Double-layer porous TiO2 electrodes for solid-state dye-sensitized solar cells

Abstract

Articles you may be interested inHigh-performance dye-sensitized solar cells containing double-layer organized mesoporous TiO2 films sensitized by a dye with a high molar extinction coefficient Efficiency enhancement in dye sensitized solar cells through co-sensitization of TiO2 nanocrystalline electrodes Appl. Phys. Lett. 100, 133303 (2012); 10.1063/1.3697987 Nanocomposites of TiO2 and double-walled carbon nanotubes for improved dye-sensitized solar cells J. Renewable Sustainable Energy 4, 023116 (2012); 10.1063/1.4705117 Dye-sensitized solar cells: Effect of Ar / O 2 gas-flow ratio on the structural and morphological properties of facing-target sputter-deposited TiO 2 electrode

Solid-state dye-sensitized solar cells from polymer-templated TiO2 bilayer thin films

“…18 The I-V curve for the present report shows an increase in J sc from 3.02 to 7.98 mA/cm 2 , but a decrease of V oc from 1.18 to 0.78 V. The increase in current density is likely due to several factors (i) the nanodisk morphology leads to more effective light scattering, thereby enhancing light harvesting and limiting the back transfer of electrons; (ii) the P25 TiO 2 nanoparticles reduce the crystallinity of the PEO electrolyte for a more effective charge transport; 38 (iii) the N3 dye has a stronger absorption ability in the 350 -650 nm region, with absorbance greater than 0.5 in 0.5 mmol/L ethanol solution. The latter two points are also backed up by the current improvement from 4% titanium precursor compared with our previous cells.…”

“…18,23,[26][27][28][29] Caruso's group 27 first reported the use of agarose gels to template high-crystalline macroporous metal oxide monoliths. 28 Our group had independently been employing polymer templates to achieve a variety of titania morphologies including monoliths, 27,28 networks, 29 beads, 16,17 and thin films.…”

“…While most research has focused on the nature of the dye, [9][10][11] electrolyte, and redox couple, [12][13][14] it is becoming evident that the TiO 2 morphology is equally important to determining cell properties. [15][16][17][18] Unlike the highvacuum chemical vapor deposition (CVD) or solvothermal method, 9,19,20 the polymer templating of inorganic materials approach is facile, inexpensive, and not substrate-specific. [21][22][23] There have been several reports where the TiO 2 thin-film anode of DSSCs was prepared by polymer templating.…”

“…28 Our group had independently been employing polymer templates to achieve a variety of titania morphologies including monoliths, 27,28 networks, 29 beads, 16,17 and thin films. 18,23 The advantage of this method is that the resultant morphology can, to some degree, be controlled through the choice of polymer, its concentration, degree of swelling, and (or) cross-linking. Studies on optimizing the swollen polymer templating method for DSSCs, however, are limited.…”

Fabrication of multi-sectional TiO 2 nanotube arrays by anodization

“…The nanostructure properties are largely dependent on the nanostructure morphology. For example, in some fields double-or multi-layered nanostructures offer advantages over nanostructures with uniform longitudinal morphologies [10,22,23].…”