1. Department of Materials Science and EngineeringShenzhen Key Laboratory of Full Spectral Solar Electricity Generation (FSSEG)Southern University of Science and Technology No. 1088, Xueyuan Rd. Shenzhen 518055 Guangdong China
2. Department of PhysicsThe University of Hong Kong Pokfulam Hong Kong SAR China
3. Ningbo Institute of Material Technology and EngineeringChinese Academy of Sciences Ningbo 315201 Zhejiang China