Jpn. J. Appl. Phys. 35 (1996) pp. L1673-L1676  |Next Article|  |Table of Contents|
|Full Text PDF (591K)| |Buy This Article|

Blue Electroluminescence of Substituted Polyacetylenes

Runguang Sun, Toshio Masuda¹ and Takayoshi Kobayashi

(Received November 5, 1996; accepted for publication November 13, 1996)

We report blue emission from a series of alkyl and phenyl disubstituted polyacetylenes, i.e., poly(1-phenyl-1-alkynes) (PPhAs), with alkyne being n-propyne, n-butyne, and n-octyne. Blue electroluminescence from PPhAs is observed by employing a cell with an ITO (indium-tin oxide) coated glass substrate/PPhA/Mg/Al structure. The color of luminescence is changed from blue-green to pure blue and the luminescence intensity is enhanced when the length of alkyl side chain increases, while neither an alkyl nor a phenyl monosubstituted polyacetylene shows an intense luminescence. The electroluminescence efficiency of PPhAs is not efficiently improved by doping with a common electron-transporting material 2-(4-biphenylyl)-5-(4- t-butylphenyl)-1,3,4-oxadiazole (PBD).

URL: http://jjap.jsap.jp/link?JJAP/35/L1673/
DOI: 10.1143/JJAP.35.L1673

References | Citing Articles (17)

1. Y. Ohmori, M. Uchida, K. Muro and K. Yoshino: Jpn. J. Appl. Phys. 30 (1991) L1941[JSAP].
2. G. Grem, G. Leditzky, B. Ullrich and G. Leising: Adv. Mater. 4 (1992) 36.
3. M. Granstrom and O. Inganas: Appl. Phys. Lett. 68 (1996) 147[AIP Scitation].
4. B. Hu, Z. Yang and F. E. Karasz: J. Appl. Phys. 76 (1994) 2419[AIP Scitation].
5. J. Kido, K. Hongawa, K. Okuyama and K. Nagai: Appl. Phys. Lett. 63 (1993) 2627[AIP Scitation].
6. S. Tasch, A. Niko, G. Leising and U. Scherf: Appl. Phys. Lett. 68 (1996) 1090[AIP Scitation].
7. K. Tada, M. Onoda, M. Hirohata, T. Kawai and K. Yoshino: Jpn. J. Appl. Phys. 35 (1996) L251[JSAP].
8. T. Msuda: The Chemistry of Triple-Bonded Functional Groups, ed. S. Patai (John Wiley & Sons Ltd, Chichester, 1994) p. 965, and the references therein.
9. R. Sun, T. Masuda and T. Kobayashi: Jpn. J. Appl. Phys. 35 (1996) 1434[JSAP].
10. K. Tada, R. Hidayat, M. Hirohata, M. Teraguchi, T. Masuda and K. Yoshino: Jpn. J. Appl. Phys. 35 (1996) L1138[JSAP].
11. T. Masuda, T. Takahashi and T. Higashimura: Macromolecules 18 (1985) 311.
12. C. W. Tang and S. A. VanS lyke: Appl. Phys. Lett. 51 (1987) 913[AIP Scitation].
13. J. H. Burroughes, D. D. C. Bradley, A. R. Brown, R. N. Marks, K. Mackay, R. H. Friend, P. L. Burn and A. B. Holmes: Nature 347 (1990) 539[CrossRef].
14. R. Sun, T. Masuda and T. Kobayashi: unpublished results.
15. Y. Ohmori, M. Uchida, K. Muro and K. Yoshino: Jpn. J. Appl. Phys. 30 (1991) L1938[JSAP].
16. N. C. Greenham, I. D. W. Samuel, G. R. Hayes, R. T. Philips, Y. A. R. R. Kessener, S. C. Moratti, A. B. Holmes and R. H. Friend: Chem. Phys. Lett. 241 (1995) 89[CrossRef].
17. L. Lauchlan, S. Etemad, T.-C. Chung, A. J. Heeger and A. G. MacDiarmid: Phys. Rev. B 24 (1981) 3701[APS].
18. J. Kido, H. Shionoya and K. Nagai: Appl. Phys. Lett. 67 (1995) 2281[AIP Scitation].
19. C. Adachi, T. Tsutsui and S. Saito: Appl. Phys. Lett. 56 (1990) 799[AIP Scitation].
20. A. R. Brown, D. D. C. Bradley, J. H. Burroughes, R. H. Friend, N. C. Greenham, P. L. Burn, A. B. Holmes and A. Kraft: Appl. Phys. Lett. 61 (1992) 2793[AIP Scitation].
21. M. Yoshida, H. Kawahara, A. Fujii,Y. Ohmori and K. Yoshino: Jpn. J. Appl. Phys. 34 (1995) L1237[JSAP].
22. C. Adachi, T. Tsutsui and S. Saito: Appl. Phys. Lett. 55 (1989) 1489[AIP Scitation].
23. B. E. Kohler: Conjugated Polymers, eds. J. L. Bredas and R. Silbey (Kluwar, Dordrecht, 1991) p. 405.
24. R. H. Friend, D. D. C. Bradley and P. D. Townsend: J. Phys. D 20 (1987) 1367[IoP STACKS].