Ca0.8-2x(YbxTb0.1Na0.1+x)2xWO4近红外下转换荧光粉水热合成及发光性质

引用本文: 廖金生, 苏振裕, 周单, 柳少华, 温和瑞. Ca_0.8-2x(Yb_xTb_0.1Na_0.1+x)_2xWO₄近红外下转换荧光粉水热合成及发光性质[J]. 无机化学学报, 2013, 29(11): 2351-2356. doi: 10.3969/j.issn.1001-4861.2013.00.349 shu

Citation: LIAO Jin-Sheng, SU Zhen-Yu, ZHOU Dan, LIU Shao-Hua, WEN He-Rui. Hydrothermal Method and Luminescent Properties of Ca_0.8-2x(Yb_xTb_0.1Na_0.1+x)_2xWO₄ Near-Infrared Downconversion Phosphor[J]. Chinese Journal of Inorganic Chemistry, 2013, 29(11): 2351-2356. doi: 10.3969/j.issn.1001-4861.2013.00.349 shu

Ca_0.8-2x(Yb_xTb_0.1Na_0.1+x)_2xWO₄近红外下转换荧光粉水热合成及发光性质

基金项目:
国家自然科学基金(No.51162012,21161008) (No.51162012,21161008)

江西省教育厅基金(GJJ12327)资助项目。 (GJJ12327)

摘要: 一种在近红外光谱(NIR)区域高效的量子剪裁现象已在Ca_0.8-2x(Yb_xTb_0.1Na_0.1+x)_2xWO₄(x=0~0.2)荧光粉中得到证实,该量子剪裁通过吸收紫外线光子发射近红外光子,能量传递包括两个协同过程,分别是WO₄^2-基团到Yb³⁺离子和WO₄^2-基团到Tb³⁺离子再到Yb³⁺离子,Yb³⁺离子的掺杂浓度对荧光粉在可见光和近红外光谱的发光,荧光寿命和量子效率的影响已进行了详细的研究。经计算,量子效率最大达到135.7%。铽与镱共掺钨酸钙的近红外量子剪裁,通过吸收太阳光谱的1个紫外光子到2个1000nm光子(2倍光子数增加)的下转化机制实现高效率硅太阳能电池的途径。

关键词:

水热法;下转换;近红外;发光

English

Hydrothermal Method and Luminescent Properties of Ca_0.8-2x(Yb_xTb_0.1Na_0.1+x)_2xWO₄ Near-Infrared Downconversion Phosphor

1.
School of metallurgy and Chemistry Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China
Received Date: 26 March 2013
Fund Project:
国家自然科学基金(No.51162012,21161008)

江西省教育厅基金(GJJ12327)资助项目。

Abstract: An efficient near-infrared (NIR) quantum cutting in Ca0.8-2x(Yb_xTb_0.1Na_0.1+x)_2xWO₄(x=0~20%) phosphors has been demonstrated, which involves the emission of two low-energy NIR photons (around 980 nm) from an absorbed ultra-violet photon via the two cooperative energy transfer processes both from (direct) the WO₄^2- group to Yb³⁺ ions and (indirect) the WO₄^2- group to Tb³⁺ to Yb³⁺ ions. The dependence of Yb³⁺ doping concentration on the visible and NIR emissions, decay lifetime, and quantum efficiencies have been investigated in detail. Yb³⁺ concentration dependent quantum efficiency has been calculated and the maximum quantum efficiency approaches up to 135.7%. The development of the near-infrared quantum cutting tungstates could open a route in achieving high efficiency silicon-based solar cells by means of downconversion in ultra-violet part of the solar spectrum to about 1000 nm photons with a two fold increase in the photon number.

Key words:

hydrothermal method;downconversion;near infrared;luminescence

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

Ca_0.8-2x(Yb_xTb_0.1Na_0.1+x)_2xWO₄近红外下转换荧光粉水热合成及发光性质

English

Hydrothermal Method and Luminescent Properties of Ca_0.8-2x(Yb_xTb_0.1Na_0.1+x)_2xWO₄ Near-Infrared Downconversion Phosphor

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