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美国化学会志副主编Thomas E. Mallouk教授来我中心访问
报告题目: Light Harvesting and Water Splitting in Dye-Sensitized Solar Cells
报 告 人: Prof. Thomas E. Mallouk
Evan Pugh Professor of Materials Chemistry and Physics at the Pennnsylvania State University
Associate Editor, Journal of the American Chemical Society
Associate Director, The Penn State MRSEC, The Center for Nanoscale Science
地 点：北京大学化学学院A205学术报告厅
时 间：2014年9月22日 (星期一) 10:00
报告内容摘要：
Future solar energy conversion systems (photovoltaic and solar water splitting cells) must be both efficient and inexpensive in order to be competitive with non-renewable energy sources. A common problem for inexpensive solar cells based on dye-sensitized TiO2, organic polymers, and perovskite halides is their inefficient use of the red part of the solar spectrum. By adding photonic crystal light scattering layers, the spectral response of dye-sensitized TiO2 cells can be extended significantly into the red. Photonic crystals can also be combined with plasmonic scattering structures to trap and concentrate light in thin film solar cells. Other architectures based on selective scattering of visible light can be used to extend the spectral response of solar cells. We have recently fabricated tandem cells from dye-sensitized TiO2, which absorbs well in the visible, and single crystal Si, which is most efficient in the near-IR.
By coupling photosensitizers to nanoparticulate oxygen evolution catalysts, it is possible to make dye-sensitized solar cells that split water with visible light, albeit with low efficiency. The efficiency and stability of these devices can be improved by deliberate nanoscale design to control the rates of photoinduced electron and proton transfer. We have recently developed a kinetic model that successfully reproduces the transient current behavior of these photoelectrochemical cells. This model suggests possible strategies for improving the efficiency of water splitting.
报告人简介:
Thomas E. Mallouk is Evan Pugh Professor of Materials Chemistry and Physics at the Pennnsylvania State University. His research focuses on the synthesis of inorganic materials and their application to solar energy conversion, catalysis and electrocatalysis, nano- and microscale motors, low dimensional physical phenomena, and environmental remediation. He is the author of approximately 350 publications, including a few good ones. He is an Associate Editor of the Journal of the American Chemical Society and Associate Director of the Penn State MRSEC, the Center for Nanoscale Science.
Recent professional activities
1996-present, Associate Editor, Journal of the American Chemical Society
2005-2010, Director, Penn State Center for Nanoscale Science (NSF MRSEC)
2010-present, Associate Director, Penn State Center for Nanoscale Science
2008 Volume Organizer, Materials Research Society Bulletin
2009-2010, Synthesis and Self-Assembly Editor, Nanotechnology
2009 Co-organizer, NSF/NIH Workshop on Empowering a Diverse Workforce: Chemists, Chemical Engineers, and Materials Scientists with Disabilities
2010-present, Director, Penn State Center for Solar Nanomaterials
2011-present, Associate Head, Department of Chemistry, Penn State
2012 Co-chair, Gordon Research Conference on Renewable Energy: Solar Fuels
2013 Committee of Visitors, Chemistry Division, National Science Foundation
2014 Chair, Section on Chemistry, AAAS
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