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In plant photosynthesis, scientists see clues for improving solar energy cells
Date:11/22/2013

Solar cells optimized to suit local light conditions, or made more efficient by using a broader part of the solar spectrum, are among the imaginative applications foreseen from ground-breaking new insights into plant photosynthesis pioneered in Canada.

Indeed new, more fully detailed knowledge of how plants and other living organisms convert sunlight into energy and carbon dioxide into biomass may offer clues to addressing both the global energy crisis and global warming, says Dr. Gregory Scholes, among the world's most renowned scientists in plant photosynthesis.

Dr. Scholes, distinguished professor of Chemistry at the University of Toronto and 2012 recipient of the John C. Polanyi Award from Canada's Natural Sciences and Engineering Research Council (NSERC), will describe his work in a special public lecture Nov. 26 supported by the Royal Canadian Institute (RCI) for the Advancement of Science, NSERC, and Toronto's Ryerson University.

"This new bio-inspired understanding will help scientists devise artificial light gathering systems that can far exceed existing solar cells in functionality, and so pave the way to new, environmentally-friendly energy technologies," says Dr. Scholes.

"We can imagine, for example, solar cells that optimize themselves to suit the local light conditions or that make better use of the solar spectrum by efficiently capturing and processing light of different colours."

Studies of nature's "photosynthetic machines" have involved such organisms as fronds in kelp forests (which can grow 15 cm - 6 inches - in a single day), algae growing 20 meters - 60 feet - underwater even in winter when over 1 metre of ice covers the water - and bacteria from the South Andros Black Hole, Bahamas, which have evolved to short circuit photosynthetic light harvesting and thereby warm their local environment.

All have helped science identify some fascinating chemical physics and determine that a chain of
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Contact: Terry Collins
tc@tca.tc
416-538-8712
Royal Canadian Institute for the Advancement of Science
Source:Eurekalert

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