Several researchers have come a step closer to producing solar fuel using artificial photosynthesis. The Lund University team has successfully tracked the electrons’ rapid transit through a light-converting molecule. The goal of the study is to discover a way to make fuel from water using sunlight, similar to photosynthesis. Researchers around the world are attempting to borrow ideas from photosynthesis in order to find a way to produce solar fuel artificially.
“Our study shows how it is possible to construct a molecule in which the conversion of light to chemical energy happens so fast that no energy is lost as heat. This means that all the energy in the light is stored in a molecule as chemical energy,” said Villy Sundström, professor of Chemical Physics at Lund University.
Today solar energy is harnessed in solar cells and solar thermal collectors. Solar cells convert solar energy to electricity and solar thermal collectors convert solar energy to heat. However, producing solar fuel, for example in the form of hydrogen gas or methanol, requires entirely different technology. The idea is that solar light can be used to extract electrons from water and use them to convert light energy to energy rich molecules, which are the constituent of the solar fuel.
“A device that can do this – a solar fuel cell – is a complicated machine with light-collecting molecules and catalysts,” said Sundström. Continue reading