Luminescence and thermal-quenching properties of silicate-based red-emitting K4CaSi3O9:Eu3+ phosphor

• Published in: Journal of materials science. Materials in electronics 2018-04, Vol.29 (7), p.5975-5981
• Main Authors: Zhao, Lei, Fan, Feiyue, Chen, Xiao, Wang, Yaoan, Li, Yanyan, Deng, Bin
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemical synthesis; Chemistry and Materials Science; Crystallization; Diodes; Europium; Light emitting diodes; Materials Science; Optical and Electronic Materials; Organic light emitting diodes; Phosphors; Photoluminescence; Quenching; Saturation (color); Thermal stability
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-018-8571-9

A series of novel silicate-based red-emitting K 4 Ca 1− x Si 3 O 9 : x Eu 3+ ( x  = 0.01–0.30) phosphors were successfully synthesized via a high-temperature solid-state reaction method for the first time. The compounds were crystallized in the cubic structure with the space group Pa 3 ¯ . The photoluminescence spectrum of K 4 CaSi 3 O 9 :Eu 3+ phosphor shows four peaks assigned to the 5 D 0 – 7 F J (J = 0, 1, 2, 3 and 4) transitions of Eu 3+ upon 396 nm excitation. Judd–Ofelt intensity parameters and CIE were calculated from the photoluminescence data. The quenching temperature for K 4 CaSi 3 O 9 :0.30Eu 3+ was estimated to be above 500 K. The superior thermal stability can be attributed to the rigid structure of the host. The good color saturation and high thermal stability indicate that K 4 CaSi 3 O 9 :Eu 3+ phosphor is a potential candidate for light-emitting diodes.