Description of exciton transport in a TiO2/MEH-PPV heterojunction photovoltaic material

K Kawata, V M Burlakov, M J Carey, H E Assender, G A D Briggs, A Ruseckas, I D W Samuel

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

A model for exciton transport in conjugated polymers has been developed taking into account inhomogeneous broadening of exciton energy level. Time-resolved photoluminescence data were used to determine the parameters of the model, such as exciton lifetime, effective number of exciton energy levels within inhomogeneously broadened density of states, hopping distance and hopping rate constants for excitons. Using the developed model a non-monoexponential decay of photoluminescence of the conjugated polymer deposited on TiO2 substrate was described, and the spectrum of internal quantum efficiency of the heterojunction photovoltaic device based on the conjugated polymer with a nanocrystalline TiO2 layer was predicted. (c) 2004 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)715-724
Number of pages10
JournalSolar Energy Materials and Solar Cells
Volume87
Issue number1-4
DOIs
Publication statusPublished - May 2005

Keywords

  • organic-inorganic composite solar cell
  • exciton transport in amorphous materials
  • internal quantum efficiency of a solar cell (incident photon to conducting electron conversion efficiency IPCE)
  • CONJUGATED POLYMERS
  • ENERGY-TRANSFER
  • POLY(PHENYLENEVINYLENE)
  • PHOTOLUMINESCENCE
  • DERIVATIVES
  • INTERCHAIN
  • COMPOSITES
  • ULTRAFAST
  • TIME
  • PPV

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