1. Laboratory of Materials for Renewable Energy (LMER), Institute of Chemical Sciences and Engineering (ISIC), Basic Science Faculty (SB), École Polytechnique Fédérale de Lausanne (EPFL) Valais/Wallis, Energypolis, Sion, Switzerland, Rue de l’Industrie 17, CP 440, CH-1951 Sion, Switzerland
2. EMPA Materials Science and Technology, CH-8600 Dübendorf, Switzerland