Empa reaches 20.4% efficiency with flexible CIGS solar PV cell

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On January 17th, 2013 Swiss Federal Laboratories for Materials Science and Technology (Empa, Zürich, Switzerland) announced that it has achieved a world record 20.4% efficiency with a copper indium gallium diselenide (CIGS) solar photovoltaic (PV) cell on a flexible substrate.
The new record was verified by the Fraunhofer Institute for Solar Energy Systems ISE (Freiburg, Germany), and also exceeds the current 20.3% world record for CIGS PV cells.