Preparation and optical properties of Eu-Pr/Nd co-doped CaAlO long afterglow luminescent materials

• Published in: New journal of chemistry 2024-01, Vol.48 (4), p.1547-1558
• Main Authors: Zhang, Ning, Zeng, Qingling, Yin, Chunhua, Guo, Dongcai
• Format: Article
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/d3nj05121h

A long afterglow material CaAl 2 O 4 :Eu 2+ ,Pr 3+ emitting blue light has been synthesized by a high-temperature solid-phase method. The effect of a series of preparation conditions on CaAl 2 O 4 :Eu 2+ ,Pr 3+ was first investigated using a single-factor preference method, and the optimal synthesis conditions were then obtained through orthogonal tests. The target products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), elemental mapping, fluorescence spectroscopy, and afterglow properties. The XRD results indicate the successful synthesis of CaAl 2 O 4 :Eu 2+ ,Pr 3+ materials, which was further verified by XPS analysis. The afterglow properties of the target products were further improved by doping with Nd 3+ under optimum conditions obtained from orthogonal tests. The improvement was analyzed through XRD, fluorescence, afterglow and thermoluminescence analysis. The results indicate that doping with Nd 3+ in CaAl 2 O 4 :Eu 2+ ,Pr 3+ materials significantly enhanced the afterglow properties, including an initial brightness of 2318 mcd m −2 and a duration of 26.5 hours. Thanks to its excellent blue long afterglow luminescence, the material is anticipated to have applications in energy-efficient lighting systems and solar energy systems. A long afterglow material, CaAl 2 O 4 :Eu 2+ ,Pr 3+ /Nd 3+ , emitting blue light has been synthesized by a high-temperature solid-phase method.