Our research spans over a broad range of the molecular optoelectronics based on nanophysical and photophysical engineerings of their excited states, i.e. Excitonic Engineering, in various emerging optoelectronic/photonic/energy materials including organic, polymeric, and organic-inorganic hybrid and low-dimensional semiconductors. Utilizing the chemical versatility of those materials, our primary focus has been the ground state engineering of their nano/micro-structures and the excited state engineering of their ultrafast dynamics. Ultimately, the goal is to overcome the predominant non-ideality of the materials and reach toward their theoretical limits. By doing so, we can realize a highly functioning material platform that can generate predictable, transferrable, reliable, and homogeneous properties. We believe it will have a great impact on future electronics such as solar cells, light emitting diodes, photosensors, optical switching and optoelectronic computing. Detailed fields of research are as follows:

Photophysics Thrust - Molecular Photochemistry of Semiconductors 

• Nanostructured Materials Photophysical analyses of various quasiparticle interactions in nanocrystals

• Multi-component Heterointerfaces Interfacial excited state dynamics in hierarchical nanomorphology

• Ultrafast Spectroscopy Femto-to-microsecond ultrafast pump-probe spectroscopy for excited state design

Electronics Thrust - Device Physics in Optoelectronic Applications

• • Semiconductor Device Physics Analyses of charge generation and recombination dynamics of semiconductor devices

  • Energy Conversions Devices Development of photovoltaic & photoctalytic devices with minimized non-ideal energy losses 

• Beyond-Moore Electronics Photonic logic computing systems base on multi-valued logic and neuromorphic devices