1. School of Materials Science & Engineering, Nanyang Technological University, 50 Nanyang Ave, 639798, Singapore
2. Singapore-HUJ Alliance for Research and Enterprise (SHARE), Nanomaterials for Energy and Energy-Water Nexus (NEW), Campus for Research Excellence and Technological Enterprise (CREATE), Singapore, 138602 Singapore
3. Catalonia Institute for Energy Research (IREC), Jardins de les Dones de Negre, 1, 2a pl., 08930 Sant Adrià de Besòs, Barcelona, Spain
4. Laboratory for Photovoltaics, University of Luxembourg, 42, rue du Brill, 4422 Belvaux, Luxembourg