1. School of Chemistry and Chemical Engineering Anyang Normal University Anyang Henan Province 455002 P. R. China
2. International Joint Laboratory of Henan Photoelectric Functional Materials Anyang Henan Province 455002 P. R. China
3. Department of Physics and Institute of Basic Science Sungkyunkwan University 2066, Seobu‐ro, Jangan‐gu Suwon Gyeonggi‐do 16419 Republic of Korea
4. Henan Province Key Laboratory of New Opto‐electronic Functional Materials Anyang Henan Province 455002 P. R. China