Color control in monolithic white light emitting diodes using a (Ga,In)N/GaN multiple quantum well light converter

✍ Scribed by Damilano, B. ;Trad, N. ;Brault, J. ;Demolon, P. ;Natali, F. ;Massies, J.

• Book ID: 105366466
• Publisher: John Wiley and Sons
• Year: 2012
• Tongue: English
• Weight: 311 KB
• Volume: 209
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.201100494

✦ Synopsis

Abstract

This work reports the electroluminescence (EL) properties of monolithic light emitting diodes (LEDs) with an integrated (Ga,In)N/GaN light converter. The samples are constituted by a blue LED optically pumping a green–yellow emitting light converter. A simple model is proposed that accounts for the observed EL intensity ratio between the pump and the converter. The internal quantum efficiency (IQE) of the light converter has a crucial effect on the LED color. Experimental results regarding monolithic LEDs with a pump wavelength of 420 nm and a variable converter wavelength are analyzed. Depending on the light converter IQE the LED color can be tuned from blue to white.