Improved Out-Coupling Emission of Organic Light-Emitting Diodes by Employing Ag-Thin-Film or Al2O3-Thin-Film Longitudinal Wave Guides

Article Preview

Abstract:

We improved the current efficiencies of Organic Light-emitting diodes from 50 cd/A to 77.7 and 65.4 cd/A by employing Ag-thin-film and Al2O3-thin-film longitudinal wave guides with the same device structures, respectively, which was attributed to the recycle use of the internal mode because the reflection of the thin-film longitude wave guides. In addition, the introduction of these wave guides exported slight influence on the spectra which was resulted from mode selection by the micro-cavity consisting of ITO and organic layers.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

486-491

Citation:

Online since:

December 2016

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2017 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

[1] J. Kido, M. Kimura, K. Nagai, Multilayer White Light-Emitting Organic Electroluminescent Device, Sci. 267(5202) (1995) 1332-1334.

DOI: 10.1126/science.267.5202.1332

Google Scholar

[2] B. W. D'Andrade, S. R. Forrest, White Organic Light-Emitting Devices for Solid-State Lighting, Adv. Mater. 16(18) (2004) 1585-1595.

DOI: 10.1002/adma.200400684

Google Scholar

[3] Y. Qiu, Y. D. Gao, P. Wei, L. D. Wang, Organic light-emitting diodes with improved hole-electron balance by using copper phthalocyanine/aromatic diamine multiple quantum wells, Appl. Phys. Lett. 80 (2002) 2628-2630.

DOI: 10.1063/1.1468894

Google Scholar

[4] H. Aziz, Z. D. Popovic, Study of organic light emitting devices with a 5, 6, 11, 12-tetraphenylnaphthacene (rubrene)-doped hole transport layer, Appl. Phys. Lett. 80 (2002) 2180-2182.

DOI: 10.1063/1.1455697

Google Scholar

[5] H. Aziz, Z. D. Popovic, N. X. Hu, A. M. Hor, G. Xu, Degradation mechanism of small molecule-based organic light-emitting devices, Sci. 283(5409) (1999) 1900-(1902).

DOI: 10.1126/science.283.5409.1900

Google Scholar

[6] C. Vi-En, S. Song, J. Curless, L. S. Chang, H. C. Lee, F. So, et al. Organic light-emitting diodes with a bipolar transport layer, Appl. Phys. Lett. 75(2) (1999) 172-174.

DOI: 10.1063/1.124309

Google Scholar

[7] G. M. Dong, C. S. Lee, S. T. Lee, L. S. Hung, Improved efficiency by a graded emissive region in organic light-emitting diodes, Appl. Phys. Lett. 80(19) (2002) 3641-3643.

DOI: 10.1063/1.1479450

Google Scholar

[8] S. Yan, Y. Yang, Naturally formed graded junction for organic light-emitting diodes, Appl. Phys. Lett. 83(12) (2003) 2453-2455.

DOI: 10.1063/1.1605800

Google Scholar

[9] J. J. Shiang, A. R. Duggal, Application of radiative transport theory to light extraction from organic light emitting diodes, J. Appl. Phys. 95(5) (2004) 2880-2888.

DOI: 10.1063/1.1644037

Google Scholar

[10] J. J. Shiang, T. J. Faircloth, A. R. Duggal, Experimental demonstration of increased organic light emitting device output via volumetric light scattering, J. Appl. Phys. 95(5) (2004) 2889-2895.

DOI: 10.1063/1.1644038

Google Scholar

[11] S. Moller, S. R. Forrest, Improved light out-coupling in organic light emitting diodes employing ordered microlens arrays, J. Appl. Phys. 91(5) (2002) 3324-3327.

DOI: 10.1063/1.1435422

Google Scholar

[12] G. Gu, D. Z. Garbuzov, P. E. Burrows, S. Venkatesh, S. R. Forrest, M. E. Thompson, High-external-quantum-efficiency organic light-emitting devices, Opt. Lett. 22(6) (1997) 396-398.

DOI: 10.1364/ol.22.000396

Google Scholar

[13] M. Furno, R. Meerheim, S. Hofmann, B. Lüssem, K. Leo, Efficiency and rate of spontaneous emission in organic electroluminescent devices, Phys. Rev. B : Condens. Matter Mater. Phys. 85(11) (2012) 115205.

DOI: 10.1103/physrevb.88.119905

Google Scholar

[14] J. J. Shiang, T. J. Faircloth, A. R. Duggal, Experimental demonstration of increased organic light emitting device output via volumetric light scattering, J. Appl. Phys. 95(5) (2004) 2889-2895.

DOI: 10.1063/1.1644038

Google Scholar

[15] S. Möller, S. R. Forrest, Improved light out-coupling in organic light emitting diodes employing ordered microlens arrays, J. Appl. Phys. 91(5) (2002) 3324-3327.

DOI: 10.1063/1.1435422

Google Scholar

[16] T. Tsutsui, M. Yahiro, H. Yokogawa, K. Kawano, Doubling coupling-out efficiency in organic light-emitting devices using a thin silica aerogel layer, Adv. Mater. 13(15) (2001) 1149-1152.

DOI: 10.1002/1521-4095(200108)13:15<1149::aid-adma1149>3.0.co;2-2

Google Scholar