Semiconductor nanocrystals - versatile building blocks for innovative microsystems

摘要

Semiconductor nanocrystals, so-called quantum dots, with a typical diameter range of 3-7 nm exhibit several exceptional properties. Among them is high quantum efficiency regarding fluorescence, but also high sensitivity against electrical charges and fields. Consequently, quantum dots are not only innovative light emitters, but also excellent building blocks for nanosensors. In this paper some basics of electro- and photoluminescence of semiconductor nanocrystals are described. Further we present some results on the preparation and characterization of CdSe nanocrystal-polymer composites. Finally, examples concerning the use of nanocrystals as light emitters in a quantum dot LED and nanosensors will be given.