Optical properties of yellow-emitting Sr3LaNb3O12:Dy3+ phosphors with an abnormal thermal quenching for white light-emitting diode applications

• Published in: Journal of materials science. Materials in electronics 2022-12, Vol.33 (35), p.26619-26632
• Main Authors: Zhang, Yuchen, Liang, Zhikai, Wang, Weixian, Lin, Yifang, Tang, Rong, Wang, Jingfei, He, Daomiao, Liu, Jinhui, Zhang, Zhong, Zhao, Lingzhi, Deng, Bin, Zhang, Dan, Yu, Ruijin
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Chromaticity; Color temperature; Crystal structure; High temperature; Light emitting diodes; Materials Science; Morphology; Optical and Electronic Materials; Optical properties; Particle size; Phosphors; Photoluminescence; Quenching; Raw materials; Software; Thermal stability; White light
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-022-09374-4

In this study, a series of Sr 3 LaNb 3 O 12 phosphors doped with Dy 3+ ions was prepared by a high-temperature solid-state reaction. The crystal structure, phase purity, particle morphology, photoluminescence (PL) properties, and thermal stability of the phosphors were described. And the Sr 3 LaNb 3 O 12 crystal symmetry is hexagonal. Under the optimal excitation wavelength of 352 nm, the three prominent emission peaks of the Sr 3 LaNb 3 O 12 :Dy 3+ focused on 483 nm ( 4 F 9/2 - 6 H 15/2 ), 575 nm ( 4 F 9/2 - 6 H 13/2 ), and 668 nm ( 4 F 9/2 - 6 H 11/2 ). The optimal Dy 3+ -doped concentration in the Sr 3 LaNb 3 O 12 phosphor was 0.05 mol. The phosphor had an abnormal thermal quenching phenomenon and activation energy ( E a  = 0.29 eV). The prepared white light-emitting diode (w-LED) had a low correlation color temperature of 4162 K, chromaticity coordinates (0.365, 0.368), and the color rendering index 91. The feasibility of the Sr 3 LaNb 3 O 12 :Dy 3+ luminescent material for w-LED was verified by its performance.