High-power phosphor-free InGaN/AlGaN dot-in-a-wire core-shell white light-emitting diodes

Hieu P. T. Nguyen; Mehrdad Djavid; Steffi Y. Woo; Xianhe Liu; Qi Wang; Gianluigi A. Botton; Zetian Mi

doi:10.1117/12.2084777

9 March 2015 High-power phosphor-free InGaN/AlGaN dot-in-a-wire core-shell white light-emitting diodes

Hieu P. T. Nguyen, Mehrdad Djavid, Steffi Y. Woo, Xianhe Liu, Qi Wang, Gianluigi A. Botton, Zetian Mi

Proceedings Volume 9383, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIX; 938307 (2015) https://doi.org/10.1117/12.2084777
Event: SPIE OPTO, 2015, San Francisco, California, United States

Abstract

We report on the achievement of relatively high power phosphor-free white light-emitting diodes (LEDs) using a new self-organized InGaN/AlGaN dot-in-a-wire core-shell nanowire heterostructure. Multiple AlGaN shell layers are spontaneously formed during the growth of the quantum dot active region. Due to the drastically reduced nonradiative surface recombination, such core-shell nanowire structures exhibit significantly increased carrier lifetime (from ~ 0.3ns to ~ 4.5ns) and massively enhanced photoluminescence intensity. Strong white-light emission was recorded for the unpackaged core-shell nanowire LEDs with an output power of >5 mW, measured under an injection current ~ 60A/cm², with a color rendering index of ~ 95.

Citation Download Citation

Hieu P. T. Nguyen, Mehrdad Djavid, Steffi Y. Woo, Xianhe Liu, Qi Wang, Gianluigi A. Botton, and Zetian Mi "High-power phosphor-free InGaN/AlGaN dot-in-a-wire core-shell white light-emitting diodes", Proc. SPIE 9383, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIX, 938307 (9 March 2015); https://doi.org/10.1117/12.2084777

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