Luminescence Properties of Si3N4 Doped Nitride Sr3SiO5: Eu2+ Phosphor

doi:10.15541/jim20160327

Abstract

Abstract:

Si₃N₄ doped Sr_2.99SiO_5-6_xN₄_x:0.01Eu²⁺ phosphorssampless were prepared by high temperature solid-state reaction method. Testing results of XRD, EDS and CHNS of the phosphor samples demonstrated that the nitrogen atoms could be incorporated into the host lattice of Sr₃SiO₅ through partial occupation of the oxygen atoms sites to form Sr_2.99SiO_5-6_xN₄_x:0.01Eu²⁺solid solution. Under the excitation of 344 nm ultraviolet, the Sr_2.99SiO_5-6_xN₄_x: 0.01Eu²⁺ phosphor samples emit orange lights peaked at 580 nm, which originates from 4f⁶5d¹→4f⁷ transitions of Eu²⁺ ions. With the increase of N³⁺-ions concentration, the intensities of emission and excitation spectra of Sr_2.99SiO_5-6_xN₄_x: 0.01Eu²⁺ phosphor samples are obviously enhanced. The thermal stability testing results of the phosphor samples show that the incorporation of N^3-ions significantly improve the thermal stability better than that of undoped samples. The curves analyzed and fitted by the Arrhennius formula model indicate that the quenching temperature is caused by crossover process.

Key words: Sr3SiO5, phosphors, Si3N4

CLC Number:

O482

ZHANG Shuang-Shuang, TIAN Wen-Yu, ZHANG Jian-Xin, SONG Kai-Xin, QIN Hui-Bin. Luminescence Properties of Si₃N₄ Doped Nitride Sr₃SiO₅: Eu²⁺ Phosphor[J]. Journal of Inorganic Materials, 2017, 32(3): 252-256.

Figures/Tables 8

Fig. 1 XRD patterns of Sr2.99SiO5-6xN4x:0.01Eu2+ phosphors

Fig. 2 SEM images of Sr2.99SiO5-6xN4x:0.01Eu2+(x= 0 , 0.1, 0.2 and 0.3)

Fig. 3 The EDS of Sr2.99SiO5-6xN4x:0.01Eu2+ (a) x=0; (b) x=0.1

Fig. 4 Emission spectra of Sr3SiO5:xEu2+ phosphors

Fig. 5 Excitation (a) and emission (b) spectra of Sr2.99SiO5-6xN4x:0.01 Eu2+ (x = 0, 0.05, 0,1, 0,2, 0.3)

Fig. 6 Thermostability pattern of Sr2.99SiO5-6xN4x:0.01Eu2+ phosphors as function of x

Fig. 7 Coordinate figure of thermal quenching

Fig. 8 Thermostability fitting curve of Sr2.99SiO5-6xN4x: 0.01Eu2+ phosphors by using Arrhennius equation

References 11

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Luminescence Properties of Si₃N₄ Doped Nitride Sr₃SiO₅: Eu²⁺ Phosphor

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