Author(s): SHI Fangxiao, LI Chunzhi, LI Jing, ZHAO Qian, MA Ying, GAO Xu, LI Jinghui, School of Materials Science and Engineering, Shenyang Jianzhu University, Editorial Department of Journal, Shenyang Jianzhu University, Shenyang Jindu NewEnergy Devleopment Co., Ltd.
Pages: 507-515
Year: 2015 Issue:  3
Journal: Journal of Shenyang Jianzhu University(Natural Science)
Keyword:  hydrothermal synthesis; TiO2 film electrode; Zn2+-doped TiO2 film; photoelectric conversion efficiency;
Abstract: This paper studied effects of different hydrothermal synthesis conditions on the perform-ance of dye-sensitized solar cells( DSSC) to improve photoelectric conversion efficiency. Nano-Ti O2 and Zn2 +-doped nano-Ti O2 materials were prepared by hydrothermal synthesis method to making DSSC. Dye adsorption capacity and photo absorption characteristic were analyzed using ultraviolet and visible light( UV-vis) spectroscopy. The photoelectric conversion efficiency was measured using standard solar simulator and source meter. In addition,scanning electron microscope( SEM) was employed to observe surface morphologies of the Ti O2 films. It is found that the photoelectric conversion efficiency of the nano-Ti O2 DSSC that was made by hydrothermal synthesis under condition of 180 ℃ /12 h can greatly reach to 4%. For Zn2 +-doped case,under condition of200 ℃ /12 h the conversion efficiency can have a higher value of 3. 65%. The dye adsorption capacity of Ti O2 film can reach to 2. 51 × 10- 7mol / cm2 under the hydrothermal synthesis condition of 230 ℃ /12 h. Conclusion is that nano-Ti O2 film electrodes that made by the hydrothermal synthesis method have larger special surface areas. The dye adsorption capacity of Ti O2 film under the condition of hydrothermal synthesis at 230 ℃ /12 h is largest. For the case of hydrothermal synthesis at 180 ℃ /12 h,the photoelectric conversion efficiency is highest. But the photovoltaic characteristic cannot be improved by Zn2 +doping.