Fabrication method of holographic speckle structured organic light emitting diode

A technology of light-emitting diodes and a manufacturing method, which is applied in the fields of semiconductor/solid-state device manufacturing, semiconductor devices, electrical components, etc., can solve the problems of difficult control of groove depth of nano moth-eye structure, increased leakage current, dispersion band, etc., and achieves improved dispersion. and spectral drift phenomenon, the effect of directional enhancement of light

Inactive Publication Date: 2016-07-20
江苏弗吉亚模具科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the periodic grating structure is easy to cause dispersion and band shift; the preparation process of random folds is complicated, the controllability and repeatability are poor, and the groove depth of the nanomoth-eye structure is difficult to control, which is easy to cause increased leakage current
More importantly, none of the above solutions can achieve directional luminous efficiency enhancement, while directional luminous efficiency enhancement can achieve directional contrast enhancement, and directional contrast enhancement is particularly important for displaying in strong light environments, such as mobile phones in sunlight. Enhanced contrast across the range makes screen displays clearer and more vibrant

Method used

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  • Fabrication method of holographic speckle structured organic light emitting diode
  • Fabrication method of holographic speckle structured organic light emitting diode
  • Fabrication method of holographic speckle structured organic light emitting diode

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: The angle between the speckle object light and the reference light is 45 degrees.

[0043] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. 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.

[0044] The invention discloses a method for manufacturing an organic light-emitting diode with a speckle structure. join figure 1 As shown, the speckle structure 110 includes quasi-randomly distributed striped grooves 111 , quasi-randomly distributed speckled pits 112 and quasi-randomly distributed raised stripes 113 .

[0045] see figure 2 and image 3 As mentioned a...

Embodiment 2

[0069] Embodiment 2: The angle between the speckle object light and the reference light is 30 degrees.

[0070] In Embodiment 2, the angle between the speckle object light and the reference light is 30 degrees, and all other process steps and parameters are completely the same as in Embodiment 1. see Figure 11 , the test results show that within the range of 60-degree and 120-degree field of view, the light extraction efficiency of the present invention is directionally increased by 200%, and the 60-degree directional enhancement of the field of view is agreed to be due to the holographic speckle reproduction of positive and negative first-order images. It is also twice the angle of 30 degrees between the speckle object light and the reference light. It shows that the present invention can realize the enhancement of OLED directional light output by adjusting the angle between the speckle object light and the reference light.

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Abstract

The invention discloses a fabrication method of a holographic speckle structured organic light emitting diode. The fabrication method comprises the following steps of firstly, fabricating image surface holographic interference fringes of a speckle on photoresist by a holographic photoetching technique; secondly, sequentially fabricating a first electrode layer, an organic layer and a back electrode on the image surface holographic interference fringes; and finally, packaging to fabricate the holographic speckle structured organic light emitting diode. Directional light emergent enhancement of the organic light emitting diode can be controlled by adjusting an angle of holographic interference recording reference light to acquire the effect of directionally improving luminous efficiency, and moreover, the phenomena of spectrum drift and leakage current increase are prevented.

Description

technical field [0001] The invention relates to the technical field of organic light emitting diodes, and more specifically, to a method for manufacturing an organic light emitting diode with a holographic speckle structure. Background technique [0002] Organic light-emitting diodes are considered to be the most promising next-generation lighting and display technology after CRT and LCD due to many advantages such as active light emission, low power consumption, all solid state, high luminous brightness, rich colors, and easy realization of flexible display. And has shown a strong momentum of development in commercial product applications. [0003] However, although the internal luminous efficiency of organic light-emitting diodes is close to 100%, due to the refractive index mismatch of each functional layer of the device, most of the photons emitted by the light-emitting layer are still trapped inside the device and lost, only 20% of the light energy able to shoot. And ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/56H01L51/52
CPCH10K50/854H10K71/00
Inventor 周雷范媛媛朱雨富张俊胡光林毅
Owner 江苏弗吉亚模具科技有限公司
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