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Proceedings Paper

Electrically controlled RGB color tunability in a single GaN-based LED material through manipulation of Eu3+ emission (Conference Presentation)
Author(s): Brandon Mitchell; Volkmar Dierolf; Yasufumi Fujiwara

Paper 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.

Paper Details

Date Published: 9 March 2020
Proc. SPIE 11302, Light-Emitting Devices, Materials, and Applications XXIV, 113020U (9 March 2020); doi: 10.1117/12.2542217
Show Author Affiliations
Brandon Mitchell, West Chester Univ. (United States)
Volkmar Dierolf, Lehigh Univ. (United States)
Yasufumi Fujiwara, Osaka Univ. (Japan)

Published in SPIE Proceedings Vol. 11302:
Light-Emitting Devices, Materials, and Applications XXIV
Jong Kyu Kim; Michael R. Krames; Martin Strassburg, Editor(s)

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