A review of methods for the preparation thin layers of titanium oxide for using in dye-sensitized solar cells

In two decades، the third generation solar cells in other words، dye-sensitized solar cells or Geratzel cells to silicon cells due to lower production costs and relatively high efficiency of conversion of light to electricity is highly regarded. One of the most important sections of dye-sensitized solar cells is titanium dioxide layer coated on FTO، which the role this layer is the recipient of excited electron dye and transfer to FTO substrate. So the preparation and application of this layer have an important role in the performance of dye-sensitized solar cells. Develop and apply methods this layer is divided into two general classes as physical and chemical methods. The physical methods include laser pulses and spattering and the chemical methods include chemical vapor، sol-gel، dip-coating، spin coating، spray pyrolysis coating and electro-coating. The chemical methods are noteworthy for facility of doing، no need for wrapped laboratory equipment and conditions laboratory compared to the physical methods. Among chemical methods، sol-gel method is important over other chemical methods due to possibility of control of thickness and properties of prepared layer with facility and high accuracy. The aim of the present paper is presentation methods the preparation of titanium dioxide thin films for dye-sensitized solar cells.