1. University of Toledo; Department of Physics & Astronomy and Wright Center for Photovoltaics Innovation & Commercialization (PVIC); 2801 West Bancroft Street Toledo, OH 43606 USA
2. Old Dominion University; Electrical and Computer Engineering; 231 Kaufman Hall Norfolk, VA 23529 USA
3. University of Illinois; Department of Materials Science and Engineering; 1304 W. Green Street Urbana, IL 61801 USA