1. Key Laboratory of Automobile MaterialsMinistry of EducationCollege of Materials Science and EngineeringElectron Microscopy CenterJilin University Changchun 130012 P. R. China
2. State Key Laboratory of Supramolecular Structure and MaterialsCollege of ChemistryJilin University Changchun 130012 P. R. China
3. Department of Materials Science and Engineeringand Centre for Functional Photonics (CFP)City University of Hong Kong Hong Kong SAR P. R. China
4. State Key Laboratory on Integrated Optoelectronics and College of Electronic Science and EngineeringJilin University Changchun 130012 P. R. China
5. Key Laboratory of Advanced Display and System Applications of Ministry of EducationShanghai University 149 Yanchang Road Shanghai 200072 P. R. China
6. Center of Information Optical TechnologyITMO University 49 Kronverksky Pr. St. Petersburg 197101 Russia