[1
]Oak Ridge Institute of Science and Engineering, Oak Ridge, Tennessee 37830, United
States
[2
]Solar Energy Technologies Office, Office of Energy Efficiency and Renewable Energy,
U.S. Department of Energy, Washington, D.C. 20585, United States
[3
]Allegheny Science and Technology, under contract to the U.S. Department
of Energy,
Bridgeport, West Virginia 26330, United States