Abstract
A novel europium complex Eu(TTA)3(CPPO)2 (1) (TTA=thenoyltrifluoroacetone, CPPO=9-[4-(diphenyl-phosphinoyl)-phenyl]-9H-carbazole) based on the phosphine oxide ligand with bipolar structure was used to fabricate double-layer devices. The strong hole injection and transport ability of 1 was proved. The luminance of 414 cd m−2 was achieved with the device configuration ITO/Eu(TTA)3(CPPO)2(40 nm)/BCP (30 nm)/Mg:Ag (BCP = 2, 9-dimethyl-4, 7-diphenyl-1, 10-phenanthroline), which is favorable among double-layer organic light emitting devices based on small molecular Eu3+ complexes. The maximum current efficiency of 2.44 cd A−1 and external quantum efficiency of 1.55% demonstrate the potential application of 1 as a promising candidate for high-efficiency, simple-structure and pure red-emitting devices.
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C.W. Tang, S.A. Vanslyke, Appl. Phys. Lett. 51, 913 (1987)
J.H. Burroughes, D.D.C. Bradley, A.R. Brown, R.N. Marks, K. MacKay, R.H. Friend, P.L. Burn, A.B. Holmes, Nature 347, 539 (1990)
J. Kido, Y. Okamoto, Chem. Rev. 102, 2357 (2002)
J. Kido, K. Nagai, Y. Okamoto, J. Alloys Compd. 192, 30 (1993)
J. Kido, H. Hayase, K. Hongawa, K. Nagai, K. Okuyama, Appl. Phys. Lett. 65, 2124 (1994)
M.D. Mcgehee, T. Bergstedt, C. Zhang, A.P. Saab, M.B. O’Regan, G.C. Bazan, V.I. Srdanov, A.J. Heeger, Adv. Mater. 11, 1349 (1999)
M.R. Robinson, M.B. O’Regan, G.C. Bazan, Chem. Commun. 1645 (2000)
C. Adachi, M.A. Baldo, S.R. Forrest, J. Appl. Phys. 87, 8049 (2000)
L. Huang, K. Wang, C. Huang, F. Li, Y. Huang, J. Mater. Chem. 11, 790 (2001)
P. Sun, J. Duan, H. Shih, C. Cheng, Appl. Phys. Lett. 81, 792 (2002)
M. Sun, H. Xin, K. Wang, Y. Zhang, L. Jin, C. Huang, Chem. Commun. 702 (2003)
P. Sun, J. Duan, J. Lih, C. Cheng, Adv. Funct. Mater. 13, 683 (2003)
Q.D. Ling, Q.J. Cai, E.T. Kang, K.G. Neoh, F.R. Zhu, W. Huang, J. Mater. Chem. 14, 1741 (2004)
X. Zhu, L. Wang, J. Ru, W. Huang, J. Fang, D. Ma, J. Mater. Chem. 14, 2732 (2004)
J. Yu, L. Zhou, H. Zhang, Y. Zheng, H. Li, R. Deng, Z. Peng, Z. Li, Inorg. Chem. 44, 1611 (2005)
M. Shi, F. Li, T. Yi, D. Zhang, H. Hu, C. Huang, Inorg. Chem. 44, 8929 (2005)
H. Xu, L. Wang, X. Zhu, K. Yin, G. Zhong, X. Hou, W. Huang, J. Phys. Chem. B 110, 3023 (2006)
F. Liang, Q. Zhou, Y. Cheng, L. Wang, D. Ma, X. Jing, F. Wang, Chem. Mater. 15, 1935 (2003)
W.G. Quirino, R.D. Adati, S.A.M. Lima, C. Legnani, M. Jafelicci Jr., M.R. Davolos, M. Cremona, Thin Solid Films 515, 927 (2006)
K. Okada, Y.-F. Wang, T. Nakaya, Synth. Met. 97, 113 (1998)
Y.J. Fu, T.K.S. Wong, Y.K. Yan, G.M. Wang, X. Hu, Thin Solid Films 417, 78 (2002)
J.-B. Peng, N. Takada, N. Minami, Thin Solid Films 405, 224 (2002)
N.A.H. Male, O.V. Salata, V. Christou, Synth. Met. 126, 7 (2002)
H. Xu, K. Yin, W. Huang, Chem. Eur. J. 13, 10281 (2007)
H. Xu, K. Yin, W. Huang, Chem. Phys. Chem. 9, 1752 (2008)
L.R. Melby, N.J. Rose, E. Abranmson, J.C. Caris, J. Am. Chem. Soc. 86, 5117 (1964)
R. Reyes, E.N. Hering, M. Cremona, C.F.B. da Silva, H.F. Brito, C.A. Achete, Thin Solid Films 420–421, 23 (2002)
M.-H. Ha-Thi, V. Souchon, A. Hamdi, R. Metivier, V. Alain, K. Nakatani, P.G. Lacroix, J.-P. Genet, V. Michelet, I. Leray, Chem. Eur. J. 12, 9056 (2006)
H. Xin, F.Y. Li, M. Guan, C.H. Huang, M. Sun, K.Z. Wang, Y.A. Zhang, L.P. Jin, J. Appl. Phys. 94, 4729 (2003)
C. Hosokawa, H. Tokailin, H. Higashi, T. Kusumoto, Appl. Phys. Lett. 60, 1220 (1992)
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Yin, K., Xu, H., Zhong, G. et al. Highly improved electroluminescence from double-layer devices based on a carbazole-functionalized europium3+ complex. Appl. Phys. A 95, 595–600 (2009). https://doi.org/10.1007/s00339-008-4963-7
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DOI: https://doi.org/10.1007/s00339-008-4963-7