1. College of Physics
and Electronic Engineering, Henan Normal University, Xinxiang, Henan, 453007, People’s
Republic of China
2. Henan Key Laboratory of Photovoltaic Materials, Xinxiang 453007, People’s
Republic of China
3. College of Physics
and Electrical Engineering, Anyang Normal University, Anyang, Henan, 455000, People’s Republic
of China