讲座名称：Developing Nanostructures for Solar Cell and Catalytic Applications讲座时间：4月29日（星期三）上午9:30-10:30

讲座地点：北二楼11层会议室

讲座人：Dongling Ma教授

邀请人：Lionel Vayssieres教授

讲座内容：

The work will be presented on three types of nanomaterials, based on near-infrared (NIR) quantum dots (QDs), transition metal (or metal oxide) nanohybrids and plasmonic nanostructures developed for solar cells and catalytic applications.

Harvesting NIR photons represents an attractive approach to improve the energy conversion efficiency of photovoltaics. Herein I present some of our most recent development in NIR QDs (e.g., PbS and PbS@CdS core@shell QDs) and their application in photovoltaics. One example is about the controlled hybridization of PbS QDs with carbon nanotubes (CNTs) and their further integration into poly(3-hexylthiophene), which is a hole-transporting polymer. The nanohybrid cells show considerably enhanced power conversion efficiency, which is attributed to the significantly extended absorption in NIR by PbS QDs and the effectively enhanced charge transportation due to CNTs.

Transition metal and transition metal oxide nanohybrids have also drawn a lot of attention during the past decade. They are extremely attractive for realizing high-efficiency, low-cost catalytic reactions. As an example, I present novel Ni-core@Ru-shell nanoparticles (NPs) synthesized via a new organometallic approach. These core-shell NPs show remarkable performance in the hydrolysis of ammonia borane, in addition to showing interesting superparamagnetic properties. Other recently developed hybrid nanostructures such asbinary oxide nanotubeswill also be presented.

On the other hand, plasmonic nanostructures have also been recently explored for enhancing the efficiency of solar cells and photocatalysis. Our recent work on some interesting plasmonic nanostructures (such as Ag nanorice and nanocarrots) that have strong resonances in the NIR regime, and their application in solar cells and photocatalysis will be briefly highlighted.

讲座人简介：

Dongling Ma教授，目前任职于魁北克大学国家科学研究院。研究兴趣包括各种纳米粒子，纳米杂化物或纳米复合材料的研发及其在能源、催化、生物医学领域的应用。于2004年取得美国伦斯勒理工学院材料科学工程博士学位，在伦斯勒纳米技术中心的研究方向是纳米粒子的表面修饰及其对聚合物纳米复合材料电学性质的影响；纳米粒子到微米管结构的自组装。2004年2月至2006年6月在加拿大国家研究委员会分子科学研究所担任自然科学与工程研究委员会客座研究员，这一时期的主要研究工作是染料掺杂的二氧化硅纳米粒子以及超顺磁-二氧化硅纳米粒子核壳结构的研发及其生物医学应用。