1. Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials Guangdong-Hong Kong Joint Laboratory of Quantum Matter Guangdong Engineering Technology Research Center of Efficient Green Energy and Environment Protection Materials School of Physics and Telecommunication Engineering South China Normal University Guangzhou 510006 P. R. China
2. Shenzhen BTR New Energy Materials Inc. Shenzhen 518000 P. R. China
3. Guangdong Lingguang New Material Co. Ltd Zhaoqing 526108 P. R. China