3M shows photovoltaic film for windows

October 7, 2011 by Nancy Owano report

(PhysOrg.com) -- 3M drew press and viewer interest earlier this week at CEATEC with its show of special film that the company has developed to coat ordinary, existing windows and convert them into solar panels. The product was shown on curved and regular glass surfaces. This “windows-transformative” film is to debut next year. Not only does the panel generate energy in sunlight, but it also serves as a heat-blocking layer.

The film is made from an organic photovoltaic material and fits on windows easily to generate power and cut heat.

What is interesting about 3M's technology is its versatility. Claims are that it can generate power, behave as a coolant (absorbing over 90 percent of infrared light) and also protect windows from shattering.

The film's narrow, translucent green strips have gaps between them and are glued to windows in large patches.

Unlike solar paneling, the films are easy to install. An average person can install the films with no outside assistance, according to a senior manager, Yasuhiro Aoyagi.

While the 3M film for windows appears to be an easy answer to complex and costly solar panel alternatives, the 3M product is not as effective as solar paneling.

The film generates only 20 percent of the energy of a regular panel. A factoid frequently included in the reports from Tokyo about the 3M product has been that a square meter of the film can generate roughly enough electricity to charge an iPhone under peak sunlight.

No pricing details were available but expectations are that the film will be half to two-thirds the cost of .

When the film for does hit the Japan market next year, the 3M target user base will be government structures, commercial buildings, and fast-food restaurants.

3M is no stranger to state-of-the-art development efforts in film. The company snagged the world's first patent for window films in 1966. 3M has recognized expertise in both adhesives and multi-layer optical .

Earlier this year, 3M was awarded $4.4 million from the U.S. Department of Energy (DOE). The award, according to the company press release, was made under an initiative to reduce the total costs of photovoltaic solar energy systems by about 75 percent, so that they are cost-competitive with other forms of energy without subsidies.

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4.5 / 5 (2) Oct 07, 2011
I was just wondering if anybody's working on transparent PV.....3M, of course...

Why does this coating have to be constrained to a window treatment ? Can it be applied to existing PV systems ?
What about on your car, or house ?

Why not incorporate graphene, with it's newly discovered thermoelectric properties ?


An irregular surface would benefit from PV technology that responds to light gradients, right ?
5 / 5 (1) Oct 07, 2011
Maybe it's just me, but it seems that things are heading in the direction of being " super-meta materials ". What happens when a material can be something like piezoelectric, transparent, PV, able to emit or absorb energy across a wide portion of the EM spectrum, etc, all at the same time ?

I mean imagine clothes that take light and heat, use that to internally regulate the interior temperature of the cloth , warming or cooling the wearer, at the same time harvesting energy from the person's movements, and photovoltaic/thermoelectric to boot.

Bye-bye thick winter coats and clothes, this could be thinner than saran wrap.

etc, etc. Exciting times to be alive.
2.5 / 5 (2) Oct 07, 2011
On sale in Japan. America need not apply.
not rated yet Nov 07, 2011
This organic PV material converts the infrarred part of the spectrum. That's nice during hot weather, but what happens in the winter, when one wants the infrarred light to enter through the window and warm the room?

A design that allows a fast removal (total or partial, some kind of curtain) would be probably better than a fixed one.

Therefore, what about a textile (woven) material for curtains that includes 3M organic PVs?

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