1. School of Science, and School of Chemical Engineering Jiangsu Ocean University Lianyungang 222005 Jiangsu Province P. R. China
2. School of Photovoltaic and Renewable Energy Engineering UNSW Sydney 2052 Australia
3. School of Physics and Astronomy School of Materials Science and Engineering Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education) Shanghai Jiao Tong University Shanghai 200240 P. R. China
4. Jiangsu Institute of Marine Resources Development Lianyungang 222005 Jiangsu Province P. R. China