1 Key Laboratory of Low-grade Energy Utilization Technologies and Systems (MoE), School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China; Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China.
2 Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China.
3 Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China. Electronic address: xiaoz@nanoctr.cn.
4 Key Laboratory of Low-grade Energy Utilization Technologies and Systems (MoE), School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China.
5 Key Laboratory of Low-grade Energy Utilization Technologies and Systems (MoE), School of Energy and Power Engineering, Chongqing University, Chongqing 400044, China. Electronic address: kuan.sun@cqu.edu.cn.
6 Department of Electrical Engineering, Tsinghua University, Beijing 100084, China.
7 School of Physics and Electronics, Central South University, Changsha 410083, China.
8 School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China.
9 School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China.
10 Solar Energy Research Institute of Singapore, National University of Singapore, Singapore 117574, Singapore. Electronic address: serchy@nus.edu.sg.
11 School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China. Electronic address: qybao@clpm.ecnu.edu.cn.
12 Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing 100190, China. Electronic address: ding@nanoctr.cn.