By a News Reporter-Staff News Editor at Biotech Week -- Data detailed on Molecular Engineering have been presented. According to news reporting from Stockholm, Sweden, by NewsRx journalists, research stated, "Three metal-free donor-acceptor-acceptor sensitizers with ionized pyridine and a reference dye were synthesized, and a detailed investigation of the relationship between the dye structure and the photophysical and photoelectrochemical properties and the performance of dye-sensitized solar cells (DSSCs) is described. The ionization of pyridine results in a red shift of the absorption spectrum in comparison to that of the reference dye."
The news correspondents obtained a quote from the research from the School of Chemical Sciences, "This is mainly attributable to the ionization of pyridine increasing the electron-withdrawing ability of the total acceptor part. Incorporation of the strong electron-withdrawing units of pyridinium and cyano acrylic acid gives rise to optimized energy levels, resulting in a large response range of wavelengths. When attached to TiO2 film, the conduction band of TiO2 is negatively shifted to a different extent depending on the dye. This is attributed to the electron recombination rate between the TiO2 film and the electrolyte being efficiently suppressed by the introduction of long alkyl chains and thiophene units."
According to the news reporters, the research concluded: "DSSCs assembled using these dyes show efficiencies as high as 8.8%."
For more information on this research see: Efficient Organic Dye-Sensitized Solar Cells: Molecular Engineering of Donor-Acceptor-Acceptor cationic dyes. Chemsuschem, 2013;6(12):2322-2329. Chemsuschem can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany. (Wiley-Blackwell - www.wiley.com/; Chemsuschem - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1864-564X)
Our news journalists report that additional information may be obtained by contacting M. Cheng, Royal Inst Technol KTH, Sch Chem Sci & Engn, Dept. of Chem, Center Mol Devices, S-10044 Stockholm, Sweden. Additional authors for this research include X.C. Yang, J.H. Zhao, C. Chen, Q. Tan, F.G. Zhang and L.C. Sun (see also Molecular Engineering).
Keywords for this news article include: Sweden, Europe, Stockholm, Nanotechnology, Emerging Technologies, Molecular Engineering
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC