Mobility and dynamics of charge carriers in rubrene single crystals studied by flash-photolysis microwave conductivity and optical spectroscopy

Akinori Saeki, Shu Seki, Taishi Takenobu, Yoshihiro Iwasa, Seiichi Tagawa

Research output: Contribution to journalArticle

130 Citations (Scopus)

Abstract

The optoelectronic properties of single-crystal rubrene were studied by investigating the charge-carrier dynamics and mobility, by flash-photolysis time-resolved microwave conductivity (TRMC) and transient optical microscopy (TOS). The emission maximum located at 630 nm shows a red-shift of about 60 nm relative to solution. The single-crystal nature is anticipated to account for the clear dependence on photon density, while various grain boundaries and chemical/physical defects hide this dependence. The TMRC mobility of holes obtained at a 10μs delay is found to be (3.6∓0.8)×10 -2cm2V-1s-1, which is 70% of that at the pulse end. The anisotropic conductivity of single-crystal rubrene with charge-carrier motion on the nanoscale is achieved on the micrometer scale.

Original languageEnglish
Pages (from-to)920-923
Number of pages4
JournalAdvanced Materials
Volume20
Issue number5
DOIs
Publication statusPublished - 2008 Mar 5
Externally publishedYes

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Photolysis
Charge carriers
Microwaves
Single crystals
Optoelectronic devices
Optical microscopy
Grain boundaries
Photons
Defects
rubrene
Optical spectroscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Mobility and dynamics of charge carriers in rubrene single crystals studied by flash-photolysis microwave conductivity and optical spectroscopy. / Saeki, Akinori; Seki, Shu; Takenobu, Taishi; Iwasa, Yoshihiro; Tagawa, Seiichi.

In: Advanced Materials, Vol. 20, No. 5, 05.03.2008, p. 920-923.

Research output: Contribution to journalArticle

Saeki, Akinori ; Seki, Shu ; Takenobu, Taishi ; Iwasa, Yoshihiro ; Tagawa, Seiichi. / Mobility and dynamics of charge carriers in rubrene single crystals studied by flash-photolysis microwave conductivity and optical spectroscopy. In: Advanced Materials. 2008 ; Vol. 20, No. 5. pp. 920-923.
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