The Inquirer-Home

Quantum dots offer solar cell promise

But you'll have to wait a while
Mon Jul 09 2007, 10:30
SOLAR CELLS that double the efficiency of current silicon technology are a step closer, according to a report on Nikkei.net.

The wire said boffin Yoshitaka Okada from Tsukuba University has created a prototype "quantum dot" cell in a more efficient way.

The professor stacked serial semiconductors - "quantum dots" - each of which is only 10-20 nanometres thin, to create a cell several millimetres square, said Nikkei.net.

The dots are made from an indium arsenide compound and so far deliver seven per cent conversion efficiency, but they're able to create electricity from a light spectrum which includes ultraviolet and infrared. Current cells offer 20 per cent efficiency, with 30 per cent efficiencies touted for the future.

But if you're thinking of painting lashings of quantum dots on your south facing roof, you'll have to wait quite a while. The theoretical higher efficiencies of 63 per cent aren't likely to be available until 2020. µ

L'INQ
Nikkei sub needed

 

Share this:

blog comments powered by Disqus
Advertisement
Subscribe to INQ newsletters

Sign up for INQbot – a weekly roundup of the best from the INQ

Advertisement
INQ Poll

Heartbleed bug discovered in OpenSSL

Have you reacted to Heartbleed?