权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Synthesis of high-bright luminescent materials

高亮度发光材料的合成

基本信息

批准号：
09555275
负责人：
SATO Mineo
金额：
$ 5.5万
依托单位：
NIIGATA UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

The present study has been aimed to obtain fundamental aspects on the design for luminescent materials with a low-dimensional arrangement of emission center. The quenching of EuィイD13+ィエD1 - emission in the layered perovskite compounds SrREィイD22ィエD2AlィイD22ィエD20ィイD27ィエD2, BaREィイD22ィエD2TiィイD23ィエD20ィイD210ィエD2, RETaィイD23ィエD20ィイD29ィエD2 and RbRETaィイD22ィエD20ィイD27ィエD2 (RE = rare earths) with two dimensional arrangement of rare earth ions was investigated. The highest luminescence intensity was observed in both tantalum compounds, RETaィイD23ィエD20ィイD29ィエD2 and RbRETaィイD22ィエD2OィイD27ィエD2. The concentration quenching found in these compounds can be explained by a percolation model with two-dimensional interactions between the neighboring EuィイD13+ィエD1 sites in the host lattice. It is confirmed that the energy transfer between the EuィイD13+ィエD1 ions takes place through the multipole-multipole interaction among the nearest-neighbor sites in the rare earth sublattice.We also investigated the luminescence property of pyroxene type compounds, AVOィイD23ィエD2 (A = Cs, Rb, K), with a one-dimensional VOィイD24ィエD2 chain. These compounds show an efficient green leminescence. We have comprehensively discussed the correlation between their crystal structure and high-brightness. One of the reason for the high luminescence intensity found in these compounds is the low-dimensional arrangement of the emission center in the crystal structure.

本研究的目的是获得具有低维发射中心排列的发光材料设计的基本方面。 EuィイD13+ィエD1的淬灭-层状钙钛矿化合物SrREィイD22ィエD2AlィイD22ィエD20ィイD27ィエD2中的发射， BaREィイD22ィエD2TiィイD23ィエD20ィイD210ィエD2、RETaィイD23ィエD20ィイD29ィエD2 和研究了稀土离子二维排列的RbRETaiiD22ィエD20ィイD27ィエD2（RE=稀土）。在两种钽化合物 RETaiiD23iiD20iiD29iiD2 和 RbRETaiiD22iiD2OiiD27iiD2 中观察到最高的发光强度。这些化合物中发现的浓度猝灭可以通过渗流模型来解释，该模型具有主晶格中相邻 EuiiD13+iiD1 位点之间的二维相互作用。证实EuィイD13+ィエD1离子之间的能量转移是通过稀土亚晶格中最近邻位点之间的多极-多极相互作用发生的。我们还研究了辉石型化合物AVOィイD23ィD2 (A = Cs, Rb, K)的一维发光特性。 VOィイD24ィエD2链条。这些化合物显示出有效的绿色发光。我们全面讨论了它们的晶体结构与高亮度之间的相关性。这些化合物具有高发光强度的原因之一是晶体结构中发射中心的低维排列。