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
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.