1. School of Chemical EngineeringNanjing University of Science and Technology Nanjing 210094 P. R. China
2. KAUST Solar Center (KSC)King Abdullah University of Science and Technology (KAUST) Thuwal 23955‐6900 Saudi Arabia
3. MIIT Key Laboratory of Advanced Solid LaserNanjing University of Science and Technology Nanjing 210094 P. R. China