高排列密度一维半导体氧化物纳米阵列/量子点光阳极材料的可控制备与性能研究

项目名称： 高排列密度一维半导体氧化物纳米阵列/量子点光阳极材料的可控制备与性能研究

项目编号： No.51272010

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： 陈爱华

作者单位： 北京航空航天大学

项目金额： 80万元

中文摘要： 量子点敏化太阳能电池由于具备高理论转换效率和低成本，引起了科学界的广泛关注，光阳极材料的设计与制备是其中的关键课题。目前由于材料合成方法的局限，难以得到高排列密度、小单元尺度的一维半导体氧化物纳米阵列，因此很难增加单位面积敏化剂量子点的负载率和光生电子通路，从而限制了该类太阳能电池光电转换效率的进一步提高。本项目拟采用嵌段共聚物做模板，通过种子法结合溶胶-凝胶技术制备出高排列密度、小单元尺度一维单晶半导体氧化物纳米阵列，并在模板脱除前通过柱状微区中亲水基团对金属离子的强络合性和空间制约效应在纳米棒表面负载高分散半导体量子点，构成高排列密度的量子点敏化太阳能电池光阳极材料。在此基础上，研究该类材料的光电转换效率，探讨纳米阵列的直径、排列密度等参数对性能的影响，为今后该类电池的设计与制备提供技术与理论信息。

中文关键词： 嵌段共聚物；自组装；有序多孔聚合物膜；三维杂化纳米阵列；

英文摘要： Quantum dot sensitized solar cells (QDSSCs)have attracted much attention due to its high energy conversion efficiency and low cost. The important role is the design and fabrication of photoelectrodes. Limited by the synthesis approach, it is still a challenge to obtain semiconductor quantum dot/oxide nanoarrys with high density and small unit size, which makes it is difficult to increase the loading rate of quantum dots and direct electrical pathways for photogenerated electrons. The block copolymer lithography is an effective approach to synthesize dense nanoarrays with the diameter in the range of 5-50 nm in large scale. In this work, we will synthesize semiconductor oxide nanorod arrays with high density and small unit size templated from block copolymer films. Semiconductor quantum dots will be loaded in the presence of block copolymer, which will be fixed on the surface of oxide nanorods due to the complex between the hydrophilic groups and metal particles. Therefore, the sintering of super small particles can be avoided. Then, the photoeletrochemical properties of this material will be studied in detail and the relationship between the diameter, density of nanorods and the properties will be investigated too. Furthermore, the properties of QDSSCs based on this photoelectrodes will be tested and the influe

英文关键词： block copolymers；self-assembly；ordered porous polymer films；3D hybrid nano-arryas；