Silicate Phosphors from Sol-Gel Prescursors

9900034 Sailor该提案旨在探索一类新的硅酸盐磷光体材料的合成、化学和微物理。磷光体的独特之处在于不需要活化剂金属来获得有效的光致发光。这样的材料可以提供现有磷光体的替代品，现有磷光体含有有毒重金属离子，因此造成显著的环境危害。将被研究的发光硅酸盐根据合成中使用的烷氧基硅烷分为两个不同的类别。第一类是在高温下稳定的“羧基硅酸盐”玻璃。第二类是水溶性的“氨基硅”聚合物，可加工成各种形状，如块，泡沫和纤维。这两类都具有高发光效率。这些材料代表了硅溶胶-凝胶化学的一个新方向，本提案的目的是确定这些材料中发色团的结构、化学和物理性质。用于照明、显示器和特殊应用的高效、环境友好的磷光体的发现以及合成具有感兴趣的光学或电子性质的聚合物有机硅的方法的开发作为潜在技术具有显著的工业兴趣。

9900034SailorThis proposal is aimed at exploring the synthesis, chemistry and photophysics of a new class of silicate phosphor materials. The phosphors are unique in that no activator metals are needed to obtain efficient photoluminescence. Such materials may provide an alternative to existing phosphors that contain toxic heavy metal ions and as such pose a significant environmental hazard. The luminescent silicates that will be studied fall into two distinct classes depending on the alkoxysilane used in the synthesis. The first class are 'carboxysilicate' glasses that are stable at high temperatures. The second class are water-soluble 'aminosilicone' polymers that can be processed into a variety of shapes such as blocks, foams, and fibers. Both classes have high luminescence efficiency. These materials represent a new direction in silicon sol-gel chemistry and the aim of this proposal is to determine the structure, chemistry, and photophysics of the chromophore in these materials.%%%The discovery of efficient, environmentally benign phosphors for lighting, display, and specialty applications and the development of methods to synthesize polymeric silicones with interesting optical or electronic properties are of significant industrial interest as potential technologies.