Electrically controlled RGB color tunability in a single GaN-based LED material through manipulation of Eu3+ emission (Conference Presentation)

Brandon Mitchell; Volkmar Dierolf; Yasufumi Fujiwara

doi:10.1117/12.2542217

9 March 2020 Electrically controlled RGB color tunability in a single GaN-based LED material through manipulation of Eu³⁺ emission (Conference Presentation)

Brandon Mitchell, Volkmar Dierolf, Yasufumi Fujiwara

Author Affiliations +

Proceedings Volume 11302, Light-Emitting Devices, Materials, and Applications XXIV; 113020U (2020) https://doi.org/10.1117/12.2542217
Event: SPIE OPTO, 2020, San Francisco, California, United States

Abstract

In its trivalent form, Europium is well-known for its red emission at ~620 nm; however, transitions at ~590 nm and ~545 nm are also possible if additional excited states are exploited. Using intentional co-doping and energy-transfer engineering, we show that it is possible to attain all three primary colors due to emission originating from two different excited states of the same Eu3+ ion mixed with near band edge emission from GaN centered at ~430 nm. The intensity ratios of these transitions can be controlled by choosing the current injection conditions such as injection current density and duty cycle under pulsed current injection.

Conference Presentation

Citation Download Citation

Brandon Mitchell, Volkmar Dierolf, and Yasufumi Fujiwara "Electrically controlled RGB color tunability in a single GaN-based LED material through manipulation of Eu³⁺ emission (Conference Presentation)", Proc. SPIE 11302, Light-Emitting Devices, Materials, and Applications XXIV, 113020U (9 March 2020); https://doi.org/10.1117/12.2542217

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