August 25, 2008
Copper-based solar cells made
Mix copper, indium, gallium and selenium
in a solution of the industrial chemical and rocket fuel hydrazine
and you have an inexpensive way to make thin-film solar cells that,
in the laboratory, post power conversion efficiencies of 10 percent.
Copper indium gallium selenium (CIGS) thin-film solar cells
can be made on flexible surfaces and have the potential to be less
expensive than traditional silicon solar cells. Though CIGS solar
cells with efficiencies approaching 20 percent have been made, the
hydrazine solution processing method is much simpler than previous
methods and could significantly lower manufacturing costs.
The hydrazine process was first developed to make flexible
electronic devices, including transistors and light-emitting diodes.
High-Efficiency Solution-Deposited Thin-Film Photovoltaic Device
Advanced Materials, published online on August 20, 2008
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