1. State
Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, PR China
2. Hebei
Provincial Key Lab of Optoelectronic Information Materials, College
of Physics Science and Technology, Hebei University, Baoding 071002, PR China
3. Hebei
Key Laboratory of Applied Chemistry, School of Environmental and Chemical
Engineering, Yanshan University, Qinhuangdao 066004, PR China