2014年学术交流活动

2014-11-05 光学所管理员 23464

2014-10-27 (周一) 下午2:30

澳大利亚昆士兰理工大学Hongxia Wang 教授报告会

地点:新开湖畔光电子所化合物薄膜与器件研究室二楼会议室

报告人:Hongxia Wang, Assoc. Prof. Dr.

Title :Third Generation Solar Cells for Low Cost Solar Electricity

联系人:张毅教授

报告人介绍:

Biography

Assoc. Prof. Hongxia Wang is currently an Australian Research Council (ARC)Future Fellow and Associate Professor at Queensland University of Technology (QUT).Before this, she held the position of QUT Vice-Chancellor Senior Research Fellow (2010-2012) and Research Officer at University of Bath, UK (2007-2010).

Dr. Wang received her PhD  in Condence Matter Physics from Institute of Physics, Chinese Academy of Science in 2005. After that, she worked in the industry (Dyesol, Ltd) for two years before joining the university research environment.

Currently, her research group at QUT is mainly focus on development of new routes for low cost solar cells- work that includes new materials for solar cells including sensitized solar cells and thin film solar cells using earth abundant materials. Assoc. Prof. Wang has also devoted significantly to the study of the charge transfer and recombination processes in mesoporous structure of TiO2 film for dye-sensitized solar cells.

Dr.  Hongxia Wang has published over 50 peer-reviewed research papers in high impact international journals. She is also the inventor for three patents and one industrial product on dye-sensitized solar cells.

Abstract

The current commercial photovoltaic (PV) technologies are still restricted from widespread application in general household due to their higher cost per electricity watt compared to traditional fossil fuels. Thus over the last two decades huge efforts have been devoted to develop third generation PVs which have the feature of low cost, high efficiency and low environmental impact. These include sensitized solar cells which employ light absorbing material based on organic dye molecule or inorganic semiconductor nanocrystals or the recently developed perovskite material.    Besides light absorber, the nanostructure TiO2 film is another component which is crucial for high performance sensitized solar cells. An in-depth understanding the kinetics of charge transport and recombination in the mesoporous TiO2 film can provide the key information for the device, which will  in-turn guide material scientists to develop suitable materials for high performance sensitized solar cells. In my talk, I will present my research in the area of sensitized solar cells in terms of new material design and development as well as the fundamental study of the electron recombination in the device.

 

2014929日下午 三 点

学术报告

报告人:   王凯教授

报告地点:光电子所4楼会议室

报告题目:An Overview of Pixel Technology in Large Area X-ray Imaging

王凯教授个人简介:

Kai Wang is an assistant professor at SYSU-CMU Joint Institute of Engineering (JIE) since December 2013. He received a B.Sc. degree in Electrical Engineering from Huazhong University of Science & Technology, Wuhan, China in 2000, and a M.A. Sc. degree in Microelectronics & Solid State Electronics from Dalian University of Technology, Dalian, China in 2003. He earned his Ph. D. degree in Electrical & Computer Engineering from the University of Waterloo, Waterloo, Ontario, Canada in 2008 and was thereafter cross-appointed as a NSERC postdoctoral research fellow by Thunder Bay Health Science Centrewhere he had been conducting research on biomedical imaging until he joined Apple Inc. in Cupertino, California in August 2011. At Apple, he was involved in touch sensor development for various Apple products.

He has a broad spectrum of research interests including biomedical imaging, touch and display, biosensors, optoelectronics, and etc. He has published over 30 journal papers/conference proceedings and coauthored 8 patents. He also currently serves as an Associate Editor of IEEE/OSA Journal of Display Technology and is an active member of IEEE, SPIE and SID

 

Abstract:

Since its inception in 1896, X-ray imaging has been significantly applied in medical diagnostics. Radiographic X-ray imaging has evolved into digital radiography from film-type analogy technology. Amorphous silicon thin-film transistor based flat panel X-ray detector was introduced a decade ago, and has become a ubiquitous platform for almost all digital radiography modalities including chest radiography, mammography, and fluoroscopy. As a core of the detector, pixel technology has thus been developed to tackle the clinical challenge of digital radiography.

In this talk, I will present an overview of two fundamental pixel architectures: passive pixel sensor and active pixel sensor, followed by my very recent work in “smart” pixel.

We have reported the design and fabrication of high pixel per inch (PPI) LEDoS micro-displays with red, green blue and UV colors by integrating monolithic LED micro-arrays and active matrix substrates using Flip-Chip technology. A CMOS active matrix driving scheme was designed to provide sufficient drive capability and individual controllability of each LED pixel. The LEDoS micro-displays had 60×60 pixels on a single chip. The circular shape pixels had a diameter of 50μm and a resolution of 360 PPI. The emission wavelengths of the LEDoS micro-displays were 630nm, 535nm, 445nm and 380nm, respectively. The red, green and blue LEDoS micro-displays can be used to form a novel full-color direct-view display. The UV LEDoS micro-display could be used for modulated visible light communication systems or for data-modulated photo-pumped organic semiconductor devices. GaN-based LED solid-state lighting and monolithic integration with GaN power transistors by metal organic chemical vapor deposition (MOCVD) will also be introduced.

 

201478

浅谷耕一教授受聘南开大学讲座教授

201478日,浅谷耕一教授受聘南开大学讲座教授致聘仪式在二主楼A303教室举行,校长龚克、电子信息与光学工程学院院长赵颖、电子信息与光学工程学院通信工程系主任吴虹、电光学院教师代表和部分学生参加了致聘仪式。

致聘仪式由电光学院院长赵颖主持,赵院长简要介绍了浅谷耕一教授的基本情况及与我校电光学院开展的科研合作,随后由校长龚克为浅谷耕一教授授予聘书、佩戴校徽。在致聘仪式上,龚校长强调,通信工程,作为当代信息化社会不可或缺的前沿科学,在引领信息潮流、推动时代变革中发挥着越来越重要的作用,浅谷耕一教授为国际通信领域的知名专家,我们应以与浅谷耕一教授合作为契机,助力南开大学通信学科的发展。致聘仪式最后,浅谷耕一教授表示很高兴成为南开大家庭的一员,并会尽自己的所能开展多种合作,同时用地道的中文“允公允能、日新月异”表达了作为一名南开人的自豪与责任,博得了现场阵阵热烈的掌声。

为了促进南开大学在通信工程学科方面与国际知名大学之间的学术交流,与国际通信领域科技前沿接轨,培养我校在上述学科上的教学与科研人员,提升我校通信学科的综合竞争力,电子信息与光学工程学院通信工程系此次特聘请浅谷耕一教授为南开大学讲座教授,来我校开展通信与信息网络技术的研究工作,浅谷教授将在教学、科研、学科及团队建设、国际合作等领域,为南开大学通信学科的发展提供帮助。目前,浅谷耕一教授已与电光学院通信网络实验室进行了科研合作,每周定期召开讨论会,探讨网络发展的前沿技术和研究重点,双方已在网络带宽的测量和管理方面达成进一步研究的合作意向。

浅谷耕一,日本工学院大学计算机科学与通信系教授、系主任,日本早稻田大学客座教授。主要研究领域为下一代网络、VoIP、宽带网络、多媒体通信、光纤通信等。已出版日文、英文专著10余部,发表SCI/EI学术论文100余篇,获得数十项奖励。2011年,担任IEEE国际通信会议主席, 2007年,担任下一代网络国际会议主席,2005年至2010年,担任IP网络推广和标准化论坛主席。同时,担任多个国际期刊的编委。现为电子学会电子情报通信学会(IEICE)以及电气电子工程师协会(IEEE)成员,同时也是IEICE通信质量技术委员会和IEEE通信质量、可靠性和建模会议的创立者,在信息网络、理想网络、宽带网络等领域卓有建树,并拥有杰出成果。2013年获得日本国际电信联盟成就奖,2012年获得日本国际旅游组织奖,2011年获得ICC会议行政主席特别贡献奖,2006年至2008年期间,2010年至今,是IEEE杰出讲师。

 

2014630-72

报告1: Advanced Techniques Driving Cellular Mobile Communications Forward

时间:630, 14:00-17:00

地点:二主楼B105

 

报告2: Spectral-Efficiency of Multicell Systems with/without BS Cooperation

时间:71, 09:30-11:30

地点:二主楼B105

 

报告3: Multiple-Input Multiple-Output Systems: Capacity

时间:72, 09:30-11:30

地点:二主楼B105

报告人:Lie-Liang Yang

                Professor of Wireless Communications

                Communications, Signal Processing and Control (CSPC) Group

                School of Electronics and Computer Science

                Faculty of Physical Sciences and Engineering

                University of Southampton

Prof. Yang is a Fellow of the IET (previously IEE) in the UK and a senior member of the IEEE in the USA. He acted as TPC/symposium/area/track/workshop chairs for various conferences and was involved in the teams of Technical Programme Committees (TPC) of many conferences. He served as an associate editor to the IEEE Transactions on Vehicular Technology, Journal of Communications and Networks (JCN), etc., and he is currently an associate editor to the IEEE Access and the Security and Communication Networks (SCN) Journal. He was/is one of the guest editors for the special issues in: IEEE Journal on Selected Areas in Communications (2013), IEEE Wireless Communication Magazine (2013), IEEE Communication Magazine (2014), IEEE Systems Journal (2015).

 

201471日下午4

学术报告题目:

GaN-based LED Lighting, micro-displays, and monolithic integration with Power Transistors

报告人:刘召军 博士

报告地点:光电子所4楼会议室

刘召军博士个人简介:

刘召军博士于2011年毕业于香港科技大学电子与计算机工程系,获得博士学位; 2007年毕业于南开大学信息技术科学学院,获得硕士学位;2003年毕业于河北工业大学电气与自动化学院,获得学士学位;200610月至20074月,刘博士在先进显示与光电子技术国家重点实验室香港科技大学伙伴实验室担任研究助理;2011年至2013年,他于香港科技大学电子与计算机工程系担任博士后研究员;2013年至今,他在该系担任客座助理教授。20148月起,刘博士加入中山大学-卡内基梅隆大学联合工程学院并担任助理教授,博士生导师。刘博士在国内外知名杂志以及学术会议上发表论文20余篇;他拥有6项美国专利,其中2项已授权;27项中国专利,其中15项已授权。刘博士及其团队在2011年香港科技大学“百万港元创业大赛”中取得第二名的成绩。他还是两家LED相关公司的创始人之一。

刘博士的研究方向包括: LED微型显示以及LED固态照明;化合物半导体高速电子迁移率器件(HEMTs);微纳结构与器件;以及平板显示等。

摘要: In the past several years, LEDs have gradually substituted cold cathode fluorescent lamps (CCFLs) as the backlight of liquid crystal displays (LCDs) due to better luminous efficiency, long lifetime and wide color gamut. Although many technologies have been developed to reduce the power consumption, extremely low light utilization efficiency (LUE) of the backlight driving system in the LCD panels renders further power reduction difficult. Sequential color display can improve the LUE by about 2.7 times by removing the red, green and blue color filters. The system LUE however is still as low as 7.56% by calculation. LEDs, self-emitting devices without the need of backlight units, are suitable for many applications such as illumination and novel displays. LED micro-displays have the potential to enhance and improve the present capabilities of small LCDs and OLED displays with its excellent performance in many different aspects, particularly high LUE, simplicity of optical modules without backlight unit, long lifetime and excellent visibility under bright day-light. 

We have reported the design and fabrication of high pixel per inch (PPI) LEDoS micro-displays with red, green blue and UV colors by integrating monolithic LED micro-arrays and active matrix substrates using Flip-Chip technology. A CMOS active matrix driving scheme was designed to provide sufficient drive capability and individual controllability of each LED pixel. The LEDoS micro-displays had 60×60 pixels on a single chip. The circular shape pixels had a diameter of 50μm and a resolution of 360 PPI. The emission wavelengths of the LEDoS micro-displays were 630nm, 535nm, 445nm and 380nm, respectively. The red, green and blue LEDoS micro-displays can be used to form a novel full-color direct-view display. The UV LEDoS micro-display could be used for modulated visible light communication systems or for data-modulated photo-pumped organic semiconductor devices. GaN-based LED solid-state lighting and monolithic integration with GaN power transistors by metal organic chemical vapor deposition (MOCVD) will also be introduced.

 

2014228日上午1000

现代光学研究所学术报告

报告人:沈鸿

地点:伯苓楼玻璃房会议室

报告题目:Metallic nanostructures for linear and nonlinear optics 

报告内容摘要:

 

金属纳米结构的非线性光学特性

 

    金属纳米结构的表面等离基元共振特性(Plasmonics)所带来的局域场增强效应在多个领域得到了广泛应用。在非线性光学领域,由于非线性信号与电场的n次方成正比,因而纳米颗粒的非线性光学特性的研究成为近年来的研究热点。由于在具有中心对称结构的体系中不能产生二阶非线性光学效应,我们设计并制备了可以高效率产生二次谐波的两种非中心对阵的纳米结构,并通过对单个纳米颗粒非线性光学特性的表征,研究了其二次谐波产生机制。

 

II金属纳米结构在表面增强拉曼散射(SERS)方面的应用

   

    系统研究了金属纳米颗粒的表面等离基元特性对SERS的增强机制,通过对纳米结构的线性光学特性(Plasmonics)的优化而进一步提高SERS灵敏度;去极化金属纳米结构的LSPR 特性并应用于SERS

 

报告人情况介绍:

沈鸿,2006年中科院物理所获得理学博士学位(光物理)2007.10-2011.12在法国特鲁瓦工程技术大学,纳米技术与光学仪器重点实验室(LNIO, Institut Charles Delaunay  P2MN, Université de technologie de Troyes)做博士后研究工作。

主要研究工作为金属纳米结构的表面等离基元特性及非线性光学特性。在复杂纳米结构的表面等离子体特性,非线性光学特性方面取得一些创新性成果:实现两种高效率产生二次谐波(SHG)的纳米结构,其二阶非线性极化率c2)比KTP晶体高出两个数量级;系统研究了金属纳米结构的表面等离基元特性对表面增强拉曼散射(SERS)的影响,实现了复杂纳米结构的去极化表面等离子共振激发并应用于SERS

 

2014-2-20(周四)  上午9:00

荷兰代尔夫特大学 PVMD group 谭海仁 博士 学术报告会

地点:光电子薄膜器件与技术研究所会议室(伯苓楼5区光电所四楼会议室)

报告人:谭海仁

图片.png

Title:Thin-film silicon and Si-wafer based PV research activities at PVMD group, TU Delft

Hairen Tan was born in Jiangxi, China in 1986. He received the M.Sc. degree in Materials Physics and Chemistry from the Institute of Semiconductors, Chinese Academy of Sciences, Beijing in July 2011. His masters thesis project was on the interface engineering and plasmonic light trapping of polymer solar cells. Now he is a third-year PhD student at Delft University of Technology in Netherlands. He started the PhD study in the group of Photovoltaic Materials and Devices (www.pvmd.ewi.tudelft.nl) from July 2011. His research focuses on the advanced light trapping schemes for thin-film silicon solar cells, i.e., plasmonic and periodic nanostructures, micro-textured glass superstrates, and whispering-gallery mode resonators. As first-author, he has contributed to 5 oral presentations on international photovoltaic and nanophotonic conferences (IEEE-PVSC 2012, EU-PVSEC 2013, MRS Fall meeting 2013, etc.). He has also authored and co-authored more than 10 journal articles in Nano Letters, ACS Nano, Applied Physics Letters, etc. More detail can refer to Google Scholar