Ce-doped YAG phosphor powder synthesized via microwave combustion and its application for white LED

Husnen R. Abd; Zainuriah Hassan; Naser M. Ahmed; Forat H. Alsultany; Ahmad Fairuz Omar

doi:10.1117/1.OE.58.2.027110

14 February 2019 Ce-doped YAG phosphor powder synthesized via microwave combustion and its application for white LED

Husnen R. Abd, Zainuriah Hassan, Naser M. Ahmed, Forat H. Alsultany, Ahmad Fairuz Omar

Author Affiliations +

Funded by: Malaysia Ministry of Education (MOE)

Optical Engineering, Vol. 58, Issue 2, 027110 (February 2019). https://doi.org/10.1117/1.OE.58.2.027110

Abstract

Cerium-doped yttrium aluminum garnet (YAG : Ce^3 +) powder phosphor have been extensively studied as phosphors for blue to white light conversion. Y_{(3 − x)}Al₅O₁₂ : x Ce^3 + (x = 2.0 at. %) were successfully synthesized by microwave-assisted combustion (MW) using the organic fuel urea. A direct conversion from the amorphous phase to the cubic one was obtained at 1050°C for 5 h, together with an increase in the particle size into the range of 50 to 60 nm and decrease in the specific surface area. The as-prepared precursors and powder sintered at 1050°C were characterized for their structure, particle size, morphology, electroluminescence properties, and chromaticity by x-ray diffraction, Brunauer–Emmett–Teller method, Fourier transform infrared spectroscopy, field emission-scanning electron microscopy, transmission electron microscopy, electroluminescence, and standard CIE 1931 chromaticity analysis (CIE) chromaticity diagram, respectively. The results show that the obtained sintered YAG : Ce^3 + phosphor powder has spherical-shaped particles and strong yellow emission compared to as-prepared phosphor powder. White light emitting diodes with proper color rendering index, and tunable correlated color temperature properties can be produced by controlling the injection currents and coating thickness of the sample, offering daylight white and neutral white LEDs.

Citation Download Citation

Husnen R. Abd, Zainuriah Hassan, Naser M. Ahmed, Forat H. Alsultany, and Ahmad Fairuz Omar "Ce-doped YAG phosphor powder synthesized via microwave combustion and its application for white LED," Optical Engineering 58(2), 027110 (14 February 2019). https://doi.org/10.1117/1.OE.58.2.027110

Received: 4 October 2018; Accepted: 24 January 2019; Published: 14 February 2019

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KEYWORDS

YAG lasers

Cerium

Particles

Light emitting diodes

Combustion

Crystals

Electroluminescence

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