简介: |
Abstract
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 material processing; at the same time nanostructuring of solids enables tunability over electronic and optical properties. In this talk, I will discuss design, fabrication and characterization of solar cells and field-effect transistors based on nanostructured materials.
Firstly,I will address some of the key issues for realizing nanostructured solar cells and photodetectors.As an example, I will describe abilayered organic / quantum dot hybrid solar cell that is able to harvest a broad spectral range of the solar radiation, and at the same time exhibits excellent performance characteristics.Following the experimental results, the operation mechanismof the hybrid solar cell will be explained.Secondly, I will discuss studies on another type of nanostructured material, conjugated polymers, using a field-effect transistor structure. Specifically, the relationship between the processing of the polymer, its morphology, and the resulting charge transport properties will be described.
Bio
Ni Zhao received the B.Eng. degree in Material Science and Engineering from Tsinghua University in 2002, M.Sc degree in Material Science and Engineering fromMcMaster University in 2004, and the Ph.D. degree in Physics from the University of Cambridge in 2008. Between 2008-2010, she worked as a postdoctoral research fellow at the Massachusetts Institute of Technology (MIT).
Ni Zhao joined the Department of Electronic Engineering at the Chinese University of Hong Kong (CUHK) in December 2010. Her current research focus is todevelop scientific and technological approaches required to understand the electronic properties and fundamental physics of novel nanostructured semiconductors, and to apply the fundamental findings to the development of practical optoelectronic, electronic and electrochemical devices.
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