新型无机转光材料的设计、制备和性能研究

目前大量使用的碱土硫化物体系农用转光材料存在阳光照射下或潮湿空气中易分解并放出难闻有毒的H2S气体，使用寿命短等诸多缺陷。本项目从结构设计出发，以石榴石、磁铅矿、钙钛矿和尖晶石结构等化合物为基础，根据鲍林规则和电荷补偿原理，采用离子和基团取代以及基质掺杂(掺杂的激活离子包括Eu, Ce等稀土离子和Bi, Mn, Ti等非稀土离子)等方法，构建一类新型高效的在农业领域具有广阔应用前景的发光材料。研究制备方法和实验条件对材料结构和组成的影响，研究结构、组成和发光性能之间的变化关系和内在规律，实现对转光材料激发、发射波长和发光强度的调控，提高转光材料的化学和光热稳定性。本项目的研究和完成，将为新型高效农用转光材料的探寻提供基础和依据，为未来光伏农业的发展做出贡献。

At present, the extensive used alkaline earth sulfides based agricultural light conversion phosphors have a lot of shortcomings, such as easily decomposed and emit unpleasant toxic H2S gas when exposed to sunlight or humid air, short service life, poor stability and so on. The aim of this project is to obtain a new kind of efficient light conversion phosphors that has a broad application prospect in agricultural field. In this project, garnet-, magnetoplubite-, perovskite- and spinel-type compounds will be used as main research systems. And this project will focus on the structural design and modification based on the principle of Pauling's rules, charge compensation rules, the ions replacement, inorganic polyhedrons and groups substitution (doped activators including the rare earth ions Eu, Ce, and non-rare earth ions Bi, Mn, Ti and so on). The effects of different synthesis techniques and experimental proceedings on the material structures and compositions will be discussed. The intrinsic correlations and relations of crystal structure, compositions and luminescence properties of the obtained materials will be investigated. And the controlled tuning of excitation, emission, luminescent intensity, chemical and physical stability of the obtained light conversion phosphors will be researched. The investigations and successful completions of this project will establish fundamental foundation and provide basis for effective light convention phosphors used in agricultural domain, and will further develop the future photovoltaic agricultural domain.