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Organic light-emitting device and manufacture method of light extraction structure thereof

A technology of an organic light-emitting device and a manufacturing method, which is applied in the field of optoelectronics, can solve the problems of low light extraction efficiency and lack of total reflection light of OLEDs, and achieve the effects of improving light extraction efficiency, eliminating total reflection, and improving lifespan

Active Publication Date: 2010-04-14
SHENZHEN DANBANG INVESTMENT GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The light extraction efficiency of traditional OLED is still low, and there is no effective way to extract the total reflection light at the ITO / glass interface

Method used

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  • Organic light-emitting device and manufacture method of light extraction structure thereof
  • Organic light-emitting device and manufacture method of light extraction structure thereof
  • Organic light-emitting device and manufacture method of light extraction structure thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 (organic light-emitting device)

[0032] figure 2 , image 3 and Figure 6 A specific embodiment of the organic light-emitting device of the present invention is shown.

[0033] Such as figure 2 and image 3 As shown, the organic light emitting device includes a substrate 1 , a transparent anode 2 , an organic hole transport layer 3 , a light emitting layer and an electron transport layer 4 and a cathode 5 . The transparent anode 2 is located on the substrate 1 , the organic hole transport layer 3 is located on the transparent anode 2 , the light emitting layer and the electron transport layer 4 are located on the organic hole transport layer 3 , and the cathode 5 is located on the light emitting layer and the electron transport layer 4 .

[0034]The substrate 1 is made of single crystal yttrium aluminum garnet (YAG), its refractive index is 1.83-1.87, and its thermal conductivity is 0.11W / cm·K (300k). The substrate 1 is made of a material with high...

Embodiment 2

[0036] Embodiment 2 (organic light-emitting device)

[0037] Figure 4 and Figure 5 Another specific embodiment of the organic light-emitting device of the present invention is shown.

[0038] The difference between this organic light-emitting device and Embodiment 1 is that the shape of the light extraction structure on the surface of the substrate 1 facing away from the transparent anode is different, and in this embodiment, each facet of the light extraction structure forms a regular truncated inverted cone; The substrate 1 is made of aluminum nitride with a refractive index of 1.87-2.20 and a thermal conductivity of 1.4-2W / cm·K (300k).

[0039] The principle of improving the light extraction efficiency of the organic light-emitting device is the same as that of the first embodiment.

Embodiment 3

[0040] Embodiment 3 (Manufacturing method of a light extraction structure of an organic light-emitting device)

[0041] The light extraction structure on the substrate 1 in Embodiment 1 and Embodiment 2 is fabricated by the following steps:

[0042] 1. On the surface of the substrate 1, use magnetron sputtering or plasma chemical vapor deposition to make a silicon dioxide or silicon nitride masking layer, and on the surface of the substrate 1 (the surface facing away from the optically transparent layer 2 on the organic light-emitting device) , facing the air) on the masking layer to form a pattern by photolithography, the surface of the substrate located under the reserved part of the masking layer is shielded, and the rest is exposed;

[0043] 2. Heat 85% phosphoric acid to 150-170°C for dehydration for 10 minutes, then mix it with 98% sulfuric acid at a ratio of 3:1, and slowly raise the temperature to 190-300°C to obtain an etching solution;

[0044] 3. Preheat the substr...

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Abstract

The invention provides an organic light-emitting device which comprises a base plate, a transparent anode positioned on the base plate, an organic cavity transport layer positioned on the transparent anode, a light-emitting layer and an electronic transport layer which are positioned on the organic cavity transport layer, and a cathode, wherein a light extraction structure capable of eliminating total reflection of an interface of the base plate and the air is formed on the surface of the base plate backing on to the transparent anode. The invention also provides a manufacture method of the light extraction structure of the organic light-emitting device. In the invention, the light extraction structure is formed on the base plate and can eliminate the total reflection of the interface of the base plate and the air to further improve the light extraction rate; and the base plate adopts material with high refractive index and high thermal conductivity, and therefore the organic light-emitting device has good heat dissipation performance, and can eliminate the total reflection between the base plate and the transparent anode, and improve the light extraction efficiency and the life of OLED simultaneously.

Description

【Technical field】 [0001] The invention relates to optoelectronic technology, in particular to an organic light-emitting device with higher light extraction efficiency and a manufacturing method of the light extraction structure. 【Background technique】 [0002] Since C.W.Tang's pioneering work, organic light-emitting devices (OLEDs) have greatly improved in terms of brightness, efficiency, and stability. The efficiency of green light can reach more than 100lm / W, and the efficiency of white light has reached tens of lm. / W, OLED displays based on glass substrates have been put into practical use, and displays and light sources based on flexible substrates have also been demonstrated. With the further improvement of performance, OLED has the possibility of developing into a power device. [0003] High-intensity OLED power devices require OLEDs to have higher efficiency, higher brightness, higher current density and longer lifetime. For example, OLED light sources, depending o...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/56
Inventor 刘萍陈文彬
Owner SHENZHEN DANBANG INVESTMENT GROUP
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