WANG Yanxiang, GAO Zhidan, ZHAO Xueguo, FAN Xueyun, YANG Zhisheng, HUANG Liqun, LI Jiake, SUN Jian
(Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China)
Abstract: TiO2 and ZnO/TiO2 nanopowders were prepared by hydrothermal method. The ZnO/TiO2 composite photoanodes with different Zn2+/Ti4+ molar ratios were prepared on the transparent conductive fluorine-doped SnO2(FTO) substrates by doctor-blade method. These photoanodes were assembled into dye-sensitized solar cells (DSSCs) together with Pt-counter electrode and liquid electrolyte. XRD and SEM were used to characterize the phase composition and morphology of the synthesized samples. Results showed that the Jsc and Eff of the DSSC based on the pure TiO2 photoanode were 1.77 mA/cm2 and 0.9 %, respectively. The Jsc and Eff of the DSSC fabricated from ZnO/TiO2 powder with the Zn2+/Ti4+ ratio of 1:1 were optimum, which were 2.88 mA/cm2 and 1.26%. The Eff was 40 % higher than that of pure TiO2 based DSSC.
Key words: dye sensitized solar cell; ZnO/TiO2 composite photoanodes; photoelectric properties