沸石咪唑酯骨架材料改善染料敏化太阳能电池开路电压的研究

项目名称： 沸石咪唑酯骨架材料改善染料敏化太阳能电池开路电压的研究

项目编号： No.21303020

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 李亚峰

作者单位： 福州大学

项目金额： 25万元

中文摘要： 较低的开路电压限制了染料敏化太阳能电池（DSSCs）性能的进一步增强。如何改善DSSCs的开路电压，是一个重要的研究课题。对光阳极进行表面处理，可以提高DSSCs的开路电压。沸石咪唑酯骨架（ZIFs）材料是一种新型的用于光阳极表面处理的无机有机杂化材料，可以显著增强DSSCs的开路电压，但其改善开路电压的机理还缺乏系统的研究。ZIFs的存在对光电子注入的阻力大小、电子的扩散长度、电子寿命、光阳极的能带结构、电荷传输与复合等微观参数的影响还缺乏详尽的阐述。本申请将在前期工作的基础上，对ZIFs材料改善DSSCs开路电压的机理开展系统的研究，通过电化学阻抗谱、强度调制光电流谱、强度调制光电压谱等表征手段及相应的理论模型来揭示ZIFs材料的表面处理对激发电子收集效率、光阳极能带结构、电子寿命、电子传输动力学等因素的影响，阐明其中的关键性机理问题，为提高DSSCs的开路电压提供一种新的思路。

中文关键词： 染料敏化太阳能电池；金属有机框架材料；沸石咪唑酯骨架；界面调控；光电性能

英文摘要： The relatively low open circuit photovoltage of dye-sensitized solar cells (DSSCs) restricts their further progress in effectiveness. Therefore, it has becoming an important topic to enhance this photovoltaic parameter. The surface treatment on photoanodes can greatly increase the open circuit photovoltage. Zeolitic imidazolate frameworks as a novel hybrid inorganic-organic material, can be used to realize this goal. However, the fundamental mechanism is still unkown. How it influence the driving force for electron injection, the electron diffuse length, the electron lifetimes, the band structure of photoanodes, the electron density and so on? Based on previous work, this application is devoted to perform a systemic research on the mechanism for zeolitic imidazolate frameworks induced enhanced open circuit photovoltage of DSSCs to solve these questions. The fundamental mechanisms can be solved by applying electrochemical impedance spectra, intensity modulated photovoltage/photocurrent spectroscopy and so on. We wish this project can give rise to interesting and useful results to academic communities involved in the dye-sensitized solar cell research, and a novel approach is established to improve the photovoltaic property of DSSCs by the utilization of zeolitic imidazolate frameworks.

英文关键词： dye-sensitized solar cells；metal-organic frameworks；zeolitic imidazolate frameworks；interfacial regulation；photovoltaic property