1. Center for Polymers and Organic Solids, University of California, Santa Barbara, University of California, Santa Barbara, California 93106, United States
2. Mitsubishi Chemical Center for Advanced Materials, Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
3. Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, South Korea
4. Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea