Phosphonic acid anchored ruthenium complexes for ZnO-based dye-sensitized solar cells
摘要:
We report on the development of ruthenium dyes for the application in flexible ZnO based dyesensitized solar cells. The ZnO based solar cells were prepared by electrodeposition using eosin Y as a structure-directing agent. The newly synthesized ruthenium dyes differed in the complexity of the extended pi-donor-system and in their anchor moieties. As alternatives to carboxylic acids as anchor groups, dyes carrying phosphonic acids were studied. Comparison of the dyes contrary to what could be expected showed that the phosphonic acid anchored dyes were not superior to the carboxylic anchored dyes. A surprising second effect was that the dyes with the least sophisticated ligands performed best. Exploring possible reasons we established a simple model that allows pre-evaluation of the applicability of the dyes before testing them in real solar cells. (C) 2013 Elsevier Ltd. All rights reserved.
We report on the development of ruthenium dyes for the application in flexible ZnO based dyesensitized solar cells. The ZnO based solar cells were prepared by electrodeposition using eosin Y as a structure-directing agent. The newly synthesized ruthenium dyes differed in the complexity of the extended pi-donor-system and in their anchor moieties. As alternatives to carboxylic acids as anchor groups, dyes carrying phosphonic acids were studied. Comparison of the dyes contrary to what could be expected showed that the phosphonic acid anchored dyes were not superior to the carboxylic anchored dyes. A surprising second effect was that the dyes with the least sophisticated ligands performed best. Exploring possible reasons we established a simple model that allows pre-evaluation of the applicability of the dyes before testing them in real solar cells. (C) 2013 Elsevier Ltd. All rights reserved.
Quadratic and Cubic Nonlinear Optical Properties of Salts of Diquat-Based Chromophores with Diphenylamino Substituents
作者:Benjamin J. Coe、John Fielden、Simon P. Foxon、Madeleine Helliwell、Bruce S. Brunschwig、Inge Asselberghs、Koen Clays、Joanna Olesiak、Katarzyna Matczyszyn、Marek Samoc
DOI:10.1021/jp106473e
日期:2010.11.18
donor groups are connected to electron-accepting diquaternized 2,2′-bipyridyl (diquat) units. The main aim is to combine large quadratic and cubic nonlinearoptical (NLO) effects in potentially redox-switchable molecules with 2D structures. The chromophores have been characterized as their PF6− salts by using various techniques including electronic absorption spectroscopy and cyclic voltammetry. The