Losses of Energy in Phosphor of LED at Transformation of Emission Spectrum

Ju, Yang; Лисицын, В. М.; Lukash, V. S.

doi:10.12783/dtetr/apetc2017/11085

Cited by 1 publication

(1 citation statement)

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“…Phosphors based on yttrium aluminum garnet doped with cerium-YAG:Ce (Y 3 A 5 O 12 : Ce)-are highly promising for use in light-emitting diodes (LEDs) [1,2]. LEDs incorporating YAG:Ce phosphors have demonstrated luminous efficiency (LE) of up to 150 lm/W, with a theoretical maximum of 250-300 lm/W [3]. The improved conversion efficiency of UV radiation from the LED chip to light by the phosphor could lead to a significant increase in luminous efficiency.…”

Section: Introductionmentioning

confidence: 99%

Effect of Precursor Prehistory on the Efficiency of Radiation-Assisted Synthesis and Luminescence of YAG:Ce Ceramics

et al. 2023

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The quality of synthesized materials is affected by various factors such as the prehistory of substances used and the synthesis technology. Most methods for synthesizing luminescent ceramics based on metal oxides rely on high-temperature heating to facilitate the necessary exchange of elements between precursor particles. However, a promising alternative method involves the direct application of a powerful high-energy radiation flux, which stimulates different processes. The formation of ceramics through this method occurs in a highly ionized medium, which may produce different results from those achieved through thermal exposure. This paper reports the findings of a study that explores the relationship between the morphology and luminescent properties of YAG:Ce ceramics and the characteristics of Y2O3 and Al2O3 oxides used in the synthesis, such as dispersity and activator concentration. The results indicate that the morphology of the synthesized ceramic samples is significantly affected by the dispersity of the powder mixture used.

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Section: Introductionmentioning

confidence: 99%