Experimental verification of Förster energy transfer between semiconductor quantum dots

DaeGwi Kim, Shinya Okahara, Masaaki Nakayama, and YongGu Shim
Phys. Rev. B 78, 153301 – Published 2 October 2008; Erratum Phys. Rev. B 78, 239901 (2008)

Abstract

In recent years, energy transfer (ET) using semiconductor quantum dots (QDs) is getting increased attention. However, it has been postulated that ET between QDs is based on the Förster model, which is a well-established model of ET mechanism in organic dye systems, without verification. In this work, we have investigated ET mechanism in colloidal CdS QDs measuring photoluminescence dynamics of a bilayer structure consisting of differently sized CdS QDs. In the bilayer structure, the distance between the monolayer of donor QDs and that of acceptor QDs was controlled precisely by a spacer layer that is layer-by-layer assembly of polyelectrolytes. The bilayer structure enabled us to systematically measure the spacer-layer dependence of photoluminescence dynamics reflecting the ET process between QDs. It is demonstrated that ET between the donor and acceptor QDs is conclusively dominated by the dipole-dipole interaction, which verifies the appropriateness of the Förster model.

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  • Received 16 June 2008

DOI:https://doi.org/10.1103/PhysRevB.78.153301

©2008 American Physical Society

Erratum

Erratum: Experimental verification of Förster energy transfer between semiconductor quantum dots [Phys. Rev. B 78, 153301 (2008)]

DaeGwi Kim, Shinya Okahara, Masaaki Nakayama, and YongGu Shim
Phys. Rev. B 78, 239901 (2008)

Authors & Affiliations

DaeGwi Kim*, Shinya Okahara, and Masaaki Nakayama

  • Department of Applied Physics, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan

YongGu Shim

  • Department of Physics and Electronics, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan

  • *Present address: Department of Applied Physics, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan. tegi@a-phys.eng.osaka-cu.ac.jp

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Issue

Vol. 78, Iss. 15 — 15 October 2008

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