Strathprints Home | Open Access | Browse | Search | User area | Copyright | Help | Library Home | SUPrimo

Efficient energy transfer in organic thin films - implications for organic lasers

Sheridan, A.K. and Buckley, A.R. and Fox, A.M. and Bacher, A. and Bradley, D.D.C. and Samuel, I.D.W. (2002) Efficient energy transfer in organic thin films - implications for organic lasers. Journal of Applied Physics, 92 (11). pp. 6367-6371. ISSN 0021-8979

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

We show that efficient nonradiative (Förster) energy transfer between solid films of two highly luminescent perylene dyes blended in a solid film can be used to control the amplified spontaneous emission (ASE) emitted from the films under pulsed optical excitation. Perylene orange, which acts as the donor, and perylene red, which is the acceptor, are doped into a host matrix of poly(methylmethacrylate) (PMMA). We report the ASE behavior as a function of acceptor concentration, and observe a sudden change in the spectral position of the ASE at an acceptor:donor concentration of 1:9 by weight. Below this concentration, emission is at 590 nm, which is characteristic of ASE from undoped perylene orange:PMMA blends, whereas films with higher acceptor concentrations produced ASE spectra centered at 620 nm, which is characteristic of perylene red:PMMA blends. In order to understand this behavior, the rate constant for energy transfer between the dyes was measured and found to be 5.0±0.2×1011 s−1 (mol/dm3)−1. We used this to deduce an upper limit for the stimulated emission rate of 4.9±0.2×108 s−1.

Item type: Article
ID code: 38728
Keywords: energy transfer , organic thin films , organic lasers, Electrical engineering. Electronics Nuclear engineering
Subjects: Technology > Electrical engineering. Electronics Nuclear engineering
Department: Faculty of Engineering > Electronic and Electrical Engineering
Related URLs:
    Depositing user: Pure Administrator
    Date Deposited: 27 Mar 2012 12:24
    Last modified: 16 Jul 2013 21:29
    URI: http://strathprints.strath.ac.uk/id/eprint/38728

    Actions (login required)

    View Item