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Yoon's Research Group investigates the local electrical and optical properties of micro/nano structured materials at the length scales of relevant physical processes. Based on knowledge of the fundamental physics, we develop exploratory devices in electronics, photonics, and chemical and biomedical devices.


Our current research focuses on the development of in-situ, local measurement techniques using electron beams and light sources. The versatile multi-probe approaches will elucidate structure-property relationship of micro/nanomaterials and devices in photovoltaics, nanoelectronics, and bio-engineered systems.


Research Topics

Solar Energy Harvesting

  Radial Junction Pillar Array Solar Cells : Sunlight is an abundant renewable energy source, providing 10,000 times more energy than the world’s current total energy use. A key metric in photovoltaics (PV) is power conversion efficiency, the ratio of

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Multi-probe Microscopy

  The capability to access individual micro/nano structures and to measure their properties is critical for advanced technologies. We develop new characterization techniques by unparalleled integration of micro/nano materials (e.g., quantum dots, nanowires, 2D materials).  Our team also focuses on quantitative

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Interface Engineering

  Molecular Junctions : The use of self-assembled monolayer in advanced (opto)electronic devices provides a whole new degree of freedom to integrate hetero-structural nanomaterials in 3D. An example includes molecular junction devices, where the integration strategy combined a high yield

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