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INTEGRATED NANOSTRUCTURES AND MATERIALS FOR FLEXIBLE AND HIGH-PERFORMANCE OPTOELECTRONIC DEVICES

时间:2017-08-11 11:07 点击:
报告人:Zhiyong Fan
报告时间:2017年8月14日上午10:00-11:00
报告地点:南校区G楼118报告厅
报告简介:
Materials made of nano/micro-structures have unique physical properties, such as fast carrier transport, high surface-to-volume ratio, mechanical flexibility, sub-wavelength optical waveguiding, etc. These intriguing properties can be harnessed for a variety of applications in electronics and photonics. In the past, we have fabricated an assortment of arrayed nanostructures consist of nanowires, nanopillars, nanocones, etc., using a variety of materials from inorganic semiconductors to organometal perovskite materials. These nanomaterials can be fabricated with chemical vapor deposition method and/or printable method with scalability. The optical properties of these nanostructures have been systematically investigated and the mechanism of light trapping was revealed. Meanwhile, the materials have been fabricated into various optoelectronic devices, including photodetectors and solar cells. The study has shown that three-dimensionally (3-D) arrayed nanostructures can help to improve solar cell device energy conversion efficiency, as well as the flexibility. However, proper structural optimization is not trivial. Using printable method and template guided growth method, semiconductor nanowires have been fabricated into planar arrays and 3-D arrays for photodetectors. High device responsivity and detectivity have been discovered and investigated. Moreover, proof-of-concept flexible image sensor devices with high density 3-D nanowire arrays have been fabricated which have potency to achieve ultra-high resolution. Overall, the nanostructure integration methodology that we developed may enable many applications on electronics and optoelectronics in the future.
 
报告人介绍:
Dr. Zhiyong Fan received his B. S. and M. S. degrees in Materials Science from Fudan University, Shanghai, China, in 1998 and 2001. He received Ph.D. degree from University of California, Irvine in 2006 in Materials Science as well. From 2007 to 2010, he worked at University of California, Berkeley as a postdoctoral fellow in department of Electrical Engineering and Computer Sciences, with a joint appointment with Lawrence Berkeley National Laboratory. In May 2010, he joined The Hong Kong University of Science and Technology (HKUST) and currently he is an associate professor in department of Electronic and Computer Engineering. Dr. Fan has won a number of awards including IEEE Sensor Research Scholarship Award, UC Berkeley BSAC Outstanding Research Presentation Award, HKUST Young Investigator Award and HKUST President’s Award and Innovation Award, etc. His research interest focuses on fabrication and characterization of nanomaterials and nanostructures, their applications for electronics and energy harvesting. He has published more than130 referred papers with over 12,000 citations and H-index of 51. Currently he is serving as an Associate Editor of Science Bulletin and Nanoscale Research Letters.