ENHANCING PHOTOMETRIC PERFORMANCE OF YAG:Ce CERAMICS: INVESTIGATING THE ROLE OF ANNEALING IN RADIATION-ASSISTED SYNTHESIS

Zhilgildinov Zh.S. Lisitsyn V.M. Karipbayev Zh.T. Tulegenova A.T. Alpyssova G.K. Mussakhanov D.A. Zhunusbekov A.M.
2023 E.A. Buketov Karaganda University Publish house

Eurasian Physical Technical Journal
2023 #20 Issue 2-44 118 - 126 pp.

Ceramic samples of cerium-doped yttrium aluminum garnet (YAG:Ce) were successfully synthesized utilizing a high-powered electron flux field with a considerable energy level of 1.4 MeV and a power density of 23 kW/cm2. The ceramics were formed in a remarkable time span of just one second from a specifically prepared mix of yttrium, aluminum, and cerium oxides. The process of radiation-assisted synthesis of ceramics within radiation flux fields fundamentally deviates from the methodologies commonly employed today. Analyzed diffraction patterns closely align with those documented for YAG:Ce crystals, both in peak position and proportion. Furthermore, every sample consistently demonstrated a space group symmetry of Ia-3d. The luminescence and excitation spectra of ceramics synthesized in this study closely resemble those of YAG:Ce ceramics produced by other methods and YAG:Ce - based phosphors. The luminescence bands exhibit high efficiency, and the intensity ratios of the UV bands vary among the studied phosphors. The ceramics radiation-to-luminescence conversion efficiency was found to be impressive, achieving scores of 0.57 and 0.48 in the industrial phosphors SDL 4000 and YAG-02, respectively. It was also observed that an increase in quantum efficiency of the samples could be achieved via high-temperature annealing. High conversion efficiency underscores the potential of the outlined luminescent ceramics synthesis method.

luminescence , radiation-assisted synthesis , structure , synthesis , YAG:Ce ceramics

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L.N. Gumilyov Eurasian National University, Astana, Kazakhstan
National Tomsk Polytechnic University, Tomsk, Russian Federation
Al-Farabi Kazakh National University, Almaty, Kazakhstan
E.A Buketov University, Karaganda, Kazakhstan

L.N. Gumilyov Eurasian National University
National Tomsk Polytechnic University
Al-Farabi Kazakh National University
E.A Buketov University

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