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Zorenko, Yuriy, 2024, "Development of Three-Layered Composite Color Converters for White LEDs Based on the Epitaxial Structures of YAG:Ce, TbAG:Ce and LuAG:Ce Garnets", https://doi.org/10.18150/9QZYYG, RepOD, V1
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This work was dedicated to the development of novel types of composite phosphor converters of white LED, based on the epitaxial structures containing Y3Al5O12:Ce (YAG:Ce) and Tb3Al5O12:Ce (TbAG:Ce) single crystalline films, steeply grown, using the liquid-phase epitaxy method, onto LuAG:Ce single crystal substrates. The influence of Ce3+ concentration in the LuAG:Ce substrate, as well as the thickness of the subsequent YAG:Ce and TbAG:Ce films, on the luminescence and photoconversion properties of the three-layered composite converters were investigated. Compared to its traditional YAG:Ce counterpart, the developed composite converter demonstrates broadened emission bands, due to the compensation of the cyan–green dip by the additional LuAG:Ce substrate luminescence, along with yellow–orange luminescence from the YAG:Ce and TbAG:Ce films. Such a combination of emission bands from various crystalline garnet compounds allows the production of a wide emission spectrum of WLEDs. In turn, the variation in the thickness and activator concentration in each part of the composite converter allows the production of almost any shade from green to orange emission on the chromaticity diagram.
single crystalline films, liquid-phase epitaxy, mixed garnets, Ce3+ ions, composite film-crystal photoconverter, Planar-Chip-Level Conversion, white LEDs
Markovskyi A, Gorbenko V, Zorenko T, Witkiewicz-Lukaszek S, Sidletskiy O, Fedorov A, Zorenko Y. Development of Three-Layered Composite Color Converters for White LEDs Based on the Epitaxial Structures of YAG:Ce, TbAG:Ce and LuAG:Ce Garnets. Materials. 2023; 16(5):1848. https://www.mdpi.com/2156992 doi: https://doi.org/10.3390/ma16051848
CC BY - Creative Commons Attribution 4.0
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