TW586330B - Full-color OLED panel to adjust color purity and manufacturing method thereof - Google Patents

Abstract

The present invention provides a full-color OLED panel to adjust the color purity and manufacturing method thereof. The full-color OLED panel is fabricated by reverse deposition steps as follows: fabricating a rampart on the cathode, evaporating the light-emitting layer on the cathode, sputter anode on the light-emitting layer, and fabricating the interference layer having interference effect by mask evaporation technology, and forming a resonant cavity with the distance between the interference layer and the cathode. When light resonates and interferes in the resonant cavity repeatedly, the specific light is reinforced and concentrated in the resonant cavity, so as to obtain the output with a single wavelength and ultrahigh intensity. Thus, the specific color light with high degree of saturation required by the full-color panel can be obtained.

Description

586330 V. Description of the invention (1)-[Technical field to which the invention belongs] The present invention relates to an organic electro-excitation light full-color panel capable of adjusting light color purity and a method of manufacturing the same. Reverse deposition process technology is used to make a full-color panel, and a resonant cavity (micr 〇cav 丨 ty) is used to improve the light source efficiency and light color saturation. [Previous technology] 0LED (0rganic Electro-Luminescence Display). Organic electro-optical light monitors, which can be divided into passive matrix drive (LED, PaSSive Matrix 0LED, PM〇LED) and active matrix drive (Ole DUctive Matrix) according to different driving methods. OLED, AM0LED) are mainly driven by current to drive organic thin film to emit light, but when faced with large size panels, in order to maintain the uniformity of 7C degrees of the panel, a large current must be injected, but the efficiency and life of the element will be greatly reduced. In addition, power consumption will also increase significantly. Since Kodak published research on 0LED technology in 1987, 0LED technology has made great progress, and the luminous efficiency of monochrome products has also been greatly improved. However, the ultimate goal is still full color, but the current technology of full color 0LED is still in Developed white and 'full-color 0 LED is composed of repeated pixels of three primary colors of red, blue, and green (R, G, B), the finer the pixel size, the higher the resolution will naturally be' The more popular full-color development technologies are mainly divided into the following three types: The first type is to add a color filter to the white 0LED display panel, the second type is to independently emit red, blue, and green colors, and the third type uses blue light. As a light source, a light-color conversion method for changing the light color of red, blue, and green through a light-color conversion film. The three-color light-emitting layer technology focuses on the mastery of the light color purity and efficiency of the light-emitting material, and the biggest bottleneck is the purity and efficiency of the red material.

Page 5 586330 V. Description of the invention (2) Ξ: Ϊ !; Add a color filter to the white 0LED display board to achieve the full effect: the neck lies in the light color red, blue and green three-color balance of the white light-emitting material. The biggest advantage of the full-color technology is that it can be straight-lined = color phosphor film, but in terms of light transmission efficiency and degree, it faces: Γ, blue, and green three independent light emission is poor; and the light-color conversion method currently lacks neck-thickness At the same time, the red application material also has poor luminous efficiency because it must add an intermediate layer material that displays Wang Cai. Yu Qu Er'e said: "The brightness of organic materials is inversely proportional to the lifetime, so you need to take a balance point ::: taking into account the combination of longevity, color purity and hair 3" at the current stage of development, not yet [Practical content of the invention] Alas, in order to avoid the existence of the above-mentioned deficiency of color, the main purpose of the present invention is to make an organic electro-excitation light full-color panel with two kinds of soils that can have a complete light color purity and its system: The present invention uses the principle of optical interference to resonate light waves, and a transparent conductive, (ndlum Tln oxide) side intersects with an overlapping layer as an interference layer, and forms a resonance interval between the cathode, using the cathode as a total reflection. Similar to laser resonance ', when the light wave resonates repeatedly in this interval, the light wave is strengthened and concentrated in this resonance cavity, and super high intensity = one wavelength can be obtained, so as to improve luminous efficiency and reduce power consumption. It can also be obtained by using the interference layer between the cathode and the cathode at different distances. Therefore, the color of the light on the full-color board can be adjusted and emphasized. [Embodiment] In order to allow your reviewers to understand the invention clearly To technical content

586330 V. Description of the invention (3) and the implementation means to achieve the above-mentioned invention purpose, here is a better and feasible example, and accompanied by a diagram, the description is as follows: Persistent [Schematic description of the diagram] The first diagram is the present invention Manufacturing process schematic. FIG. 2 is a schematic diagram of a single pixel cross-sectional structure of the LED of the present invention. FIG. 3 is a schematic structural diagram of the interference layer evaporation of the present invention. Fig. 4 is a schematic diagram of the ultra-high intensity time-wavelength emission obtained by the present invention after repeated resonance interference. Early ~ U = Refer to "Figure i and Figure 2" for cooperation, which are the schematic diagrams of the manufacturing process of the present invention and the schematic diagram of the single-pixel cross-section structure of the 0LED of the present invention, as shown in the figure: The organic electroluminescent full-color panel mainly includes a cathode 10, an emitting layer 11 on the cathode 10, an anode 12 on the emitting layer 11, and an anode on the anode. A dry mirror layer 120 (Ha 1 f mirror) on 12 and a protective layer 14 (Prtectec ng 1 aye Γ) on the interference layer 120. In order to achieve the above-mentioned organic electro-excitation full-color panel with adjustable light-color purity, the main manufacturing method steps are as follows: Step a1: A barrier wall 101 is fabricated on the cathode 10, and the cathode 10 may be magnesium (M g), silver (Ag), calcium (Ca), aluminum (A1), bell (Li) and other metal materials; Step b2: Then on the cathode 10-side by vapor deposition technology respectively

586330 V. Description of Invention (4)

Red, green, and blue light-emitting layers 1 color i The light-emitting layer ΐ; steam; Step c 3 · Sputter anode 1 2 on the light-emitting layer 1 1 side, where the anode 12 is 1 τ0 conductive glass Film, and the anode 12 also needs to consider the overall thickness when the machine is in operation. Step d 4: On the light emitting surface of the anode 12, two layers of refractive index materials are vapor-deposited by vapor deposition technology. As shown in the "Figure 3", the transparent conductive layer IT0 (Indium Tin Oxide)-side interactive overlapping dielectric works, where the interference layer 12 can be 21 layers, and the thickness of each layer is based on red, The wavelengths of different light colors of green and blue are

586330 V. Description of the invention (5) Red (Angel) Green (Angel) Blue (Angel) TI02 61.33 SI02 86.9 SI02 439.92 SI02 58.98 TI02 87 TI02 79.38 TI02 47.75 SI02 129 SI02 126.39 SI02 105.83 TI02 58.3 TI02 77.32 TI02 69.39 SI02 101 SI02 140.43 SI02 82.62 TI02 88 TI02 81.93 TI02 48.11 SI02 104 SI02 131.68 SI02 88.31 TI02 59.8 TI02 70.31 TI02 63.51 SI02 100 SI02 120.98 SI02 106.96 TI02 96.5 TI02 66.24 TI02 51.47 SI02 92.6 SI02 127.83 SI02 84.05 TI02 53.4 TI02 161 12.7 TI02 27.7 TI02 65.43 TI02 42.36 SI02 55,2 SI02 129 SI02 30.58 TI02 41ΛTI02 162.19 TI02 44.98 SI02 59.8 SI02 127.98 SI02 87.6 TI02 45.5 TI02 77.4 TI02 50.94 SI02 79.8 SI02 468.7 SI02 82.1 TI02 44.3 TI02 9.68 TI02 34.65 SI02 34.65 SI02 1372.39 TI02 51 total thickness 2947.71 total thickness 1547 In addition, a single resonant cavity is formed between the interference layer 1 2 0 and the cathode 10

Page 9 586330

V. Explanation of the invention (6) 1 3. When the light wave repeatedly interferes with the resonance cavity χ 3, the resonance cavity 13 is strengthened in the cavity, γ,, and the first wave is emitted at the wavelength, such as "the fourth blue gets super high The intensity of a single-wavelength emission is 'as shown in Figure 4.' Among them, a single-resonant cavity 1 3 must be vapor-deposited with different thicknesses according to the red and edge wavelengths (Qiu 捩 彳 / Π first color is · ^ d — η Λ, d Ο Γ # 3 Relation between length and wavelength von 2 d — η, where d represents the cavity length and λ represents an integer), can make different light and color waves I & 11 dpa / The anti-length forms resonance and interference effects. As shown in Figure 2, because the wavelength of red light is longer than that of the edge and blue, so the efficiency of the full-color panel is 42. The thickness of the resonant cavity 13 is reached by hand. The system includes the cathode 10 and the anode 1 2. Therefore, when the red light, green I, and thickness of the resonant cavity are steamed, the structure and thickness of each layer (unit: Angstrom) are as follows: [尤 之 红,: ΙΤ0 ( Anode) (1 500 angstroms) / CuPc (a hole injection, copper cyanide dye) (350 angstroms) / NPB (a hole transporting material, Type) (400 Angstroms) / Alq (—an electron-transporting material lining, an aluminum complex of quinine + 0.3% Rnb (—an orange-doped luminescent material) + 〇8% DCJTB (a red ^ miscellaneous luminescence Material) (400 angstroms) / Alq (—an electron transporting material, an aluminum complex of Kui Pan) (350 angstroms) / LiF (electron injection layer, lithium fluoride) (7 D / A1 (cathode) (1 500 angstroms). Green light: ITO (anode) (1 500 angstroms) / NPB (a hole-transporting material, aniline) (400 angstroms) / Alq (an electron transporting material, which is a quasi aluminum Material) + NPB (—a hole-transporting material, which is aniline) τ + 1.5% C545T (— a kind of green light-doped luminescent material) (600 angstroms) / eight 1 (1 (-

M8IH Page 10 586330 V. Description of the invention (7) (300 angstroms) / LiF (electron beam / A1 (cathode) (1 500 angstroms) Electron transporting material, aluminum complex of quinine) Lithium fluoride) (5 angstroms) / A1 (150,000) blue, · ITO (anode) (1500 angstroms) / CuPc (a hole injection material is copper cyanide dye) (300 angstroms) / NpB (a Hole transport material is aniline $ (500 Angstroms) / Ide_120 (a blue doped luminescent material) + 2.5% Ide 2〇 (: a blue doped luminescent material) (300 Angstroms) / Alq (—species The electron transport material is an aluminum complex of quinine) (200 angstroms) / LiF (electron injection layer, which is a gasification clock) (7 angstroms) / Α1 (cathode) (1500 angstroms). Step e5: In the interference layer A protective layer i4 (prtecting layer) is coated on 120; finally, the organic electroluminescent full-color panel with adjustable light color purity according to the present invention can be obtained after packaging and component testing. The organic electroluminescent full color The panel has great potential in the future, so the present invention uses the reverse deposition step to make [the present invention is to first fabricate the cathode i 0, then vapor-evaporate the light-emitting layer 11, and then sputter the anode · 1 2 Then several layers of interference layer 1 2 0 'are coated again, and then the protective layer 14 is coated again. Finally, the packaging is completed and tested by the dollar. Among them, another technical focus of the present invention is to use a mask evaporation technology to produce a resonant cavity. Full-color LED panel with effect and &: Resonance cavity 13 formed by the distance between the interference layer 120 and adjusting the light emission ^ length, so that the specific light wave is strengthened and concentrated in this resonance cavity, so it can get super high A single wavelength of intensity is emitted to obtain the high-saturation specific light color required for a full-color panel. ^

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention.

Page 11 586330 V. Description of the invention (8) The scope of the invention. That is, all equal changes and modifications made in accordance with the scope of patent application for the present invention are covered by the scope of patent for the present invention.

Page 12 586330 Brief Description of Drawings [Simplified Description of Drawings] Figure 1 is a schematic diagram of the manufacturing process of the present invention. FIG. 2 is a schematic diagram of a single pixel cross-sectional structure of the 0LED of the present invention. FIG. 3 is a schematic structural diagram of the interference layer evaporation of the present invention. Fig. 4 is a schematic diagram of the single-wavelength emission of ultra-high intensity obtained by the present invention through repeated resonance interference. [Illustration of drawing number] Step a 1 Step b 2 Step c 3 Step d 4 Step e 5 Cathode .................. ......... 1 0 Barrier wall .............. .............. 101 Emitting Layer ............ ........................ 11 Anode .............. ............... 1 2 Interference layer ... ............ 12 0 Resonant Cavity .. ....................... 13 The protective layer................................................ ... 14

Page 13

Claims (1)

586330 VI. Application for Patent Scope 1. A method for manufacturing organic electro-excitation light full-color panel with adjustable light color purity. The reverse deposition process is made as follows: a 1) a barrier wall b 2) on the cathode On one side, a red, edge, and blue light-emitting layer with a specific thickness is vapor-deposited on one side by a mask technology; c 3) Sputtering an anode on one side of the light-emitting layer and controlling the overall thickness; d 4 +) on the anode light-emitting surface It uses vapor deposition technology to repeatedly vapor-deposit two kinds of interference materials with two interference layers and form a single resonant cavity between the cathode and the cathode. Each single resonant cavity must be based on the different light colors of red, edge, and blue during evaporation. For different wavelengths, different thicknesses are vapor-deposited, so that different wavelengths of light can form resonance and interference effects. E 5) A protective layer is coated on the semi-permeable membrane. 2. A method for manufacturing an organic electroluminescent full-color panel capable of adjusting light color purity as described in item i of the scope of the patent application, wherein the thickness of the light-emitting layer is based on the wavelength of red light and is evaporated to 0.3% Rub ( An orange-doped light-emitting material) + 0.8% DCJTB (a red-doped light-emitting material) (· 40 () Angstrom). 3. A method for manufacturing an organic electroluminescent full-color panel with adjustable light color purity as described in item 1 of the scope of the patent application, wherein the thickness of the light-emitting layer is based on the wavelength of green light and is evaporated to 15% C545T (a Green light mixed with luminescent material) (600 angstroms). 4. A method for manufacturing an organic electroluminescent full-color panel capable of adjusting light color purity as described in item i of the scope of the patent application, wherein the thickness of the light-emitting layer is based on the wavelength of blue light and is vapor-deposited as Ide-12〇 (A Blue doped luminescent material) + 2.5% Idel20 (a blue doped luminescent material) (300 angstroms). Page 14 586330 VI. Application for patent scope 5. A manufacturing method of full-color panel with adjustable light color and pure excitation light as described in item 1 of the scope of patent application for organic red, green, blue angstrom and 1547 angstrom patent applications, of which The interference layers are vapor-deposited with thicknesses of 1 372. 39 and 2894 · 71 angstroms, respectively, according to the wavelengths of different light colors. Six kinds of organic electro-excitation full-color panels with adjustable light and color purity, which mainly include: a cathode is located on one and one is located on one; when light waves are strengthened and collected on the light emitting layer on the cathode and the light emitting layer The anode, the anode, the interference layer on the anode, the protective layer on the semi-permeable membrane, and the remote interference layer form a resonance interval between the anode and the cathode, and the resonance interference repeats within the interval. Specific light waves can get ultra-high intensity in this resonance cavity. Single wavelength. Page 15