Preparation and luminescence properties of novel K2ZnP2O7: Mn2+ green phosphor

• Published in: Journal of materials science. Materials in electronics Vol. 32; no. 23; pp. 27475 - 27483
• Main Authors: Belbal, Rim, Gacem, Lakhdar, Bentria, Bachir, Saidat, Boubakeur, Soltani, Mohamed Toufik, Guerbous, Lakhdar
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.12.2021; Springer Nature B.V
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Fourier transforms; Infrared spectroscopy; Ion concentration; Luminescence; Manganese ions; Materials Science; Optical and Electronic Materials; Optical properties; Original Research; Phosphors; Photoluminescence
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-021-07123-7

Novel green-emitting phosphors K 2 Zn 1 − x P 2 O 7 : x mol% Mn 2+ have been successfully prepared using classical solid-state reaction method in air atmosphere, doped by different Mn 2+ ion contents, namely x  = 0.5, 1, 1.25 and 1.5 mol%. The samples were characterized by the thermogravimetric (ATD/ATG/DSC), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), steady and time-resolved photoluminescence techniques. It was found that all K 2 Zn 1 − x P 2 O 7 : x mol% Mn 2+ samples crystallize in the tetragonal phase with P4 2 /mnm space group. Upon 425 nm excitation, K 2 ZnP 2 O 7 : Mn 2+ exhibits an intense broad green asymmetric emission band peaking at 520 nm, owing to the 4 T 1 → 6 A 1 ( 6  S) transition of Mn 2+ ion in K 2 ZnP 2 O 7 . In addition, it is suggested that Mn 2+ ions occupy more than one symmetry site in the host K 2 ZnP 2 O 7 . The optimal Mn 2+ ion concentration in K 2 ZnP 2 O 7 :Mn 2+ phosphor is 1 mol % and with the lifetime 9.81 ms.