Citation: Wan-Jun YU, Xing-Hong GONG, Hao-Ran QIN. Efficient Near-infrared Down-conversion Phosphor of Ce³⁺/Yb³⁺ Co-doped La₃Ga₅SiO₁₄ and Its Spectral Structural Modulation[J]. Chinese Journal of Structural Chemistry, ;2021, 40(9): 1194-1204. doi: 10.14102/j.cnki.0254–5861.2011–3111 shu

Efficient Near-infrared Down-conversion Phosphor of Ce³⁺/Yb³⁺ Co-doped La₃Ga₅SiO₁₄ and Its Spectral Structural Modulation

Wan-Jun YU ^{a, b, c} ,
Xing-Hong GONG ^{b, c} ,
Hao-Ran QIN ^{b, c,,}

a.
College of Chemistry, Fuzhou University, Fuzhou 350116, China
b.
Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
c.
Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou 350108, China

Corresponding author: Hao-Ran QIN, qinhaoran@fjirsm.ac.cn
Received Date: 22 January 2021
Accepted Date: 30 March 2021

Fund Project: the Ministry of Science and Technology of the People's Republic of China 2016YFB0701002Chinese Academy of Sciences KFJ-STS-QYZX-069Chinese Academy of Sciences XDB20000000Natural Science Foundation of Fujian Province 2019J01127

Figures(14)

A series of near-infrared (NIR) down-conversion phosphors of La₃Ga₅SiO₁₄ (LGS): Ce³⁺/Yb³⁺ were synthesized via high-temperature solid-state reaction. Under excitation at 345 nm, the phosphors show strong NIR emission around 978 nm, which matches well with the optimal spectral response of crystalline silicon (c-Si) solar cells. The emission spectra and decay curves were used to demonstrate the energy transfer from Ce³⁺ to Yb³⁺. The energy transfer mechanism was discussed in detail, indicating that the energy transfer from Ce³⁺ to Yb³⁺ is dominated by a single photon process, and the energy transfer efficiency is up to 51%. In addition, La₃Ga_5-zAl_zSiO₁₄ (z = 0, 1, 2, 3): Ce³⁺/Yb³⁺ were also synthesized. The NIR emission intensity of La₃Ga₂Al₃SiO₁₄: 1%Ce³⁺/5%Yb³⁺ is 4.6 times that of LGS: 1%Ce³⁺/5%Yb³⁺, and the thermal relaxation was used to explain this phenomenon. The results show that La₃Ga_5-zAl_zSiO₁₄ (z = 0, 1, 2, 3): 1%Ce³⁺/5%Yb³⁺ phosphors have the potential to increase the conversion efficiency of c-Si solar cells.
- Ce³⁺/Yb³⁺,
- down-conversion,
- phosphor,
- ions substitution,
- solar cells
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Efficient Near-infrared Down-conversion Phosphor of Ce3+/Yb3+ Co-doped La3Ga5SiO14 and Its Spectral Structural Modulation

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Efficient Near-infrared Down-conversion Phosphor of Ce³⁺/Yb³⁺ Co-doped La₃Ga₅SiO₁₄ and Its Spectral Structural Modulation