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Thursday, April 30, 2015
2:00 PM - 3:00 PM
CNLS Conference Room (TA-3, Bldg 1690)

Postdoc Seminar

Ab initio Modeling of Organometallic Halide Perovskites for Photovoltaic Applications

Amanda Neukirch

The need for an affordable, clean, and plentiful source of energy has produced large amounts of research in a variety of solution processed organic and hybrid organic-inorganic solar cells. A relative newcomer to the field of solution processed photovoltaics is the lead halide perovskite solar cell. In the past 5 years, the efficiencies of devices made from this material have increased by a factor of 5 up to 20%. Despite the rapid development of organic-inorganic perovskite solar cells, a thorough understanding of the fundamental photo physical processes driving the high performance of these devices is not well understood. I am using state-of-the-art ab initio computational techniques in order to characterize the properties at the interface of perovskite devices in order to aide in materials design and device engineering. I will present an in-depth analysis of the electronic structure of a mixed-halide perovskite that was able to determine the role Cl in MAPbI3-xClx. From there I will discuss the charge carrier dynamics and photo-physical properties that take place in the solar devices.

Host: Jeffrey D. Hyman