study was largely supported by the National Key R&D Program of China (No. 2018YFD0901500 ; 2018YFE0103700 ), the National Natural Science Foundation (Nos. 41876124 ; 61871293 ; 41706147 ; 31570364 ), Key Fishery and Agricultural Science and Technology project in Dongtou District of Wenzhou ( N2018Y03A ), Wenzhou Water Pollution Control and Treatment Technology Innovation Project ( S20160003 ) and Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography (No. LMEB201706 ). ",

year = "2008",

doi = "10.1149/1.2819536",

language = "English",

volume = "11",

pages = "H36--H38",

journal = "Electrochemical and Solid-State Letters",

issn = "1099-0062",

publisher = "Electrochemical Society, Inc.",

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TY - JOUR

T1 - Possible ohmic mechanisms of Ag/indium tin oxide p-type contacts for high-brightness GaN -Based light emitting diodes

AU - Song, June O.

AU - Hong, Hyun Gi

AU - Jeon, Joon Woo

AU - Sohn, Jung Inn

AU - Jang, Ja Soon

AU - Seong, Tae Yeon

N1 - Funding Information: We sincerely thank Professor Po Teen Lim and the two anonymous reviewers for their very useful and insightful comments. This study was largely supported by the National Key R&D Program of China (No. 2018YFD0901500 ; 2018YFE0103700 ), the National Natural Science Foundation (Nos. 41876124 ; 61871293 ; 41706147 ; 31570364 ), Key Fishery and Agricultural Science and Technology project in Dongtou District of Wenzhou ( N2018Y03A ), Wenzhou Water Pollution Control and Treatment Technology Innovation Project ( S20160003 ) and Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography (No. LMEB201706 ).

PY - 2008

Y1 - 2008

N2 - We have investigated the Ag (1 nm)indium tin oxide (ITO) (200 nm) contacts by scanning transmission electron microscopy (STEM), Auger electron spectroscopy (AES), and X-ray photoemission spectroscopy (XPS) to understand its ohmic mechanism. The Ag/ITO contacts exhibit ohmic behaviors, when annealed at 400-600°C. The effective Schottky barrier heights depend on the annealing temperatures. STEM and AES results reveal the formation of Ag nanodots (5-35 nm across) and Ga-Ag solid solution. Based on the STEM, AES, and XPS results, the ohmic contact formation is described in terms of the formation of the Ga-Ag solid solution and the inhomogeneous interfaces with nanodots.

AB - We have investigated the Ag (1 nm)indium tin oxide (ITO) (200 nm) contacts by scanning transmission electron microscopy (STEM), Auger electron spectroscopy (AES), and X-ray photoemission spectroscopy (XPS) to understand its ohmic mechanism. The Ag/ITO contacts exhibit ohmic behaviors, when annealed at 400-600°C. The effective Schottky barrier heights depend on the annealing temperatures. STEM and AES results reveal the formation of Ag nanodots (5-35 nm across) and Ga-Ag solid solution. Based on the STEM, AES, and XPS results, the ohmic contact formation is described in terms of the formation of the Ga-Ag solid solution and the inhomogeneous interfaces with nanodots.

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JO - Electrochemical and Solid-State Letters

JF - Electrochemical and Solid-State Letters

IS - 2

ER -

Possible ohmic mechanisms of Ag/indium tin oxide p-type contacts for high-brightness GaN -Based light emitting diodes

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