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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Luminescence properties of Ca_(10)K(PO_4)_7:RE~(3+) (RE = Ce, Tb, Dy, Tm and Sm) under vacuum ultraviolet excitation
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Luminescence properties of Ca_(10)K(PO_4)_7:RE~(3+) (RE = Ce, Tb, Dy, Tm and Sm) under vacuum ultraviolet excitation

机译：Ca_（10）K（PO_4）_7：RE〜（3+）（RE = Ce，Tb，Dy，Tm和Sm）在真空紫外激发下的发光特性

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摘要

A series of RE~(3+) (RE = Ce, Tb, Dy, Tm and Sm) activated Ca_(10)K(PO_4)_7 were synthesized by conventional state reaction and their photoluminescence properties under vacuum ultraviolet excitation were investigated. The PO_4~(3-) absorption lies within the range from 125 to 180nm in all the excitation spectra of Ca_(10)K(PO_4)_7:RE~(3+). The first f-d transition of Ce~(3+) is observed at 316 nm, and the Ce~(3+) emission is located at about 350 nm. Both the first spin-allowed and spin-forbidden f-d transitions of Tb~(3+) are situated at 232 and 263 nm, respectively. The emission spectrum of Ca_(10)K(PO_4 )_7:Tb~(3+) exhibits typical Tb~(3+) emissions with the predominant peak at 544 nm. The O~(2-)-Dy~(3+) charge transition band was calculated and identified around 173 nm, the CIE chromaticity coordinates of Dy~(3+) were calculated to be 0.364 and 0.392. The Ca_(10)K(PO_4)_7 :Tm~(3+) demonstrates the strongest excitation at about 182 nm assigned to O~(2-)-Tm~(3+), and gives the predominant emission at 453 nm. The ~4G_(5/2)-~6H_(7/2) transition of Sm~(3+) at 601 nm is the most intensive in the emission spectrum.
机译：通过常规的状态反应合成了一系列的RE〜（3 +）（RE = Ce，Tb，Dy，Tm和Sm）活化的Ca_（10）K（PO_4）_7，并研究了它们在真空紫外激发下的光致发光性能。在Ca_（10）K（PO_4）_7：RE〜（3+）的所有激发光谱中，PO_4〜（3-）的吸收均在125至180nm范围内。 Ce〜（3+）的第一个f-d跃迁在316 nm处观察到，Ce〜（3+）的发射位于约350 nm处。 Tb〜（3+）的第一个自旋允许和自旋禁止的f-d跃迁分别位于232和263 nm。 Ca_（10）K（PO_4）_7：Tb〜（3+）的发射光谱表现出典型的Tb〜（3+）发射，主要峰在544 nm。计算并确定了173nm附近的O〜（2-）-Dy〜（3+）电荷跃迁带，计算得出Dy〜（3+）的CIE色度坐标为0.364和0.392。 Ca_（10）K（PO_4）_7：Tm〜（3+）在分配给O〜（2-）-Tm〜（3+）的约182 nm处表现出最强的激发，并在453 nm处发出主要的发射光。 Sm〜（3+）在601 nm处的〜4G_（5/2）-〜6H_（7/2）跃迁在发射光谱中最密集。

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