Green to white tunable light emitting phosphors: Dy3+/Tb3+ in zinc phosphate glasses

被引：45

作者：

Juarez-Batalla, J. ^{[1
]}

Meza-Rocha, A. N. ^{[2
]}

Munoz H, G. ^{[1
]}

Calditio, Ulises ^{[1
]}

机构：

[1] Univ Autonoma Metropolitana Iztapalapa, Dept Fis, POB 55-534, Mexico City 09340, DF, Mexico

[2] Benemerita Univ Autonoma Puebla, Fac Ciencias Fis Matemat, CONACyT, Av San Claudio & Av 18 Sur, Puebla 72570, Pue, Mexico

来源：

OPTICAL MATERIALS | 2017年 / 64卷

关键词：

Photoluminescence; Non-radiative energy transfer; Dy3+; Tb3+; Zinc phosphate glass; White light; ENERGY-TRANSFER; ZN(PO3)(2) GLASS; LUMINESCENCE; DY3+; IONS; TB3+; GENERATION; LASER; CE3+; MECHANISM;

D O I：

10.1016/j.optmat.2016.11.033

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dy3+/Tb3+-doped zinc phosphate glasses of composition in mol.%: 98.0Zn(PO3)(2)-2.0Dy(2)O(3), (100.0-x)Zn(PO3)(2)-xTb(2)O(3) and (98.0 x)Zn(PO3)(2)-2.0Dy(2)O(3)-xTb(2)O(3), x = 0.6, 1.0, 2.0 and 5.0, were prepared by conventional melt quenching technique, and characterized by photoluminescence and decay time spectroscopy. The emission color can be adjusted from neutral white of 42791< (98.0 Zn(PO3)(2)-2.0 Dy2O3 glass) toward the green region by codoping with Tb3+ from 0.6 to 5.0 mol% of Tb2O3 upon Dy3+ excitation at 392 nm. The Tb3+ emissions (D-5(4) -> F-7(6),(5,4,3)) being sensitized by Dy3+ through a non-radiative energy transfer. Dysprosium F-4(9/2) level emissions can also be sensitized through excitation of Tb3+ at 284 nm with an efficiency up to of 80%. Additionally, upon 284 nm excitation dominant D-5(4) -> F-7(5) green emission in detriment of the D-5(3) -> F-7(J) blue one is promoted by a cross relaxation process between Tb3+ and Dy3+ in addition to that among Tb3+ ions. In consequence, the most intense green emission observed in the ZP2Dy5Tb phosphor gives rise to a color purity of 67.8% and chromaticity coordinates (0.29, 0.59) very close to those (0.29, 0.60) of European Broadcasting Union illuminant green. Such cross relaxation processes enhancing the green emission of Tb3+ with ultraviolet excitation might contribute to increment the spectral response of solar photovoltaic cells by down-shifting of the incident solar spectrum. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：33 / 39

页数：7

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