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New insert layer structure OLEDs

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Abstract

An insert layer structure organic electroluminescent device(OLED) based on a new luminescent material (Zn(salen)) is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn(salen)/Liq/LiF/Al/CuPc/NPD/Zn(salen)/Liq/LiF/Al. Effective insert electrode layers comprising LiF(1 nm)/Al(5 nm) are used as a single semitransparent mirror, and bilayer cathode LiF(1 nm)/Al(100 nm) is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.

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Authors and Affiliations

  1. Department of Physics, Taiyuan University of Technology, Taiyuan, 030024, China

    Zhi-xiang Gao, Yu-ying Hao & Jun-feng Lei

  2. College of Physics and Electronic Science, Shanxi Datong University, Datong, 037009, China

    Zhi-xiang Gao

  3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, 030024, China

    Cheng Ma & Bing-she Xu

Authors
  1. Zhi-xiang Gao
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  2. Yu-ying Hao
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  3. Jun-feng Lei
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  4. Cheng Ma
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  5. Bing-she Xu
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Corresponding author

Correspondence to Yu-ying Hao.

Additional information

This work was supported by the National Natural Science Foundation of China (no. 20671068 and 20471041)

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Gao, Zx., Hao, Yy., Lei, Jf. et al. New insert layer structure OLEDs. Optoelectron. Lett. 4, 209–212 (2008). https://doi.org/10.1007/s11801-008-7125-4

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  • DOI: https://doi.org/10.1007/s11801-008-7125-4

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