光电特性导向的含铋晶态半导体氧化物的可控制备及结构调控

项目名称： 光电特性导向的含铋晶态半导体氧化物的可控制备及结构调控

项目编号： No.91622119

项目类型： 重大研究计划

立项/批准年度： 2017

项目学科： 数理科学和化学

项目作者： 井立强

作者单位： 黑龙江大学

项目金额： 80万元

中文摘要： 本项目以光电特性为功能导向，以含铋[Bi-O]+阳离子为源头，拟发展功能分子调制的相可分离的水热/溶剂热法等实现与其他金属-氧的或卤素等阴离子单元的含铋晶态半导体氧化物的可控制备。改变水/有机相体积比例、反应温度和时间、功能分子种类和用量等，并考虑在结构基元中引入合适的其他阴离子单元等对其基元结构及晶相等进行调控，进而实现从紫外光－可见光－红外光宽频谱范围响应的优异光电特性的调控。试图利用气氛可控的稳态/瞬态表面光电压谱、时间分辨的光致发光谱、X射线吸收精细结构谱和理论模拟术等，深入研究并揭示影响含铋晶态氧化物光电特性的主要结构和环境因素及结构基元与其光电特性的内在关系，进而深入洞察以光电特性为功能导向的可控制备含铋的晶态氧化物的合成方法及结构调控策略。此项目将对发展光电功能基元理论、深化对晶态氧化物光电功能特性及基元本质的认识等具有重要的科学意义，也将进一步丰富晶态无机氧化物的制备科学。

中文关键词： 含铋晶态半导体氧化物；功能导向；可控制备；结构调控；光电特性

英文摘要： In this project, based on the photoelectric characteristic functional orientation, originating from the [Bi-O]+ cations, we aim to develop phase- separation functional molecule turnied hydro-/solvothermal method and other approaches to develop controllable preparation of Bi-based crystalline semiconductor oxides by combining with metal-oxide or halogen anion units. Changes of the volume ratios of water/organic, reactive temperature and time,functional molecule kinds and content and so on are considered, as well as introducing some proper anion units into the unit cells to turn the structure and crystalline phase of Bi-based crystalline semiconductor oxides, then to alter the superior photoelectric characteristic under wide spectral response from ultraviolet to visible to infrared regions. We try to utilize various advanced techniques, such as atmosphere controlled steady-state/transient-state surface photovoltage spectra, time-resolved photoluminescence, extended X-ray absorption fine structure and DFT theoretical simulation, to explore the principal affecting factors, including structure and envrionment of the photoelectric characteristic of Bi-based crystalline semiconductor oxides in depth, and then to reveal the internal relationships between the unit cell and photoelectric characteristic. Through these turning methods, we can deeply insight into the controlled synthetic methods and structure turning strategies for the photoelectric characteristic functional oriented Bi-based crystalline semiconductor oxides. This project is of great significance to develop the photoelectric functional unit theory and to deepen the understanding of the photoelectric function and the primitive essences of crystalline oxides. Moreover, it would further enrich the preparation for crystalline inorganic semiconductor oxides.

英文关键词： Bi-based crystalline semiconductor oxide;functional orientation;controllable preparation ;structure turning ;photoelectric characteristic