Author/Authors :
Chen، نويسنده , , Xiuying and Guo، نويسنده , , Jiahao and Peng، نويسنده , , Xiaojun and Guo، نويسنده , , Min and Xu، نويسنده , , Yongqian and Shi، نويسنده , , Lei and Liang، نويسنده , , Chunli and Wang، نويسنده , , Li and Gao، نويسنده , , Yunling and Sun، نويسنده , , Shiguo and Cai، نويسنده , , Shengmin، نويسنده ,
Abstract :
Novel cyanine dyes (Sqb and Cyb3) with carboxylbenzyl group and different methine chains as solar cell sensitizers were synthesized and the photoelectrochemical behaviors of the TiO2 nanocrystalline electrode sensitized by them were investigated. The results show that Isc (2.76 mA/cm2), monochromatic incident photon-to-current conversion efficiency (IPCE) (46%) and η (1.7%) of TiO2 nanocrystalline solar cell sensitized by Sqb were higher than that of TiO2 nanocrystalline solar cell sensitized by Cyb3 when TiO2 nanostructured porous film was 6.5 μm thick and was sensitized for 6 h and 4 h, respectively. The excited state level of these dyes matches the conductive band edge of TiO2 nanoparticles. Therefore, the sensitization of the dyes can increase the photocurrent density of TiO2 nanocrystalline electrode.
Keywords :
cyanine dye , TiO2 nanocrystalline electrode , Photoelectric conversion , dye-sensitized solar cell , Squarylium dye
