Browse > Article
http://dx.doi.org/10.4313/TEEM.2016.17.1.37

Performance Enhancement of Organic Light-emitting Diodes with an Electron-transport Layer of Bathocuproine  

Honga, Jin-Woong (Department of Electric Engineering, Kwangwoon University)
Guo, Yi-Wei (Department of Electric Engineering, Kwangwoon University)
Shin, Jong-Yeol (Department of Car-Mechatronics, Sahmyook University)
Kim, Tae Wan (Department of Information Display Engineering, Hongik University)
Publication Information
Transactions on Electrical and Electronic Materials / v.17, no.1, 2016 , pp. 37-40 More about this Journal
Abstract
Performance enhancement of organic light-emitting diodes (OLEDs) is investigated in a device structure of ITO/TPD/Alq3/LiF/Al and ITO/TPD/Alq3/BCP/LiF/Al. Here, bathocuproine (BCP) is used as an electron-transport layer. Current density-voltage-luminance characteristics of the OLEDs show that the performance of the device is better with BCP layer than without BCP layer. The current density, luminance, luminous efficiency, and external-quantum efficiency are improved by approximately 22%, 50%, 2%, and 18%, respectively. Since the BCP layer lowers the electron energy barrier, electron transport is facilitated and the movement of hole is blocked as the applied voltage increases. This results in an increased recombination rate of holes and electrons.
Keywords
Organic light-emitting diodes; BCP (bathocuproine); Recombination rate; Current density; Luminance; Luminous efficiency; External-quantum efficiency;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Y. Ohmori, A. Fujii, M. Uchida, and K. Yoshino, Appl. Phys. Lett., 62, 3250 (1993). [DOI: http://dx.doi.org/10.1063/1.109089]   DOI
2 C. Hosokawa, H. Higashi, and T. Kusumoto, Appl. Phys. Lett., 62, 3238 (1993). [DOI: http://dx.doi.org/10.1063/1.109085]   DOI
3 Z. L. Zhang, X. Y Jiang, X. H. Xu, T. Nagatomo, and O. Omoto, Synth. Met., 91, 131 (1997). [DOI: http://dx.doi.org/10.1016/S0379-6779(98)80073-8]   DOI
4 P. S. Vincett, W. A. Barlow, R. A. Hann, and G. G. Roberts, Thin Solid Films, 94, 171 (1982). [DOI: http://dx.doi.org/10.1016/0040-6090(82)90509-0]   DOI
5 C. W. Tang and S. A. Vanslyke, J. Appl. Phys., 65, 3610 (1989). [DOI: http://dx.doi.org/10.1063/1.343409]   DOI
6 M. Pope, H. Kallmann, and P. Magnante, J. Chem. Phys., 38, 2042 (1963). [DOI: http://dx.doi.org/10.1063/1.1733929]   DOI
7 W. Helfrich and W. G. Schneider, Phys. Rev. Lett., 140, 229 (1965). [DOI: http://dx.doi.org/10.1103/PhysRevLett.14.229]   DOI
8 C. W. Tang and S. A. VanSlyke, Appl. Phys. Lett., 51, 913 (1987). [DOI: http://dx.doi.org/10.1063/1.98799]   DOI
9 J. H. Burroughes, D. C. Bradley, A. R. Brown, R. N. Marks, K. Mackay, R. H. Friend, P. I. Burn, and A. B. Holmes, Nature, 347, 539 (1990). [DOI: http://dx.doi.org/10.1038/347539a0]   DOI
10 A. Dodabalapur, Solid State Communications, 102, 259 (1997). [DOI: http://dx.doi.org/10.1016/S0038-1098(96)00714-4]   DOI
11 S. Roy, S. Kunndu, S. K. Roy, and A. J. Pal, Materials Chemistry and Physics, 77, 784 2002. [DOI: http://dx.doi.org/10.1016/S0254-0584(02)00157-8]   DOI
12 Y. H. Lee, W. J. Kim, K. S. Cho, J. Y. Lee, T. W. Kim, and J. W. Hong, Jour. of the Korean Physical Society, 53, 1460 (2008). [DOI: http://dx.doi.org/10.3938/jkps.53.1460]   DOI
13 J. Pospisil, J. Honskus, J. Fahnrich, P. Hlidek, and P. Toman, Journal of Luminescence, 72, 522 (1997). [DOI: http://dx.doi.org/10.1016/S0022-2313(96)00362-6]   DOI
14 K. Narayan, S. Varadharajaperumal, G. Mohan Rao, M. Manoj Varma, and T. Srinivas, Curr. Appl. Phys., 13, 18 (2013). [DOI: http://dx.doi.org/10.1016/j.cap.2012.06.004]   DOI
15 H. Isii, Device Physics, Material Chemistry, and Device Application of Organic Light Emittting Diodes, Popular Ed. (CMC Publishing, 2012) p. 13.