3D simulation and analysis of AlGaN/GaN ultraviolet light-emittings diodes

Joachim Piprek; Thomas M. Katona; Steven P. DenBaars; Simon Li

doi:10.1117/12.543266

21 June 2004 3D simulation and analysis of AlGaN/GaN ultraviolet light-emittings diodes

Joachim Piprek, Thomas M. Katona, Steven P. DenBaars, Simon Li

Proceedings Volume 5366, Light-Emitting Diodes: Research, Manufacturing, and Applications VIII; (2004) https://doi.org/10.1117/12.543266
Event: Integrated Optoelectronic Devices 2004, 2004, San Jose, CA, United States

Abstract

Compact ultraviolet light sources are currently of high interest for applications in solid-state lighting, short-range communication, and bio-chemical detection. Our nitride-based light-emitting diode (LED) includes AlGaN quantum wells with an emission wavelength of approximately 340 nm. In this paper, we analyze internal device physics by three-dimensional (3D) numerical simulation. The simulation incorporated a 3D drift-diffusion model for the carrier transport, the quantum well (QW) energy band-structure including interface polarization charges, the local QW spontaneous emission spectrum, as well as 3D raytracing for photon extraction. The simulation results showed good agreement with measurements. Internal physical mechanisms such as current crowding, carrier leakage, and carrier recombination were investigated. Nanoscale effects exhibited a strong influence on the LED performance.

Citation Download Citation

Joachim Piprek, Thomas M. Katona, Steven P. DenBaars, and Simon Li "3D simulation and analysis of AlGaN/GaN ultraviolet light-emittings diodes", Proc. SPIE 5366, Light-Emitting Diodes: Research, Manufacturing, and Applications VIII, (21 June 2004); https://doi.org/10.1117/12.543266

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