Detection of In segregation in InGaN by using Eu as a probe

Takatsu, Junichi; Mitchell, Brandon; Koizumi, Akira; Yamanaka, Shuhei; Matsuda, Masaaki; Gregorkiewicz, T.; Kojima, Takanori; Fujiwara, Yoshihiro

doi:10.1016/j.jcrysgro.2016.12.101

Cited by 2 publications

(2 citation statements)

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“…Further improvement on the blue edge of the CIE triangle could be achieved by using In rather than Mg and Si as a codopant. Some In would couple to Eu atoms and create new Eu centers, but this will also allow for tunability of the blue emission toward 460 nm . Alternatively, enhancement of the 5 D 2 state emission, which ranges from 470 to 520 nm, could be explored …”

Section: Discussionmentioning

confidence: 99%

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Color-Tunablility in GaN LEDs Based on Atomic Emission Manipulation under Current Injection

et al. 2019

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The development of efficient electrically driven color-tunable solid-state light sources will enable new capabilities in lighting and display technologies. Although alternative light sources such as organic light emitting diodes (O-LEDs) have recently gained prominence, GaN-based LEDs remain the most efficient light sources available, making GaN the ideal platform for color-tunable devices. In its trivalent form, Europium is well-known for its red emission at ∼620 nm; however, transitions at ∼590 and ∼545 nm are also possible if additional excited states are exploited. Using intentional codoping and energy-transfer engineering, we show that it is possible to attain all three primary colors due to an 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.

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Section: Discussionmentioning

confidence: 99%

“…Some In would couple to Eu atoms and create new Eu centers, but this will also allow for tunability of the blue emission toward 460 nm. 50 Alternatively, enhancement of the 5 D 2 state emission, which ranges from 470 to 520 nm, could be explored. 26…”

Section: Acs Photonicsmentioning

confidence: 99%