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Related: About this forumColumbia Chemists Find Key to Manufacturing More Efficient Solar Cells
http://news.columbia.edu/content/Columbia-Chemists-Find-Key-to-Manufacturing-More-Efficient-Solar-Cells[font face=Serif][font size=5]Columbia Chemists Find Key to Manufacturing More Efficient Solar Cells[/font]
September 22, 2016
[font size=3]In a discovery that could have profound implications for future energy policy, Columbia scientists have demonstrated it is possible to manufacture solar cells that are far more efficient than existing silicon energy cells by using a new kind of material, a development that could help reduce fossil fuel consumption.
The team, led by Xiaoyang Zhu, a professor of Chemistry at Columbia University, focused its efforts on a new class of solar cell ingredients known as Hybrid Organic Inorganic Perovskites (HOIPs). Their results, reported in the prestigious journal Science, also explain why these new materials are so much more efficient than traditional solar cellssolving a mystery that will likely prompt scientists and engineers to begin inventing new solar materials with similar properties in the years ahead.
Theorists long ago demonstrated that the maximum efficiency silicon solar cells might ever reach the percentage of energy in sunlight that might be converted to electricity we can useis roughly 33 percent. It takes hundreds of nanoseconds for energized electrons to move from the part of a solar cell that infuses them with the suns energy, to the part of the cell that harvests the energy and converts it into electricity that can ultimately be fed into a power grid. During this migration across the solar cell, the energized electrons quickly dissipate their excess energy. But those calculations assume a specific rate of energy loss. The Columbia team discovered that the rate of energy loss is slowed down by over three-orders of magnitude in HOIPs making it possible for the harvesting of excess electronic energy to increase the efficiency of solar cells.
Were talking about potentially doubling the efficiency of solar cells, says Prakriti P. Joshi, a Ph.D. student in Zhus lab who is a coauthor on the paper. Thats really exciting because it opens up a big, big field in engineering. Adds Zhu, This shows we can push the efficiencies of solar cells much higher than many people thought possible.
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http://dx.doi.org/10.1126/science.aaf9570September 22, 2016
[font size=3]In a discovery that could have profound implications for future energy policy, Columbia scientists have demonstrated it is possible to manufacture solar cells that are far more efficient than existing silicon energy cells by using a new kind of material, a development that could help reduce fossil fuel consumption.
The team, led by Xiaoyang Zhu, a professor of Chemistry at Columbia University, focused its efforts on a new class of solar cell ingredients known as Hybrid Organic Inorganic Perovskites (HOIPs). Their results, reported in the prestigious journal Science, also explain why these new materials are so much more efficient than traditional solar cellssolving a mystery that will likely prompt scientists and engineers to begin inventing new solar materials with similar properties in the years ahead.
Theorists long ago demonstrated that the maximum efficiency silicon solar cells might ever reach the percentage of energy in sunlight that might be converted to electricity we can useis roughly 33 percent. It takes hundreds of nanoseconds for energized electrons to move from the part of a solar cell that infuses them with the suns energy, to the part of the cell that harvests the energy and converts it into electricity that can ultimately be fed into a power grid. During this migration across the solar cell, the energized electrons quickly dissipate their excess energy. But those calculations assume a specific rate of energy loss. The Columbia team discovered that the rate of energy loss is slowed down by over three-orders of magnitude in HOIPs making it possible for the harvesting of excess electronic energy to increase the efficiency of solar cells.
Were talking about potentially doubling the efficiency of solar cells, says Prakriti P. Joshi, a Ph.D. student in Zhus lab who is a coauthor on the paper. Thats really exciting because it opens up a big, big field in engineering. Adds Zhu, This shows we can push the efficiencies of solar cells much higher than many people thought possible.
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Columbia Chemists Find Key to Manufacturing More Efficient Solar Cells (Original Post)
OKIsItJustMe
Sep 2016
OP
Cicada
(4,533 posts)1. Long term solar contracts already beat, oil and coal prices
In many places. With the cost of solar generated electricity constantly falling. Coal, oil, gas will not be able to compete economically in a few years. And this wonderful breakthrough discovered at Columbia University will drive the stake deeper into the heart of dirty deadly energy.
The future is bright.