Effect of the molecular weight of a polyethylene glycol on the photoluminescence spectra of porous TiO2 films for dye-sensitized solar cells

• DOI: 10.1016/j.tsf.2010.12.205
• Publication Date: 2011-01-04T09:10:41Z
• Authors: K. Sakai; Y. Hirashita; T. Aihara; A. Fukuyama; T. Ikari; K. Kukita; S. Furukawa
• Keywords: 01 natural sciences; 7. Clean energy; 0104 chemical sciences

Abstract Dye-sensitized solar cells (DSCs) are expected to be used for future clean energy. In general, when the titania porous electrode in DSCs is made, a polyethylene glycol (PEG) is added to obtain the porous structure. Although the conversion efficiency of the DSC became high when the high molecular weight of PEG was used, its reason was not clear. In the present study, the photoluminescence spectrum of titania films with the different molecular weight of PEG was measured at room temperature, and we discussed the relation between molecular weight and the conversion efficiency of the DSC.