Title: Designing Semiconductor Materials for Photo-electrochemical Energy Conversion
Speaker: Lianzhou Wang
Time：28th December 2018, 2:00pm
Location：818 Conference Room, Communication Building
Lianzhou Wang is Professor and Director of Nanomaterials Centre, School of Chemical Engineering, Senior Group Leader of Australian Institute for Bioengineering and Nanotechnology, the University of Queensland. His research focuses on design and development of semiconductor materials for use in renewable energy conversion and integrated storage systems including photocatalysis and photoelectrochemical devices and systems. One of his research achievements has been highlighted as a new world record efficiency in quantum dot solar cell category (Best research cell efficiency chart, Dec 2018, National Renewable Energy Lab). Wang has contributed 13 books/book chapters, >350 journal publications, 13 patents and delivered >100 plenary/keynote/invited presentations. His publications have attracted more than 17,000 citations with a H-index of 70. He has won some prestigious Fellowships/awards including ARC Queen Elizabeth II Fellowship, UQ Research Excellence ward, Scopus Young Researcher Award, ARC Future Fellowship, and is a Fellow of Royal Society of Chemistry.
Semiconducting materials hold the key for efficient photocatalytic and photoelectrochemical water splitting. In this talk, we will give a brief overview of our recent progresses in designing semiconductor metal oxides materials for photoelectrochemical energy conversion including photocatalytic solar fuel generation. In more details, we have been focusing the following a few aspects; 1) band-gap engineering of layered semiconductor compounds including layered titanate, tantalate and niobate-based metal oxide compounds for visible light phtocatalysis, and 2) two-dimensional nanosheets/nanoplates of TiO2, Fe2O3, WO3, BiVO4 as building blocks for new photoelectrode design, and 3) the combination of a high performance photoelectrodes with new generation perovskite solar cells can lead to unassisted solar driven water splitting process with solar-to-hydrogen conversion efficiency of >6.5%.1-6 The resultant material systems exhibited efficient visible light photocatalytic performance and improved power conversion efficiency in solar energy, which underpin important solar-energy conversion applications including solar fuel generation, and low-cost high efficiency solar cells.