@inproceedings{2fc9b10e5e96480d8e067a97aeb69ae6,
title = "Photophysical and photoconductive properties of organic semiconductor composites",
abstract = "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.",
keywords = "Energy transfer, Organic semiconductors, Photoconductivity, Photoluminescence, Thin films",
author = "Platt, {Andrew D.} and Shepherd, {Whitney E.B.} and Anthony, {John E.} and Oksana Ostroverkhova",
year = "2009",
doi = "10.1117/12.826634",
language = "English",
isbn = "9780819477033",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Linear and Nonlinear Optics of Organic Materials IX",
note = "Linear and Nonlinear Optics of Organic Materials IX ; Conference date: 02-08-2009 Through 05-08-2009",
}