Title

Temperature-Tuning of Near-Infrared (1.5µm) Monodisperse Quantum Dot Solids Toward Controllable Förster Energy Transfer

Editor(s)

Alivisatos, A. Paul and Lieber, Charles M.

Abstract

We present the first time-resolved cryogenic observations of Förster energy transfer in large, monodisperse lead sulfide quantum dots with ground-state transitions near 1.5 µm (0.8 eV), in environments from 160 K to room temperature. The observed temperature-dependent dipole-dipole transfer rate occurs in the range of (30-50 ns)ˉ¹, measured with our confocal single-photon counting setup at 1.5 µm wavelengths. By temperature-tuning the dots, 94% efficiency of resonant energy transfer can be achieved for donor dots. The resonant transfer rates match well with proposed theoretical models.

Department(s)

Mechanical and Aerospace Engineering

International Standard Serial Number (ISSN)

1530-6984

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2008 American Chemical Society (ACS), All rights reserved.

Share

 
COinS