Dresden 2006 – wissenschaftliches Programm

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CPP: Chemische Physik und Polymerphysik

CPP 25: POSTER Electronic Structure and Spectroscopy

CPP 25.8: Poster

Donnerstag, 30. März 2006, 17:00–19:00, P2

Imaging and Spectrally Discriminated Time-Resolved Photoluminescence of Single Aggregates of Semiconductor Nanocrystals — •Thomas Blaudeck and Frank Cichos — Photonics and Optical Materials, TU Chemnitz, 09107 Chemnitz

In our contribution, we present results of single-particle spectroscopy and time-resolved photoluminescence measurements on single NP aggregates. We make use of a home-built confocal microscope and time-resolved single-photon counting equipment with a precision in the ps regime. Using a photon-by-photon correlation technique, our idea is to determine fluorescence lifetime fluctuations on timescales shorter than accessible via conventional techniques. The results are correlated with typical processes of charge diffusion in the nanocrystals. The optical detection allows spectral discrimination in two channels.