Optical and electrical noise in RGB LEDs in the mHz to kHz frequency band

Danylo Bohomolov; Vita Ivanova; Ulrich Theodor Schwarz

doi:10.1117/12.3002204

8 March 2024 Optical and electrical noise in RGB LEDs in the mHz to kHz frequency band

Danylo Bohomolov, Vita Ivanova, Ulrich Theodor Schwarz

Author Affiliations +

Proceedings Volume 12886, Gallium Nitride Materials and Devices XIX; 128860E (2024) https://doi.org/10.1117/12.3002204
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Defects in the active region of light-emitting diodes (LEDs) have a strong correlation with low-frequency electrical and, consequently, optical fluctuations of the light source. We investigate these two types of noise in red, blue, and green commercially available LEDs using a superposition model of stationary (thermal and shot noise) and excess noise (flicker and generation-recombination noise). The dependence of the degree of the low-frequency component on the supply current and the LED material was obtained. The occurrence of Lorentzinana-type spectrum at high currents for blue and green LEDs is also observed.

Conference Presentation

Citation Download Citation

Danylo Bohomolov, Vita Ivanova, and Ulrich Theodor Schwarz "Optical and electrical noise in RGB LEDs in the mHz to kHz frequency band", Proc. SPIE 12886, Gallium Nitride Materials and Devices XIX, 128860E (8 March 2024); https://doi.org/10.1117/12.3002204

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