Acta Optica Sinica, Volume. 31, Issue 6, 631002(2011)

Analysis of Light Out-Coupling Efficiency in Top-Emitting Polymer Light-Emitting Devices

Gui Yuchang1、*, Wen Shangsheng1,2, Zhang Jianping1, Wang Baozheng1, and Zhao Baofeng1
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  • 1[in Chinese]
  • 2[in Chinese]
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    The light out-coupling efficiency of top-emitting polymer light-emitting devices (TEPLED) based on poly [2-me-thoxy-5-(2-ethyl-hexyloxy)-1, 4-phenylenevinylene] (MEH-PPV) is simulated by applying the transfer matrix method and software Matlab. The influence of anode materials, cathode materials, capping layers and observing angle on the performance of the TEPLED′s out-coupling efficiency is studied. When compared with Ag film anode device, the one based on distributed Bragg reflector (DBR) presents higher out-coupling efficiency, reaching 47.43%. To decrease the light absorption and reflection by sub-transparent metal, transparent materials cathode is designed so that the light-coupling efficiency raises about 10% compared with Ag anode devices, reaches 67.11%. The influence of DBR on the observing angles of total TEPLED is studied. The results show that it has little effect on light-coupling efficiency of TEPLED by DBR when the observing angle changes in a narrow range (30°). It has more effect on light-coupling efficiency when the observing angle is more than 30°. The application of DBR provides a theoretical basis for the optimization of out-coupling efficiency of TEPLED.

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    Gui Yuchang, Wen Shangsheng, Zhang Jianping, Wang Baozheng, Zhao Baofeng. Analysis of Light Out-Coupling Efficiency in Top-Emitting Polymer Light-Emitting Devices[J]. Acta Optica Sinica, 2011, 31(6): 631002

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    Paper Information

    Category: Thin Films

    Received: Dec. 29, 2010

    Accepted: --

    Published Online: May. 27, 2011

    The Author Email: Yuchang Gui (gycscut@163.com)

    DOI:10.3788/aos201131.0631002

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