Photophysical and photoconductive properties of organic semiconductor composites

Andrew D. Platt, Whitney E.B. Shepherd, John E. Anthony, Oksana Ostroverkhova

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations


We report on the effects of introducing guest molecules into a functionalized anthradithiophene (ADT) host on the photoluminescent (PL) and photoconductive properties of solution-deposited thin films. An addition of 0.1 wt % of an ADT derivative with cyano end groups (ADT-TIPS-CN) to a fluorinated ADT derivative (ADT-TES-F) resulted in the near complete quenching of the fluorescence spectrum of the ADT-TES-F host with an enhancement in the fluorescence spectrum of the ADT-TIPS-CN guest. A markedly longer PL lifetime was noted in films containing 10% ADT-TIPS-CN guest molecules compared to both pristine ADT-TES-F and ADT-TIPS-CN films. Stronger temperature dependence of the PL quantum yield was obtained in ADT-TIPSCN/ADT-TES-F films at low ADT-TIPS-CN concentrations than in films of pristine material, with PL decreasing with increasing temperature. Significant changes in the photoexcited charge carrier dynamics were observed on nanosecond time-scales after 400 nm 100 fs pulsed photoexcitation upon adding ADT-TIPS-CN guest molecules to the ADT-TES-F host. In contrast, no considerable change in the photocurrent was detected under continuous wave 532 nm excitation for guest molecule concetrations up to 1% of ADT-TIPS-CN in ADT-TES-F.

Original languageEnglish
Title of host publicationLinear and Nonlinear Optics of Organic Materials IX
StatePublished - 2009
EventLinear and Nonlinear Optics of Organic Materials IX - San Diego, CA, United States
Duration: Aug 2 2009Aug 5 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X


ConferenceLinear and Nonlinear Optics of Organic Materials IX
Country/TerritoryUnited States
CitySan Diego, CA


  • Energy transfer
  • Organic semiconductors
  • Photoconductivity
  • Photoluminescence
  • Thin films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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