Hole intraband relaxation and the exciton radiative lifetime in CdSe quantum dots

S. Xu, J. A. Hollingsworth, Victor I Klimov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Summary form only given. Colloidal synthesis allows preparation of almost monodispersed semiconductor nanoparticles with sizes from 1 to 10 nm and size dispersions as small as 5%. These nanoparticles are also known as nanocrystals or colloidal quantum dots (QDs). The sub-10-nm size range corresponds to a regime of strong quantum confinement for which electronic energy structures exhibit a pronounced dependence on particle size. Tunable electronic structures combined with the ease of chemical manipulation, make colloidal QDs ideal building blocks for electronic and optical nanodevices. An important step towards realization of such devices is development of understanding of carrier relaxation processes in QDs and in particular the effect of QD size and surface properties on competition between radiative and nonradiative decay channels. In the present work, we apply femtosecond (fs) photoluminescence (PL) and transient absorption (TA) spectroscopies to study carrier relaxation dynamics in CdSe QDs and in particular to derive a radiative lifetime of the lowest exciton state.

Original languageEnglish
Title of host publicationTechnical Digest - Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, QELS 2001
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages86-87
Number of pages2
ISBN (Print)155752663X, 9781557526632
DOIs
Publication statusPublished - 2001
EventQuantum Electronics and Laser Science Conference, QELS 2001 - Baltimore, United States
Duration: May 6 2001May 11 2001

Other

OtherQuantum Electronics and Laser Science Conference, QELS 2001
CountryUnited States
CityBaltimore
Period5/6/015/11/01

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Radiation

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    Xu, S., Hollingsworth, J. A., & Klimov, V. I. (2001). Hole intraband relaxation and the exciton radiative lifetime in CdSe quantum dots. In Technical Digest - Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference, QELS 2001 (pp. 86-87). [961891] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/QELS.2001.961891