1. King Abdullah University of Science and Technology (KAUST)KAUST Solar Center (KSC) Thuwal 23955 Saudi Arabia
2. Department of Polymer Science and EngineeringSchool of Chemistry and Chemical EngineeringShanghai Jiao Tong University Shanghai 200240 P. R. China
3. King Abdullah University of Science and Technology (KAUST) Core Labs Thuwal 23955 Saudi Arabia
4. Department of PhysicsNational Technical University of Athens Athens GR‐15780 Greece