CX-100673 Categorical Exclusion Determination

15%-efficiency (Mg,Zn)CdTe solar cells with 1.7 eV bandgap for tandem applications Award Number: DE-EE0007552 CX(s) Applied: A9, B3.6 Solar Energy Technology Office Date: 7/25/2016 Location(s): AZ Office(s): Golden Field Office

Office of NEPA Policy and Compliance

August 17, 2016
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15%-efficiency (Mg,Zn)CdTe solar cells with 1.7 eV bandgap for tandem applications
Award Number: DE-EE0007552
CX(s) Applied: A9, B3.6
Solar Energy Technology Office
Date: 7/25/2016
Location(s): AZ
Office(s): Golden Field Office

The U.S. Department of Energy (DOE) is proposing to provide federal funding to Arizona State University (ASU) to design, fabricate, and test photovoltaic (PV) cells in order to demonstrate a 15%-efficient (Mg,Zn)CdTe PV cell with a bandgap of 1.7–1.9 eV.

Proposed activities would include deposition of thin films to form the contacts and electrodes of the PV cells, fabrication of PV cells, and measurement of power output. Deposition of thin films would be completed by ASU in their Macro Technology Works facility on campus in Tempe, AZ. Fabrication using molecular beam epitaxy, and power output measurement would occur at ASU in their Engineering Research Center on campus in Tempe, AZ. Fabrication using close-space sublimation, and power output measurement would be undertaken by the National Renewable Energy Lab (NREL) at their Science and Technology facility in Golden, CO. The facilities in which this lab work would occur are purpose-built for the type of activities being proposed; therefore, no new or modified permits, construction of new facilities or physical modifications to existing facilities would occur as a result of the proposed project.