Inhomogeneous spectral broadening in deep ultraviolet light emitting diodes
Roemer F, Witzigmann B, Guttmann M, Susilo N, Wernicke T, Kneissl M (2019)
Publication Type: Conference contribution
Publication year: 2019
Journal
Publisher: SPIE
Book Volume: 10912
Conference Proceedings Title: Proceedings of SPIE - The International Society for Optical Engineering
Event location: San Francisco, CA
ISBN: 9781510624665
DOI: 10.1117/12.2512182
Abstract
We investigate the spectral broadening in deep ultraviolet (UV) multi quantum well light emitting diodes (LED) by modeling the emission spectra. Experimental emission spectra of deep UV LEDs exhibit a at tail towards lower energies and a steep decrease towards high energies that cannot be explained by convolution of the spectrum with a broadening function. We devise a luminescence model based on the broadening of the density of states (DOS) function which is consistent with the experimental spectra. The broadening of the DOS also explains the emission red shift with respect to the quantum well subband transitions. In addition, we investigate the in uence of the DOS broadening on the carrier and luminescence in the active region.
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Germany (DE)How to cite
APA:
Roemer, F., Witzigmann, B., Guttmann, M., Susilo, N., Wernicke, T., & Kneissl, M. (2019). Inhomogeneous spectral broadening in deep ultraviolet light emitting diodes. In Marek Osinski, Yasuhiko Arakawa, Bernd Witzigmann (Eds.), Proceedings of SPIE - The International Society for Optical Engineering. San Francisco, CA, US: SPIE.
MLA:
Roemer, Friedhard, et al. "Inhomogeneous spectral broadening in deep ultraviolet light emitting diodes." Proceedings of the Physics and Simulation of Optoelectronic Devices XXVII 2019, San Francisco, CA Ed. Marek Osinski, Yasuhiko Arakawa, Bernd Witzigmann, SPIE, 2019.
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