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Somenath Mitra, PhD, is among a group of NJIT researchers working to develop an inexpensive, easy process to produce solar panels.  (Source: New Jersey Institute of Technology)
Scientists say the plastic panels could be cranked out at home with an inkjet printer

Researchers at the New Jersey Institute of Technology (NJIT) claim to have developed an inexpensive solar cell that can be painted or printed on flexible plastic sheets.

In a release prepared by the University, researcher Somenath Mitra, PhD, stated, "Someday homeowners will even be able to print sheets of these solar cells with inexpensive home-based inkjet printers. Consumers can then slap the finished product on a wall, roof or billboard to create their own power stations."  Mitra is a professor and acting chair of NJIT's Department of Chemistry and Environmental Sciences.

Purified silicon, the same core material used for fabricating computer chips, is required for making conventional photovoltaic cells, which convert sunlight into electricity. The material is costly, difficult to handle and manufacture, and as a result, it is also subject to shortages. The NJIT research is focused on replacing purified silicon organic solar cells based on polymers.

Not only would such materials be vastly cheaper than silicon-based PV cells, they would also be significantly easier to use in a variety of ways. "Imagine someday driving in your hybrid car with a solar panel painted on the roof, which is producing electricity to drive the engine. The opportunities are endless," Mitra said.

The solar cell developed at NJIT uses a carbon nanotubes complex, combined with carbon "Buckyballs," or fullerenes. Together, these nanomaterials form snake-like structures using Buckyballs to trap electrons generated by polymers exposed to sunlight. Nanotubes are used to conduct the electrons, creating a flowing current.

Details of the process were described in the article "Fullerene single wall carbon nanotube complex for polymer bulk heterojunction photovoltaic cells," recently published in the Journal of Materials Chemistry by the Royal Society of Chemistry.

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RE: Where can I buy one?
By Hoser McMoose on 7/26/2007 12:05:54 PM , Rating: 2
Note that solar systems (or at least this solar system) is rated for it's performance at 1000W/m^2, 25C. This is basically high-noon sun in mid summer.

The average solar power hitting the ground in the US is more like 175 to 250W/m^2 when you average together day vs. night, summer vs. winter, etc. So even in a good location for solar panels you're 3000W system is really only producing about 750W through a simple calculation, though in reality it's probably more like 500-600W since the drop-off in performance is non-linear and cooler temperatures and wind can lower efficiencies of the panel as well.

600W * 24h * 365 days = 5256kWh

At a typical electricity price of $0.10/kWh that's $526 per year. At that rate it will take over 32 years to pay for itself. Customers in Hawaii though, with some of the better sun conditions of the US and electricity prices up around $0.22/kWh could have this pay off in under 15 years.

RE: Where can I buy one?
By ZmaxDP on 7/26/2007 11:44:21 PM , Rating: 2
Check out the site TomZ posted, I don't agree with their solar design strategy, or their efficiency numbers, but their average energy per square meter calculation is much better than yours, and it is computed regionally, which is the most important factor to guaging whether a solar system is cost-effective in a particular time frame for you.

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