1. Department of ChemistryTsinghua University Beijing China
2. Key Laboratory of Organic Optoelectronics and Molecular Engineering of Ministry of Education, Department of ChemistryTsinghua University Beijing China
3. Institute of SemiconductorsChinese Academy of Sciences Beijing China
4. Department of Electronic EngineeringTsinghua University Beijing China
5. Institute of GeologyChinese Academy of Geological Sciences Beijing China