High-power pseudomorphic mid-ultraviolet light-emitting diodes with improved efficiency and lifetime

Craig G. Moe; James R. Grandusky; Jianfeng Chen; Ken Kitamura; Mark C. Mendrick; Muhammad Jamil; Masato Toita; Shawn R. Gibb; Leo J. Schowalter

doi:10.1117/12.2037856

8 March 2014 High-power pseudomorphic mid-ultraviolet light-emitting diodes with improved efficiency and lifetime

Craig G. Moe, James R. Grandusky, Jianfeng Chen, Ken Kitamura, Mark C. Mendrick, Muhammad Jamil, Masato Toita, Shawn R. Gibb, Leo J. Schowalter

Author Affiliations +

Proceedings Volume 8986, Gallium Nitride Materials and Devices IX; 89861V (2014) https://doi.org/10.1117/12.2037856
Event: SPIE OPTO, 2014, San Francisco, California, United States

Abstract

Recent advances in mid-ultraviolet light-emitting diodes grown pseudomorphically on bulk AlN substrates have led to improved efficiencies and lifetimes. For a 266 nm device an output power of 66 mW at 300 mA has been achieved with an external quantum efficiency of 4.5%. More importantly, the lifetimes of these devices have been increased substantially. Testing of LEDs in both surface mount design (SMD) and TO-39 packages show L₅₀ lifetimes well in excess of 1,000 hours under a variety of case temperatures and currents. Package-related catastrophic failures are eliminated through encapsulation and hermetic sealing, further reducing failure rates and extending the lifetime.

Citation Download Citation

Craig G. Moe, James R. Grandusky, Jianfeng Chen, Ken Kitamura, Mark C. Mendrick, Muhammad Jamil, Masato Toita, Shawn R. Gibb, and Leo J. Schowalter "High-power pseudomorphic mid-ultraviolet light-emitting diodes with improved efficiency and lifetime", Proc. SPIE 8986, Gallium Nitride Materials and Devices IX, 89861V (8 March 2014); https://doi.org/10.1117/12.2037856

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