Tuesday, 14 December 2010 12:06

Flexible Solar Panels Popping up in Cities

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Building vast fields of solar panels is a clean and efficient way to power a community, but the challenge is in the long-distance transmission. Where are you going to find the space to build solar fields in huge cities like New York or Los Angeles? Developers have been chasing the solution in the form of very thin plastic solar cells that can be attached to anything from windows to car roofs, and one tech company took a leap forward to deliver. Konarka Technologies, Inc., already produces thin organic based photovoltaic (OPV) solar cells like the ones seen on backpacks that can charge your cell phone, but those only produce at a low energy level. Konarka's newest inception of OPV solar cells demonstrated a record-breaking 8.3% efficiency. The possibilities are great, although maybe not quite New York City-block huge. At least not right now anyway. San Francisco took the torch and ran with this innovation in 2009, outfitting bus stop shelters with thin OPV solar cells embedded in wavy red "Power Plastic." California sunshine is absorbed during the day and used to power the intercom, LED lighting and wireless routers for the city-wide WiFi that San Franciscans enjoy.
The 8.3% efficiency rating on flexible cells is about half the energy produced from the rigid, silicon-based solar panels, so it won't be lighting up entire cities just yet. Bus shelters are a small step but at least one in the right direction.
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