Jang-Kyo Kim

Department of Mechanical Engineering, Hong Kong University of Science & Technology, Clear Water Bay, Kowloon, Hong Kong

 

This talk presents the most recent state-of-the-art development and future prospects of chemically converted graphene sheets as transparent conducting (TC) films. Since single layer graphene was first isolated from graphite in 2004, significant research efforts have been directed towards developing methods to produce graphene-based transparent conductors. Almost all modern portable and house-hold electronics are driven by optoelectronics that are based on transparent conductors in components such as touch screens, liquid crystal displays, organic photovoltaic cells and organic light-emitting diodes. Because of its excellent electrical, optical and mechanical properties, graphene is considered an ideal material to replace the existing, expensive indium tin oxide as transparent conducting film. Chemically converted graphene is synthesized from colloidal suspension, which is not only scalable for high volume production, but is also versatile in practical application. We have successfully produced graphene–based transparent conducting films with transparency well over 80% and the electrical conductivity over 200 S/cm, which are considered sufficient for TC films. Hybrid films containing both carbon nanotubes and graphene or graphene thin films with doping treatment for improved conductivity and transparency are also discussed. If time permits, the talk also discusses about recent development of Li ion battery electrode materials based on carbon nanotubes and graphene.

 

 

 

Prof. Kim obtained his B Eng degree in Aeronautical Engineering from Seoul National University, Korea; MSc degree in Materials Engineering from Monash University; PhD degree in composite materials from Mechanical Engineering Department, University of Sydney, Australia. He started his faculty career as Assistant Professor at Australian National University in 1992; and joined the Hong Kong University of Science & Technology (HKUST) in 1994, where he is currently a professor, Associate Dean of Engineering, and Directors of the Nano-technology Program and the Finetex-HKUST R & D Center. He published widely with 10 books and over 170 referred journal papers in the broad area of composites and advanced materials. He serves in the editorial boards of eight international journals in this area. Prof. Kim is currently the President of the Asian-Australasian Association for Composite Materials (AACM) since 2008.