基金supported by the National Natural Science Foundation of China (21106178)Postdoctoral Science Foundation of China (20110491480)+3 种基金Scientific Research Foundation of Xuzhou, China (XJ11B009)Polysilicon and Photovoltaic Energy Technology of Xuzhou, China (6AT102092)Open Fund of the State Key Laboratory of Advanced Technology for Materials Synthesis and Processing (Wuhan University of Technology) (2012-KF-13)Scientific Research Foundation for Yong Teachers of the China University of Mining and Technology, China (2011QNA21, 2009A026)~~