1. SZU‐NUS Collaborative Innovation Centre for Optoelectronic Science & Technology, and Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceInternational Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationCollege of Optoelectronic EngineeringShenzhen University Shenzhen 518060 P. R. China
2. Shenzhen Key Laboratory of Flexible Memory Materials and DevicesCollege of Electronic Science and TechnologyShenzhen University Shenzhen 518060 P. R. China
3. Department of Materials Science and EngineeringNorthwestern University Evanston IL 60208 USA
4. Faculty of Information TechnologyMacau University of Science and Technology Macao 519020 P. R. China
5. Shenzhen Institute of Information Technology Shenzhen 518172 P. R. China