1. State Key Lab of New Ceramic and Fine Processing
2. School of Materials Science and Engineering
3. Tsinghua University
4. Beijing 100084
5. P. R. China
6. Shandong University
7. Jinan 250061
8. Division of Energy & Environment
9. Graduate School at Shenzhen
10. Shenzhen 518055
11. Shenzhen Jiawei Solar Lighting Co., Ltd
12. Shenzhen 518112