【讲座题目】Graphenes: the future of electronics? Plasma synthesis and case studies of supercapacitors and perovskite photovoltaics
【主 讲 人】Prof. John Bell, Head of the School of Chemistry, Physics and Mechanical Engineering at the Queensland University of Technology
John Bell completed his PhD at the age of 28 from the University of New South Wales (Sydeny, Australia) and undertook postdoctoral studies at Cornell University and CSIRO before commencing his academic career at the University of Technology Sydney. He has worked on a range of materials technologies, from thin films optical coatings, and smart windows, to nanowire fabrication and deformation studies. A key focus during his career has been renewable energy generation and energy efficiency in buildings. He is currently the Head of the School of Chemistry, Physics and Mechanical Engineering at the Queensland University of Technology, in Brisbane, Australia. He has published more than 140 refereed papers in international journals, is an editorial board member of Scientific Reports and is Chair of the Engineers Australia Working Group on Nanoengineering.
The versatility and significance of graphene and related analogues and carbon compounds has opened up the possibility of all carbon electronic devices. The interactions between these carbon-based materials and conducting polymers can lead to nanoscale heterojunctions, and open up the possibility of nanoscale electronic devices. The advantages of these type of electronic structures over traditional semiconductor devices are the possibility of large scale nanoelectronic device fabrication using self-assembly processes. I will outline a low temperature plasma process for producing graphene and carbon nanotubes, with significant tenability to control the properties, including approaches to developing methods of transferring graphene from the growth substrate to other substrates. The versatility of graphene is further highlighted in three quite different applications: two examples in energy storage (supercapacitors), showing capacitances exceeding 90F/g with some conditions showing up to 240 F/g; and one application in perovskite solar cells, demonstrating the improved stability of devices because water can be repelled by the graphite layer.