1. Beijing National Laboratory for Molecular SciencesKey Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences Beijing 100190 China
2. School of Optoelectronic Science and EngineeringUniversity of Electronic Science and Technology of China Chengdu 610054 China
3. Division of NanophotonicsCAS Key Laboratory of Standardization and Measurement for NanotechnologyCAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology Beijing 100190 China
4. Guangzhou China Ray Optoelectronic Materials Co., Ltd. Guangzhou 510663 China
5. School of Materials Science and EngineeringNanyang Technological University Singapore 639798 Singapore
6. Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education and Hunan Provincial Key Laboratory of Low‐Dimensional Structural Physics and DevicesSchool of Physics and ElectronicsHunan University Changsha 410082 China
7. State Key Laboratory of Superlattices and MicrostructuresInstitute of SemiconductorsChinese Academy of Sciences Beijing 100083 China
8. Tianjin Key Laboratory of Molecular Optoelectronic SciencesDepartment of ChemistrySchool of ScienceTianjin University Tianjin 300072 China