1. Institute for Clean Energy and Advanced Materials, School of Materials and Energy, Southwest University, Chongqing 400715, PR China
2. Center for Advanced Thin Films and Devices, School of Materials and Energy, Southwest University, Chongqing 400715, PR China
3. College of Materials Science and Engineering, Sichuan University, Chengdu 610064, PR China
4. Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technická
5, Prague 6, 166 28 Prague, Czech Republic
5. Low-dimension Materials and Optoelectronic Devices, International Joint Laboratory of China-Czech Republic, Southwest University, Chongqing 400715, PR China