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Shakhno, Anna; Gorbenko, Vitaliy; Zorenko, Tetiana; Fedorov, Aleksandr; Zorenko, Yuriy, 2025, "Optical and Photoconversion Properties of Ce³⁺ Doped (Ca,Y)3(Mg,Sc)2Si₃O₁₂ Films grown by LPE method onto YAG and YAG:Ce Substrates", https://doi.org/10.18150/ZLQ6MO, RepOD, V1
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This work presents a comprehensive study of the structural, luminescent, and photoconversion properties of epitaxial composite phosphor converters based on single crystalline films of Ce3+-activated Ca2−xY1+xMg1+xSc1−xSi3O12:Ce (x = 0–0.25) (CYMSSG:Ce) garnet, grown using the liquid phase epitaxy (LPE) method on single-crystal Y3Al5O12 (YAG) and YAG:Ce substrates. The main goal of this study is to elucidate the structure–composition–property relationships that influence the photoluminescence and photoconversion efficiency of these film–substrate composite converters, aiming to optimize their performance in high-power white light-emitting diode (WLED) applications. Systematic variation in the Y3+/Sc3+/Mg2+ cationic ratios within the garnet structure, combined with the controlled tuning of film thickness (ranging from 19 to 67 µm for CYMSSG:Ce/YAG and 10–22 µm for CYMSSG:Ce/YAG:Ce structures), enabled the precise modulation of their photoconversion properties. Prototypes of phosphor-converted WLEDs (pc-WLEDs) were developed based on these epitaxial structures to assess their performance and investigate how the content and thickness of SCFs affect the colorimetric properties of SCFs and composite converters. Clear trends were observed in the Ce3+ emission peak position, intensity, and color rendering, induced by the Y3+/Sc3+/Mg2+ cation substitution in the film converter, film thickness, and activator concentrations in the substrate and film. These results may be useful for the design of epitaxial phosphor converters with tunable emission spectra based on the epitaxially grown structures of garnet compounds.
mixed garnets, Ca-Mg-Si based garnets, Ce3+ dopant, liquid phase epitaxy, single crystalline films, substrates, luminescence, phosphor-converters
A. Shakhno, V. Gorbenko, T. Zorenko, A. Fedorov, Y. Zorenko, Optical and Photoconversion Properties of Ce3+-Doped (Ca,Y)3(Mg,Sc)2Si3O12 Films Grown via LPE Method onto YAG and YAG:Ce Substrates, Materials 18 (2025) 3590. https://doi.org/10.3390/ma18153590. https://www.mdpi.com/3427820 doi: 10.3390/ma18153590
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