Experimental and theoretical investigation of electronic structure in colloidal indium phosphide quantum dots

Randy J. Ellingson, Jeffrey L. Blackburn, Jovan Nedeljkovic, Garry Rumbles, Marcus Jones, H. Fu, Arthur J. Nozik

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

We present detailed electronic structure calculations, based on an atomistic pseudopotential approach, for a 42 Å InP QD; theoretical results are correlated to results of experimental measurements. To better understand energy loss dynamics and mechanisms for hot carriers in QDs, we investigate relaxation between electronic levels in InP QDs with diameters significantly smaller than twice the Bohr exciton radius. Energy level spacings exceeding the optical phonon energy present the opportunity for slowed charge carrier cooling (phonon bottleneck effect). However, interaction between confined electrons and holes provides an alternate, efficient relaxation route. Therefore, we expect sufficiently fast charge separation to weaken the Coulomb interaction and decrease the electronic energy loss rate. We study electronic relaxation in InP QDs using variations of subpicosecond transient absorption spectroscopy.

Original languageEnglish
Pages (from-to)1229-1232
Number of pages4
JournalPhysica Status Solidi C: Conferences
Issue number4
DOIs
Publication statusPublished - Dec 1 2003
Event2nd International Conference on Semiconductor Quantum Dots, QD 2002 - Tokyo, Japan
Duration: Sep 30 2002Oct 3 2002

ASJC Scopus subject areas

  • Condensed Matter Physics

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