The Contribution of Femtosecond Laser Spectroscopy to the Development of Advanced Optoelectronic Nanomaterials

Physical Chemistry Seminar Series

Femtosecond laser spectroscopy has now been for over a decade a powerful technique to investigate charge carrier dynamics in nanoscale optoelectronic systems with a temporal resolution of hundreds of femtoseconds or better. Both, transient absorption and time-resolved photoluminescence spectroscopy are popular spectroscopic techniques, which are well-established and provide direct insight into the charge carrier dynamics of nanomaterials. In this talk, I plan to focus mainly on the developments with regards to studies of semiconductor nanostructures and nanoparticle-conjugates. Controlling the charge carrier dynamics, including hot carrier relaxation, trapping, interfacial carrier transfer, and recombination is essential for successful energy conversion at the nanoscale. I will show how femtosecond laser spectroscopy evolved into techniques that unveil the dynamic charge carrier properties of nanomaterials interfaces, heterostructures and more complex functional nanoarchitectures and that femtosecond time-resolved laser spectroscopy can illuminate the way to design novel optoelectronic devices and emergent opto-electronic technologies.

For more information contact Prof. Mostafa El-Sayed (404-894-0292).