Substitution effects of Ru–terpyridyl complexes on photovoltaic and carrier transport properties in dye-sensitized solar cells
作者:Youhei Numata、Ashraful Islam、Keitaro Sodeyama、Zhen-Hua Chen、Yoshitaka Tateyama、Liyuan Han
DOI:10.1039/c3ta12152f
日期:——
Four Ruâ4,4â²-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 Ruâdctpy 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 RuâMe dye exhibited the best conversion efficiency, 7.94%, with the best electron injection efficiency (Ïe). The RuâF dye, in contrast, exhibited the worst efficiency, 6.29%, due to a short Ïe and rapid charge recombination.
四种Ru-4,4'-二羧基三联吡啶(dctpy)配合物,分别被不同类型的官能团(H、F、Me和MeO)取代,被合成用于染料敏化太阳能电池(DSC)应用,并观察到取代基对Ru-dctpy染料的染料吸附、光谱、电子和光伏特性的影响。在MeOH中,四种染料的UV-vis光谱随着取代基的改变没有显示出显著差异。然而,染料敏化的TiO2薄膜的UV光谱显示了吸收强度的差异,反映了TiO2表面上的染料负载量(Me > H > MeO > F)。基于四种Ru染料的DSC的光伏特性受到取代基的影响而改变。Ru-Me染料表现出最佳的转换效率,为7.94%,同时具有最佳的电子注入效率(Ïe)。相比之下,Ru-F染料表现出最差的效率,为6.29%,这是由于短的Ïe和快速的电荷复合。