Synthesis and photoluminescence properties of AlPO4:Ln (Ln = Dy3+, Eu3+ and Sm3+) phosphors for near UV-based white LEDs application

• Published in: Indian journal of physics 2024-03, Vol.98 (3), p.1083-1093
• Main Authors: Nandanwar, C. M., Yerojwar, R. M., Kokode, N. S., Yerpude, A. N., Dhoble, S. J.
• Format: Article
• Language: English
• Subjects: Aluminum phosphate; Astrophysics and Astroparticles; Crystal structure; Dysprosium; Electric dipoles; Emission spectra; Europium; Magnetic dipoles; Optical properties; Original Paper; Phosphors; Photoluminescence; Physics; Physics and Astronomy; X ray powder diffraction
• ISSN: 0973-1458; 0974-9845
• DOI: 10.1007/s12648-023-02853-2

A series of AlPO 4 :Ln (Ln = Dy 3+ , Eu 3+ and Sm 3+ ) phosphors were synthesized by the combustion technique. The phosphor’s XRD and luminescent properties were thoroughly investigated. The trigonal crystal structure with the space group P 31 2 1 (152) was verified by X-ray powder diffraction. Under UV excitation (350 nm), AlPO 4 :Dy 3+ phosphor shows emission peaks at 484 and 574 nm, respectively. When AlPO 4 :Eu 3+ phosphor was excited at 395 nm, the emission spectra showed strong bands at 592 and 615 nm. When stimulated at 403 nm, the emission spectra of AlPO 4 :Sm 3+ phosphor showed an emission peak at 565 nm generated by a purely magnetic dipole, a second peak at 646 nm produced by a purely electric dipole and a third peak at 599 nm generated by both magnetic and electric dipoles, respectively. Our research showed that AlPO 4 :Ln (Ln = Dy 3+ , Eu 3+ and Sm 3+ ) was a blue-yellow, orange-red, and yellow-orange-red emitting phosphor, which provides an excellent candidate for solid-state lighting, specifically for n-UV w-LED applications.