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Dye-sensitised solar cells based on metal complexes with pendant catecholate anchoring groups

基于带有儿茶酚锚定基团的金属配合物的染料敏化太阳能电池

基本信息

批准号：
EP/D078687/1
负责人：
Mike Ward
金额：
$ 11.85万
依托单位：
University of Sheffield
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2006
资助国家：
英国
起止时间：
2006 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FD078687%2F1
关键词：
Dye sensitised solar cells based

项目摘要

Metal complexes which absorb light strongly can be used as the basis of solar cells. By attachment of these metal complexes to the surface of a semiconductor such as titanium dioxide, light can be convertedsto electricity; the energy of the light absorbed by each molecule results in injection of an electron into the semiconductor which results in a current flow.The effectiveness of these depends on several factors, especially (i) how strongly the molecules bind to the TiO2 surface, and (ii) prevention of back electron-transfer, where the injected electron recombines with the dye molecule rather than generating an electric current. This project aims to address both of these areas. We have already shown that metal complexes with a catechol (1,2-dihydroxybenzene) group attached to the periphery attach exceptoinally strongly to the TiO2 surface, and we plan to make additional complexes along these lines to investogate their performance as sensitisers (generators of electric current) in solar cells. The problem of undesired back electron-transfer will be addressed by also attaching amine groups to the periphery of the complexes, which will (quickly) donate an electron to fill the gap left after charge injection, thereby preventing back electron-tramsfer from the TiO2 to the metal complex.We will prepare several new complexes along these lines, carry out a detailed study of their photophysical and electrochemical properties, and then determine how well they perform in prototypical solar cell devices. It is hoped that the new complexes will provide better long-term performance than existing systems because of their very tight binding to the TiO2 surface.

强吸收光的金属络合物可以作为太阳能电池的基础。通过将这些金属络合物附着在二氧化钛等半导体的表面上，光可以转化为电能；每个分子吸收的光的能量导致一个电子注入半导体，从而产生电流。这些电流的有效性取决于几个因素，特别是(I)分子与二氧化钛表面结合的强度，以及(Ii)防止反向电子转移，即注入的电子与染料分子重新结合，而不是产生电流。该项目旨在解决这两个领域的问题。我们已经证明，带有邻苯二酚(1，2-二苯酚)基团的金属络合物与二氧化钛表面的结合非常强烈，我们计划沿着这些线制造更多的络合物，以研究它们在太阳能电池中作为敏化剂(电流发生器)的性能。我们将沿着这些线制备几个新的络合物，对它们的光物理和电化学性质进行详细的研究，然后确定它们在典型的太阳能电池器件中的表现。人们希望新的络合物将提供比现有系统更好的长期性能，因为它们与二氧化钛表面结合非常紧密。