Luminescence properties of LaPO4:RE (RE = Dy3+, Eu3+, Sm3+) orthophosphate phosphor for n-UV solid-state lighting prepared by wet chemical synthesis

• Published in: Journal of materials science. Materials in electronics Vol. 34; no. 8; p. 707
• Main Authors: Nandanwar, C. M., Kokode, N. S., Yerpude, A. N., Dhoble, S. J.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.03.2023; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemical synthesis; Chemistry and Materials Science; Crystal structure; Dysprosium; Electric dipoles; Emission spectra; Europium; Lighting; Luminescence; Magnetic dipoles; Materials Science; Optical and Electronic Materials; Optical properties; Phosphors; Photoluminescence; Solid state; Temperature
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-023-10119-0

The synthesis of LaPO 4 :RE (RE = Dy 3+ , Eu 3+ , Sm 3+ ) via a wet chemical method was reported. The prepared phosphor was characterized by XRD, and photoluminescence characteristics were reported. A monoclinic phase was confirmed by X-ray diffraction measurements. Under UV excitation (349 nm), LaPO 4 :Dy 3+ phosphor shows emission at 481 and 575 nm, corresponding to a magnetic dipole ( 4 F 9/2  →  6 H 15/2 ) and electric dipole ( 4 F 9/2  →  6 H 13/2 ) transitions. When LaPO 4 :Eu 3+ phosphor was stimulated at 394 nm, observed emission spectra exhibited prominent bands at 593 and 615 nm, corresponding to magnetic dipole 5 D 0  →  7 F 1 transition with the maximum intensity of emission and electric dipole 5 D 0  →  7 F 2 transition, respectively. When excited at a wavelength of 402 nm, the LaPO 4 :Sm 3+ phosphor shows emission at 562 nm and 597 nm, which correspond to the 4 G 5/2 → 6 H 5/2 and 4 G 5/2 → 6 H 7/2 transitions. The photoluminescence studies show that the LaPO 4 :RE (RE = Dy 3+ , Eu 3+ and Sm 3+ ) phosphors could be applicable in the fields of n-UV-excited solid-state lighting.