Enhanced energy transfer in Nd3+/Cr3+co-doped Ca3Ga2Ge3O12phosphors with near-infrared and long-lasting luminescence properties

Huihong Lin; Ting Yu; Gongxun Bai; Ming Kiu Tsang; Qinyuan Zhang; Jianhua Hao

doi:10.1039/c5tc04340a

Enhanced energy transfer in Nd³⁺/Cr³⁺co-doped Ca₃Ga₂Ge₃O₁₂phosphors with near-infrared and long-lasting luminescence properties

Huihong Lin, Ting Yu, Gongxun Bai, Ming Kiu Tsang, Qinyuan Zhang, Jianhua Hao

Research output: Journal article publication › Journal article › Academic research › peer-review

61 Citations (Scopus)

Abstract

The phosphors of Ca3Ga2Ge3O12(CGGG) co-doped with Nd3+and Cr3+ions were synthesized using conventional solid-state reaction techniques. Steady-state and time-resolved near-infrared (NIR) photoluminescence (PL) and long-lasting phosphorescence (LLP) properties are investigated in the Nd3+-doped CGGG samples. An increase in NIR luminescence traps can be realized in Nd3+/Cr3+co-doped samples. Energy transfer from Cr3+to Nd3+with an efficiency of up to 57.5% is evident for Ca3-xNdxGa1.99Cr0.01Ge3O12at x = 0.09. A cross relaxation scheme related to4T2-4A2of Cr3+and4I9/2-4F3/2transitions of Nd3+is discussed. We have presented the luminescence mechanism involving the competing processes of NIR PL and LLP, which is in accordance with our measurements. The results show that the NIR persistent luminescence of CGGG co-doped with Nd3+and Cr3+is more efficient compared to the single Nd3+ion doped CGGG.

Original language	English
Pages (from-to)	3396-3402
Number of pages	7
Journal	Journal of Materials Chemistry C
Volume	4
Issue number	16
DOIs	https://doi.org/10.1039/c5tc04340a
Publication status	Published - 28 Apr 2016

ASJC Scopus subject areas

General Chemistry
Materials Chemistry

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10.1039/c5tc04340a

http://hdl.handle.net/10397/100437

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title = "Enhanced energy transfer in Nd3+/Cr3+co-doped Ca3Ga2Ge3O12phosphors with near-infrared and long-lasting luminescence properties",

abstract = "The phosphors of Ca3Ga2Ge3O12(CGGG) co-doped with Nd3+and Cr3+ions were synthesized using conventional solid-state reaction techniques. Steady-state and time-resolved near-infrared (NIR) photoluminescence (PL) and long-lasting phosphorescence (LLP) properties are investigated in the Nd3+-doped CGGG samples. An increase in NIR luminescence traps can be realized in Nd3+/Cr3+co-doped samples. Energy transfer from Cr3+to Nd3+with an efficiency of up to 57.5% is evident for Ca3-xNdxGa1.99Cr0.01Ge3O12at x = 0.09. A cross relaxation scheme related to4T2-4A2of Cr3+and4I9/2-4F3/2transitions of Nd3+is discussed. We have presented the luminescence mechanism involving the competing processes of NIR PL and LLP, which is in accordance with our measurements. The results show that the NIR persistent luminescence of CGGG co-doped with Nd3+and Cr3+is more efficient compared to the single Nd3+ion doped CGGG.",

author = "Huihong Lin and Ting Yu and Gongxun Bai and Tsang, {Ming Kiu} and Qinyuan Zhang and Jianhua Hao",

year = "2016",

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doi = "10.1039/c5tc04340a",

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T1 - Enhanced energy transfer in Nd3+/Cr3+co-doped Ca3Ga2Ge3O12phosphors with near-infrared and long-lasting luminescence properties

AU - Lin, Huihong

AU - Yu, Ting

AU - Bai, Gongxun

AU - Tsang, Ming Kiu

AU - Zhang, Qinyuan

AU - Hao, Jianhua

PY - 2016/4/28

Y1 - 2016/4/28

N2 - The phosphors of Ca3Ga2Ge3O12(CGGG) co-doped with Nd3+and Cr3+ions were synthesized using conventional solid-state reaction techniques. Steady-state and time-resolved near-infrared (NIR) photoluminescence (PL) and long-lasting phosphorescence (LLP) properties are investigated in the Nd3+-doped CGGG samples. An increase in NIR luminescence traps can be realized in Nd3+/Cr3+co-doped samples. Energy transfer from Cr3+to Nd3+with an efficiency of up to 57.5% is evident for Ca3-xNdxGa1.99Cr0.01Ge3O12at x = 0.09. A cross relaxation scheme related to4T2-4A2of Cr3+and4I9/2-4F3/2transitions of Nd3+is discussed. We have presented the luminescence mechanism involving the competing processes of NIR PL and LLP, which is in accordance with our measurements. The results show that the NIR persistent luminescence of CGGG co-doped with Nd3+and Cr3+is more efficient compared to the single Nd3+ion doped CGGG.

AB - The phosphors of Ca3Ga2Ge3O12(CGGG) co-doped with Nd3+and Cr3+ions were synthesized using conventional solid-state reaction techniques. Steady-state and time-resolved near-infrared (NIR) photoluminescence (PL) and long-lasting phosphorescence (LLP) properties are investigated in the Nd3+-doped CGGG samples. An increase in NIR luminescence traps can be realized in Nd3+/Cr3+co-doped samples. Energy transfer from Cr3+to Nd3+with an efficiency of up to 57.5% is evident for Ca3-xNdxGa1.99Cr0.01Ge3O12at x = 0.09. A cross relaxation scheme related to4T2-4A2of Cr3+and4I9/2-4F3/2transitions of Nd3+is discussed. We have presented the luminescence mechanism involving the competing processes of NIR PL and LLP, which is in accordance with our measurements. The results show that the NIR persistent luminescence of CGGG co-doped with Nd3+and Cr3+is more efficient compared to the single Nd3+ion doped CGGG.

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U2 - 10.1039/c5tc04340a

DO - 10.1039/c5tc04340a

M3 - Journal article

SN - 2050-7534

VL - 4

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EP - 3402

JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

IS - 16

ER -

Enhanced energy transfer in Nd³⁺/Cr³⁺co-doped Ca₃Ga₂Ge₃O₁₂phosphors with near-infrared and long-lasting luminescence properties

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