1. College of Materials Science and Engineering & Institute of New Energy and Low‐Carbon Technology Engineering Research Center of Alternative Energy Materials & Devices Ministry of Education Sichuan University Chengdu 610065 P. R. China
2. Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials Engineering University of Macau Avenida da Universidade, Taipa Macau 999078 P. R. China
3. Laboratory for Thin Films and Photovoltaics Empa – Swiss Federal Laboratories for Materials Science and Technology Ueberlandstrasse 129 Duebendorf CH‐8600 Switzerland
4. Guangxi Key Laboratory of Processing for Non‐ferrous Metals and Featured Materials School of Resources, Environment and Materials Guangxi University Nanning 530004 P. R. China
5. Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo New Material Testing and Evaluation Center Co., Ltd Ningbo City 315201 P. R. China
6. School of Optoelectronic Science and Engineering & Collaborative Innovation Center of Suzhou Nano Science and Technology Key Lab of Advanced Optical Manufacturing Technologies of Jiangsu Province & Key Lab of Modern Optical Technologies of Education Ministry of China Soochow University Suzhou 215006 P. R. China