LPE growth of Tb3Al5O12:Ce single crystalline film converters for WLED application

Markovskyi A, Gorbenko V, Zorenko T, Yokosawa T, Will J, Spiecker E, Batentschuk M, Elia J, Fedorov A, Zorenko Y (2021)

Publication Type: Journal article

Publication year: 2021

Journal

CrystEngComm Royal Society of Chemistry

DOI: 10.1039/d1ce00268f

Abstract

The possibility of development of an efficient phosphor converters (PC) for white LED (WLED) based on single crystalline films (SCF) of Ce3+ doped Tb3Al5O12 garnet (TbAG:Ce), grown using liquid-phase epitaxy method onto Y3Al5O12 (YAG) substrates, is evidenced for the first time in this work. The detail investigation of the structural properties of the TbAG:Ce SCF/YAG epitaxial structures was performed. High-resolution scanning transmission electron microscopy and composition analysis revealed an interface with high structural quality including the formation of a transition layer with a 5-7 nm thickness between TAG:Ce SCF and YAG substrate. The transition layer consisted of solid solutions between Tb3Al5O12:Ce and Y3Al5O12 garnets gradually changing from undoped YAG in substrate towards TbAG:Ce in the film and allowed to reduce the mismatch-stress. The absorption, cathodoluminescence, photoluminescence properties of TbAG:Ce SCFs were investigated as well. Furthermore, the dependence of photoconversion properties on the film thicknesses was studied to construct the prototype of efficient warm white LEDs. The change in the crystal thickness enabled tuning of the white light tons from cold white/daylight to neutral white. These results can be useful for the development of a novel generation of phosphor converters for white LEDs.

Authors with CRIS profile

Tadahiro Yokosawa Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Johannes Will Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Erdmann Spiecker Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Miroslaw Batentschuk Institute Materials for Electronics and Energy Technology (i-MEET) Jack Elia Institute Materials for Electronics and Energy Technology (i-MEET)

Additional Organisation(s)

Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung) Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)

Involved external institutions

Kazimierz Wielki University in Bydgoszcz / Uniwersytet Kazimierza Wielkiego w Bydgoszcz (UKW) PL Poland (PL) National Academy of Sciences of Ukraine (NAN) / Національна академія наук України UA Ukraine (UA)

How to cite

APA:

Markovskyi, A., Gorbenko, V., Zorenko, T., Yokosawa, T., Will, J., Spiecker, E.,... Zorenko, Y. (2021). LPE growth of Tb3Al5O12:Ce single crystalline film converters for WLED application. CrystEngComm. https://doi.org/10.1039/d1ce00268f

MLA:

Markovskyi, A., et al. "LPE growth of Tb3Al5O12:Ce single crystalline film converters for WLED application." CrystEngComm (2021).

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