Relevance of the GaN yellow luminescence for light-emitting diodes

W. Grieshaber; E. Fred Schubert; Robert F. Karlicek Jr.; Matthew J. Schurman; Chuong A. Tran

doi:10.1117/12.271049

4 April 1997 Relevance of the GaN yellow luminescence for light-emitting diodes

W. Grieshaber, E. Fred Schubert, Robert F. Karlicek Jr., Matthew J. Schurman, Chuong A. Tran

Proceedings Volume 3002, Light-Emitting Diodes: Research, Manufacturing, and Applications; (1997) https://doi.org/10.1117/12.271049
Event: Photonics West '97, 1997, San Jose, CA, United States

Abstract

The competition between bandgap and the 2.2 eV yellow luminescence of epitaxial GaN is studied for excitation densities ranging from 5 X 10^-6 W/cm^-2 to 50 W/cm^-2. The ratio of the peak intensities of the bandgap-to-yellow luminescence changes from 4 to 1 to 3000 to 1 as the excitation density is increased by seven orders of magnitude. At room temperature, the bandgap luminescence linewidth is 2.3kT, close to the theoretical minimum of 1.8kT. A model is developed describing the intensity of the two radiative transitions as a function of the excitation density. The theoretically predicted dependences of the two different luminescence channels follow power laws with exponents of 1/2, 1 and 3/2. The theoretical dependences are in excellent agreement with experimental results. It is shown that the intensity of the yellow luminescence line is negligibly small at typical injection currents of light- emitting diodes.

Citation Download Citation

W. Grieshaber, E. Fred Schubert, Robert F. Karlicek Jr., Matthew J. Schurman, and Chuong A. Tran "Relevance of the GaN yellow luminescence for light-emitting diodes", Proc. SPIE 3002, Light-Emitting Diodes: Research, Manufacturing, and Applications, (4 April 1997); https://doi.org/10.1117/12.271049

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available