Laser characteristics of a family of benzene-cored star-shaped oligofluorenes

Georgios Tsiminis, Neil A. Montgomery, Alexander L. Kanibolotsky, Arvydas Ruseckas, Igor F. Perepichka, Peter J. Skabara, Graham A. Turnbull, Ifor D. W. Samuel

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A family of star-shaped conjugated oligofluorene molecules based around a central benzene core is studied with the aim of identifying how changes in molecular structure can affect the laser performance of organic materials. As the oligofluorene arm length increases the optical transitions are found to move to longer wavelength, there is an increase in photoluminescence quantum yield and a corresponding reduction in the excitation density for amplified spontaneous emission. Distributed-feedback lasers based on these materials are tunable across 402-462 nm with lasing thresholds as low as 1.1 kW cm(-2) and efficiencies as high as 6.6%. The laser performance is compared with that of family of star-shaped molecules with different core structure. This shows that a reduction in intermolecular interactions is very important to achieving high performance lasing in organic semiconductors.

LanguageEnglish
Article number094005
Number of pages6
JournalSemiconductor Science and Technology
Volume27
Issue number9
DOIs
Publication statusPublished - 1 Sep 2012

Fingerprint

Benzene
Stars
benzene
stars
Molecules
Semiconducting organic compounds
Optical transitions
lasing
Lasers
Distributed feedback lasers
Spontaneous emission
Quantum yield
Molecular structure
lasers
Photoluminescence
distributed feedback lasers
organic semiconductors
organic materials
optical transition
Wavelength

Keywords

  • polymers
  • organics
  • laser characteristics
  • phosphorescence spectra
  • quantum optics
  • lasers

Cite this

Tsiminis, G., Montgomery, N. A., Kanibolotsky, A. L., Ruseckas, A., Perepichka, I. F., Skabara, P. J., ... Samuel, I. D. W. (2012). Laser characteristics of a family of benzene-cored star-shaped oligofluorenes. Semiconductor Science and Technology, 27(9), [094005]. https://doi.org/10.1088/0268-1242/27/9/094005
Tsiminis, Georgios ; Montgomery, Neil A. ; Kanibolotsky, Alexander L. ; Ruseckas, Arvydas ; Perepichka, Igor F. ; Skabara, Peter J. ; Turnbull, Graham A. ; Samuel, Ifor D. W. / Laser characteristics of a family of benzene-cored star-shaped oligofluorenes. In: Semiconductor Science and Technology. 2012 ; Vol. 27, No. 9.
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Tsiminis, G, Montgomery, NA, Kanibolotsky, AL, Ruseckas, A, Perepichka, IF, Skabara, PJ, Turnbull, GA & Samuel, IDW 2012, 'Laser characteristics of a family of benzene-cored star-shaped oligofluorenes' Semiconductor Science and Technology, vol. 27, no. 9, 094005. https://doi.org/10.1088/0268-1242/27/9/094005

Laser characteristics of a family of benzene-cored star-shaped oligofluorenes. / Tsiminis, Georgios; Montgomery, Neil A.; Kanibolotsky, Alexander L.; Ruseckas, Arvydas; Perepichka, Igor F.; Skabara, Peter J.; Turnbull, Graham A.; Samuel, Ifor D. W.

In: Semiconductor Science and Technology, Vol. 27, No. 9, 094005, 01.09.2012.

Research output: Contribution to journalArticle

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Tsiminis G, Montgomery NA, Kanibolotsky AL, Ruseckas A, Perepichka IF, Skabara PJ et al. Laser characteristics of a family of benzene-cored star-shaped oligofluorenes. Semiconductor Science and Technology. 2012 Sep 1;27(9). 094005. https://doi.org/10.1088/0268-1242/27/9/094005