Nanogenerators for self-powered systems and piezotronics for smart devices

讲座标题:Nanogenerators for self-powered systems and piezotronics for smart devices

主讲人: 中科院外籍院士、欧洲科学院院士:王中林教授

讲座时间:2015-10-13 09:40

讲座地点:杨浦行政中心9楼1号会议室

讲座语言:中文

主办单位:数理学院


讲座内容:


  Developing wireless nanodevices and nanosystems is of critical importance for sensing, medical science, environmental/infrastructure monitoring, defense technology and even personal electronics. It is highly desirable for wireless devices to be self-powered without using battery. Nanogenerators (NGs) have been developed based on piezoelectric, trioboelectric and pyroelectric effects, aiming at building self-sufficient power sources for mico/nano-systems. The output of the nanogenerators now is high enough to drive a wireless sensor system and charge a battery for a cell phone, and they are becoming a vital technology for sustainable, independent and maintenance free operation of micro/nano-systems and mobile/portable electronics. An energy conversion efficiency of 55% and an output power density of 500 W/m2 have been demonstrated. This technology is now not only capable of driving portable electronics, but also has the potential for harvesting wind and ocean wave energy for large-scale power application. This talk will focus on the updated progress in NGs.

  For Wurtzite and zinc blend structures that have non-central symmetry, such as ZnO, GaN and InN, a piezoelectric potential (piezopotential) is created in the crystal by applying a strain. Such piezopotential can serve as a “gate” voltage that can effectively tune/control the charge transport across an interface/junction; electronics fabricated based on such a mechanism is coined as piezotronics, with applications in force/pressure triggered/controlled electronic devices, sensors, logic units and memory. By using the piezotronic effect, we show that the optoelectronc devices fabricated using wurtzite materials can have superior performance as solar cell, photon detector and light emitting diode. Piezotronics is likely to serve as a “mechanosensation” for directly interfacing biomechanical action with silicon based technology and active flexible electronics. This lecture will focus on the updated progress in the field and its expansion to 2D materials.


主讲人简介:


  王中林教授是中国科学院外籍院士和欧洲科学院院士,美国佐治亚理工学院终身校董事讲席教授, Hightower终身讲席教授,首位中组部“高端人才”顶尖人才,中国科学院北京纳米能源与系统研究所首任所长。

  王教授曾荣获多项国际大奖,包括2014年美国物理学会James C. McGroddy 新材料奖,2013中华人民共和国国际科学技术合作奖,2014年佐治亚理工学院杰出教授终身成就奖, 2014年欧洲NANOSMAT奖,2014年材料领域世界技术奖,2015年汤森路透2015年度引文桂冠奖。他发明的纳米发电机,创立的压电电子学和压电光电子学具有重大的原创影响力,王中林被汤森路透预言为2015年竞争诺贝尔物理奖的热门人选。

  王教授已在国际一流刊物上发表了1050篇期刊论文(其中12篇发表在美国《科学》,4篇发表在《自然》期刊上;10篇发表在《自然》子刊上)﹐45篇书章节﹐200项专利,5本专著和20余本编辑书籍和会议文集。他已被邀请做过850多次学术讲演和大会特邀报告。他的学术论文已被引用86,000次以上。他论文被引用的H因子(h-index)是141。他是世界上在材料和纳米技术论文引用次数最多的前五位作者之一。王教授在当今世界最杰出的科学家排名榜上第25名 (http://superstarsofscience.com/scientists).

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