Abstract
A series of novel silicate-based red-emitting K4Ca1−xSi3O9:xEu3+ (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\(\overline {3}\). The photoluminescence spectrum of K4CaSi3O9:Eu3+ phosphor shows four peaks assigned to the 5D0–7FJ (J = 0, 1, 2, 3 and 4) transitions of Eu3+ upon 396 nm excitation. Judd–Ofelt intensity parameters and CIE were calculated from the photoluminescence data. The quenching temperature for K4CaSi3O9:0.30Eu3+ 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 K4CaSi3O9:Eu3+ phosphor is a potential candidate for light-emitting diodes.
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Acknowledgements
This work supported by the National Natural Science Foundation of China (11647008); the Baoji University of Arts and Sciences Key Research (ZK16071, ZK15041). The authors thank Hunan provincial key laboratory of Xiangnan rare-precious metals compounds and applications and the construct program of the key discipline in Hunan province for financial support. The authors declare that there are no conflicts of interest related to this article.
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Zhao, L., Fan, F., Chen, X. et al. Luminescence and thermal-quenching properties of silicate-based red-emitting K4CaSi3O9:Eu3+ phosphor. J Mater Sci: Mater Electron 29, 5975–5981 (2018). https://doi.org/10.1007/s10854-018-8571-9
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DOI: https://doi.org/10.1007/s10854-018-8571-9