Substitution effects of Ru-terpyridyl complexes on photovoltaic and carrier transport properties in dye-sensitized solar cells

作者：Numata Youhei; Islam Ashraful; Sodeyama Keitaro; Chen Zhen Hua; Tateyama Yoshitaka; Han Liyuan

来源：Journal of Materials Chemistry A, 2013, 1(36): 11033-11042.

DOI：10.1039/c3ta12152f

Four Ru-4,4'-dicarboxylterpyridyl (dctpy) complexes, substituted with different types of functional groups (H, F, Me, and MeO), were synthesized for dye-sensitized solar cell (DSC) applications, and the influences of the substituents on the dye-adsorption, spectral, electronic, and photovoltaic properties of the Ru-dctpy dyes were observed. UV-vis spectra of the four dyes in MeOH did not exhibit any significant differences as the substituent was changed. However, the UV spectra of dye-sensitized TiO2 films showed differences in absorbance intensities, reflecting the dye-loading amount on the TiO2 surface (Me > H > MeO > F). The photovoltaic properties of the DSCs, based on the four Ru dyes, were changed by the effects of the substituents. The Ru-Me dye exhibited the best conversion efficiency, 7.94%, with the best electron injection efficiency (se). The Ru-F dye, in contrast, exhibited the worst efficiency, 6.29%, due to a short se and rapid charge recombination.

• 出版日期2013