项目名称: 量子点敏化氧化锌基复合材料的制备及快速光响应特性研究
项目编号: No.61307045
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 无线电电子学、电信技术
项目作者: 魏志鹏
作者单位: 长春理工大学
项目金额: 28万元
中文摘要: 针对ZnO基探测器中存在的氧吸附/光解析这一缓慢物理过程对器件快速响应制约的难点问题,本项目拟开展应用于紫外探测器的量子点敏化ZnO/Graphene复合材料及其器件的应用基础研究。本项目中考虑到Graphene电极高迁移率和透光性的充分发挥,ZnO纳米阵列直接生长在Graphene电极上,以此构成肖特基接触型紫外探测器的原型。通过CdS-CdSe核壳量子点对ZnO纳米阵列进行表面钝化,不但可以解决由于氧吸附和光解析的缓慢物理过程对探测器响应速度的限制,充分发挥光生电子-空穴主导作用;而且该钝化层的材料选择上还考虑了结合材料间的能带调制关系,设置空穴势阱,实现光生载流子的快速分离,提高光响应效率,最终获得高速低噪的CdS-CdSe核壳量子点敏化ZnO/Graphene复合材料紫外探测器。
中文关键词: 氧化锌;纳米结构;光电子器件;;
英文摘要: According to the oxygen adsorption and desorption in ZnO surface, which restrict device fast response in the ZnO-based detector. In this project we intends to carry out the basic research of quantum dot sensitized ZnO/Graphene composite materials and UV detector. ZnO nanoarray surface was passivated by CdS - CdSe core-shell quantum dots , it not only give full play to the leading role of photogenerated electron-hole but also solve the detector response speed limit from the oxygen adsorption and the slow physical processes of light analytical. The passivation layer of material selection also be considered through the band modulation relationship between the composite materials. Finally, we set up hole trap to achieve fast separation of photogenerated carriers and improve the light response efficiency to enforce high speed low noise of CdS - CdSe core-shell quantum dot sensitized ZnO/Graphene composites UV detector.
英文关键词: ZnO;nanostructure;optoelectronic device;;