TiO2/CdE(E=S,Se,Te)异质结的高温高压制备及其光电特性研究

项目名称： TiO2/CdE(E=S,Se,Te)异质结的高温高压制备及其光电特性研究

项目编号： No.51272086

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 付乌有

作者单位： 吉林大学

项目金额： 80万元

中文摘要： 利用太阳能解决能源短缺问题是当前国内外的热点课题，是建立低碳经济的一个重要组成部分。光伏材料是能将光能转换成电能的新能源材料，提高其光电性能和降低成本是目前光伏材料研究领域的关键问题。廉价的TiO2与窄带隙半导体CdE(E=S,Se,Te)复合形成核-壳结构纳米线，由于其独特结构和光电特性而深受关注，但其光电效率仍与理论值有很大的差距。本项目拟采用具有独特优势的高温高压(HPHT)合成技术，进行核-壳结构TiO2/CdE异质结纳米线的制备研究，建立具有自主知识产权的高压条件制备TiO2/CdE核壳结构异质结纳米线的新途径。与光电化学技术结合，对核-壳结构光伏材料体系性能的综合优化，获得高光电性能的材料。揭示高温高压下制备材料的电子结构、晶体结构、微观组织和核与壳材料界面作用等对光伏材料的激子解离、电荷分离和电子输运特性的影响机制和规律，为设计与制备具有性能优良的光伏材料提供科学依据。

中文关键词： 异质结；光电特性；高压；核-壳结构；复合材料

英文摘要： At present, to solve the problem of energy shortage by exploiting the solar energy is a hot topic domesticly and internationally, and it is also an important component to establish a low carbon economy. Photovoltaic materials is the new energy materials that can convert solar to electric energy, the key to the research of photovoltaic materials lies in the improvement of its performence and reduction of the cost. The core-shell nanowires fabricated by compounding the narrow gap semiconductors CdE(E=S, Se,Te) on the cheap TiO2 have attracted much attention due to its unique structure and photoelectric properties. However, there still exists a large gap between the actual photoelectric efficiency and the theoretical efficiency at present. This programe would take the unique advantages of High Pressure and High Temperature (HPHT)synthetic technique and conduct systematic researches on the optimal designed core-shell photovoltaic materials, and try to set up new approach to preparation of TiO2/CdE core-shell heterostructure nanowires in high pressure conditions with independent intellectual property rights. Combined with photoelectrochemistrytechnicques, we would optimize the characteristics of the core-shell photovoltaic materials synthetically and try to gain high photoelectrical performance. We try to reveal the

英文关键词： Heterojunction；Photoelectric properties；High pressure；Core-shell structure；Composite material