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In page Timeline of solar cells:
"
- 1993 - The National Renewable Energy Laboratory's (NREL) Solar Energy Research Facility is established.[citation needed]
- 1994 - NREL develops a GaInP/GaAs two-terminal concentrator cell (180 suns) which becomes the first solar cell to exceed 30% conversion efficiency.[citation needed]
- 1996 - The National Center for Photovoltaics is established. Graetzel, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland achieves 11% efficient energy conversion with dye-sensitized cells that use a photoelectrochemical effect.[citation needed]
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