Solar cells performance aspects

The other important aspect in dye-sensitized solar cells is water-induced desorption of the sensitizer from the surface. Extensive efforts have been made in our laboratory to overcome this problem by introducing hydrophobic properties in the ligands (48-53). The photocurrent action spectra of these complexes shows broad features covering a large part of visible spectrum and displays a maxima around 550 nm, where the monochromatic IPCE exceeds 80%. The performance of these hydrophobic complexes as charge-transfer photosensitizers in nanocrys-... 

The innovations in materials science boost the development of polymer solar cell. Considering the four aspects mentioned previously, three methods have been developed accordingly (Li, 2012), namely side chain engineering, donor-acceptor (D-A) copolymerization and large fused aromatic ring structure. Some of the representative high performance conjugated polymers are displayed in Fig. 5.2B. 

The other important aspect in dye-sensitized solar cells is water-induced desorption of the sensitizer from the surface. Extensive efforts have been made in our laboratory to overcome this problem by introducing hydrophobic properties in the ligand. The heteroleptic complexes containing hydrophobic ligands of the type [Ru(dcbpy)(mhdbpy)(NCS)2] 1, [Ru(dcbpy)(dtdbpy)(NCS)2] 2 [Ru(dcbpy) (mddbpy)(NCS)2] 3 (dcbpy = 4,4 -dicar-boxy-2,2 -bipyridine, mhdbpy = 4-methyl-4 -hexadecyl-2,2 -bipyridine and dtdbpy = 4,4 -ditridecyl-2,2 -bipyridine, mddbpy = 4-methyl-4 -didodecyl-2,2 bipyridine) have been synthesized (Fig. 6). The photo-current action spectra of these complexes show broad features covering a large part of visible spectrum and displays a maxima around 550 run, where the incident monochromatic IPCE exceeds 80%. The performance of these hydrophobic complexes as CT photosensitizers in nanocrystaUine Ti02-based solar cell shows excellent stabdity toward water-induced desorption [55]. 

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