A novel red emitting phosphor CaIn2O4:Eu3+, Sm3+ with a broadened near-ultraviolet absorption band for solid-state lighting

A novel red emitting phosphor CaIn2O4:Eu3+, Sm3+ with a broadened near-ultraviolet absorption band for solid-state lighting
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一种新型红色荧光粉 CaIn2O4:Eu3 , Sm3 ,具有展宽的近紫外吸收带,用于固态照明

DOI:
10.1016/j.materresbull.2010.09.038
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发表时间:
2011
影响因子:
5.4
通讯作者:
Sun, Kang
Sun, Kang
中科院分区:
材料科学2区
文献类型:
--
作者:
Yan, Xiaosong;Li, Wanwan;Sun, Kang

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采用固相反应法合成了CaIn 2 O 4:Eu 3+,Sm 3+红色荧光粉。在荧光光谱中观察到Eu 3+的5D 0 → 7 F2跃迁,导致荧光粉的红光发射。发现Sm ~(3+)的掺杂能有效地敏化Eu ~(3+)的发光,并能有效地扩展和增强400- 405 nm波长的近紫外光的吸收,并对Sm ~(3+)向Eu ~(3+)的能量转移进行了讨论。研究了Sm ~(3+)的摩尔浓度对CaIn_2 O_4:Eu ~(3+),Sm ~(3+)发光强度的影响。从室温到425 K测量了温度猝灭效应,在425 K时荧光粉的发光强度约为室温时的85%。此外,还比较了CaIn 2 O 4:Eu 3+,Sm 3+和Y2 O 2 S:Eu 3+的色坐标、发光强度和转换效率。
Red phosphor of CaIn2O4:Eu3+, Sm3+is synthesized by solid state reaction. The5D0→7F2transition of Eu3+is dominantly observed in the photoluminescence spectrum, leading to a red emission of the phosphor. The doped Sm3+is found to be efficient to sensitize the emission of Eu3+and be effective to extend and strengthen the absorption of near-UV light with wavelength of 400–405nm, and the energy transfer from Sm3+to Eu3+occurs and is discussed. The effect of the molar concentration of Sm3+on the emission intensities of the phosphor CaIn2O4:Eu3+, Sm3+is investigated. The temperature quenching effect is also measured from room temperature to 425K, and the emission intensity of the phosphor at 425K shows about 85% of that at room temperature. Furthermore, the chromaticity coordinates, the emission intensities and the conversion efficiencies of CaIn2O4:Eu3+, Sm3+are compared to those of the conventional red phosphor of Y2O2S:Eu3+.
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