DocumentCode :
2272961
Title :
Dynamics of Forster energy transfer in polyfluorene-based polymer blends
Author :
Hill, J. ; Buckley, A.R. ; Rahn, M.D. ; Heriot, S.Y. ; Worsfold, O. ; Richardson, T.H. ; Fox, A.M. ; Cabanillas-Gonzalez, J. ; Bradley, D.D.C.
Author_Institution :
Dept. of Phys. & Astron., Univ. of Sheffield, UK
fYear :
2002
fDate :
24-24 May 2002
Firstpage :
492
Abstract :
Summary from only given. Polymer blend systems have become increasingly important for use in organic light emitting diodes, offering improved device performance through balanced carrier injection and reduced self-absorption losses. In this work we present a detailed study of the dynamics of Forster energy transfer in commercially-important polyfluorene based polymer blend systems using time-resolved photoluminescence spectroscopy. We find that the conventional description based on the Forster radius is not readily applicable due to the poorly defined inter-molecule separation in the blend systems. By using the Langmuir-Blodgett technique to prepare layered nanostructures with precisely controlled host-guest separation, we have demonstrated accurately controllable transfer times and obtained improved understanding of the Forster processes in polymer blends.
Keywords :
Langmuir-Blodgett films; light emitting diodes; nanostructured materials; optical films; optical polymers; photoluminescence; polymer blends; time resolved spectra; Forster energy transfer dynamics; Langmuir-Blodgett technique; balanced carrier injection; controlled host-guest separation; device performance; inter-molecule separation; layered nanostructures; organic light emitting diodes; polyfluorene-based polymer blends; polymer blend systems; self-absorption losses; time-resolved photoluminescence spectroscopy; transfer times; Absorption; Acoustic refraction; Energy exchange; Four-wave mixing; Gratings; Nonlinear optics; Optical materials; Optical refraction; Organic light emitting diodes; Polymers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Lasers and Electro-Optics, 2002. CLEO '02. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Long Beach, CA, USA
Print_ISBN :
1-55752-706-7
Type :
conf
DOI :
10.1109/CLEO.2002.1034242
Filename :
1034242
Link To Document :
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