TY - JOUR

T1 - Phosphonic acid anchored ruthenium complexes for ZnO-based dye-sensitized solar cells

AU - Neuthe, Katja

AU - Bittner, Florian

AU - Stiemke, Frank

AU - Ziem, Benjamin

AU - Du, Juan

AU - Zellner, Monika

AU - Wark, Michael

AU - Schubert, Thomas

AU - Haag, Rainer

N1 - Funding information: The German Federal Ministry of Education and Research (BMBF) supported this work. Fundings were received within the frame of the program “organic photovoltaics”. Members of the joint research project “scalable dyes sensitized solar cells (FSZ Industrie)” were BGT Bischoff Glastechnik AG, Fraunhofer IAO, Fraunhofer Institute for Solar Energy Systems (ISE), Freie Universität Berlin, IOLITEC Ionic liquids Technologies GmbH, Leibniz Universität Hannover, Merck KGaA, MP&L-Produktions GmbH, Pröll KG, tesa AG, Zürcher Hochschule für Angewandte Wissenschaften.

PY - 2014/5

Y1 - 2014/5

N2 - We report on the development of ruthenium dyes for the application in flexible ZnO based dye-sensitized 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 π-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.

AB - We report on the development of ruthenium dyes for the application in flexible ZnO based dye-sensitized 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 π-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.

KW - Dye sensitized solar cells

KW - Phosphonate anchor

KW - Photovoltaics, Evaluation model

KW - Ruthenium (II) complex

KW - ZnO

UR - http://www.scopus.com/inward/record.url?scp=84892766462&partnerID=8YFLogxK

U2 - 10.1016/j.dyepig.2013.12.018

DO - 10.1016/j.dyepig.2013.12.018

M3 - Article

VL - 104

SP - 24

EP - 33

JO - Dyes and pigments

JF - Dyes and pigments

SN - 0143-7208

ER -