An organic electroluminescent device

An electroluminescent device and luminescence technology, which is applied in the direction of electric solid-state devices, electrical components, semiconductor devices, etc., can solve the problems of low light extraction efficiency, achieve high luminous efficiency, high reflectivity, and improve the effect of light extraction efficiency
CN109004101AActive Publication Date: 2018-12-14NINGBO LUMILAN NEW MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGBO LUMILAN NEW MATERIAL CO LTD
Publication Date
2018-12-14

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Abstract

An organic electroluminescent device disclosed in the invention comprises a reflective electrode layer, a light emitting layer and a transmission electrode layer, wherein the reflective electrode layer comprises a reflective metal layer, a microcavity is formed between the reflective metal layer and the transmission electrode layer, and the distance d between the light emitting layer and the reflection metal layer conforms to the following formula I: [{(2m +1) / 4}- (1 / 8)]Lambda(Etad([ {(2m+1) / 4} + (1 / 8)]Lambda. Fabry-Perot microcavity enhances is formed between that reflective metal layer and the transmissive electrode layer. the selectivity of the light emitted by the device with Lambda wavelength, and improves the light extraction efficiency of the device. The resonance wave is generatedby the light wave in the micro cavity. By setting the distance between the light emitting layer and the reflecting metal layer with formula I, the light emitting layer is located at the wavefront position of the resonance wave, which effectively improves the luminous intensity of the device and further realizes the high-efficiency luminescence of the device.
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Description

technical field

[0001] The invention belongs to the field of display technology, and in particular relates to an organic electroluminescent device. Background technique

[0002] In the field of flat-panel display, organic light-emitting diodes (OLEDs, Organic Light Emitting Diods) are the development trend of the next generation of display and lighting due to their advantages such as wide viewing angle, ultra-thin, fast response, high brightness, and flexible display. One of the most promising display technologies.

[0003] The external quantum efficiency of OLED devices is mainly affected by two factors: one is the internal quantum efficiency of OLED devices, and the other is the light extraction efficiency of OLED devices. Recently, OLED devices have made positive progress in improving the internal quantum efficiency of the device. The application of phosphorescent materials has increased the internal quantum efficiency of organic electrophosphorescent devices from 25% to...

Claims

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