Effect of charge compensators A+ (A+ = Li, Na and K) on photoluminescence properties of Ba2Ca(PO4)2:Eu3+ phosphor for solid state lighting

• Published in: Journal of materials science. Materials in electronics 2023-07, Vol.34 (19), p.1464, Article 1464
• Main Authors: Nandanwar, C. M., Yerpude, A. N., Kokode, N. S., Dhoble, S. J.
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemical synthesis; Chemistry and Materials Science; Chromaticity; Compensators; Emission; Europium; Lighting; Lithium; Luminescence; Materials Science; Morphology; Nitrates; Optical and Electronic Materials; Phosphors; Photoluminescence; Sodium; Solid state
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-023-10889-7

The Ba 2 Ca(PO 4 ) 2 :Eu 3+ phosphors that were co-doped in the alkali metal ions A + (A + = Li, Na and K) to improve their luminescence property were synthesized by wet chemical method. X-ray diffraction confirmed the phase formation. When excited at 394 nm wavelength, the Ba 2 Ca(PO 4 ) 2 :Eu 3+ phosphor showed an emission peak at 591 and 615 nm. The intensity of the Ba 2 Ca(PO 4 ) 2 :Eu 3+ phosphor emission could reach a maximum of 0.5 mol % and then concentration quenching occurs. The emission intensity can be increased by introducing compensator charge A + (A + = Li, Na and K) into the Ba 2 Ca(PO 4 ) 2 :Eu 3+ phosphor. In contrast, all three charge compensators may improve luminescence emission intensity, among these charge compensating ions Li + being the most effective. The chromaticity coordinates of the Ba 2 Ca(PO 4 ) 2 :Eu 3+ , Li + phosphor were ( x  = 0.680, y  = 0.319) according to the CIE. The findings indicate that Ba 2 Ca(PO 4 ) 2 :Eu 3+ , A + (A + = Li, Na and K) phosphors with excellent photoluminescence properties will be used as a component in near-ultraviolet exciting solid state lighting.