Vol. 21 No. 1 (2011)
Papers

Spectroscopic and Photoluminescent Properties of Nanostructured Polyfluorenes/TiO<SUB>2</SUB> Composite Films used for OLEDs

Nguyen Nang Dinh
College of Technology, Vietnam National University, Hanoi
Le Ha Chi
College of Technology, Vietnam National University, Hanoi
Tran Thi Chung Thuy
College of Technology, Vietnam National University, Hanoi
Thien Phap Nguyen
Institut des Matériaux Jean Rouxel, Nantes, France

Published 31-03-2011

Keywords

  • PF,
  • nanocomposite film,
  • photoluminescence (PL),
  • luminescence quenching

How to Cite

Dinh, N. N., Chi, L. H., Chung Thuy, T. T., & Nguyen, T. P. (2011). Spectroscopic and Photoluminescent Properties of Nanostructured Polyfluorenes/TiO<SUB>2</SUB> Composite Films used for OLEDs. Communications in Physics, 21(1), 51. https://doi.org/10.15625/0868-3166/21/1/93

Abstract

In this work we present spectroscopic and photoluminescent properties of nanostructured polymeric composite films of nanocrystalline TiO2 and polyfuorenes (PF+nc-TiO2). The films were deposited onto glass and KBr substrates by spin-coating PF-in-toluene solution with embedding of 5-nm thick nc-TiO2 particles. The nc-TiO2 wt concentration embedded in PF was chosen as 1%, 2% and 4%. The FTIR, FTR, UV-VIS-NIR and photoluminescence characterization were carried-out to study the influence of oxide nanoparticles on the absorption spectra, molecular structures and emissive luminescence of the composites. It was shown that the presence of TiO2 nanoparticles results in improvement of charge separation of carriers generated by light excitation. Under a short wavelength excitation, in some samples a PL enhancement was observed. Under normal or long wavelength excitation, PF fluorescence quenching occurred for all the composites. Aging process of the composites was also investigated.

Downloads

Download data is not yet available.

Metrics

Metrics Loading ...