1. Beijing Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University Beijing 100875 China
2. Laboratory of Theoretical and Computational Nanoscience CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Chinese Academy of Sciences Beijing 100190 China
3. Key Laboratory of Theoretical & Computational Photochemistry of Ministry of Education College of Chemistry Beijing Normal University Beijing 100875 China
4. Center for Optoelectronic Materials and Devices School of Polymer Science and Engineering The University of Southern Mississippi Hattiesburg MS 39406 USA
5. Beijing Graphene Institute Beijing 100094 China