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Organic light-emitting device and production method thereof

An electroluminescent device and electroluminescent technology, which are applied in the fields of electro-solid devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problems of reduced luminous efficiency, low probability of exciton recombination, and low electron transfer rate.

Inactive Publication Date: 2015-05-20
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, in the existing organic electroluminescent devices, the electron injection layer is one of the important functional layers. During the manufacturing process, due to the poor ability of the material selected for the electron injection layer to isolate water and oxygen, water vapor will penetrate through cracks and affect Electrical Properties of Thin Film Transistors
At the same time, the selected material is not conducive to the injection of electrons, so the transport rate of electrons is low, which is two or three orders of magnitude lower than the transport rate of holes. The area is not in the light-emitting area, so that the luminous efficiency is reduced

Method used

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  • Organic light-emitting device and production method thereof
  • Organic light-emitting device and production method thereof

Examples

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Effect test

preparation example Construction

[0031] The method for preparing the above-mentioned organic electroluminescent device specifically includes the following steps:

[0032] 1. Rinse the glass with distilled water and ethanol, and soak it in isopropanol overnight.

[0033] 2. Prepare a conductive anode film on the glass cleaned in the above steps to obtain an anode conductive substrate, and then vapor-deposit sequentially on the anode conductive substrate to prepare a hole injection layer, a hole transport layer, a light-emitting layer, and an electron transport layer.

[0034] 3. Next, an electron injection layer is prepared on the above-mentioned electron transport layer, and the electron injection layer is composed of a first metal layer, a ternary doped layer and a second metal layer.

[0035] Firstly, the first metal layer is a low work function metal with a thickness of 10-30nm by thermal resistance evaporation, and the material is magnesium (Mg), strontium (Sr), calcium (Ca) or ytterbium (Yb), and the wor...

Embodiment 1

[0050] Such as figure 1 As shown, the organic electroluminescent device in this embodiment is a layered structure, and each layer is in turn:

[0051] Anode conductive substrate 101 of glass / IZO, MoO 3 The hole injection layer 102 made of TAPC material, the hole transport layer 103 made of TAPC material, the light emitting layer 104 made of BCzVBi material, the electron transport layer 105 made of TPBI material, the first metal layer 106 made of Mg material, RbNO 3 : Re 2 o 7 :Na 2 The ternary doped layer 107 made of S, the second metal layer 108 made of Ca, and the cathode layer 109 made of Ag. The first metal layer 106 , the ternary doped layer 107 and the second metal layer 108 form an electron injection layer. (wherein the slash " / " indicates a layered structure, and the colon ":" indicates mutual doping).

[0052] The above-mentioned organic electroluminescent device is prepared according to the following steps in sequence:

[0053] 1. Rinse the glass with distille...

Embodiment 2

[0066] The layered structure of the organic electroluminescent device of the following examples 2-4 is basically the same as that of the example 1, so no illustration will be given here.

[0067] The organic electroluminescent device in this embodiment is a layered structure, and each layer is sequentially:

[0068] Anode conductive substrate of glass / IZO, MoO 3 The hole injection layer made of TAPC material, the hole transport layer made of TAPC material, the light emitting layer made of DCJTB material, the electron transport layer made of TPBI material, the first metal layer made of Sr material, Rb 2 CO 3 :ReO 2 A ternary doped layer made of ZnS, a second metal layer made of Yb and a cathode layer made of Ag. The passivation layer, the rubidium compound doped layer and the rhenium compound layer constitute the electron injection layer. (wherein the slash " / " indicates a layered structure, and the colon ":" indicates mutual doping).

[0069] The above-mentioned organic e...

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Abstract

The invention relates to an organic light-emitting device and a production method thereof. The organic light-emitting device is of a layered structure and comprises an anode conducting substrate, a hole injection layer, a hole transmission layer, a light-emitting layer, an electron transmission layer, an electron injection layer and a cathode layer which are stacked in sequence; the electron injection layer comprises a first metal layer, a ternary doping layer and a second metal layer; the first metal layer is formed by low-work function metal made of materials of magnesium, strontium and calcium or ytterbium, and work function ranges from -2.0eV to -3.5eV. The first metal layer in the electron injection layer is formed by the low-work function metal which is relatively action, free electrons can move greatly, conductivity of the device can be improved, transmission speed of the electrons is increased, and the ternary doping layer is formed by a rhenium compound, a rubidium compound and a metal sulfide compound.

Description

technical field [0001] The invention relates to the field of optoelectronic devices, in particular to an organic electroluminescent device. The invention also relates to a preparation method of the organic electroluminescent device. Background technique [0002] In 1987, C.W.Tang and Van Slyke of Eastman Kodak Company in the United States reported a breakthrough in the research of organic electroluminescence. A high-brightness, high-efficiency double-layer organic electroluminescent device (OLED) was fabricated using ultra-thin film technology, and its brightness reached 1000cd / m at 10V 2 , its luminous efficiency is 1.51lm / W, and its lifespan is more than 100 hours. [0003] However, in the existing organic electroluminescent devices, the electron injection layer is one of the important functional layers. During the manufacturing process, due to the poor ability of the material selected for the electron injection layer to isolate water and oxygen, water vapor will penetra...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54H01L51/56
Inventor 周明杰黄辉张振华王平
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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