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Metastable materials for Optoelectronics

Paul McIntyre

Metastable phases have been a feature of materials technology for centuries, with hardening of steels by martensitic transformation being a conspicuous example that contributed greatly to the development of human civilization.  More recently, there has been increasing interest in metastable phases for a broad range of applications including in opto-electronic devices and heterogeneous catalysts.  This presentation will highlight several examples of metastable phase synthesis and structure control that our group has pursued to achieve unconventional functional properties, including a direct band gap in silicon-compatible, Group IV semiconductor alloy nanostructures and light-driven phase separation for wavelength-tunable photoemission from inorganic halide perovskite alloys.  The importance of multi-modal characterization for probing the kinetics and length scales associated with metastable phase formation and resulting changes in electronic structure are emphasized.   

Speaker: Paul McIntyre, SLAC

Monday, 11/11/19


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SLAC Colloquium Series

2575 Sand Hill Rd, Building 51
Kavli Auditorium
Menlo Park, CA 94025