Photoluminescence mapping as a tool to improve LED production

Zhiqiang Li; Thomas Ryan

doi:10.1117/12.814665

3 February 2009 Photoluminescence mapping as a tool to improve LED production

Zhiqiang Li, Thomas Ryan

Proceedings Volume 7231, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIII; 72310P (2009) https://doi.org/10.1117/12.814665
Event: SPIE OPTO: Integrated Optoelectronic Devices, 2009, San Jose, California, United States

Abstract

Photoluminescence (PL) technique has demonstrated the powerful capability for practical application to wafer inspections in III-V compound semiconductor production. This paper describes the principle and the physics behind the variation of PL wavelength with laser excitation power density. We discuss the effect of GaN cap thickness on the PL measurements. This is especially relevant to LED manufacturers where thick GaN caps are commonly used and to PL metrology of InGaN MQW laser structures. A methodology was proposed to select the most appropriate laser and set of excitation conditions to achieve matching between PL and electroluminescence (EL) wavelengths for common Blue and Green LED structures.

Citation Download Citation

Zhiqiang Li and Thomas Ryan "Photoluminescence mapping as a tool to improve LED production", Proc. SPIE 7231, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIII, 72310P (3 February 2009); https://doi.org/10.1117/12.814665

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