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High-contrast and high-efficiency top-emitting organic light-emitting devices

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Abstract

The reflection properties of top-emitting organic light-emitting devices with different electrodes and organic layers were calculated. The results guided the fabrication of a high-contrast device: Au/copper phthalocyanine (CuPc: 35 nm)/N,N’-bis-(1-naphthyl)-N,N’diphenyl-1,1’ biphenyl-4,4’diamine (NPB: 15 nm)/tris(8-hydroxyquinoline) aluminum (Alq3: 50 nm)/Sm (35 nm)/Alq3 (65 nm). The device has a contrast ratio of 8.3:1 at a luminance of 300 cd/m2 under 1000 lx ambient light, and a maximum luminance and efficiency of 5000 cd/m2 and 4.14 cd/A, respectively. The high contrast is attributed to the moderate reflection of Au at 380–550 nm, low reflection of Sm in the visible range, and high absorption of CuPc at 600–700 nm.

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Authors and Affiliations

  1. Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, P.R. China

    W.F. Xie, H.Y. Sun, C.W. Law, C.S. Lee & S.T. Lee

  2. National Laboratory of Integrated Optoelectronics, Jilin University, Changchun, 130012, P.R. China

    W.F. Xie & S.Y. Liu

Authors
  1. W.F. Xie
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  2. H.Y. Sun
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  3. C.W. Law
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  4. C.S. Lee
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  5. S.T. Lee
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  6. S.Y. Liu
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Corresponding author

Correspondence to S.T. Lee.

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PACS

85.60.Jb; 78.20.Ci; 78.40.-q

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Xie, W., Sun, H., Law, C. et al. High-contrast and high-efficiency top-emitting organic light-emitting devices. Appl. Phys. A 85, 95–97 (2006). https://doi.org/10.1007/s00339-006-3662-5

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  • DOI: https://doi.org/10.1007/s00339-006-3662-5

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