Fluorescence spectra of Eu3+:Ln2O2S (Ln = Y, La, Gd) powder phosphors
Fluorescence spectra of Eu3+:Ln2O2S (Ln = Y, La, Gd) powder phosphors
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DOI：
10.1016/0025-5408(96)00129-8
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发表时间：
1996-11
影响因子：
5.4
通讯作者：
K. Reddy;K. Annapurna;S. Buddhudu
中科院分区：
文献类型：
--
作者：
K. Reddy;K. Annapurna;S. Buddhudu
本文报道了Eu3+掺杂镧系氧硫化物[Y2O2S， La2O2S和Gd2O2S]粉末荧光粉的制备和光致发光光谱分析。这些荧光粉在紫外线照射下显示出明亮的红色。通过从CIE标准图表中确定它们的颜色坐标（X´，Ȳ）来验证红色的丰富度，并且该红色发射被分配到625 nm的跃迁[5D0→7F2]。除了这种较强的发射跃迁外，还观察到四种较弱的荧光跃迁，并确定了这些相对荧光强度比(R)。
This paper reports the preparation and analysis of the photoluminescence spectra of Eu3+-doped lanthanide oxysulfide [Y2O2S, La2O2S, and Gd2O2S]powder phosphors. These phosphors have displayed bright red color under a UV source. The richness of the red color has been verified by determining their color coordinates (X̄, Ȳ) from the CIE standard charts, and this red emission has been assigned to the transition [5D0→7F2]at 625 nm. Besides this stronger emission transition, four weaker fluorescent transitions have been observed, and for these the relative fluorescence intensity ratios (R) have been determined.