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Organic white-light emitting element

An organic light-emitting element, white light technology, applied in electrical elements, electro-solid devices, semiconductor devices, etc., can solve the problems of charge transport barriers, low luminous efficiency, high operating voltage of organic light-emitting elements, etc., to achieve the effect of improving convenience

Inactive Publication Date: 2010-12-29
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in a white light organic light-emitting device with multiple light-emitting layers, where the light-emitting layers are all composed of the same light-emitting host material, there will be problems as described above between the adjacent hole transport layer or electron transport layer, or Between the two, there is an obstacle to charge transport, which leads to the disadvantages of high operating voltage and low luminous efficiency of the organic light-emitting device.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] In Example 1, the ingredients contained in B1, B2, Y1, and Y2 are as follows:

[0066] B1: the main luminescent material 4CzPBP, the first transition metal organic complex FIrpic and the carrier transport material TCTA, the weight ratio of each component is 75:15:10.

[0067] Y1: the main luminescent material 4CzPBP, the second transition metal organic complex PO-01 and the carrier transport material TCTA, the weight ratio of each component is 85:5:10.

[0068] Y2: the main luminescent material PPT, the second transition metal organic complex PO-01 and the carrier transport material TCTA, the weight ratio of each component is 85:5:10.

[0069] B2: the main luminescent material PPT, the first transition metal organic complex FIrpic and the carrier transport material TCTA, the weight ratio of each component is 75:15:10.

[0070] And prepare the white light organic light-emitting element of the present invention according to the following process.

[0071] Form 150 nanom...

Embodiment 2

[0075] In Example 2, the ingredients included in B1, B2, Y1, and Y2 are as follows:

[0076] B1: the main luminescent material 4CzPBP, the first transition metal organic complex FIrpic and the carrier transport material TCTA, the weight ratio of each component is 75:15:10.

[0077] Y1: the main luminescent material 4CzPBP, and the second transition metal organic complex PO-01, the weight ratio of each component is 95:5.

[0078] Y2: the main luminescent material PPT, and the second transition metal organic complex PO-01, the weight ratio of each component is 95:5.

[0079] B2: the main luminescent material PPT, the first transition metal organic complex FIrpic and the carrier transport material TCTA, the weight ratio of each component is 75:15:10.

[0080] In addition, the white light organic light-emitting element of Example 2 was prepared according to the procedure described in Example 1.

[0081] In this embodiment, the light-emitting layer B1-Y1-Y2-B2 is composed of blue...

Embodiment 3

[0083] In Example 3, the ingredients included in B1, B2, and Y1 are as follows:

[0084] B1: the main luminescent material 4CzPBP, the first transition metal organic complex FIrpic and the carrier transport material TCTA, the weight ratio of each component is 75:15:10.

[0085] Y1: the second transition metal organic complex PO-01.

[0086] B2: the main luminescent material PPT, the first transition metal organic complex FIrpic and the carrier transport material TCTA, the weight ratio of each component is 75:15:10.

[0087] In addition, the white light organic light-emitting element of Example 3 was prepared according to the procedure described in Example 1, wherein the thickness of the Y1 layer was 0.1 nm. In this embodiment, the light-emitting layer B1-Y1-B2 is composed of three layers of blue-yellow-blue. The component brightness is 1000cd / m 2 Table 2 shows the test results of current efficiency and operating voltage, and the white light chromaticity coordinate system of...

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Abstract

The invention discloses an organic white-light emitting element which comprises an anode, a hole transport layer, a first light emitting layer, a second light emitting layer, a third light emitting layer, an electronic transport layer and a cathode, wherein the second light emitting layer is formed between the first and the third light emitting layers; the wavelength of the light emitted by the second light emitting layer is longer than that of the light emitted by the first and the third light emitting layers; and the main light emitting materials of the first and the third light emitting layers are different. The organic white-light emitting element can effectively promote light emitting efficiency, decrease control voltage and provide color stability.

Description

【Technical field】 [0001] The present invention relates to an organic light-emitting element, in particular to a white light organic light-emitting element that can effectively improve luminous efficiency, reduce operating voltage, and provide color stability. 【Background technique】 [0002] The light-emitting layer of the phosphorescent organic light-emitting element is generally mixed with a light-emitting host material (host) with a high-efficiency light-emitting guest material (guest), so as to achieve the purpose of improving the light-emitting efficiency of the element and adjusting light color. Typically, phosphorescent guest materials consist of organic complexes with transition metals. [0003] In phosphorescent organic light-emitting devices, the energy level of the triplet state of the light-emitting host material must be greater than that of the light-emitting guest material (refer to Ref. Molecularly, the efficiency of the device is reduced. Especially in the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54
Inventor 李孟庭朱妙采
Owner IND TECH RES INST