14 Photoenergy Conversion (Dye-Sensitized Solar Cells)
513
Fig. 14.32 Chemical structures of indoline dye sensitizers for ZnO DSSCs
14.3.1 Xanthene Dyes
Xanthene dyes including eosin Y, mercurochrome, fluorescein, Rose Bengal, and
rhodamine 6G, are commercially available at low cost and were utilized as dye
sensitizers in early studies on ZnO DSSCs (Fig. 14.13) (Hara et al. 2000a, b; Yoshida
et al. 2000, 2004; Hosono et al. 2004; Bahadur and Srivastava 2003; Guillén et al.
2008). Particularly, the η values of ZnO DSSCs using eosin Y and mercurochrome
were 2.3% and 2.5% (Hara et al. 2000a, b; Yoshida et al. 2004), respectively, which
are higher than those of the corresponding TiO 2 DSSCs.
14.3.2 Indoline Dyes
Various D–π–A indoline dyes with cyanoacrylic acid or rhodanine-3-acetic acid
groups have been developed as efficient dye sensitizers for ZnO DSSCs (Figs. 14.10,
14.32) (Hosono et al. 2008; Dentani et al. 2009; Matsui et al. 2009, 2010a, b, 2011;
Sakuragi et al. 2010; Guillén et al. 2011; Ambade et al. 2011; Higashijima et al.
2011; Cheng and Hsieh 2010). The ZnO DSSC using the indoline–double rhodanine
dye D205 exhibited an η value of up to 5.34% with a J sc value of 12.17 mA cm
−2 , a
V oc value of 653 mV, and a ff value of 0.67 under AM 1.5 simulated sunlight (100
mW cm
−2 ). The η value is the highest conversion efficiency in ZnO DSSCs using
organic dye sensitizers (Fig. 14.10) (Cheng and Hsieh 2010).
513
Fig. 14.32 Chemical structures of indoline dye sensitizers for ZnO DSSCs
14.3.1 Xanthene Dyes
Xanthene dyes including eosin Y, mercurochrome, fluorescein, Rose Bengal, and
rhodamine 6G, are commercially available at low cost and were utilized as dye
sensitizers in early studies on ZnO DSSCs (Fig. 14.13) (Hara et al. 2000a, b; Yoshida
et al. 2000, 2004; Hosono et al. 2004; Bahadur and Srivastava 2003; Guillén et al.
2008). Particularly, the η values of ZnO DSSCs using eosin Y and mercurochrome
were 2.3% and 2.5% (Hara et al. 2000a, b; Yoshida et al. 2004), respectively, which
are higher than those of the corresponding TiO 2 DSSCs.
14.3.2 Indoline Dyes
Various D–π–A indoline dyes with cyanoacrylic acid or rhodanine-3-acetic acid
groups have been developed as efficient dye sensitizers for ZnO DSSCs (Figs. 14.10,
14.32) (Hosono et al. 2008; Dentani et al. 2009; Matsui et al. 2009, 2010a, b, 2011;
Sakuragi et al. 2010; Guillén et al. 2011; Ambade et al. 2011; Higashijima et al.
2011; Cheng and Hsieh 2010). The ZnO DSSC using the indoline–double rhodanine
dye D205 exhibited an η value of up to 5.34% with a J sc value of 12.17 mA cm
−2 , a
V oc value of 653 mV, and a ff value of 0.67 under AM 1.5 simulated sunlight (100
mW cm
−2 ). The η value is the highest conversion efficiency in ZnO DSSCs using
organic dye sensitizers (Fig. 14.10) (Cheng and Hsieh 2010).