白光LED用无稀土掺杂氮化硼基（BN-）氮（氧）化物荧光材料的研究

项目名称： 白光LED用无稀土掺杂氮化硼基（BN-）氮（氧）化物荧光材料的研究

项目编号： No.51502122

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 赵争妍

作者单位： 兰州大学

项目金额： 21万元

中文摘要： 氮（氧）化物作为新发展起来的一种荧光转换材料，凭借丰富的发光颜色、高量子效率、良好的稳定性近年来备受关注。然而，该材料在制备合成中常采用空气中极不稳定的金属氮化物作为原料，不易存放、处理；激活剂集中在 Eu2+ 和 Ce3+ 等稀土离子上，原料资源稀缺，价格昂贵；反应通常需要高温、高压，严格控制氧和水的含量；制备过程复杂、不易实施、对生产设备要求严苛。这些问题极大地制约了氮（氧）化物荧光材料的研究和发展。本项目针对上述缺陷，拟以氮化硼为基础，通过 C、O、Si、S、Al、Zn、Mn等非金属与金属元素的掺杂，制备系列无稀土掺杂多色以及直接白光的氮化硼基（BN-）荧光材料。通过合成方法的探索研究，力求制备颗粒细小均匀、形貌规则、无需后处理的材料样品，发展简单、低能耗、低成本的氮（氧）化物荧光材料制备技术。并通过对系列样品发光机理的研究，积累无稀土掺杂氮（氧）化物荧光材料的发光理论，最终促进白光LED的发展。

中文关键词： 荧光材料；白光；LED；氮化硼；无稀土离子；氮（氧）化物

英文摘要： In recent years, much attention has been paid to (oxy)nitrides, a new developed phosphor, due to its broader range of emitting colors, higher quantum efficiency and better stability. However, the preparation of these (oxy)nitride compounds, are often utilized metal nitrides as nitride starting powder or nitrogen-containing source. The metal nitrides are very sensitive to air and moisture. This leads to the fact that the troubles of storage and treatment increase the weight. Furthermore, the rare earth ions, e.g., Eu2+ and Ce3+, which are required for use as luminescence centers, are scarce and tend to be very expensive. The classical reactions for (oxy)nitride phosphors require high temperatures and pressures. In addition, the concentration of oxygen and moisture must been stringently controlled. The whole synthetic approach is complicated and difficult, and the production instruments demand stringent specification. These problems greatly restricted the research and development of (oxy)nitride phosphors. In this research project, focus on these restrictions, the BN-based phosphors will be synthesized and investigated. RE-free multi-color and direct white light-emitting phosphors will be explored and optimized with the metallic or nonmetallic elements doping, like C, O, Si, S, Al, Zn, Mn, and so on. Furthermore, viable synthetic methods will be developed and improved, for the production of these BN-based (oxy)nitride phosphors with controllable particle shape and size distribution, without post-processing, and at relatively low temperatures under ambient atmospheric pressure. By studying the luminescence mechanism of the samples, more luminescence theory of RE-free (oxy)nitride phosphors will be accumulated. Ultimately we believe it will promote the development of white LED.

英文关键词： phosphor;white LED; boron nitride;Re-free;(oxy)nitrides