TWI222229B - Light emitting device with nanometer core-shell conductive particle - Google Patents

Abstract

A light emitting device with nanometer core-shell conductive particle uses the nanometer core-shell conductive particle to solve the conventional problem of poor electric current distribution and penetration rate so that brightness of the light emitting device can be increased.

Description

1222229 V. Description of the invention (1) Technical field of the invention / The invention relates to a kind of light-emitting element, and in particular to a kind of light-emitting element having nano-core conductive particles. -: Fanguang hexapole has a wide range of applications. For example, it can be used in optical displays, parent communication, storage devices, communication devices, and Zhaoming penetrating devices. rImproving the brightness of light-emitting diodes: an important issue in the manufacture of light-emitting diodes. Prior Art II = No. 5,789,768 [its applicant is the same as the present case]: pole]: = light emitting diode structure shown, this prior art light emitting thunder; hn! Is a transparent oxide conductive layer 16 formed on the contact layer 15, : The current from m can be uniformly 1 1 1 pair in the transparent oxide conductive layer 16. The transmittance of the transparent oxide conductive layer can reach more than 85%. The light from the "3" day to the transparent oxide conductive layer can be easily taken out. The resistance value of the ίίΠ layer is about 20 ~ 100 Ω / □, where the resistance value is ^ Shi Road / for small-sized light-emitting elements is still feasible ', but it is not applicable when applied to large-sized light-emitting elements. 1 ^ Country Patent No. 5, 563, 422 discloses a light-emitting diode structure Φ Φ formed on a P-type contact layer at a low temperature to form a very thin Ni / Aluminium transparent conductor: using the low resistance value of the metal to achieve The effect of the current distribution is the light-emitting characteristics of light-emitting monopoles. However, the transparent conductive layer of this kind of material ', after fusion processing, has a straight transmission rate of only 50%. / ◦ ~ 70%, so it affects the luminous efficiency of light-emitting diodes. ,Spoon

Page 6 1222229 V. Description of the invention (2) In the Republic of China Patent No. 134, 587, a structure of a light-emitting element is disclosed. A composite anti-reflection layer exists on the surface of the element, and the composite anti-reflection layer is made of a metal conductor. A layer such as Ag, the metal conductor layer is in contact with the A 1 InGaP light-emitting element, and a transparent oxide conductive layer such as indium tin oxide or tin oxide is provided on the conductor layer to help increase the current diffusion efficiency. However, in essence, "the thickness of the metal conductor must be thin enough to reduce the degree of light absorbed by the metal conductor." In addition, the bonding force between the metal conductor layer and the A 1 I n G a P light-emitting element is very poor. It is easy to peel off, which is not conducive to the subsequent process. SUMMARY OF THE INVENTION Inspiration, it is believed that if a nano-core conductive particle layer is used to replace the metal conductive layer of the conventional technique, the nano-core conductive particle has silver as the core and is outside it; Can prevent the oxidation of silver and form a nuclear plutonium

<Aippingj 沄 is formed on the light-emitting stack, and the particle layer forms i: layer forms i conductive layer 2. When the inventor of the present case is thinking about how to solve the aforementioned shortcomings, he obtains a spray or impregnation to make Nair Nuclear lead

1222229

Improve the luminous efficiency of the light-emitting element. SUMMARY OF THE INVENTION The problem is that the light-emitting element, which is the main element of the present invention, is transparent due to its diameter. The purpose is to provide a nano-core-shell conductive particle-nano-core-shell conductive particle layer to replace the conventional technology. The nano-core conductive particle is a nano-scale particle κ; it will solve the light penetration efficiency in the conventional technology. Poor evening road water development ^ Another purpose is to provide a nine-piece piece with nano-core conductive particles. The nano-conductive particles can be evenly suspended in a solvent, and a 1-nanometer solution of nano-conductive particles can be cost-effective. A lower spray or ^ (dippmg) method is formed on the light-emitting stack to form a nano-core-shell conductive particle layer, thereby reducing costs and simplifying the manufacturing process. Yet another object of the present invention is to provide a light-emitting 70 piece having nano-core-shell conductive particles 'between the nano-core-shell conductive particle layer and the light-emitting stack' to form a transparent oxide conductive layer, the transparent oxide conductive layer It can form ohmic contact with the light-emitting stack, and the nano-core-shell conductive particle layer can increase the conductivity of the transparent oxidized conductive layer and still maintain a better light penetration efficiency, which can improve the light-emitting efficiency of the light-emitting device in the south. According to a preferred embodiment of the present invention, a light-emitting element having a nano-core-shell conductive particle layer includes a first electrode, a substrate formed on the first wiring electrode, a first binding layer formed on the substrate, A light-emitting layer formed on the first binding layer, a second binding layer formed on the light-emitting layer, a first contact layer formed on the second binding layer, and the first connection layer

Page 8 1222229 V. Description of the invention (4) A transparent oxidized conductive layer on the contact layer, wherein the upper surface of the transparent oxidized conductive layer includes a first contact region and a second contact region, and the first contact region is formed on the transparent oxide conductive layer. A nano-core-shell conductive particle layer on a contact region, and a second wiring electrode formed on the second contact region of the transparent oxide conductive layer. The substrate includes at least one material selected from the group consisting of GaP, GaAs, and Ge; the first binding layer, the light emitting layer, and the second binding layer include A 1 GalnP; the first contact layer, At least one material selected from the group consisting of GaP, GaAs, GaAsP, InGaP, AlGalnP, and AlGaAs; the transparent conductive layer includes at least one selected from indium tin oxide, cadmium tin oxide, antimony tin oxide, zinc oxide, and At least one material in the group of materials consisting of zinc tin oxide; the core of the nano-core-shell conductive particle layer includes at least one material selected from the group of materials consisting of Ni, Ag, or Cr; the nano The shell of the core-shell conductive particle layer contains at least one material selected from the group consisting of ^ or Pt. For an embodiment, please refer to FIG. 2. According to the present invention, “the light-emitting element 22 of the electric particle layer” embodiment has a nano-core-shell conductive first wiring electrode 28 on the first wiring electrode, and is formed on the first- Binding layer 22, formed on the =, formed on the substrate 20-formed on the light-emitting layer 23 "one of the light-emitting layer 23 on the binding layer 22, one of the first network M on the binding layer 24 A binding layer 24 is formed on the second beam-transparent oxidizing conductive layer 26: 22: a first contact region and a second contact layer formed on the first contact layer 25 are formed; An upper surface is covered with a contact area and is formed on the transparent oxide conductive layer 1222229

A nano-core-shell conductive particle layer 27 on the first-contact region, and a second wiring electrode 29 formed on the second contact region of the transparent oxide conductive layer. Referring to FIG. 3, a light-emitting το member 3 having a nano-core-shell electric particle layer according to another preferred embodiment of the present invention includes an insulating substrate 30, one formed on the second substrate 30, and the second substrate 30. The contact layer 31, wherein the upper surface of the second contact layer 31 includes a first surface region and a second surface region $, one of the first binding layers 32 formed on the first surface region 2, and formed on the first -One of the light emitting layers 33 on the second layer, a second tie layer formed on the light emitting layer 33, a first contact layer 35 formed on the second tie layer 34, and a second contact layer 35 Upper one—the transparent oxide conductive layer ⑼, wherein the upper surface of the transparent oxide conductive layer includes a first contact area and a second contact area, and a nano-core shell formed on the first contact area of the transparent oxide conductive layer. The conductive particle layer 37, a first wiring electrode 38 formed on the second contact region of the transparent oxidized conductive layer, and a second wiring electrode 39 formed on the second surface area. Please refer to FIG. Luminescence of another preferred embodiment of the invention having a nano-core-shell conductive particle layer The component 4 differs from the light-emitting element 3 in that a nano-core conductive particle layer 37 is formed on the transparent oxide conductive layer 36, and a second transparent oxide conductive layer 46 formed on the nano-core conductive particle layer 37, A first wiring electrode 38 formed on the second transparent oxide conductive layer 46, and a second wiring electrode formed on the second surface area. In the first and second preferred embodiments described above, the The method for synthesizing nano-core-shell conductive particles includes the following steps, dissolving lg of tetragas auric acid and lg of silver nitrate in 100 mL of secondary deionized water, and (a) taking a silver nitrate solution of 0.375 mL in 50%.

Page 10 1222229 V. Description of the invention (6) mL volumetric flask, and diluted to 50 mL; (b) first take silver nitrate solution 0 · in a 50 mL volumetric flask, and dilute to 50 '; 0.865 mL of the acid solution in a 50 mL volumetric flask, and diluted to 50 mL [aforesaid (i) Moore ratio of 1: 1 gold and silver (a) is silver (c) is gold, and ") and ((〇 For comparison group], the solution was moved to a beaker and heated, and stirred in an oil bath for six minutes. In addition, a 1% weight percent trisodium citrate (trisodium citrate) with 2% % Tannic acid is ^ original agent, added to the metal solution of (b) above, at this time it can be observed that the dissolution night changes from the original colorless to pale yellow, because the silver ions in the solution are Caused by reduction to silver atoms. Stir continuously in an oil bath for fifteen minutes, at this time slowly add 0.43 mL of tetrachloroauric acid solution, and continue to stir for ten ^ five minutes, and then remove the heat. Source, continue to stir for ten minutes. The purpose of this step is to achieve high uniformity of particle size distribution. Through the above steps, you can get 6 (AgcoreAushell) structured nano-core-shell conductive particles. This nano-core-shell conductive particle aqueous solution is diluted with alcohol and can be formed at the desired electrode by spraying to form a conductive film. Among them, silver has extremely low resistance. Metal, but silver itself is easily oxidized, so the present invention prevents this oxidation phenomenon by adding gold. Since all reactions are performed in the liquid phase, the particle size of the powder can still maintain the original small scale. The aforementioned substrate , Which contains a material selected from the group consisting of GaP, GaAs, GaAsP,

At least one material from the group of materials consisting of AlGaAs, SiC or Ge; said insulating substrate comprises a material selected from the group of materials consisting of A1 203 or glass or other alternative materials; the aforementioned first comprises a material selected from A1GaInP , A1N, GaN, A1GaN, InGaNUUnGaim

1222229 V. Description of the invention (7), at least one material constituting the material group; the light-emitting layer system includes at least one material selected from the group consisting of AlGalnP, GaN, InGaN, or AlInGaN; the second binding layer system Contains at least one material selected from the group consisting of A1GaInp, A1N, GaN, AlGaN, InGaN, and A1 InGaN; the first or second contact layer includes a material selected from KGaP,

GaAs, GaAsP, InGaP, AlGalnP, AlGaAs, GaN, InGaN or

At least one material from the group consisting of AlGaN; the transparent oxide = electrical layer or the second transparent oxide conductive layer includes a material selected from the group consisting of indium tin oxide, cadmium tin oxide, antimony tin oxide, oxide, and zinc tin oxide At least one material in the group; the core of the nano-core-shell conductive particle layer includes at least one material selected from the group consisting of Ni, Ag, or Cr; the nano-core-shell conductive particle layer The shell comprises at least one material selected from the group consisting of Au or a group of materials. Although the light-emitting diode of the present invention has been disclosed in the preferred embodiment above, the scope of this month is not limited to the above-mentioned preferred embodiment, and should be defined by the scope of the ancient master below. Therefore, any person who is familiar with this art can make any changes without the scope and spirit of the patent application of the invention.

Page 12122229 Brief description of the drawings Brief description of the drawings: Fig. 1 is a schematic diagram showing the structure of a prior art light-emitting diode; Fig. 2 is a schematic diagram showing a device according to a preferred embodiment of the present invention. Light-emitting element with nano-core-shell conductive particle layer; FIG. 3 is a schematic diagram showing a light-emitting element having a nano-core-shell conductive particle layer according to another preferred embodiment of the present invention. Fig. 4 is a schematic view showing a light emitting device having a nano-core-shell conductive particle layer according to still another preferred embodiment of the present invention.

DESCRIPTION OF SYMBOLS 10 Substrate 11 First binding layer 12 Light emitting layer 13 Second binding layer 14 Window layer 15 Contact layer 16 Transparent oxide conductive layer 17 Back electrode 18 Front electrode 2 Light emitting element 20 Substrate 22 First binding layer 2 3 Light emitting layer

Page 13 1222229 Brief description of drawings 24 Second binding layer 25 Second contact layer 2 6 Transparent oxide conductive layer 27 Nano-core conductive particle layer 28 First wiring electrode 29 Second wiring electrode 3 Light-emitting element 30 Insulating substrate 31 Two contact layers 32 First binding layer 33 Light emitting layer 3 4 Second binding layer 35 First contact layer 36 Transparent oxide conductive layer 37 Nano-core conductive particle layer 3 8 First wiring electrode 39 Second wiring electrode 4 Light emitting element 46 Second transparent oxide conductive layer

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Claims (1)

1222229 VI. Scope of patent application 1 · A light-emitting element having a nano-core-shell conductive particle layer includes: a light-emitting stack; a transparent oxidized conductive layer formed on the light-emitting stack; and nano-core-shell conductive particles Layer, formed on the transparent oxidized conductive layer 2 &lt; t the light-emitting element with a nano-core-shell conductive particle layer described in item 1 of the patent application scope, further comprising a light-emitting stack and the air-permeable layer respectively formed The first wiring electrode and the second wiring electrode on the conductive layer. &lt; The optical element having a nano-core-shell conductive particle layer I according to item 1 of the scope of the patent application, wherein the light-emitting stack includes: a substrate; a first conductive semiconductor stack; a light-emitting layer; and A conductive semiconductor layer. The light emitting element having a nano-core-shell conductive particle layer as described in item 1 of the scope of the patent application, further comprises a second transparent oxide conductive layer formed on the nano-core-shell conductive particle layer. ] As described in the &amp; A patent claim No. 4 of the scope of the patent claims having a nano-core-shell conductive particle layer two light elements, which further includes being formed on the light-emitting stack and the first light-emitting oxide conductive layer The first wiring electrode and the second wiring electrode. 1222229 Til, please refer to the conductive particle layer with nano-core and shell described in the first item of the patent scope = hair = ", in which the transparent oxidized conductive layer contains a group selected from the group consisting of tin oxide oxide, antimony tin oxide, zinc oxide and zinc oxide. At least one material in a group of materials made of tin. The second transparent oxidized conductive layer in AW ΓΓ is described in item 4 of the conductive particle with nano-core-shell conductive particles described in the patent scope, and is selected from the group consisting of oxygen = indium tin, cadmium tin oxide, antimony tin oxide, At least one material from the group of zinc oxide and hibiscus materials. 〒 Site structure 8. A light-emitting element having a nano-core-shell conductive particle layer, comprising: a first wiring electrode; a substrate formed on the second wiring electrode; a first binding layer formed on the substrate Over; a light emitting layer formed on the first binding layer; a second binding layer formed on the light emitting layer; a first contact layer formed on the second binding layer; a transparent oxidation A conductive layer is formed on the first contact layer, wherein the upper surface of the transparent oxidized conductive layer includes a first contact region and a first and a first region; a silver-contacted nano-core-shell conductive particle layer is formed on the transparent layer; On the first contact area of the oxidized conductive layer; and 9 the first wiring electrode formed on the second connection of the far-transparent emulsified conductive layer 1222229 6. the patent application scope of the touch area. 9. A light emitting element having a nano-core-shell conductive particle layer, comprising: an insulating substrate; a second contact layer formed on the insulating substrate, wherein an upper surface of the second contact layer includes a first surface A region and a second surface region; a first binding layer formed on the first surface region; a light emitting layer formed on the first binding layer; A second tie layer is formed on the light emitting layer; a first contact layer is formed on the second tie layer; a transparent oxide conductive layer is formed on the first contact layer, wherein the transparent oxide The upper surface of the conductive layer includes a first contact region and a second contact region, and a nano-core-shell conductive particle layer is formed on the first contact region of the transparent oxide conductive layer; A second wiring electrode is formed on the second surface area; and a first wiring electrode is formed on the second contact region of the transparent oxide conductive layer. 10. A light-emitting element having a nano-core-shell conductive particle layer, comprising: a substrate; a first binding layer formed on the substrate; a light-emitting layer formed on the first binding layer; Page 17 1222229 VI. Patent application scope A second binding layer is formed on the light emitting layer; a first contact layer is formed on the second binding layer; a first transparent oxidation conductive layer is formed on the Over the first contact layer; a nano core-shell conductive particle layer formed on the first transparent oxidized conductive layer; a first transparent oxidized conductive layer formed on the nano core-shell conductive particle layer; A first wiring electrode is formed on the second transparent oxide conductive layer; and a first wiring electrode is formed on the second surface area. 11 · The light-emitting element having a nano-core-shell conductive particle layer according to item 8 or item 9 of the scope of the patent application, wherein the transparent oxide conductive layer comprises a material selected from the group consisting of indium tin oxide, cadmium tin oxide, and antimony tin oxide At least one material from the group of materials consisting of zinc oxide, zinc oxide and zinc tin oxide. 12. The light-emitting element having a nano-core-shell conductive particle layer as described in item 10 of the scope of patent application, wherein the first transparent oxidized conductive layer includes selected, self-emulsified indium tin, cadmium tin oxide, and antimony tin oxide. 、 Zinc oxide # forms at least one material in the material group. And emulsified zinc-tin-as described in item 10 of the scope of the patent application, has a nano-optical element, wherein the stomach is second transparent oxidized conductive / conducting electric charge :: Dindium tin, tin oxide, tin oxide, For zinc oxide and zinc tin oxide, the scope of patent application shall be at least one material in the material group. According to item 3 of the scope of the patent application, there is a material group consisting of Xiaoyang, Gap, GaAsp, AiGaAs, or a metal, or a substitute material. : Such as :: Special Second Fan ;,; aA 二 A1 ⑽, Tier 2 :: A kind of material 枓 or other alternative materials.野 r 1 master seed material 1 6. As described in the patent application scope of the light-emitting element of the electric particle layer, it has a nano-core shell-conductor 1 7 · As in the scope of the patent application, it has a nano-core-shell conductive particle # The core system of the conductive particle layer according to item ^, item / 9, or item 1G includes; a prior art piece, wherein at least one material in the nano-core shell is selected from the group consisting of Nl, Ag, or V 胄 材 枓 or other alternative materials in the material group. 1 8 · If the item in the scope of the patent application, the item with the nano-core-shell conductive particle layer, the item / 9, or the item f described in item 10, the nano-core is provided with the scope of the patent application To; ί::: G?: Contains «materials or other alternative materials selected from the group consisting of Au or Pt. Ye r "19. According to item 8 of the scope of the patent application, the core-shell conductive particle layer has 10% or less of Aicm; 7 ^, wherein the first binding layer is formed into a material At least two G of n in the group ::, GaN, InGaN or A1 InGaN, or other substitute materials. H. In the light-emitting element having a nanometer, A; Γτ electro-particle layer as described in the patent scope item 8, 9, or 10, the light-emitting layer contains a selected small _ a np, GaN, InGaN, or A1 InGaN One of the materials in the formed material group or other alternative materials. 2 1 The light-emitting element having a nano-shell conductive particle layer as described in item 4, item 9, or item 10 of the patent application scope of 4, wherein the second binding layer is each selected from AlGalnP, A1N At least one of the materials in the group consisting of GaN, AlGaN, InGaN, and A1 InGaN, or other alternative materials. 22. The light-emitting device having a nano-core-shell conductive particle layer as described in claim 8, item 9, or item 0, wherein the first contact layer comprises a member selected from the group consisting of GaP, GaAs, and GaAsP. AtGa, InGaP, AlGalnP, AlGaAs, GaN, InGaN, or AlGaN are at least one material group. 2 3 · A nano-core-shell conductive particle layer as described in item 8 of the scope of patent application Page 20 1222229 6. A patent-applied light-emitting device, wherein the second contact layer comprises a material group selected from the group consisting of GaP, GaAs, GaAsP, InGaP, AlGalnP, AlGaAs, GaN, InGaN, or A 1 G a N At least one material in the group. Page 21