Simultaneous optimization of charge-carrier mobility and optical gain in semiconducting polymer films

Boon Kar Yap, Ruidong Xia, Mariano Campoy-Quiles, Paul N. Stavrinou, Donal D.C. Bradley

Research output: Contribution to journalArticle

175 Citations (Scopus)

Abstract

The combination of efficient light emission and high charge-carrier mobility has thus far proved elusive for polymer semiconductors, with high mobility typically achieved by cofacial -electron system to -electron system interactions that quench exciton luminescence. We report a new strategy, comprising the introduction of a limited number of more effective hopping sites between otherwise relatively isolated, and thus highly luminescent, polyfluorene chains. Our approach results in polymer films with large mobility (3-6×102 cm2 V1 s1) and simultaneously excellent light-emission characteristics. These materials are expected to be of interest for light-emitting transistors, light-emitting diode sources for optical communications and may offer renewed hope for electrically pumped laser action. In the last context, optically pumped distributed feedback lasers comprising one-dimensional etched silica grating structures coated with polymer have state-of-the-art excitation thresholds (as low as 30 W cm 2 (0.1 nJ per pulse or 0.3 J cm2) for 10 Hz, 12 ns, 390 nm excitation) and slope efficiencies (up to 11%).

Original languageEnglish
Pages (from-to)376-380
Number of pages5
JournalNature Materials
Volume7
Issue number5
DOIs
Publication statusPublished - 01 Jan 2008

Fingerprint

Semiconducting films
Semiconducting polymers
Optical gain
Carrier mobility
Light emission
carrier mobility
Charge carriers
Polymer films
charge carriers
Polymers
Optically pumped lasers
optimization
light emission
Electrons
Distributed feedback lasers
polymers
Optical communication
Excitons
Silicon Dioxide
Light emitting diodes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Yap, Boon Kar ; Xia, Ruidong ; Campoy-Quiles, Mariano ; Stavrinou, Paul N. ; Bradley, Donal D.C. / Simultaneous optimization of charge-carrier mobility and optical gain in semiconducting polymer films. In: Nature Materials. 2008 ; Vol. 7, No. 5. pp. 376-380.
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Simultaneous optimization of charge-carrier mobility and optical gain in semiconducting polymer films. / Yap, Boon Kar; Xia, Ruidong; Campoy-Quiles, Mariano; Stavrinou, Paul N.; Bradley, Donal D.C.

In: Nature Materials, Vol. 7, No. 5, 01.01.2008, p. 376-380.

Research output: Contribution to journalArticle

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