1. Key Laboratory of Advanced Photonic and Electronic Materials, School of Electronic Science and Engineering, Nanjing University 1 , Nanjing 210093, China
2. School of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications 2 , Nanjing 210023, China
3. Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Department of Physics, Xiamen University 3 , Xiamen 361005, China
4. Institute of future display technology, Tan Kah Kee Innovation Laboratory 4 , Xiamen 361102, China