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Korean Society of Photoscience (한국광과학회)
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A Streak Camera Study of Amplified Spontaneous Emission in Polyfluorene Thin Film

  • Received : 2015.09.08
  • Accepted : 2015.11.09
  • Published : 2015.12.31
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Abstract

We report on the photoluminescence (PL) properties of poly[2,7-(9-9-dioctylfluorene)] (PF) thin film under strong optical pumping using a streak camera system. When the excitation energy density increases above $72{\mu}J{\cdot}cm^{-2}$, the emission spectrum becomes narrower and PL decay curve comes to be faster simultaneously. These behaviors are clear evidence of Amplified Spontaneous Emission (ASE) due to a waveguided Stimulated Emission in slab structure of thin film. ASE threshold of $72{\mu}J{\cdot}cm^{-2}$ is comparable with previous reports and PF is attractive as a gain medium for plastic lasers.

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References

  1. Burroughes, J. H.; Bradley, D. D. C.; Brown, A. R.; Marks, R. N.; MacKay, K.; Friend, R. H.; Burn, P. L.; Holmes, A. B. Nature 1990, 347, 539-541. https://doi.org/10.1038/347539a0
  2. Kraft, A.; Grimdale, A. C.; Holmes, A. B. Angew. Chem., Int. Ed. 1998, 37, 402-428. https://doi.org/10.1002/(SICI)1521-3773(19980302)37:4<402::AID-ANIE402>3.0.CO;2-9
  3. Braun, D.; Heeger, A. J. Appl. Phys. Lett. 1991, 58, 1982-1984. https://doi.org/10.1063/1.105039
  4. Friend, R. H.; Gymer, R. W.; Holmes, A. B.; Burronghes, J. H.; Marks, R. N.; Taliani, C.; Bradley, D. D. C.; Dos Santos, D. A.; Bredas, J. L.; Logdlund, M.; Salaneck, W. R. Nature 1999, 397, 121-128. https://doi.org/10.1038/16393
  5. Samuel, D. W.; Turnbull, G. A. Chem. Rev. 2007, 107, 1272-1279. https://doi.org/10.1021/cr050152i
  6. Scherf, U.; List, E. J. W. Adv. Mater. 2002, 14, 477-487. https://doi.org/10.1002/1521-4095(20020404)14:7<477::AID-ADMA477>3.0.CO;2-9
  7. Pei, Q.; Yang, Y. J. Am. Chem. Soc. 1996, 188, 7416-7417.
  8. Chen, X.; Liao, J. I.; Liang, Y.; Ahmed, M. O.; Tseng, H.-E.; Chen, S.-A. J. Am. Chem. Soc. 2003, 125, 636-637. https://doi.org/10.1021/ja0211151
  9. Chua, L.-L.; Zaumseil, J.; Chang, J.-F.; Ou, E.C.-W.; Ho, P.K.-H.; Sirringhaus, H.; Friend, R.H. Nature 2005, 434, 194-199. https://doi.org/10.1038/nature03376
  10. Xia, R.; Heliotis, G.; Hou, Y.; Bradley, D. D. C. Org. Electron. 2003, 4, 165-177. https://doi.org/10.1016/j.orgel.2003.08.009
  11. Li, J. Y.; Laquai, F.; Wegner, G. Chem. Phys. Lett. 2009, 478, 37-41. https://doi.org/10.1016/j.cplett.2009.07.028
  12. Liu, X.; Py, C.; Tao, Y.; Li, Y.; Ding, J.; Day, M. Appl. Phys. Lett. 2004, 84, 2727-2729. https://doi.org/10.1063/1.1699479
  13. Wang, S.M.; Liua, X.Y.; Wang, L.J.; Li, W.L.; Lee, S.T. Thin Solid Films 2000, 363, 182-184. https://doi.org/10.1016/S0040-6090(99)00992-X
  14. Cheon, C. H.; Joo, S.-H.; Kim, K.; Jin, J.-I.; Shin, H.-W.; Kim, Y.-R. Macromolecules 2005, 38, 6336-6345. https://doi.org/10.1021/ma047947w
  15. Shin, H.-W.; Shin, E.-J.; Cho, S. Y.; Oh,S.-L.; Kim, Y.-R. J. Phys. Chem. C 2007, 111, 15391-15396. https://doi.org/10.1021/jp074203m
  16. Shin, H.-W.; Cho, S. Y.; Choi, K.-H.; Oh,S.-L.; Kim, Y.-R. Appl. Phys. Lett. 2006, 88, 2631122.
  17. Heliotis, G.; Bradley, D. D. C.; Turnbull, G. A.; Samuel, I. D. W. Appl. Phys. Lett. 2002, 81, 415-417. https://doi.org/10.1063/1.1494473