1. Institute of Photoelectronic Thin Film Devices and Technology Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology Renewable Energy Conversion and Storage Center Solar Energy Conversion Center Nankai University Tianjin 300350 China
2. Laboratory of Photonics and Interfaces Institute of Chemical Sciences and Engineering École Polytechnique Fédérale de Lausanne (EPFL) Lausanne 1015 Switzerland