Welcome to the Energy Blog


  • The Energy Blog is where all topics relating to The Energy Revolution are presented. Increasingly, expensive oil, coal and global warming are causing an energy revolution by requiring fossil fuels to be supplemented by alternative energy sources and by requiring changes in lifestyle. Please contact me with your comments and questions. Further Information about me can be found HERE.

    Jim


  • SUBSCRIBE TO THE ENERGY BLOG BY EMAIL

Google Links

After Gutenberg

Clean Break

The Oil Drum

Statistics

Blog powered by TypePad

« Ethanol Crunch | Main | Widespread Interest Shown in Bid to Host FutureGen Project »

March 28, 2006

TrackBack

TrackBack URL for this entry:
http://www.typepad.com/services/trackback/6a00d83451b5da69e200d834b4150269e2

Listed below are links to weblogs that reference Thin Film and Organic PV Market to Reach $2.3 Billion in 2011:

Comments

What's this stuff made out of, anyway? A while back SciAm Frontiers featured a process that can turn out these thin film PVs by the mile. And apparently unlike silicon-based PVs, even drilling holes in them doesn't ruin them.

How efficient are they? I doubt they're even close to silicon.

Sometimes efficiency can take a backseat to mass production and higher deployment of a product. In this case, if you can sacrifice a little efficiency you can make up for it in cheaper costs and higher coverage. By integrating this material into areas such as roof coverings costs can be further reduced as it will offer itself to an established trade and forgo the double roofing phenomena of having to install standard roofing with a solar aray over the top of it.

Thin films can be a variety of materials. They are still essentially giant homojunction or hetreojunction transistors, just much thinner. Since semiconductors cost so much to zone refine this reduces the materials cost by a large margin.

They could even technically be made out of silicon. However, silicon is what's known as an indirect band-gap material. Short story is that the absorption of light per unit thickness of silicon is much less than Gallium Arsenide or similar direct band-gap materials.

The efficiency of thin films and organic PVs varies wildly. Laboratory thin-films can certainly exceed the efficiency of commercial Si cells (~ 12 %). As brother_bones points out what matters is $/Watt, not efficiency per say.

You have to keep in mind land use when considering $/Watt and efficiency. Land is not free, roof space is not unlimited.

The highest efficiency thin film cells are Copper-Indium-Gallium-Selenium (CIGS)cells. 19.6% efficiency has been achieved in a government laboratory. Daystar has achieved 16% in the lab for its version, but cannot achieve that in production. Commercial cells are in the 12-15% range which is fairly competitive with silicon. Daystar, Miasole, Nanosolar are some of the producers. RoseStreet and others are working, in the lab, on thin films with theoretically much higher, ~ 48%, efficiencies using multijunction cells to absorb the full spectrum of light, as high as the best silicon cells.

Don't forget lifetime.

A $1/Watt cell that lasts 5 years is no go when present panels with 20+ year lifespans are $4/Watt

http://amazngdrx.blogharbor.com/blog/_archives/2005/7/25/1076505.html

Near 40% efficient solar even without using infrared PV cells (another 20%?)and collecting waste heat for use in heating/cooling.

http://www.spectrolab.com/prd/terres/cell-main.htm

This is the way to make kwh costs for solar compete with ANY source, even the low cost leader, wind power.

http://www.worldchanging.com/archives/003127.html

The US Census Bureau estimated 120 million housing units within the US in 2003. That's a lot of roofs. Even if they aren't all in areas suitable for net zero energy buildings they can still add to the grid. I read an article about a man in the 90's that slapped a home grown solar system on his apartment that provided 50% of his power needs, in Seattle. Modern technology would obviously increase the gains over his hippie system.

Nice post! Thanks for given this information.

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

. .




Batteries/Hybrid Vehicles