Discussion in 'Energy' started by Setarcos, Oct 12, 2009.
Does anyone have any real plans or ideas?
Why would we want that? If it were possible would it be worth the financial and environmental costs?
I certainly hope you're being facetious
Not at all.
Oil, natural gas, and coal will be the dominant sources of U.S. energy consumption well into the 21st century.
Sustainable energy independence would require massive cuts in consumption, unprecidented drilling and development of hydrocarbon resources, and trillion dollar investments in technologies and processes that currently have no commercial merit.
Why would we want that?
Not if you develop sources of energy to meet the need
Drilling for what?
Hydrocarbon resources. Is there an echo in here?
For the benefit of the nation, and our descentdents, the best plan would be the elimination of the burning of hydrocarbons over the next decade.
Couldn't we end world hunger and poverty while we're at it? I mean, as long as we're on a roll here.
While this article quotes a 65% target for Qdot technology, our local firm that will produce the Qdots states a more modest 40% for initial solar cells. These would be produced by an ink jet printing process and the active ingrediant would cost about $10 a square meter. A roof on a small house, properly oreinted, say a 1200 square foot home, could produce as much as 300 Kw a day. Since a normal home uses about 24 Kw a day, that would put a couple of hundred Kw per day, at the very time of most use of electricity.
Nanocrystal solar cell - Wikipedia, the free encyclopedia
While previous methods of quantum dot creation relied on expensive molecular beam epitaxy processes, fabrication using colloidal synthesis allows for a more cost-effective manufacture. A thin film of nanocrystals is obtained by a process known as “spin-coating”. This involves placing an amount of the quantum dot solution onto a flat substrate, which is then rotated very quickly. The solution spreads out uniformly, and the substrate is spun until the required thickness is achieved.
Quantum dot based photovoltaic cells based around dye-sensitised colloidal TiO2 films were investigated in 1991 and were found to exhibit promising efficiency of converting incident light energy to electrical energy, and were found to be incredibly encouraging due to the low cost of materials in the search for more commercially viable/affordable renewable energy sources. A single-nanocrystal (channel) architecture in which an array of single particles between the electrodes, each separated by ~1 exciton diffusion length, was proposed to improve the device efficiency (figure below) and research on this type of solar cell is being conducted by groups at Stanford, Berkeley and the University of Tokyo.
Although research is still in its infancy and is ongoing, in the future quantum dot based photovoltaics may offer advantages such as mechanical flexibility (quantum dot-polymer composite photovoltaics ) as well as low cost, clean power generation  and an efficiency of 65%..
If that technology comes to fruition it would be absolutely groundbreaking. Here's hoping.
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