1. IEK‐5 Photovoltaik Forschungszentrum Jülich GmbH 52428 Jülich Germany
2. Jülich Aachen Research Alliance (JARA‐Energy) and Faculty of Electrical Engineering and Information Technology RWTH Aachen University 52062 Aachen Germany
3. LONGi Central R&D Institute Longi Green Energy Technology Co., Ltd. Xi'an 710018 China