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293rd MSL Lecture (Prof. Aron Walsh)

Date/Time 2015/07/03 15:00-16:00
Place Lecture Hall, Genso Cube
OrganizerMaterials and Structure Laboratory
ContactProf. Fumiyasu Oba (Ext. 5511)

Subject & Detail

293rd MSL Lecture

Speaker: Prof. Aron Walsh
(Centre for Sustainable Chemical Technologies and Department of Chemistry,University of Bath, UK)

Title: Emerging materials for solar energy: herzenbergite, kesterite, perovskite and beyond

 There are a large variety of materials being developed for application in solar cells. The majority are based upon naturally occurring minerals (so-called solar mineralogy). The general procedure has been to take a multi-component system and tune the chemical composition to optimise optical absorption for the terrestrial solar spectrum. Other factors also determine whether a material can be practically employed in a photovoltaic or photoelectrochemical system, for example, the absolute band energies (work functions), defect physics, and chemical stability. I will discuss our recent progress into computing these performance descriptors from materials simulations [1-5], including advances in structure-property relationships in the kesterite (e.g. Cu2ZnSnS4) and perovskite (e.g. CsSnI3 and CH3NH3PbI3) families, in addition to the herzenbergite (SnS) system. New directions in the field, including the development of novel photoferroic materials, will also be addressed.

[1] “Kesterite Thin-Film Solar Cells: Advances in Materials Modelling of Cu2ZnSnS4” Advanced Energy Materials 2, 400 (2013)
[2] “Band alignment in SnS thin-film solar cells: Origin of the low conversion efficiency” Applied Physics Letters 102, 132111 (2013)
[3] “Atomistic origins of high-performance in hybrid halide perovskite solar cells” Nano Letters 14, 2584 (2014)
[4] “The dynamics of methylammonium ions in hybrid organic–inorganic perovskite solar cells” Nature Communications 6, 7124 (2015)
[5] “Ferroelectric materials for solar energy conversion: photoferroics revisited” Energy & Environmental Science 8, 838 (2015)






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