1. Institute of Flexible Electronics (IFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi’an 710072, Shaanxi, China
2. Helmholtz Institute Ulm (HIU), Helmholtzstrasse 11, 89081 Ulm, Germany
3. Karlsruhe Institute of Technology (KIT), P.O. Box
3640, 76021 Karlsruhe, Germany