1. State Key Laboratory of Electronic Thin Film and Integrated Devices
2. School of Electronic Science and Engineering, University of Electronic Science and Technology of China
3. Chengdu 610054
4. P. R. China
5. College of Resources and Environment
6. College of Forestry and Landscape Architecture
7. Key Laboratory of Energy Plant Resources and Utilization
8. Ministry of Agriculture
9. Key Laboratory of Biomass Energy of Guangdong Regular Higher Education Institutions
10. South China Agricultural University
11. School of Materials Science and Engineering