NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Combinatorial Study of Nickel-Gold P-Contacts for Blue Indium Gallium Nitride Light-Emitting Diodes

Published

Author(s)

M T. Ahrens, E B. Stokes, Albert Davydov, Peter K. Schenck, Abhishek Motayed, T R. Harris, S T. Morton

Abstract

Although the efficiency of the Gallium Nitride (GaN) Light Emitting-Diode (LED) has improved in the past decade, a great opportunity for further efficiency improvement lies in the optimization of the Nickel-Gold composition of the p-type GaN metal contacts. The work described here will analyze the properties and performance of LED p-type contacts with varying Nickel-Gold (Ni-Au) compositions. In this work, during the electron-beam deposition of the Ni and Au onto an LED wafer, the relative thicknesses of the two metals were spatially varied to provide a combinatorial array of Ni an Au compositions on a single LED wafer. Each Ni-Au composition on the LED wafer was then analyzed for optical transmittance before and after annealing. LED devices were finally fabricated from the wafer, and the resultant overall power efficiencies of the fabricated LED devices were evaluated as a function of Ni and Au thickness.
Citation
Journal of the Electrochemical Society
Pub Type
Journals

Keywords

combinatorial study, gallium nitride, indium nitride, light emitting diode, nickel-gold contacts
Ceramics and Biomaterials

Citation

Ahrens, M. , Stokes, E. , Davydov, A. , Schenck, P. , Motayed, A. , Harris, T. and Morton, S. (2021), Combinatorial Study of Nickel-Gold P-Contacts for Blue Indium Gallium Nitride Light-Emitting Diodes, Journal of the Electrochemical Society (Accessed October 13, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact [email protected].

Created October 12, 2021
Was this page helpful?