Title: Organic and Nanostructured Optoelectronic Devices
Speaker: Prof. Ni Zhao, Chinese University of Hong Kong
Venue: Room 308,Material Building 308
Invitor: Xudong Yang
Ni Zhao received her Ph.D degree in Physics from the University of Cambridge (UK) in 2008. From 2008-2010 she worked as a postdoctoral research fellow at the Massachusetts Institute of Technology (USA). Her work at MIT involved developing novel hybrid solar cell structures that incorporate colloidal nanocrystal quantum dots with organic and inorganic materials, and using these structures to study electronic processes in solar cells. Prior to MIT she worked in the Optoelectronic Group at the Cavendish Laboratory in Cambridge, UK. Her PhD dissertation was focused on device physics of polymer based field-effect transistors, charge transport mechanism at organic semiconductor/ dielectric interface and nanoscale patterning using inkjet-printing technique. During her M.S Degree, Zhao worked in the Xerox Research Center of Canada on novel semiconducting polymers and their applications in field-effect transistors.
Ni Zhao joined the Department of Electronic Engineering at the Chinese University of Hong Kong (CUHK) in December 2010.
Over the past several decades, intensive research efforts have been undertaken to develop optoelectronic devices through the use of nanostructured materials including small molecules, conjugated polymers and colloidal nanocrystal quantum dots. Unlike conventional semiconductors such as Si and GaAs, nanostructured materials are compatible with low-cost, large-area roll-to-roll processing, needing lower energy intensity for device fabrication; at the same time nanostructuring of solids enables tunability over electronic and optical properties. In this talk, I will discuss the design, fabrication and characterization of optoelectronic devices based on nanostructured materials. In the first part of the talk, I will address some of the key issues for realizing high-performance nanocrystal based infrared photodetectors. In the second part of the talk, I will focus on the biomedical applications of organic electronics. Specifically, I will talk about how these devices can be applied for continuous and unobtrusive monitoring of physiological parameters.