1. College of Materials Science and EngineeringHunan Province Key Laboratory for Advanced Carbon Materials and Applied TechnologyHunan University Changsha 410082 China
2. Division of Physics and Applied PhysicsSchool of Physical and Mathematical SciencesNanyang Technological University 637371 Singapore
3. International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology (ICL‐2D MOST)Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Optoelectronic EngineeringShenzhen University Shenzhen 518060 China
4. School of Materials Science and EngineeringNanyang Technological University Singapore 639798 Singapore
5. Institute of Chemical Engineering and ScienceA* Star 1 Pesek Road Jurong Island 627833 Singapore
6. Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM)Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM)Nanjing Tech University (Nanjing Tech) 30 South Puzhu Road Nanjing 211816 China
7. College of Materials Science and EngineeringJilin University Changchun 130012 China
8. Department of ChemistryCentre for Advanced 2D Materials (CA2DM) and Graphene Research CentreNational University of Singapore 3 Science Drive 3 117543 Singapore