1. Center for Polymers
and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, California 93106, United States
2. Center for Advanced Soft Electronics, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea
3. Mitsubishi Chemical Center for Advanced Materials, Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
4. Division of Advanced Materials, Korea Research Institute of Chemical Technology (KRICT), Daejeon 34114, Republic of Korea