Morphology and cathodoluminescence of Li-doped Gd2O3:Eu3+, a red phosphor operating at low voltages
Morphology and cathodoluminescence of Li-doped Gd2O3:Eu3+, a red phosphor operating at low voltages
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DOI：
10.1063/1.1315341
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发表时间：
2000-09
影响因子：
4
通讯作者：
Jung-Chul Park;H. Moon;Dong-kuk Kim;S. Byeon;Bong‐Chul Kim;K. Suh
中科院分区：
文献类型：
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作者：
Jung-Chul Park;H. Moon;Dong-kuk Kim;S. Byeon;Bong‐Chul Kim;K. Suh
研制了一种具有较高阴极发光亮度的掺锂红色荧光粉Gd2O3：Eu3+。与Gd_2O_3：Eu~(3+)呈不规则的团聚状细小颗粒(平均粒径为0.5μm)不同，Li掺杂的Gd_2O_3：Eu~(3+)晶体的形貌是规则的和伪球形的(平均粒径为≈2μm)。在低电压下(500V-1kV)，Li+离子的掺入可以显著提高Gd2O3的阴极发光效率。其中Gd1.84Li0.08Eu0.08O3型−δ的发光强度最高，其500V的发光亮度比商品Y2O3：Eu3+提高了1.8倍。该荧光粉可以是在低电压下工作的场发射显示器的应用。
A red phosphor, Li-doped Gd2O3:Eu3+ with high cathodoluminescent brightness was developed. In contrast to Gd2O3:Eu3+ which showed an irregular shape of agglomerated fine particles (the mean particle size <0.5 μm), the morphology of Li doped Gd2O3:Eu3+ crystals was quite regular and pseudospherical (the mean particle size ≈2 μm). In particular, the incorporation of Li+ ions into Gd2O3 lattice could induce a remarkable increase of cathodoluminescence efficiency at low voltages (500 V–1 kV). The highest emission intensity was observed with Gd1.84Li0.08Eu0.08O3−δ, whose brightness at 500 V was increased by a factor of 1.8 in comparison with that of commercial Y2O3:Eu3+. This phosphor may be an application to the field emission display operating at low voltages.