A Highly Luminous LiCaPO<sub>4</sub>:Eu<sup>2+</sup>Phosphor Synthesized by a Solution Method Employing a Water-Soluble Phosphate Ester

• 作者: Hideki Kato Makoto Kobayashi Masato Kakihana Minsung Kim
• 来源期刊: 光学与光子学期刊(英文)
• 学科: 化学
• 关键词: Solution Method Stable Phosphate ESTER HOMOGENEITY LiCaPO4:Eu2+
• 年，卷（期）: 2013,（6）
• 页码范围: 13-18
• 页数: 6页
• 分类号: O6

摘要

A LiCaPO4:Eu2+ phosphor with high photoluminescence was synthesized using a polymerizable complex (PC) method employing a water-soluble polyethylene glycol-conjugated phosphate ester (PEG-P). PEG-P could be obtained from a reaction among polyethylene glycol 300, phosphorus pentoxide, and pyrophosphoric acid. The PEG-P prepared was stable in an aqueous condition. A transparent solution and gel were obtained when the PEG-P was used as a source of P during the PC method, whereas the use of H3PO4 caused an undesirable precipitate. The LiCaPO4:Eu2+ obtained via the PC method employing the PEG-P showed higher emission intensity than those synthesized by a solid state reaction method and the PC method employing H3PO4. The high luminescence properties of the sample synthesized using the PEG-P may be attributed to high homogeneity of constituents in the sample.