三维ITO/金属氧化物纳米线分级结构构筑无机－有机杂化太阳能电池及性能研究

项目名称： 三维ITO/金属氧化物纳米线分级结构构筑无机－有机杂化太阳能电池及性能研究

项目编号： No.51202163

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机非金属材料学科

项目作者： 程传伟

作者单位： 同济大学

项目金额： 25万元

中文摘要： 面对国家对清洁、可再生能源需求，发展高效率、低成本光伏器件具有重要的意义。本项目拟通过结合化学气相沉积和液相外延方法制备三维有序ITO/TiO2和ITO/ZnO两种纳米线分级结构阵列，并与聚-3-己基噻吩(P3HT)构筑无机－有机杂化太阳能电池器件；该器件设计具有大的两相接触界面、短的载流子传输路径和直接快速的电子传输通道优势；通过纳米结构优化、半导体量子点敏化，表面/界面调控，以期增强光俘获效率，促进激子分离，降低载流子复合，改善电子收集效率，从而提高能量转换效率；通过一系列光谱表征手段如电化学阻抗谱和超快吸收光谱进一步研究器件光生载流子传输与复合动力学过程及光物理机制，揭示影响器件效率的关键因素和规律，为将来设计和制备高效率、低成本和长寿命高稳定性光伏器件提供理论指导。

中文关键词： 半导体电极；三维分级结构；界面调控；光电化学电池；纳米结构

英文摘要： With respect to the national demand for clean and renewable energy,development of photovoltaic devices with high energy conversion efficiency and low production cost is of great importance.In this project, we propose to prepare three dimensional ITO/TiO2 and ITO/ZnO hierarchical nanowire arrays by a combination of chemical vapor deposition for ITO nanowires and subsequent solution epitaxial growth of TiO2 or ZnO， and then construct inorganic－organic hybrid bulk heterojunction solar cells with regioregular poly(3-hexylthiophene) （P3HT） molecular.This device design are advantageous in providing high contact inferface area，short carrier diffusion length as well as direct plus fast electron transport pathway. By optimizing the nanostructures design, surface sensitization with semiconductor quantum dots, surface/interface control, it is expected to enhance the light harvesting efficiency, promote the exciton separation as well as reduce the carriers recombination loss and increase the electron collection efficiency, as a result in improving the overall energy conversion efficiency; further investigations on the dynamic process of photoinduced charge carriers like transportation and recombination as well as the photophyics mechanism by a series of spectroscopy techniques such as electrochemical impedance spectroscop

英文关键词： Semiconductor electrode；Three-dimension hierarchical structure；Interface modification；Photoelectrochemical cells；Nanosctrutures