1. Semiconductor Photonics Research CenterOSEDDepartment of PhysicsJiujiang Research InstituteXiamen University Xiamen Fujian 361005 China
2. Beijing National Laboratory for Molecular SciencesCAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences Beijing 100190 China
3. School of Materials Science and EngineeringZhengzhou University Zhengzhou 450001 China