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Influence of TiCl_4 treatment on performance of dye-sensitized solar cell assembled with nano-TiO_2 coating deposited by vacuum cold spraying

引用

Rare Metals 2006年第Z1期25卷 163-168页

作者： FAN Shengqiang LI Changjiu YANG Guanjun ZHANG Lingzi State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi''an Jiaotong University Xi''an 710049China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi''an Jiaotong University Xi''an 710049China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi''an Jiaotong University Xi''an 710049China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi''an Jiaotong University Xi''an 710049China

Titanium tetrachloride (TiCl4) treatment was employed to TiO2 coating deposited on fluoride-doped tin oxide (FTO) conducting glass and indium oxide doped tin oxide (ITO) conducting glass, respectively. The nano-crystalline TiO2 coating was deposited using a composite powder composed of polyethylene glycol (PEG) and 25 nm TiO2 particles by vacuum cold spraying (VCS) process. A commercial N-719 dye was used to adsorb on the surface of TiO2 coating to prepare TiO2 electrode, which was applied to assemble dye-sensitized solar cell (DSC). The cell performance was measured under simulated solar light at an intensity of 100 mW·cm-2. Results show that with an FTO substrate the DSC composed of a VCS TiO2 electrode untreated by TiCl4 gives a short-circuit current density of 13.1 mA·cm-2 and an open circuit voltage of 0.60 V corresponding to an overall conversion efficiency of 4.4%. It is found that after TiCl4 treatment to the VCS TiO2 electrode with an FTO substrate, the short circuit current density of the cell increases by 31%, the open-circuit voltage increases by 60 mV and a higher conversion yield of 6.5% was obtained. However, when an ITO substrate is used to deposit TiO2 coating by VCS, after TiCl4 treatment, the conversion efficiency of the assembled cell reduces slightly due to corrosion of the conducting layer on the ITO glass by TiCl4.

关键词： titanium tetrachloride treatment vacuum cold spraying dye-sensitized solar cell nano-crystalline TiO2 coating

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