Effect of microwave time on the structural and luminescence properties of YAG:Ce prepared by microwave solution combustion (MSC) synthesis
| Autor: | Way Foong Lim, Khai Shenn Lau, Hock Jin Quah, Zainuriah Hassan, Sabah M. Mohammad |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
chemistry.chemical_element Phosphor 02 engineering and technology 021001 nanoscience & nanotechnology Combustion 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials law.invention 010309 optics Crystallinity chemistry.chemical_compound Cerium chemistry Chemical engineering Yttrium aluminium garnet law 0103 physical sciences Electrical and Electronic Engineering 0210 nano-technology Luminescence Microwave Light-emitting diode |
| Zdroj: | Optik. 212:164437 |
| ISSN: | 0030-4026 |
| DOI: | 10.1016/j.ijleo.2020.164437 |
| Popis: | Microwave solution combustion (MSC) synthesis is an attractive synthesis method to produce luminescent phosphor materials. The combustion reaction triggered by the interaction between microwave radiation and reducing agents (fuels) can produce high quality nano-sized materials. In this work, yttrium aluminium garnet (YAG) doped with 0.3 mol % cerium ( C e 3 + ) was synthesized with MSC method and later fabricated with a blue LEDs to generate white light. The effect of different microwave time on structural, morphological and optical properties of the resulting phosphor materials were investigated. Results showed that the crystallinity of the YAG:Ce crystallinity was improved when the microwave time was increased. The phosphor powders have exhibited porous and coral-like morphology, which signified that precursors materials have successfully undergone crystal grain growth from the combustion process. Luminescence properties of YAG:Ce was due to the occurrence of an electronic transition from 4f ground state to the 5d excited state. The fabricated white LEDs (w-LEDs) have shown a higher emission intensity around yellow region was achieved when the microwave time was increased. |
| Databáze: | OpenAIRE |
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