Polarization-driven stark shifts in quantum dot luminescence from single CdSe/oligo-PPV nanoparticles.
basic_science · Level V
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- Record sourced from PubMed, PMID 20392056.
- Also identified by DOI 10.1021/nl1001789.
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Abstract
We demonstrate polarization-induced spectral shifts and associated linearly polarized absorption and emission in single CdSe/oligo-(phenylene vinylene) (CdSe/OPV) nanoparticles. A mechanism for these observations is presented in which charge separation from photoexcited ligands results in a significant Stark distortion of the quantum dot electron/hole wavefunctions. This distortion results in an induced linear polarization and an associated red shift in band-edge photoluminescence. These studies suggest the use of single quantum dots as local charge mobility probes.
Medical subject headings
- Cadmium Compounds
- Crystallization
- Luminescent Measurements
- Models, Chemical
- Nanostructures
- Nanotechnology
- Quantum Dots
- Refractometry
- Selenium Compounds