1. Center for Organic Photonics and Electronics and School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
2. Center for Organic Photonics and Electronics and School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
3. Renewable and Sustainable Energy Institute (RASEI), University of Colorado Boulder, Boulder, Colorado 80303, United States
4. Department of Chemical and Biological Engineering and Department of Chemistry, University of Colorado Boulder, Boulder, Colorado 80309, United States
5. Chemistry Department, Clark Atlanta University, Atlanta, Georgia 30314, United States