| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 80967 | Solar Energy Materials and Solar Cells | 2007 | 5 Pages |
The use of chemical methods to produce coatings with good spectrally selective properties is described. Sol–gel and dipping techniques were combined to fabricate thickness-sensitive solar-selective absorbing coatings based on titanium oxide combined with carbon black (TiO2/CB) and carbon nanotubes (TiO2/CNT) on top of stainless-steel substrates. The low to high reflectance transition (λT) observed in the tandem system based on TiO2/CB films was smooth and red shifted when compared to the sharp transition observed in systems based on mesoporous TiO2/CNT films. Mesoporosity of the oxide was controlled by the use of polymeric surfactants with different molecular weights, causing a significant blue shift in λT as the molecular weight increases. These films were characterized by X-ray diffraction and UV–vis light absorption spectroscopy.
