Time: 16:00-17:00

Place: TPOC-3, Nobel str., Blue Building, 4^th floor, Room 407

Speaker: Charles Belina, Skolkovo Institute of Science and Technology, Center for Electrochemical Energy Storage Title: Relating optoelectronic properties and morphology in materials for organic electronics

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Abstract: Organic semiconductors can replace inorganic materials which are currently being used in many of our everyday optoelectronic devices and devices for energy generation and storage. For this to happen however, scientists must better understand how to control their optoelectronic properties, chief among these being charge-carrier mobility. Since these are semiconductors, their optoelectronic properties are very sensitive to morphology and are currently more difficult to predict than those of their inorganic counterparts. A major step in obtaining a better understanding of charge transport in these materials would be establishing a link between morphology and optoelectronic properties. There are many steps needed to create this chain of association that stretches from synthesis/ deposition method all the way to optoelectronic properties, and my work is entirely concerned with linking device fabrication methods to molecular morphologies. By using molecular dynamics simulations (MD), we have created a phase diagram for the conjugated polymer P3HT [i.e. poly(3-hexylthiophene-2,5-diyl)] within a temperature range from 1 K to 400 K. Upon defining relevant order parameters, we show how P3HT’s morphology, and thus it’s charge-carrier mobility, can be largely controlled by the deposition temperature.

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Speaker: Kirill Kurdin, Skolkovo Institute of Science and Technology, Center for Electrochemical Energy Storage Title: Development of Novel Type Fuel Cells Based on Carbon Monoxide-Tolerant Catalysts

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Abstract: The presence of carbon monoxide (CO) as the most common impurity in the hydrogen stream degrades the performance of polymer electrolyte membrane fuel cells (PEMFC’s). It is well known that one of the greatest obstacles in commercialization of PEMFC’s is the high cost of the electrocatalysts and their susceptibility to impurities. For resolving such problems, molybdenum compounds are promising candidates, because of their inclusion in catalysts reduces high load on platinum (Pt) and high tolerance to CO. Obtaining the Mo compounds and their implementation in MEAs is going to be explained.

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