Chin. J. Semicond. > 2006, Volume 27 > Issue 1 > 30-34

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Electron Injection Enhancement by Diamond-Like Carbon Film in Polymer Electroluminescence Devices

Li Hongjian, Yan Lingling, Huang Baiyun, Yi Danqing, Hu Jin, He Yingxuan and Peng Jingcui

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Abstract: A diamond-like carbon (DLC) film is deposited as an electron injection layer between the polymer light-emitting layer(MEH-PPV) and aluminum (Al) cathode electrode in polymer electroluminescence devices (PLEDs) using a radio frequency plasma deposition system.The source material of the DLC is n-butylamine.The devices consist of indium tin oxide (ITO)/MEH-PPV/DLC/Al.Electron injection properties are investigated through I-V characteristics,and the mechanism of electron injection enhancement due to a thin DLC layer has been studied.It is found that:(1) a DLC layer thinner than 1.0nm leads to a higher turn-on voltage and decreased electroluminescent (EL) efficiency;(2) a 5.0nm DLC layer significantly enhances the electron injection and results in the lowest turn-on voltage and the highest EL efficiency;(3) DLC layer that exceeds 5.0nm results in poor device performance;and(4) EL emission can hardly be detected when the layer exceeds 10.0nm.The properties of ITO/MEH-PPV/DLC/Al and ITO/MEH-PPV/LiF/Al are investigated comparatively.

Key words: diamond-like carbonpolymer electroluminescence deviceelectron injection enhancement

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    Received: 20 August 2015 Revised: Online: Published: 01 January 2006

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      Li Hongjian, Yan Lingling, Huang Baiyun, Yi Danqing, Hu Jin, He Yingxuan, Peng Jingcui. Electron Injection Enhancement by Diamond-Like Carbon Film in Polymer Electroluminescence Devices[J]. Journal of Semiconductors, 2006, In Press. Li H J, Yan L L, Huang B Y, Yi D Q, Hu J, He Y X, Peng J C. Electron Injection Enhancement by Diamond-Like Carbon Film in Polymer Electroluminescence Devices[J]. Chin. J. Semicond., 2006, 27(1): 30.Export: BibTex EndNote
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      Li Hongjian, Yan Lingling, Huang Baiyun, Yi Danqing, Hu Jin, He Yingxuan, Peng Jingcui. Electron Injection Enhancement by Diamond-Like Carbon Film in Polymer Electroluminescence Devices[J]. Journal of Semiconductors, 2006, In Press.

      Li H J, Yan L L, Huang B Y, Yi D Q, Hu J, He Y X, Peng J C. Electron Injection Enhancement by Diamond-Like Carbon Film in Polymer Electroluminescence Devices[J]. Chin. J. Semicond., 2006, 27(1): 30.
      Export: BibTex EndNote

      Electron Injection Enhancement by Diamond-Like Carbon Film in Polymer Electroluminescence Devices

      • Received Date: 2015-08-20

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