Enhanced thermal stability and afterglow performance in Sr2Ga2−xAlxSiO7:Ce3+ phosphors via band gap tailoring. Issue 1 (18th November 2021)

• Record Type: Journal Article
• Authors: Zhou, Rongfu; Ma, Fengkai; Yang, Yunlin; Deng, Tingting; Li, Jingwei; Zhao, Hongting; Sheng, Jie; Peng, Qi
• Is Part Of: Inorganic chemistry frontiers. Volume 9:Issue 1(2022)
• Page Start: 23
• Page End: 34
• Publication Date: 2021-11-18
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1qi01152a
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : Due to the change of band gap, the photoluminescence and persistent luminescence performances of Ce 3+ in Sr2 (Ga, Al)2 SiO7 have been optimized by the regulation of Al 3+ /Ga 3+ . Abstract : In this study, the regulation of Al 3+ /Ga 3+ on Sr2 (Ga, Al)2 SiO7 :Ce 3+ phosphors is demonstrated to enhance the photoluminescence and persistent luminescence (PersL) performances of Ce 3+ . With the replacement of Al 3+, the emission band of Ce 3+ shifts to the longer wavelength side, thermal stability of Ce 3+ emission becomes better, and Ce 3+ persistent luminescence shows stronger intensity and longer lifetime. To get insight into the structure-luminescence relationship, the influences of Al 3+ /Ga 3+ on the structure of Sr2 (Ga, Al)2 SiO7 :Ce 3+, 4f–5d i ( i = 1–5) transition energies of Ce 3+ and trap distributions are discussed. With the construction of the vacuum referred binding energy scheme and analysis of a series of thermoluminescence (TL) spectra, the increase of band gap is found to tune the trap depths and change persistent luminescence performances of Ce 3+ in Sr2 (Ga, Al)2 SiO7 . Finally, with the stimulation of a 1060 nm laser, the optimized Sr2 (Ga, Al)2 SiO7 :Ce 3+ phosphors show strong persistent luminescence of Ce 3+, suggesting the potential for application in optical storage.