* Corresponding authors

^a Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241002, P. R. China
E-mail: jyliu@iim.ac.cn

^b Department of Micro/Nano Electronics, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
E-mail: lijinjin@sjtu.edu.cn

^c National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, P. R. China

^d Department of Materials Science and Engineering, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, USA
E-mail: niu@uwm.edu

^e Department of Materials Science and Engineering, Department of Chemistry, Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
E-mail: pbraun@illinois.edu