Presentation 2002/9/10
Photoelectric properties of poly(9,9-dioctylfluorene) thin films
Masaru ANDO, Hideaki TAKAHASHI, Akiharu KOBAYASHI, Hiroyoshi NAITO,
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Abstract(in English) Optical properties of UV-light soaked polyfluorene (PFO), and aligned PFO on polyimide (P1) layers, have been studied by photoluminescence (PL) spectroscopy. The photo-oxidized states of PFO thin films were characterized by optical absorption, Fourier transform infrared absorption and electron spectroscopy for chemical analysis measurements. Temperature dependence of PL intensity of PFO is well described by a thermal quenching model, from which it is found that non-radiative decay enhances by photo-oxidation and that the height of potential barrier for the singlet excited states to the oxygen-related quenching centers is ~ 50 meV. The PFO thin films are found to be highly oriented, with the orientational order parameters evaluated by means of steady-state polarized absorption and fluorescence spectroscopy to be dependent on the cooling rates from the liquid crystalline phase. It is also found that the excimer emission becomes more remarkable in the PFO thin films with higher order parameters.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Polyfluorene / UV light irradiation / Quenching center / Excimer emission / steady-state polarized absorption and fluorescence spectroscopy / orientational order parameter
Paper # OME2002-48
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Conference Information
Committee OME
Conference Date 2002/9/10(1days)
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Paper Information
Registration To Organic Material Electronics (OME)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Photoelectric properties of poly(9,9-dioctylfluorene) thin films
Sub Title (in English)
Keyword(1) Polyfluorene
Keyword(2) UV light irradiation
Keyword(3) Quenching center
Keyword(4) Excimer emission
Keyword(5) steady-state polarized absorption and fluorescence spectroscopy
Keyword(6) orientational order parameter
1st Author's Name Masaru ANDO
1st Author's Affiliation Department of Physics and Electronics, Osaka Prefecture University()
2nd Author's Name Hideaki TAKAHASHI
2nd Author's Affiliation Department of Physics and Electronics, Osaka Prefecture University
3rd Author's Name Akiharu KOBAYASHI
3rd Author's Affiliation Department of Physics and Electronics, Osaka Prefecture University
4th Author's Name Hiroyoshi NAITO
4th Author's Affiliation Department of Physics and Electronics, Osaka Prefecture University
Date 2002/9/10
Paper # OME2002-48
Volume (vol) vol.102
Number (no) 303
Page pp.pp.-
#Pages 6
Date of Issue