1. State Key Laboratory of Information Photonics and Optical CommunicationsSchool of ScienceBeijing University of Posts and Telecommunications Beijing 100876 P. R. China
2. Beijing National Laboratory for Molecular SciencesState Key Laboratory for Structural Chemistry of Unstable and Stable SpeciesCollege of Chemistry and Molecular EngineeringPeking University Beijing 100871 P. R. China
3. Institute of Materials for Electronics and Energy Technology (i‐MEET)Department of Materials Science and EngineeringFriedrich‐Alexander‐Universität (FAU) Erlangen‐Nürnberg Martensstraße 7 91058 Erlangen Germany