Effect of Double Hole-Transporting Structure on Color Purity of Blue Organic Light-Emitting Diodes (BOLED)

Abstract:

A blue organic light-emitting diode (OLED) with a double hole-transporting (DHT) structure has been developed. The blue color purity was improved by modulation the thickness of CBP layer. When the thicknesses of left CBP and right CBP are respectively 8 nm and 2 nm, the more pure blue coordinates are (0.155, 0.079), which are very close to the blue coordinates of the national television system committee (NTSC) standard (0.14, 0.08). Furthermore the current density, brightness and the luminous efficiency of device with the left CBP of 8 nm and the right CBP of 2 nm are respectively 144.7 mA/cm2, 1065 cd/m2 and 0.93 cd/A.

• Periodical: Applied Mechanics and Materials (Volume 311)
• Pages: 424-429
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.311.424
• Online since: February 2013
• Authors: Kan Lin Chen, Chien Jung Huang, Zong Jin Wu, Chih Chieh Kang, Wen Ray Chen, Teen Hang Meen
• Keywords: Luminescence, Organic Light-Emitting Diode, Thin Film

References

[1] C.W. Tang, S.A. Van Slyke, Appl. Phys. Lett. 51 (1987) 913.

[2] C. Adachi, M.A. Baldo, S.R. Forrest, S. Lamansky, M.E. Thompson, R.C. Wong, Appl. Phys. Lett. 78 (2001) 1622.

[3] Y. Fukuda, T. Watanabe, T. Wakimoto, S. Miyaguchi, M. Tsuchida, Synth. Met. 1 (2000) 111.

[4] H.S. Bang, D.U. Lee, T.W. Kim, S.M. Han, J.H. Seo, Y.K. Kim, Thin Solid Films 516 (2008) 5649.

[5] G. Li, J. Shinar, Appl. Phys. Lett. 83 (2003) 5359.

[6] C. J. Huang, C. C. Kang, T. C. Lee, W. R. Chen, T. H. Meen, Journal of Luminescence 129 (2009) 1292.

[7] C. J. Huang, T. H. Meen, S. L. Wu, C. C. Kang, Display 30 (2009) 164.

[8] C. J. Huang, T. H. Meen, K. C. Liao, Y. K. Su, Journal of Physics and chemistry of Solids 70 (2009) 765.

[9] S. Y. Seo, J. T. Woo, J. H. Leem, S. H. Lee, M. Jung, D. C. Choo, H. S. Bang, T. W. Kim, S. J. Lee, J. H. Seo, Y. K. Kim, Mol. Cryst. Liq. Cryst. 514 (2009) 452.

[10] H.S. Bang, S.Y. Seo, D.C. Choo, T.W. Kim, S.J. Lee, J.H. Seo, Y.K. Kim, C. Chu, J. Ha, Thin Solid Films 517 (2009) 5314.

DOI: 10.1016/j.tsf.2009.03.104

[11] S.W. Liu, C.A. Hung, J.H. Lee, K.H. Yang, C.C. Chen, Y. Chang, Thin Solid Films 453(2004)312.

[12] Z.B. Deng, S.T. Lee, D.P. Webb, Syn. Met. 107 (1999) 107.

[13] Y. Hamada, H. Kanno, T. Tsujioka, H. Takahashi, T. Usuki, Appl. Phys. Lett. 75 (1999) 1682.

[14] C. Adachi, M.A. Baldo, S.R. Forrest, J. Appl. Phys. 87 (2000) 8049.

[15] C. Hosokawa, H. Higashi, H. Nakamura, T. Kusumoto, Appl. Phys. Lett. 67 (1995) 3853.

[16] Y. M. Shi, Z. B. Deng, D. H. Xu, J. Xiao, Displays 27 (2006) 166.

[17] B.E. Koene, D.E. Loy, M.E. Thompson, Chem. Mater. 10 (1998) 2235.

[18] H.S. Bang, S.Y. Seo, D.C. Choo, T.W. Kim, S.J. Lee, J.H. Seo, Y.K. Kim, C. Chu, J. Ha, Thin Solid Films 517 (2009) 5314.

DOI: 10.1016/j.tsf.2009.03.104

[19] H. Matsushima, S. Naka, H. Okada, H. Onnagawa, Current Applied Physics 5 (2005) 305.

[20] D.U. Lee, D.C. Choo, T.W. Kim, J.H. Seo, J.H. Park, Y.K. Kim, Thin Solid Films 517 (2009) 5326.