Molecular engineering on semiconductor surfaces: design, synthesis and application of new efficient amphiphilic ruthenium photosensitizers for nanocrystalline TiO2 solar cells

Effects of substituents of imidazolium cations on the performance of dye-sensitized TiO2 solar cells

“…Thus, a lower degree of adsorption of solvated Im + is desirable for larger V oc . Im + 5 and Im + 6 with larger charge densities than those of other Im + s are expected to adsorb to a lesser degree on to the positive sites of the TiO 2 surface, which causes larger V oc s for their DSSCs, relative to those of cells with other Im + s. Furthermore, the hexyl chains of Im + 5 and Im + 6 can interact laterally to form an aliphatic network, which can impair the back electron transfer from the conduction band of TiO 2 to the I 3 - [23,24]. Kubo et al have observed that electron recombination life time (s) increases with increase in the alkyl chain length of different Im + I -s in DSSCs [5].…”

Properties of several types of novel counter electrodes for dye-sensitized solar cells

“…Many investigations have focused on the following issues: synthesis of dye molecules [7][8][9][10], theoretical analysis of charge-transport processes [11][12][13], development of quasi-solid state or solid-state electrolytes [14][15][16][17][18][19], fabrication of new style cells [20][21][22][23][24][25], etc. However, only a few studies have been performed on the counter electrode of the DSC [26][27][28].…”

Thin-Film Silicon Solar Cells on Flexible Substrates

“…An example of some progress in the area of organic solar cells is the representation made by Brabec and co-workers on the bulk heterojunction battery with a conversion efficiency of 5% [23]. Major problems when creating organic solar cells and solar cells, used the dyes, is the need to increase the absorption of visible light by layer to increase the sensitivity [22] and photochemical stability of dyes [24]. The most important problem is the durability of the use of organic solar cells [25].…”