Work

Polarization-Driven Stark Shifts in Quantum Dot Luminescence from Single CdSe/oligo-PPV Nanoparticles

Year: 2010

Type: article

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.

Source: Nano Letters

DOI: 10.1021/nl1001789

Authors: K. T. Early, P. K. Sudeep, T. Emrick, M. D. Barnes

Institution: University of Massachusetts Amherst

Language: English

Topic: Quantum Dots Synthesis And Properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: U.S. Department of Energy, Division of Chemistry

Award: TAS::89 0227::TAS RECOVERY; RECOVERY ACT - POLYMER-BASED MATERIALS FOR HARVESTING SOLAR ENERGY -- EFRC; PI - THOMAS RUSSELL