Novel Sm3+-activated YCa4O(BO3)3 phosphors with high quantum efficiency and thermal stability for red-backlight display and indoor illumination. Issue 6 (15th March 2023)

• Record Type: Journal Article
• Authors: Tang, Zhuo; Sun, Zhigang; Zheng, Yanqing; Chen, Guojian; Li, Xiaohua; Jiang, Linwen
• Is Part Of: Ceramics international. Volume 49:Issue 6(2023)
• Page Start: 10064
• Page End: 10072
• Publication Date: 2023-03-15
• Subjects: Phosphors -- YCOB -- Luminescence -- Thermal stability -- White LEDs; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2022.11.187
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Novel Sm 3+ -activated YCa4 O(BO3 )3 (YCOB) phosphors with high color purity, excellent thermal stability and high luminescence quantum efficiency were developed. Upon 405 nm excitation, all samples displayed strong orange-red emissions. The crystal structure and luminescence characteristics of YCOB in relation to Sm 3+ concentrations were explored. The optimal doping concentration was found to be 5% mol with remarkable color purity of 97.73%. The concentration quenching mechanism in YCOB host lattices was dominated by dipole-dipole interaction. Meanwhile, temperature-dependent luminescence spectra revealed that the investigated phosphors have excellent thermal stability. Impressively, it was calculated that the internal quantum efficiency of synthesized phosphors was as high as 76.54%. To further verify the practicability of synthesized phosphors, both red light-emitting diodes and white light-emitting diodes were fabricated using YCOB: 5%Sm 3+ phosphors, and they exhibited bright red and white light, respectively. These results suggest that the novel YCOB: Sm 3+ phosphors with high quantum efficiency and luminescent stability were promising for red-backlight display and indoor illumination. Graphical abstract: Image 1