Laura Wieland1,2, Han Li1, Christian Rust1,2, Jianhui Chen1,3,* and Benjamin S. Flavel1,*
1 Institute of Nanotechnology, Karlsruhe Institute of Technology, Eggenstein‐Leopoldshafen, 76344 Germany
2 Institute of Materials Science, Technische Universität Darmstadt, Darmstadt, 64289 Germany
3 Hebei Key Lab of Optic‐Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding, 071002 China