Top emission white organic electroluminescent device and preparation method thereof

An electroluminescent device and top emission technology, which is applied in the fields of electro-solid devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve problems such as poor visual angle characteristics, narrow spectrum, and difficulty in obtaining top-emitting white light devices. Good color stability and good angle characteristics

Inactive Publication Date: 2013-06-19
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the microcavity effect, top-emitting white light devices are relatively difficult to obtain
At present, the main method of preparing top-emitting white light devices is to use double-emitting layers or three-primary-color light-emitting layers, but these white light devices have certain problems, such as: narrow spectrum, easy drift of chromaticity with increasing voltage, and visual angle characteristics not good

Method used

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  • Top emission white organic electroluminescent device and preparation method thereof
  • Top emission white organic electroluminescent device and preparation method thereof
  • Top emission white organic electroluminescent device and preparation method thereof

Examples

Experimental program
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Embodiment Construction

[0024] Below in conjunction with accompanying drawing, example is further described.

[0025] Such as figure 1 As shown, in this example, the blue fluorescent material DSA-Ph is used as a single-emitting layer top-emitting white light organic electroluminescent device, which includes a substrate 1, a reflective anode 2, a hole injection layer 3, a hole transport layer 4, a single light-emitting layer Layer 5, electron transport layer 6, electron injection layer 7, translucent metal cathode 8, wherein the single light-emitting layer is made of blue light host material TBADN doped with 3.0wt% blue light material DSA-Ph.

[0026] Specifically, the detailed steps and processes of the preparation method of the top-emitting white light organic electroluminescence light-emitting device with this device structure are as follows:

[0027] a) Select the glass substrate 1 that meets the required size, and its effective area is 5mm×5mm. The glass slices were baked under a high-pressure...

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Abstract

The invention relates to a top emission white organic electroluminescent device and a preparation method thereof. The top emission white organic electroluminescent device comprises a substrate, a reflection anode, an electron hole injection layer, an electron hole transmission layer, a single luminous layer, an electron transmission layer, an electron injection layer and a semitransparent metallic cathode, wherein the single luminous layer is composed of host materials and blue object materials. The top emission white organic electroluminescent device and the preparation method thereof obtain a specific resonance wavelength and appropriate micro cavity effects by appropriately adjusting the thickness of the electron hole transmission layer so as to obtain a top emission white light device which is wide in light spectrum, stable in color, and good in angle character, and are characterized in that the device is simple in structure and low in cost, and simultaneously solves the general problems existing in a general top emission white light device of narrow light spectrum, color drifting, poor angle characters an the like.

Description

technical field [0001] The invention relates to a top-emitting white light organic electroluminescent device and a preparation method thereof. Background technique [0002] Organic Light Emitting Device (OLED) has low cost, all solid state, active light emission, high brightness, wide viewing angle, thin thickness, low voltage DC drive, low power consumption, wide operating temperature range, and can realize soft screen Lighting and other characteristics, widely used in flat panel displays, backlight modules and lighting and other fields, known as a new generation of energy-saving and environmentally friendly lighting technology. [0003] The top-emitting organic electroluminescent device is different from the traditional bottom-emitting device. It has a highly reflective anode and a semi-transparent cathode, thereby forming an optical microcavity between the two electrodes, and light is emitted from the top electrode. The microcavity effect mainly means that the photon den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/56
Inventor 朱文清李佳珩孙文兵吴晓亮魏娜
Owner SHANGHAI UNIV
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