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Prof. Kevin Sivula, Ecole Polytechnique Federale de Lausanne- Solution-processed Semiconductor Thin Film Photoelectrodes for Solar Fuel Production

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Date: 1 February 2017   Time: 15:00 - 16:00

Prof. Kevin Sivula
Ecole Polytechnique Federale de Lausanne

Title: Solution-processed Semiconductor Thin Film Photoelectrodes for Solar Fuel Production

Abstract
High-efficiency direct solar-to-fuel energy conversion can be achieved using a photoelectrochemical (PEC) device consisting of an n-type photoanode in tandem with a p-type photocathode. However, the development of robust and inexpensive photoelectrodes are needed to make PEC devices economically viable. In this presentation our laboratory’s progress in the development new materials for economically-prepared, high performance photoelectrodes will be discussed along with the application toward overall PEC water splitting tandem cells for hydrogen production. Specifically, this talk will focus on the application of ternary oxide CuFeO2 and the layered (2D) transition metal dichalcogenide, WSe2, as solution-processed photoelectrodes. In both cases the effect of surface recombination and catalysis is discussed with respect to charge carrier transport in the semiconductor. The strategy of surface state passivation is presented as a tool to overcome the limitations of defect-rich solution processed semiconductors.

Location:  People's Palace - PP1