1. College of Materials Science and EngineeringShenzhen University Shenzhen 518060 China
2. Department of Electrical and Computer EngineeringNational University of Singapore Kent Ridge Singapore 117583 Singapore
3. Collaborative Innovation Center for Optoelectronic Science and TechnologyInternational Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationCollege of Optoelectronic EngineeringShenzhen University Shenzhen 518060 China