High efficiency GaN-based near UV light emitting diodes with asymmetric triangular multiple quantum wells

Heng Li; Chia-Jui Chang; Shiou-Yi Kuo; Jun-Rong Chen; Tien-Chang Lu

doi:10.1117/12.2289389

14 February 2018 High efficiency GaN-based near UV light emitting diodes with asymmetric triangular multiple quantum wells

Heng Li, Chia-Jui Chang, Shiou-Yi Kuo, Jun-Rong Chen, Tien-Chang Lu

Author Affiliations +

Proceedings Volume 10554, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXII; 105540J (2018) https://doi.org/10.1117/12.2289389
Event: SPIE OPTO, 2018, San Francisco, California, United States

Abstract

Near-ultraviolet (NUV) light-emitting diodes (LEDs) have found many applications in the areas such as UV curing, bio-chemical sensors etc. However, the internal quantum efficiency (IQE) of NUV-LEDs show relatively lower value than blue LEDs. In previous research, asymmetric triangular MQWs with gallium face-oriented inclination in the blue wavelength band are demonstrated to have higher emission efficiency and lower efficiency droop. In this study, we surprisingly found different trend in NUV-LEDs. Compared to blue LEDs, NUV-LEDs tend to have shallower quantum wells and less ability to localize holes. In the simulation results, holes are more confined within nitrogen face-oriented inclination than that in MQWs with gallium face-oriented inclination and the IQE are improved about 10%.

Citation Download Citation

Heng Li, Chia-Jui Chang, Shiou-Yi Kuo, Jun-Rong Chen, and Tien-Chang Lu "High efficiency GaN-based near UV light emitting diodes with asymmetric triangular multiple quantum wells", Proc. SPIE 10554, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXII, 105540J (14 February 2018); https://doi.org/10.1117/12.2289389

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