报 告 人：Dr. Junwen Zhong，University of California at Berkeley

报告题目：Flexible Electret and Piezoelectret Generators for Self-Powered Systems

报告时间: 2017年8月15日下午15:00-16:30 PM

报告地点：武汉光电国家实验室A302

Abstract: With the rise of intelligent wearable electronics and internet of things (IoT), energy harvesters converting rich but irregular mechanical energy into electricity have attracted much attention, as this method can reduce the dependence on batteries. Herein, various flexible generators based on electret and piezoelectret materials are successfully fabricated, with the fundamental working mechanism of electrostatic induction caused by the surplus charges. Specifically, the charges capturing ability of the electret and piezoelectret materials and the structure of the generators are optimized, in order to improve the output power and stability. These generators have been demonstrated the applications in mobile health care, human interaction and wireless communication, etc. These works not only offer new valuable insights, but will open up new perspectives to develop self-powered systems with high properties.

Biography: Dr. Junwen Zhong is a postdoctoral researcher in University of California at Berkeley. He received his B.S. degree (2011) and PhD degree (2016) from Huazhong University of Science and Technology, China. He majors in flexible generators, self-powered systems, active sensors, and mechanical actuators. He has published 8 patents, 1 book chapter and over 23 papers, among which 10 papers were published as the first author. Some of his papers were published in Energy & Environmental Science, Advanced Materials, ACS Nano, and Nano Energy, with over 1250 citations. Some of his researching works have been reported by Nature Nanotechnology, Scientific American, Chemical & Engineering, News, Nano Werk as highlights.