1. Chemical & Materials Science Center, National Renewable Energy Laboratory, 1617 Cole Boulevard, Golden, Colorado 80401, United States
2. Department of Chemistry, French
Family Science Center, Duke University,
124 Science Drive, Durham, North Carolina 27708, United States
3. Department of Physics and Astronomy,
Wright Center for Photovoltaics Innovation and Commercialization, The University of Toledo, Toledo, Ohio 43606, United
States