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

• Published in: Thin solid films Vol. 519; no. 17; pp. 5760 - 5762
• Main Authors: SAKAI, K, HIRASHITA, Y, AIHARA, T, FUKUYAMA, A, IKARI, T, KUKITA, K, FURUKAWA, S
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Amsterdam Elsevier 30.06.2011
• Subjects: Applied sciences; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Conversion; Differential scanning calorimetry; Dyes; Energy; Exact sciences and technology; Molecular weight; Natural energy; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Photoluminescence; Photovoltaic conversion; Physics; Polyethylene glycol; Solar cells; Solar cells. Photoelectrochemical cells; Solar energy; Titanium dioxide; Solar cells; Differential scanning calorimetry; Dye-sensitized solar cells; Organic dye; Porous electrode; Porous materials; Photoluminescence; Polyethylene glycols; Molecular weight; Thin films; Ethylene oxide polymer; Polyethylene glycol; Titania porous electrode; Titanium oxide
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2010.12.205

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.