1. Faculty of Science, Engineering and TechnologySwinburne University of TechnologyHawthorn3122VictoriaAustralia
2. Department of Materials Science and EngineeringNorwegian University of Science and TechnologyAlfred Getz vei 2N‐7491TrondheimNorway
3. Department of Materials ScienceMilano‐Bicocca Solar Energy Research CenterUniversity of Milano BicoccaVia Cozzi 53I‐20125MilanoItaly