1. Functional Thin Films Research Center
2. Shenzhen Institutes of Advanced Technology
3. Chinese Academy of Sciences
4. Shenzhen 518055
5. China
6. Tianjin Key Laboratory of Functional Crystal Materials
7. Institute of Functional Crystals
8. Tianjin University of Technology
9. Tianjin 300384
10. School of Chemistry and EaStChem
11. University of St Andrews
12. St Andrews
13. UK