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Highly Efficient Green-Emitting Phosphors Ba2Y5B5O17 with Low Thermal Quenching Due to Fast Energy Transfer from Ce3+ to Tb3+
Xiao, Y.; Z. D. Hao; L. L. Zhang; W. G. Xiao; D. Wu; X. Zhang; G. H. Pan; Y. S. Luo and J. H. Zhang
2017
Source PublicationInorganic Chemistry
Volume56Issue:8
AbstractThis paper demonstrates a highly thermally stable and efficient green-emitting Ba2Y5B5O17:Ce3+, Tb3+ phosphor prepared by high temperature solid-state reaction. The phosphor exhibits a blue emission band of CO3+ and green emission lines of Tb3+ upon Ce3+ excitation in the near-UV spectral region. The effect of Ce3+ to Tb3+ energy transfer on blue to green emission color tuning and on luminescence thermal stability is studied in the it samples codoped with 1% Ce3+ and various concentrations (0-40%) of Tb3+. The green emission of Tb3+ upon Ce3+ excitation at 150 degrees C can keep, on average, 92% of its intensity at room temperature, with the best one showing no intensity decreasing up to 210 degrees C for 30% Tb3+. Meanwhile, Ce3+ emission intensity only keeps 42% on average at 150 degrees C. The high thermal stability of the green emission is attributed to suppression of Ce3+ thermal de-excitation through fast energy transfer to Tb+3, which in the green-emitting excited states is highly thermally stable such that no lifetime shortening is observed with raising temperature to 210 degrees C. The predominant green emission is observed for Tb3+ concentration of at least 10% due to efficient energy transfer with the transfer efficiency approaching 100% for 40% Tb3+. The internal and external quantum yield of the sample with Tb3+ concentration of 20% can be as high as 76% and 55%, respectively. The green phosphor, thus, shows attractive performance for near-UV-based white-light-emitting diodes applications.
Indexed Bysci ; ei
Language英语
Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/59333
Collection中科院长春光机所知识产出
Recommended Citation
GB/T 7714
Xiao, Y.,Z. D. Hao,L. L. Zhang,et al. Highly Efficient Green-Emitting Phosphors Ba2Y5B5O17 with Low Thermal Quenching Due to Fast Energy Transfer from Ce3+ to Tb3+[J]. Inorganic Chemistry,2017,56(8).
APA Xiao, Y..,Z. D. Hao.,L. L. Zhang.,W. G. Xiao.,D. Wu.,...&Y. S. Luo and J. H. Zhang.(2017).Highly Efficient Green-Emitting Phosphors Ba2Y5B5O17 with Low Thermal Quenching Due to Fast Energy Transfer from Ce3+ to Tb3+.Inorganic Chemistry,56(8).
MLA Xiao, Y.,et al."Highly Efficient Green-Emitting Phosphors Ba2Y5B5O17 with Low Thermal Quenching Due to Fast Energy Transfer from Ce3+ to Tb3+".Inorganic Chemistry 56.8(2017).
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