14 Photoenergy Conversion (Dye-Sensitized Solar Cells)
491
Fig. 14.18 Chemical structures of squaraine dye sensitizers for TiO 2 DSSCs
η value of 5.54% with a J sc value of 13.73 mA cm
−2 , a V oc value of 580 mV, and
a ff value of 0.70. The IPCE value of JK-216 exceeded 55% in a broad spectral
region from 550 to 780 nm and showed a profound dip at 550 nm. The DSSC based
on JK-217 showed an excellent stability under light irradiation at 60 °C for 1000 h.
These dyes successfully suppressed their aggregation and also stabilized long-term
device performances by the incorporation of a nonplanar dimethyl fluoreneaniline
part and an asymmetric squaraine moiety into the structures.
491
Fig. 14.18 Chemical structures of squaraine dye sensitizers for TiO 2 DSSCs
η value of 5.54% with a J sc value of 13.73 mA cm
−2 , a V oc value of 580 mV, and
a ff value of 0.70. The IPCE value of JK-216 exceeded 55% in a broad spectral
region from 550 to 780 nm and showed a profound dip at 550 nm. The DSSC based
on JK-217 showed an excellent stability under light irradiation at 60 °C for 1000 h.
These dyes successfully suppressed their aggregation and also stabilized long-term
device performances by the incorporation of a nonplanar dimethyl fluoreneaniline
part and an asymmetric squaraine moiety into the structures.