Hybrid GaN LED with capillary-bonded II–VI MQW color-converting membrane for visible light communications

Santos, J. M. M. et al. (2015) Hybrid GaN LED with capillary-bonded II–VI MQW color-converting membrane for visible light communications. Semiconductor Science and Technology, 30(3), 035012. (doi: 10.1088/0268-1242/30/3/035012)

Abstract

The rapid emergence of gallium-nitride (GaN) light-emitting diodes (LEDs) for solid-state lighting has created a timely opportunity for optical communications using visible light. One important challenge to address this opportunity is to extend the wavelength coverage of GaN LEDs without compromising their modulation properties. Here, a hybrid source for emission at 540 nm consisting of a 450 nm GaN micro-sized LED (micro-LED) with a micron-thick ZnCdSe/ZnCdMgSe multi-quantum-well color-converting membrane is reported. The membrane is liquid-capillary-bonded directly onto the sapphire window of the micro-LED for full hybridization. At an injection current of 100 mA, the color-converted power was found to be 37 μW. At this same current, the −3 dB optical modulation bandwidth of the bare GaN and hybrid micro-LEDs were 79 and 51 MHz, respectively. The intrinsic bandwidth of the color-converting membrane was found to be power-density independent over the range of the micro-LED operation at 145 MHz, which corresponds to a mean carrier lifetime of 1.9 ns.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Watson, Dr Scott and Dawson, Prof Martin and Kelly, Professor Anthony
• Authors: Santos, J. M. M., Jones, B. E., Schlosser, P. J., Watson, S., Herrnsdorf, J., Guilhabert, B., McKendry, J. J. D., De Jesus, J., Garcia, T. A., Tamargo, M. C., Kelly, A. E., Hastie, J. E., Laurand, N., and Dawson, M. D.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Semiconductor Science and Technology
• Publisher: IOP Publishing Ltd.
• ISSN: 0268-1242
• ISSN (Online): 1361-6641