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OLED light emitting device, preparation method, display substrate and display device

A technology for light-emitting devices and display substrates, applied in the fields of display substrates, OLED light-emitting devices and their preparation, and display devices, can solve the problems of light output efficiency, viewing angle limitation and reflectivity of OLED devices, and avoid light energy loss and increase viewing angle. , the effect of improving the light extraction rate

Pending Publication Date: 2017-12-26
BOE TECH GRP CO LTD
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Problems solved by technology

[0004] In the case that the second electrode adopts a semi-transparent electrode, since the light transmittance of the semi-transparent electrode is generally lower than 70%, and the reflectivity is relatively high, the light-emitting device forms a strong microcavity effect, resulting in the light output efficiency of the OLED device and viewing angle is limited

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  • OLED light emitting device, preparation method, display substrate and display device
  • OLED light emitting device, preparation method, display substrate and display device
  • OLED light emitting device, preparation method, display substrate and display device

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] An embodiment of the present invention provides an OLED light-emitting device, such as figure 1 As shown, the OLED light-emitting device includes a reflective electrode 01 , an organic light-emitting layer 02 , and a semi-transparent electrode 03 arranged in sequence.

[0034] Of course, those skilled in the art should understand that in addition to the above-mentioned reflective electrode, organic light-emitting layer, and translucent electrode, the OL...

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Abstract

The embodiment of the invention provides an OLED light emitting device, a preparation method, a display substrate and a display device, and relates to the technical field of display. According to the technical purposes, the light extraction efficiency of the OLED light emitting device can be improved, and the visual angle can be increased. The OLED light emitting device comprises a reflecting electrode, an organic light-emitting layer and a semitransparent electrode, wherein the reflecting electrode, the organic light-emitting layer and the semitransparent electrode are arranged in sequence; the OLED light emitting device further comprises a light extraction layer which is located on the side, away from the organic light-emitting layer, of the semitransparent electrode and makes contact with the semitransparent electrode, the light extraction layer is of a single-layer structure in which the refractive index is decreased progressively in the light-emitting direction, and the light-emitting direction is the direction, away from the organic light-emitting layer, of the light extraction layer, wherein the refractive index of the side, making contact with the semitransparent electrode, of the light extraction layer is larger than the refractive index of the semitransparent electrode.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an OLED light-emitting device and a preparation method, a display substrate, and a display device. Background technique [0002] Organic Light Emitting Diode (OLED) displays have been widely used in computers, mobile phones, etc. Various electronic devices including electronic products. [0003] Wherein, the light-emitting device in the OLED display device includes a first electrode, a second electrode, and an organic functional layer located between the first electrode and the second electrode, wherein the first electrode is a reflective electrode, and the second electrode is a transparent electrode or a semi-transparent electrode. transparent electrodes. [0004] In the case that the second electrode adopts a semi-transparent electrode, since the light transmittance of the semi-transparent electrode is generally lower than 70%, and the reflectivity is relatively high, the li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/52H01L51/56
CPCH10K59/879H10K2101/80H10K2102/3026H10K2102/351H10K50/858H10K50/818H10K50/828H10K71/00
Inventor 姜博黄维
Owner BOE TECH GRP CO LTD
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