Beveled sidewall formation and its effect on the light output of a GaInN multiquantum well light-emitting diode with sapphire substrate

Jung-Tsung Hsu; W. Y. Yeh; ChangCheng Chuo; Jenq-Dar Tsay; C. S. Huang; C. Y. Lin

doi:10.1117/1.2131049

1 November 2005 Beveled sidewall formation and its effect on the light output of a GaInN multiquantum well light-emitting diode with sapphire substrate

Jung-Tsung Hsu, W. Y. Yeh, ChangCheng Chuo, Jenq-Dar Tsay, C. S. Huang, C. Y. Lin

Author Affiliations +

Optical Engineering, Vol. 44, Issue 11, 111304 (November 2005). https://doi.org/10.1117/1.2131049

Abstract

In this research, experiments and optical simulations are carried out to study the effect of beveled sidewalls and geometric shapes on the light extraction efficiency of a GaN light-emitting diode (LED) with sapphire substrate. In addition to the conventional rectangular chips, hexagonal chips are experimentally processed for the first time on a novel island-like GaN substrate, on which the beveled sidewalls are naturally formed at each island during GaN epitaxial growth on a sapphire original substrate by hydride vapor phase epitaxy (HVPE) technology. The results from our simulations and experiments show that the output power of a LED with beveled sidewalls is about two times that of a normal LED, and those from hexagonal chips are always better than those from conventional rectangular chips.

©(2005) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Jung-Tsung Hsu, W. Y. Yeh, ChangCheng Chuo, Jenq-Dar Tsay, C. S. Huang, and C. Y. Lin "Beveled sidewall formation and its effect on the light output of a GaInN multiquantum well light-emitting diode with sapphire substrate," Optical Engineering 44(11), 111304 (1 November 2005). https://doi.org/10.1117/1.2131049

Published: 1 November 2005

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