Preparation Of Photoanode And Its Application To Flexible Dye-sensitized Solar Cells

As a new style of solar cell, Dye-sensitized solar cell （DSSC） which has simplefabrication process and low fabrication cost, has become a hot research in recentyears. However, flexible DSSC is more popular, for it is light and well flexible. Inthis paper, The preparation of TiO₂photoanod and its’properties were discussed inorder to exploy the influence of different meatures on flexible DSSC. There are somemajor works are shown as follow:1. The Polyvinyl pyrrolidone （PVP） and P25were dispersed in the mixedsolution of distilled water and anhydrous ethanol. Then the suspension was put intoan autoclave （packing volume <80%） and hydrothermally treated at185oC for12hto form a TiO₂colloid. The TiO₂colloid was coated on the ITO/PEN substrate byusing “doctor blade” technique. The resultant flexible TiO₂film was heated at90oCfor30min in air and treated by UV illumination for60min to decompose residualorganic compounds. Finally, a flexible TiO₂film electrode was obtained and flexibleDSSC was assembled. A flexible DSSC with light-to-electric energy conversionefficiency of3.02%was achieved under irradiation with a simulate solar lightintensity of100mW·cm^-2.2. A stable TiO₂phase was prepared by adding the different concentrationhydrochloric acid （HCl） to mixture of commercial TiO₂（P25）, ethanol, distilled water.A flexible photoanode and dye-sensitized solar cell （DSSC） was fabricated by adoctor-blade technique. The samples were characterized by scanning electronmicroscopy, UV-vis absorption spectra and FT-IR spectroscopy. The mechanicalProperty and the photoelectric properties of the DSSC were measured. Additionally,the right hydrothermal time of the TiO₂phase could also efficiently increase thelight-to-electric conversion efficiencies. Under an optimal condition, a flexible DSSCusing TiO₂film with0.05M（mol/L） HCl achieved a light-to-electric energyconversion efficiency of3.26%under irradiation with a simulate solar light intensityof100mW·cm^-2. 3. Titanium dioxide-double-walled carbon nanotubes （TiO₂-DWCNTs） wasprepared by a conventional sol-gel method. Doping the TiO₂-DWCNTs in TiO₂photoanode, a flexible dye-sensitized solar cell is fabricated. The flexible DSSC with0.5wt.%TiO₂-DWCNTs achieved a light-to-electric energy conversion efficiency of3.89%under a simulate solar light irradiation of100mW·cm^-2.