Key Laboratory of Organic Optoelectronics and Molecular Engineenng of Ministry of Education;
Department of Chemistry;
Tsinghua University;
Beijing 100084;
P.R.China;
Department of Chemistn}and Chemical Engineering;
Ningxia Normal University;
Guyuan 756000;
P.R.China;
Two dimensional; Single crystal; Chemical vapor deposition; Field effect transistor;