Citation: WANG Fei, TIAN Yi-Guang, ZHANG Qiao. Lattice Parameters and Luminescent Property of Single-Phase White Light-Emitting Ca_0.955-xAl₂Si₂O₈: 0.045Eu²⁺, xMn²⁺ Phosphors[J]. Chinese Journal of Inorganic Chemistry, ;2019, 35(1): 25-33. doi: 10.11862/CJIC.2019.003 shu

Lattice Parameters and Luminescent Property of Single-Phase White Light-Emitting Ca_0.955-xAl₂Si₂O₈: 0.045Eu²⁺, xMn²⁺ Phosphors

WANG Fei ^1,2,, ,
TIAN Yi-Guang ^3,, ,
ZHANG Qiao ³

1.
Experimental Center of Anhui Sanlian University, Hefei 230601, China
2.
College of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China
3.
College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China

Corresponding author: WANG Fei, wangfchina@163.com TIAN Yi-Guang, gytian@wzu.edu.cn
Received Date: 7 August 2018
Revised Date: 23 October 2018

Figures(9)

A series of phosphors Ca_0.955-xAl₂Si₂O₈:0.045Eu²⁺, xMn²⁺ (x=0, 0.05, 0.10, 0.15, 0.20, 0.25, 0.30, 0.325, 0.35, 0.375, 0.40, 0.425) were prepared via solid-state reaction. As Mn²⁺ was substituted for Ca²⁺ into the crystal lattice, the effect on its lattice parameters and spectral properties were discussed. The results show that complete solid solutions were formed in the whole range for x while Mn²⁺ enterers CaAl₂Si₂O₈ lattice and substitutes for Ca²⁺. The samples belong to triclinic system, and P1 space group. The lattice parameters (a, b, c, γ) and unit cell volume of phosphors Ca_0.955-xAl₂Si₂O₈:0.045Eu²⁺, xMn²⁺ decreased linearly, and the lattice parameters (α, β) increased linearly as Mn²⁺ content increased in the phosphors. When Mn²⁺ substitutes for Ca²⁺ the most obvious change is in cell parameter a, the second is c, and the minimum is b. When excited by 357 nm, the Ca_0.955-xAl₂Si₂O₈:0.045Eu²⁺, xMn²⁺ phosphors exhibited two emission peaks centered at 433 and 567 nm, which are ascribed to 5d→4f and ⁴T₁(⁴G)→⁶A₁(⁶S) transition of Eu²⁺ and Mn²⁺, respectively. The results show that the existence of efficient energy transfer between Eu²⁺ and Mn²⁺ in phosphors Ca_0.955-xAl₂Si₂O₈:0.045Eu²⁺, xMn²⁺, the critical distance is calculated to be 0.947 1 nm. The energy transfer between Eu²⁺ and Mn²⁺ was due to the electric dipole-dipole interaction of the resonance transfer. Under the effective excitation of the ultraviolet chip, by changing the amount of Mn²⁺ doping, the color of the emitted light of the phosphors can be gradually shifted from blue light (0.158 2, 0.086) to near white light (0.295 3, 0.298 9). UV-excited single-phase white light-emitting phosphors for white LEDs were available.
- inorganic solid chemistry,
- CaAl₂Si₂O₈:Eu²⁺, Mn²⁺,
- lattice parameters,
- spectral characteristics,
- energy transfer
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Lattice Parameters and Luminescent Property of Single-Phase White Light-Emitting Ca0.955-xAl2Si2O8: 0.045Eu2+, xMn2+ Phosphors

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通讯作者: 陈斌, bchen63@163.com

Lattice Parameters and Luminescent Property of Single-Phase White Light-Emitting Ca_0.955-xAl₂Si₂O₈: 0.045Eu²⁺, xMn²⁺ Phosphors