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Vacuum Annealing of White-Light Organic Light-Emitting Devices with Polyfluorene Copolymer as Light-Emitting Layer
Corresponding Author(s) : Hua Wang
Asian Journal of Chemistry,
Vol. 26 No. 4 (2014): Vol 26 Issue 4
Abstract
White-light organic light-emitting devices (OLEDs) were fabricated, in which poly(9,9-dioctyl)fluorene with insertion of 4,7-bithienyl-2,1,3-benzothiadiazole (PFO-DBT5) were utilized as light-emitting layer. During fabrication of white-light OLED, PFO-DBT5 films were vacuum annealed under four different temperatures, respectively. Then, the relationship between vacuum annealing of PFO-DBT5 films and performance of white-light organic light-emitting device was studied by atomic force microscope observation and electroluminescence properties characterization. It was concluded that degree of stacking order and the inter-chain distance and of PFO-DBT chains influence device performance directly; the optimal vacuum annealing temperature was gained to be 100 ºC by comparison experiments.
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- J.X. Jiang, Y.H. Xu, W. Yang, R. Guan, Z.Q. Liu, H.Y. Zhen and Y. Cao, Adv. Mater., 18, 1769 (2006); doi:10.1002/adma.200502740.
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- E. Bundgaard and F.C. Krebs, Macromolecules, 39, 2823 (2006); doi:10.1021/ma052683e.
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References
J.X. Jiang, Y.H. Xu, W. Yang, R. Guan, Z.Q. Liu, H.Y. Zhen and Y. Cao, Adv. Mater., 18, 1769 (2006); doi:10.1002/adma.200502740.
Q. Hou, Y.S. Xu, W. Yang, M. Yuan, J.B. Peng and Y. Cao, J. Mater. Chem., 12, 2887 (2002); doi:10.1039/b203862e.
V. Misra and H. Mishra, J. Phys. Chem. B, 112, 4213 (2008); doi:10.1021/jp0769577.
Y. Kawamura, J. Brooks, J. Brown, H. Sasabe and C. Adachi, Phys. Rev. Lett., 96, 017404 (2006); doi:10.1103/PhysRevLett.96.017404.
T. Virgili, D.G. Lidzey and D.D.C. Bradley, Adv. Mater., 12, 58 (2000);doi:10.1002/(SICI)1521-4095(200001)12:1<58::AID-ADMA58>3.0.CO;2-E.
B.P. Lyons, K.S. Wong and A.P. Monkman, J. Chem. Phys., 118, 4707 (2003); doi:10.1063/1.1545098.
F.B. Dias, J. Morgado, A.L. Maçanita, F.P. da Costa, H.D. Burrows and A.P. Monkman, Macromolecules, 39, 5854 (2006); doi:10.1021/ma0602932.
D.W. Bright, F. Galbrecht, U. Scherf and A.P. Monkman, Macromolecules, 43, 7860 (2010); doi:10.1021/ma101570u.
M. Knaapila, H.L. Vaughan, T.P.A. Hase, R.C. Evans, R. Stepanyan, M. Torkkeli, H.D. Burrows, U. Scherf and A.P. Monkman, Macromolecules, 43, 299 (2010); doi:10.1021/ma9018069.
R. Verduzco, I. Botiz, D.L. Pickel, S.M. Kilbey II, K.L. Hong, E. Dimasi and S.B. Darling, Macromolecules, 44, 530 (2011); doi:10.1021/ma102728z.
E. Aharon, M. Kalina and G.L. Frey, J. Am. Chem. Soc., 128, 15968 (2006); doi:10.1021/ja066290m.
E. Bundgaard and F.C. Krebs, Macromolecules, 39, 2823 (2006); doi:10.1021/ma052683e.
N. Hundt, K. Palaniappan, J. Servello, D.K. Dei, M.C. Stefan and M.C. Biewer, Org. Lett., 11, 4422 (2009); doi:10.1021/ol901786z.
Z.X. Gao, Y.Y. Hao, H. Wang, Y.Q. Miao and B.S. Xu, Asian J. Chem., 25, 3297 (2013).