Micropowder Ca2YMgScSi3O12:Ce Silicate Garnet as an Efficient Light Converter for White LEDs

Shakhno A, Markovskyi A, Zorenko T, Witkiewicz-Lukaszek S, Vlasyuk Y, Osvet A, Elia J, Brabec C, Batentschuk M, Zorenko Y (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Materials MDPI

Book Volume: 15

Journal Issue: 11

DOI: 10.3390/ma15113942

Abstract

This work is dedicated to the crystallization and luminescent properties of a prospective Ca2YMgScSi3O12:Ce (CYMSSG:Ce) micropowder (MP) phosphor converter (pc) for a white light-emitting LED (WLED). The set of MP samples was obtained by conventional solid-phase synthesis using different amounts of B2O3 flux in the 1-5 mole percentage range. The luminescent properties of the CYMSSG:Ce MPs were investigated at different Ce3+ concentrations in the 1-5 atomic percentage range. The formation of several Ce3+ multicenters in the CYMSSG:Ce MPs was detected in the emission and excitation spectra as well as the decay kinetics of the Ce3+ luminescence. The creation of the Ce3+ multicenters in CYMSSG:Ce garnet results from: (i) the substitution by the Ce3+ ions of the heterovalent Ca2+ and Y3+ cations in the dodecahedral position of the garnet host; (ii) the inhomogeneous local environment of the Ce3+ ions when the octahedral positions of the garnet are replaced by heterovalent Mg2+ and Sc3+ cations and the tetrahedral positions are replaced by Si4+ cations. The presence of Ce3+ multicenters significantly enhances the Ce3+ emission band in the red range in comparison with conventional YAG:Ce phosphor. Prototypes of the WLEDs were also created in this work by using CYMSSG:Ce MP films as phosphor converters. Furthermore, the dependence of the photoconversion properties on the layer thickness of the CYMSSG:Ce MP was studied as well. The changes in the MP layer thickness enable the tuning of the white light thons from cold white/daylight to neutral white. The obtained results are encouraging and can be useful for the development of a novel generation of pcs for WLEDs.

Authors with CRIS profile

Andres Osvet Institute Materials for Electronics and Energy Technology (i-MEET) Jack Elia Institute Materials for Electronics and Energy Technology (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET) Miroslaw Batentschuk Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

Kazimierz Wielki University in Bydgoszcz / Uniwersytet Kazimierza Wielkiego w Bydgoszcz (UKW) PL Poland (PL)

How to cite

APA:

Shakhno, A., Markovskyi, A., Zorenko, T., Witkiewicz-Lukaszek, S., Vlasyuk, Y., Osvet, A.,... Zorenko, Y. (2022). Micropowder Ca2YMgScSi3O12:Ce Silicate Garnet as an Efficient Light Converter for White LEDs. Materials, 15(11). https://dx.doi.org/10.3390/ma15113942

MLA:

Shakhno, Anna, et al. "Micropowder Ca2YMgScSi3O12:Ce Silicate Garnet as an Efficient Light Converter for White LEDs." Materials 15.11 (2022).

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