1. College of Physics University‐Industry Joint Center for Ocean Observation and Broadband Communication State Key Lab Biofibers & Ecotext Qingdao University Qingdao 266071 P. R. China
2. School of Materials Science and Engineering Qingdao University Qingdao 266071 P. R. China
3. MOE Key Laboratory for UV Light‐Emitting Materials and Technology Northeast Normal University Changchun Jilin 130024 P. R. China
4. Faculty of Chemistry Northeast Normal University Changchun Jilin 130024 P. R. China