[1] Huainan Normal Univ, Dept Phys, Anhui Key Lab Low Temp Cofired Mat, Huainan 232038, Anhui, Peoples R China
[2] Changshu Inst Technol, Sch Chem & Mat Engn, Jiangsu Key Lab Adv Funct Mat, Changshu 215500, Jiangsu, Peoples R China
[3] Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Optoelect Mat Chem & Phys, Fuzhou 350002, Fujian, Peoples R China