1. State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
2. Institute
of Chemistry and Energy Material Innovation, Academy of Fundamental
Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080, China
3. Photovoltaic
and Optoelectronic Devices Group, Departament de Física, Universitat Jaume I, 12071 Castelló, Spain
4. Istituto
CNR di Scienze e Tecnologie Molecolari, c/o Dipartimento di Chimica, Università di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy