1. Physical Sciences and Engineering Division KAUST Solar Center (KSC) King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia
2. Physical Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia
3. Department of Electrical and Computer Engineering University of Toronto Toronto Ontario M5S 3G4 Canada