Intrinsically Stretchable Transparent Conductors and Polymer Electronic Devices
Prof. Qibing Pei
Department of Materials Science and Engineering
University of California, Los Angeles
Polymer composites based on silver nanowires or carbon nanotubes have been prepared with high transparency, low sheet resistance, and low surface roughness. The mechanical properties of the composite electrodes are determined by the polymer matrix employed, and ranges from being rigid to flexible and elastomeric. The composite electrodes have been used to demonstrate stretchable transparent Joule heating, touch sensing, and pressure sensing, large-strain actuation, and organic light emitting diodes and solar cells. The current efficiencies of polymer OLEDs based on the composite electrodes show significantly improved electroluminescent efficiency than control devices on ITO/glass. OLEDs having a simple three-layer structure: two composite electrodes sandwiching an emissive polymer layer can be deformed by up to 50% linear strain without damaging the electroluminescent properties.
Qibing Pei is Professor of Materials Science and Engineering at the University of California, Los Angeles. He specializes in electronic polymers, polymer light emitting diodes, electromechanically transducing polymers and devices, with over 120 peer-reviewed journal publications. He is the inventor or co-inventor of 39 issued US patents covering polymer light emitting electrochemical cells, dielectric elastomers with greater than 100% actuated strain, cavity emission organic LEDs, new light emitting polymers, and polymer artificial muscles. His current research activities include synthesis of conjugated polymers, stretchable polymer electronics, nanostructured composites, and dielectric elastomers for actuation and power generation. Dr. Pei received a B.S. degree from Nanjing University, China, and a PhD from the Institute of Chemistry, Chinese Academy of Science, Beijing. He was a postdoctoral scientist at Linköping University, Sweden, a senior chemist 1994-1997 at UNIAX Corporation (now DuPont Display), Santa Barbara, and a senior research engineer 1998-2004 at SRI International, Menlo Park. He has been on the UCLA faculty since 2004. He was named a Fellow of the SPIE in 2012
Tuesday, August 6
Michael's Restaurant at Shoreline Park Mountain View, CA 94043
6 PM social hour
7 PM dinner
8 PM lecture
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Breast of Chicken, Marsala