1. Department
of Chemistry, Center for Macromolecular Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
2. Photovoltaic
Materials Unit, National Institute for Materials Science, Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan
3. School of Chemistry and Biochemistry, School
of Materials Science and Engineering, Center for Organic Photonics
and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332, United States