Dr Xu Liu earned his PhD from the School of Photovoltaic and Renewable Energy Engineering at UNSW in 2018. He previously served as an ACAP Research Fellow and is currently an ARC DECRA Fellow and Lecturer at UNSW. For more than ten years, Dr Liu has focused his research on efficient, stable and low-cost thin-film and tandem solar cells. His work spans a variety of energy materials for solar photovoltaic applications, initially exploring earth-abundant chalcogenide semiconductors before transitioning to inorganic-organic perovskite materials.