1. Beijing Key Laboratory for Optical Materials and Photonic Devices Department of Chemistry Capital Normal University Beijing 100048 China
2. Department of Physics and Center for Optoelectronics and Photonics Paderborn (CeOPP) Universität Paderborn Warburger Strasse 100 33098 Paderborn Germany
3. Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of chemistry Chinese Academy of Sciences Beijing 100190 China