Organic electroluminescent device preparation method, organic electroluminescent device and display device

Organic electroluminescent device preparation method, organic electroluminescent device and display device

  • CN 108,417,735 B
  • Filed: 01/19/2018
  • Issued: 07/07/2020
  • Est. Priority Date: 01/19/2018
  • Status: Active Grant
First Claim
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1. A preparation method of an organic electroluminescent device is characterized by comprising the step of forming an organic light-emitting diode, and specifically comprises the following steps:

  • s1, forming a first electrode, an organic functional layer and a second electrode which are arranged in a stacked mode on the substrate, wherein the organic functional layer comprises at least two monochromatic light emitting layers;

    the first electrode and/or the second electrode are/is a light emitting electrode;

    s2, adjusting the thickness of the light-emitting electrode;

    wherein, S2, the step of adjusting the thickness of the light-emitting electrode includes;

    s2.1, calculating the length value of the microcavity corresponding to each monochromatic light emitting layer, and selecting the length value of the alternative microcavity corresponding to each monochromatic light emitting layer;

    s2.2, judging whether the length value of each alternative microcavity meets a preset condition or not to obtain the length value of the selected microcavity corresponding to each monochromatic light emitting layer;

    s2.3, calculating the average value of the micro-cavities according to the length values of the selected micro-cavities, and selecting the length value of the total micro-cavity according to the average value of the micro-cavities;

    s2.4, adjusting the thickness of the light-emitting electrode to enable the total thickness of the organic functional layer and the light-emitting electrode to reach the total microcavity length value;

    wherein, the step S2.2 comprises;

    judging whether the difference value between the maximum value and the minimum value in the length values of the alternative microcavities corresponding to the monochromatic light emitting layers meets a preset critical value or less;

    if the length value of the alternative microcavity is not satisfied, reselecting the length value of the alternative microcavity, and performing next judgment;

    when the conditions are met, obtaining the length value of the selected microcavity corresponding to each monochromatic light emitting layer;

    step S2.3, comprising;

    calculating the length value of each selected microcavity to obtain the average value of the microcavity, and selecting any value from the average value of the microcavity, namely the range from the first threshold value to the average value of the microcavity and the second threshold value, as the length value of the total microcavity according to a preset first threshold value and a preset second threshold value.

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