Numerical analysis of using superlattice-AlGaN/InGaN as electron blocking layer in green InGaN light-emitting diodes

Fang-Ming Chen; Bo-Ting Liou; Yi-An Chang; Jih-Yuan Chang; Yih-Ting Kuo; Yen-Kuang Kuo

doi:10.1117/12.2003681

4 March 2013 Numerical analysis of using superlattice-AlGaN/InGaN as electron blocking layer in green InGaN light-emitting diodes

Fang-Ming Chen, Bo-Ting Liou, Yi-An Chang, Jih-Yuan Chang, Yih-Ting Kuo, Yen-Kuang Kuo

Author Affiliations +

Proceedings Volume 8625, Gallium Nitride Materials and Devices VIII; 862526 (2013) https://doi.org/10.1117/12.2003681
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

In this study, a specific design on the electron blocking layer (EBL) by band engineering is investigated numerically with an aim to improve the output performance and to reduce the efficiency droop in green LEDs. Systematic analyses including the energy band diagrams, carrier distributions in the active region, and electron leakage current are given and the simulation results show that the proposed lattice-compensated superlattice-AlGaN/InGaN EBL can provide better optical and electrical output performances when compared to the conventional rectangular AlGaN EBL. The output power of the green LED can be enhanced by a factor of 52% and the applied voltage can be reduced from 5.08 V to 4.53 V at an injection current of 1500 mA. The internal quantum efficiency is improved and the percentage of the efficiency droop can also be reduced from 58% to 37%, which is mainly attributed to the successful suppression of electron leakage current and improvement in hole injection efficiency.

Citation Download Citation

Fang-Ming Chen, Bo-Ting Liou, Yi-An Chang, Jih-Yuan Chang, Yih-Ting Kuo, and Yen-Kuang Kuo "Numerical analysis of using superlattice-AlGaN/InGaN as electron blocking layer in green InGaN light-emitting diodes", Proc. SPIE 8625, Gallium Nitride Materials and Devices VIII, 862526 (4 March 2013); https://doi.org/10.1117/12.2003681

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