Optical, photoluminescent, and photoconductive properties of functionalized anthradithiophene and benzothiophene derivatives

Whitney E.B. Shepherd, Andrew D. Platt, Garrett Banton, Marsha A. Loth, John E. Anthony, Oksana Ostroverkhova

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

5 Scopus citations

Abstract

We present optical, photoluminescent (PL), and photoconductive properties of functionalized anthradithiophene (ADT) and benzothiophene (BTBTB) derivatives and their composites. Solution-deposited ADT films exhibit charge carrier mobilities of over 1.5 cm2/Vs, high PL quantum yields, and high photoconductivity at room temperature. We show molecular arrangement and intermolecular interactions significantly contribute to the (opto)electronic properties of thin films of these pi-stacked materials. In addition, these properties can be effectively manipulated through the addition of guest molecules to a host material. In particular, exciton and charge carrier dynamics can be varied using a competition between photoinduced charge and energy transfer in a guest-host system. To better understand these processes at a molecular level, we apply single-molecule fluorescence spectroscopy (SMFS) to probe the effects of intermolecular interactions on the molecular properties. Specifically, we demonstrate that ADT molecules exhibit high enough quantum yields and photostability to be imaged on a single-molecule level at room temperature. Moreover, we show that stability of single ADT molecules immobilized in a solid-state matrix are comparable to those of the best fluorophores utilized in SMFS.

Original languageEnglish
Title of host publicationOrganic Photonic Materials and Devices XII
DOIs
StatePublished - 2010
EventOrganic Photonic Materials and Devices XII - San Francisco, CA, United States
Duration: Jan 26 2010Jan 28 2010

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7599
ISSN (Print)0277-786X

Conference

ConferenceOrganic Photonic Materials and Devices XII
Country/TerritoryUnited States
CitySan Francisco, CA
Period1/26/101/28/10

Keywords

  • Organic semiconductors
  • Photoconductivity
  • Single molecule fluorescence spectroscopy

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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