Tailoring afterglow properties of polychromatic long-persistent LiMgxSr4-x-2y(BO3)3: y Eu2+ phosphor by codoping with Dy3+ or Nd3+. Issue 1 (1st January 2023)

• Record Type: Journal Article
• Authors: Li, Runze; Li, Huahui; Zhang, Dongyun; Chang, Chengkang
• Is Part Of: Ceramics international. Volume 49:Issue 1(2023)
• Page Start: 1336
• Page End: 1343
• Publication Date: 2023-01-01
• Subjects: LiSr4(BO3)3 -- Redshift -- Afterglow -- Trap concentration -- Thermoluminescence; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.09.114
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Herein, redshifted long persistent LiMg x Sr4- x -2 y (BO3 )3 : y Eu 2+, Dy 3+ (Nd 3+ ) phosphors are successfully prepared in a reducing atmosphere using a high-temperature solid-state process. The emission of phosphors displays redshift characteristics between 633 and 660 nm with an increase in the concentration of Mg 2+ substitution, primarily attributed to enhanced energy level splitting of Eu 2+ after Mg 2+ replacement. The afterglow performance of LiMg0.6 Sr3.4-2 y (BO3 )3 : y Eu 2+, Dy 3+ (Nd 3+ ) samples is enhanced with increase in concentrations of the doped rare-earth ions. An optimal concentration of 6%, the best afterglow performance was achieved because high concentration traps with suitable energy levels were developed; this was confirmed using afterglow measurements and thermoluminescence tests. The Nd 3+ codoped phosphor shows improved afterglow performance compared with the Dy 3+ codoped phosphor at the same doping concentration, which can be attributed to Nd 3+ can easily be incorporated into the borate lattice that generates electron traps with high concentration.