Berlin 2008 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 52: Symposium Semiconducting Nanoparticles for Nano-Optics and Optoelectronics

HL 52.3: Hauptvortrag

Freitag, 29. Februar 2008, 11:30–12:00, ER 270

Photoluminescence Spectroscopy of Semiconductor Nanorods and Their Hybrid Structures — •Andrey Rogach — Physics Department and CeNS, LMU Munich

Colloidal semiconductor nanocrystals can be produced nowadays in a variety of sizes, shapes and compositions. Due to their flexible surface chemistry, colloidal nanocrystals are also very attractive objects for use as building blocks in different functional hybrid structures within the bottom-up assembly approaches. Starting from a general overview on semiconductor nanocrystals and their assemblies, we will switch to ensemble and single particle photoluminescence spectroscopy data on the 'nanocrystals of mixed dimensionality', consisting of spherical CdSe cores with elongated CdS shells. The quantum confined Stark effect is in particular pronounced in these nanorod-like particles, and we demonstrate this by direct manipulation of the excited state of the nanorods using strong external electric fields. Electrical control of energy transfer will be addressed on hybrid structures of CdSe/CdS nanorods and organic dye molecules.