Issue 43, 2009

Diffusion-mediated resonant energy transfer in lanthanide-based polymer white-light-emitting diodes

Abstract

We present a single layer, polymer white light emitting diode (WOLED) based on novel organic lanthanide complexes. The device is solution processed and possesses CIE coordinates of (0.33, 0.38), corresponding to a high color purity white light emission. The electroluminescence in this diode is found to originate from both the direct charge trapping on the lanthanide complexes and from the efficient diffusion-assisted long-range energy transfer between the conductive matrix and these emissive dopants. An expression for the steady-state transfer efficiency is given, the role of excitation diffusion in the system under study is quantitatively evaluated, and the values for the singlet exciton diffusion coefficients and diffusion lengths in the host are determined.

Graphical abstract: Diffusion-mediated resonant energy transfer in lanthanide-based polymer white-light-emitting diodes

Article information

Article type
Paper
Submitted
01 Jun 2009
Accepted
28 Aug 2009
First published
16 Sep 2009

Phys. Chem. Chem. Phys., 2009,11, 10152-10156

Diffusion-mediated resonant energy transfer in lanthanide-based polymer white-light-emitting diodes

J. Mezyk, W. Mróz, A. Mech, U. Giovanella, F. Meinardi, C. Botta, B. Vercelli and R. Tubino, Phys. Chem. Chem. Phys., 2009, 11, 10152 DOI: 10.1039/B910668E

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