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Categories
» Green Nanotechnology
» Sustainable Nanotechnology innovations
| Solar energy photovoltaic process using a nanoparticulate porous film |
| Country: |
Australia |
| Link to your website: |
http://www.dyesol.com |
Description:
Artificial photosynthesis is based on the concept of a dye analogous to chlorophyll absorbing light and thus generating electrons which enter the conduction band of a high surface area semiconductor film and further move through an external circuit, thus converting light into "green" power.
This is a two-step photovoltaic process, unlike the one step process of conventional PV.
Dyesol's technology is different to any classical PV
It is a photoelectrochemical cell: charge separation occurs on interface between a wide bandgap semiconductor (e.g. titanium dioxide) and an electrolyte.
It is a nanoparticulate porous film: it is not a dense film as is amorphous silicon, but a nanoparticulate cell: a "light sponge"
It is a Dye-sensitised cell: a dye monolayer chemically absorbed on the semiconductor is the primary absorber of sunlight; free charge carriers are generated by electron injections from a dye molecule, excited by visible radiation.
The basic DSC structure.
In basic realization a Dye Solar Cell comprises a layer of nano-particulate titania (Titanium Dioxide) formed on a transparent electrically conducting substrate and photosensitized by a monolayer of dye. An electrolyte, based on an Iodide - Tri-iodide redox system is placed between the layer of photosensitized titania and a second electrically conducting catalytic substrate. |
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