摘要： An efficient back-illuminated dye-sensitized solar cell (DSSC) is made with a flexible Ti-foil based photoanode composed of a composite TiO2 film with TiO2 nanotubes (TNT) and TiO2 nanoparticles (TNP). The composite TiO2 film is fabricated through a novel dipping–rinsing–hydrolysis (DRH) process by inserting TiO2 into TNT and sintering the product to form TNP inside TNT. By directly placing TiO2 nanoparticles into TNT, the former grow internally from the base of TNT to occupy it completely. This solves previous problems of incomplete filling of TNP into TNT, which used partial penetration of TiCl4 reactant from the top of the TNT. In the present case, the TNP are grown from the base of TNT. A DSSC containing TNT and TNP prepared in this way shows a photoelectric efficiency of 6.45%, which is much higher than that (4.21%) of a DSSC with untreated TNT. The films are characterized by using scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis. The improvement in the photoelectric efficiency is explained by using electrochemical impedance spectroscopy (EIS), incident photon-to-current conversion efficiency (IPCE) analysis, and UV-absorption spectra analysis. [Display omitted] •A TiO2 nanotube (TNT)/nanoparticle composite film is made on flexible photoanodes.•TiO2 precursor fills upwards from TNT base using dipping–rinsing–hydrolysis (DRH).•Imperfect filling of TiO2 nanoparticles into TNT by direct top filling is avoided.•Imperfect infiltration of TiCl4 permeating from the top of TNT is solved.•Dye-sensitized solar cells with a composite film show improved efficiency (6.45%). 出版者： Amsterdam: Elsevier B.V 出版日期： 2013-12-01 出處： Journal of power sources, 2013-12, Vol.243, p.535-543 資源來源： Elsevier ScienceDirect 版權： 2013 Elsevier B.V. 版權： 2014 INIST-CNRS 識別號： ISSN: 0378-7753 識別號： EISSN: 1873-2755 識別號： DOI: 10.1016/j.jpowsour.2013.05.163 識別號： CODEN: JPSODZ
