Synthesis, Structural Characterization and Optical Investigation of Combustion-Derived K₃AlO₃:Ce³⁺ (2 mol%) Wide Band Gap Phosphor

Author(s)	Dr. Mohan Amrutrao Gaikwad
Country	India
Abstract	K₃AlO₃:Ce³⁺ (2 mol%) phosphor was successfully synthesized via a rapid solution combustion method. Structural, optical, and electronic properties were systematically investigated to evaluate its potential as a UV-excitable phosphor material. Photoluminescence excitation and emission spectra reveal strong ultraviolet absorption and broad emission characteristics attributed to allowed 5d → 4f transitions of Ce³⁺ ions. Gaussian deconvolution confirms broad-band luminescence resulting from crystal field splitting of Ce³⁺ 5d states. Tauc analysis indicates a direct optical band gap of approximately 5.2 eV, confirming the wide band gap nature of the K₃AlO₃ host lattice. Ce³⁺ incorporation significantly enhances luminescence intensity without altering the intrinsic band structure. The results demonstrate that combustion-synthesized K₃AlO₃:Ce³⁺ is a promising candidate for UV-driven optoelectronic and phosphor applications.
Keywords	K₃AlO₃; Ce³⁺ phosphor; Combustion synthesis; Photoluminescence; Wide band gap oxide; Tauc analysis; Energy level diagram
Field	Physical Science
Published In	Volume 17, Issue 1, January-March 2026
Published On	2026-03-25

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