1. Integrated Circuits and Smart System Lab (Shenzhen) Renewable Energy Conversion and Storage Center Tianjin Key Laboratory of Photo‐Electronic Thin Film Device and Technology College of Electronic Information and Optical Engineering Nankai University Tianjin 300071 P. R. China
2. School of Physics Henan Key Laboratory of Photovoltaic Materials Henan Normal University 46# Jianshe Road Xinxiang 453007 P. R. China