摘要： An improved light-harvesting ruthenium dye with an alkyl bithiophene group, designated as CYC-B1, is employed as the photosensitizer for a zinc oxide (ZnO)-based dye-sensitized solar cell (DSSC). ZnO films with N3 and CYC-B1 dyes exhibit different surface appearances. Interestingly, the ZnO nanocrystal electrode surface with CYC-B1 dye is found to be almost free from Zn super(2+)/dye-agglomerations, usually observed in the case of other commercial ruthenium dyes for such an electrode surface, e.g., N3 dye. Owing to this favorable effect of the CYC-B1 dye, the DSSC with a ZnO film (designated as ZN20) sensitized with this dye exhibited an average efficiency ( eta ) of 4.85 plus or minus 0.03%, which is about 94% higher than the eta of the cell with N3 dye (2.50 plus or minus 0.12%). The enhancements of the cell with CYC-B1 dye are explained by analyzing the electrochemical impedance spectra (EIS) and laser-induced photocurrent transients. Further, polymethylmethacrylate (PMMA) spheres with uniform sizes of ca. 300 nm are synthesized and incorporated to template the ZN20 film (designated as PMMA-ZN20); this PMMA-ZN20 film is used as the scattering layer and it is coated on the underlayer ZN20 film to make the photoanode film (ZN20/PMMA-ZN20) of a DSSC. The thus fabricated DSSC shows an eta of 5.40 plus or minus 0.03%. 出版者： Amsterdam: Elsevier 出版日期： 2014 出處： Journal of power sources, 2014, Vol.246, p.1-9 資源來源： Access articles in the ScienceDirect collection 版權： 2015 INIST-CNRS 識別號： ISSN: 0378-7753 識別號： DOI: 10.1016/j.jpowsour.2013.05.101 識別號： CODEN: JPSODZ
