1. Materials
Department, University of California, Santa Barbara, California 93106, United States
2. Center
for Polymers and Organic Solids, University of California, Santa Barbara, California 93106, United States
3. Max
Planck Research Group for Organic Optoelectronics, Max Planck Institute for Polymer Research, Mainz, Germany
4. Department
of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
5. Department
of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States