TW583893B - Multi-layered PLED device to reduce the cathode reflection and manufacturing method thereof - Google Patents

Abstract

A multi-layered PLED device to reduce the cathode reflection and manufacturing method thereof are disclosed, which is to dissolve the polymer into appropriate organic solvent, then coat the polymer solution onto a flexible substrate, roll it after baking. Repeat the above steps, so as to obtain plural flexible substrates pasted with different polymer films, then transfer-paste the polymer film onto the transparent conductive substrate from the flexible substrate sequentially in the way of roller transfer-printing or transmission-printing each flexible substrate. After the transfer-pasting of each polymer film layer is completed, evaporate a layer of translucent metal layer on the polymer film, sputter a transparent conduction layer on the translucent metal layer, sputter a cathode on the transparent conduction layer, package the device finally, so as to obtain a multi-layered PLED device for reducing the cathode reflection.

Description

583893 V. Description of the invention (1) [Technical field to which the invention belongs] ... The present invention relates to a multilayer polymer electro-optical light-emitting element for reducing cathode reflection and a method for manufacturing the same, especially a method for borrowing * r〇l l_t〇-Γ〇 1 1 process to make PLED multilayer components with reduced cathode reflection. [Prior technology] It is known that organic electroluminescent display technology, referred to as 0EL, is a very popular topic in recent flat display technology. Because 0EL is thinner and lighter than ^!), It has self-luminous, high response speed (compared with TFT-LCD is thousands of times faster), wide viewing angle (more than 160 degrees), power saving, high contrast, and low cost (no backlight version, polarizing film, color filter, etc. are needed. After mass production, the cost will be higher than TFT — lcd low) and other advantages, has attracted a large number of manufacturers at home and abroad to invest in this field, OEL has become a star product in the flat panel display. The technology of organic electroluminescent devices can be divided into two types according to the different organic thin film materials used. Among them, the polymer-based device system of conjugated polymer materials is called PLED (PLED (PLED 〇lymer Light Emitting Diode), another small molecular element (M ο 1 ecu 1 e -based device) system based on dyes and pigments, is called OLED (Organic Light Emitting Diode). The light-emitting principle of organic electro-optic light-emitting elements is similar to that of light-emitting diodes. Therefore, OLED and PLED are called. They also use the characteristics of materials to combine electrons and holes in the light-emitting layer, and the electrons are separated by The excited state is returned to the ground state, and the excess energy is released in the form of waves, thus reaching light-emitting elements of different wavelengths. The so-called covalent polymer, its main chain is an interphase unsaturated π-electron co-polymer

Page 5 583893 V. Description of the invention (2) ------ The long band of yoke is composed of the energy band difference between the bond and anti-bond between the π electron cloud co-roller system in these polymers is about 15 ~ 2 0 eV, which is similar to the energy of the valence and conduction bands of non-abundant conductors. If the conjugated high molecular is dissolved in an appropriate organic solvent, spin-coating can be used to coat the conjugated fluorene molecule solution on the cleaned 丨 τ〇 glass substrate, and one piece is evenly distributed on the glass substrate. Conjugated polymer film on ΙΤ glass substrate

This method can be easily achieved, and this process that can be processed by night processing is the very important feature of PLED. Compared to 0LED, which requires vacuum thermal evaporation, the materials of the charge conductive layer and the light-emitting layer are evaporated. This method is very simple. Moreover, ED can be fabricated on a flexible substrate and is considered to be a deep and potential display. Eight of them, because the cathode of PLED is metal, its display panel may have cathode reflective interference in bright environments such as outdoors. The general solution is to use a non-reflective cathode (black cathode) or a coating that absorbs light. The layer (black layer) or the circular polarizing plate for light treatment on the element is solved. However, the above-mentioned traditional methods to solve the cathode reflection, or the effect is not good, or else it is not easy to manufacture and process, can not effectively solve the problem of reflection interference of the display in a strong light environment. [Summary of the Invention] The main purpose of the present invention is to solve the above-mentioned traditional defects and avoid the existence of the defects. In the present invention, polymer films are manufactured by the process of roH-to-r〇11, and each polymer film is made one by one. Activation transfer to electricity ', then a metal semi-lens is deposited on the element, and then

Page 6 583893 V. Description of the invention (3) After reaching the above-mentioned components and components, the components will be packaged in the order of winding, film softness, and after a layer of transparent conductive layer is steamed on the substrate, the components will be the components. Method] For the transparent material of this hair phase, a layer of cathode is finally sputtered, and the amorphous contrast of the p LED layer is increased by the excitation light machine solvent dried and then printed on the indium tin substrate with molecular thin printing. The final excitation light is sputtered. [Implement the following purpose, the manufacturer should divide the substrate and repeat the substrate, plate each layer of the Gaocheng method of the present invention, the above steps of the solution, and then each molecule thin polymer metal half, and then reduce the available first Two lenses are coated in a single step, that is, a lens with a soft base film and a soft film. The transparent molecules with a small number of cathodes dissolve a soft base to obtain a plurality of plates. These plates are reposted through a roll substrate, and then reflected on the conductive layer. The multi-layer polymer is applied on a suitable board, and a high-wheel transfer or transparent paste is applied to the transparent lead. The oxygen metal semi-lens is sputtered on the cathode. Now, in conjunction with the drawings, [Schematic description of the drawings] FIG. 1 is a schematic diagram of the first step of the manufacturing method of the present invention. Figure 2 is a schematic diagram of the second step of the manufacturing method of the present invention. FIG. 3 is a schematic diagram of the third step of the manufacturing method of the present invention. Figure 4 'is a schematic diagram of the fourth step of the manufacturing method of the present invention. FIG. 5 is a schematic diagram of the fifth step of the manufacturing method of the present invention. FIG. 6 is a schematic diagram of the sixth step of the manufacturing method of the present invention. Please refer to "shown in Fig. 1", which is the first step of the manufacturing method of the present invention.

V. Description of the invention (4) Schematic diagram. As shown in the figure: the multi-layered high-eight-electron electro-excitation light-reducing element of the present invention for reducing cathode reflection is first fixed a flexible substrate 11 on a coating machine 2 1 2. Please refer to "shown in Fig. 2", which is a schematic diagram of the second step of the manufacturing method of the present invention. As shown in the figure: the polymer is first dissolved in an appropriate organic solvent, and then the polymer solution is coated on a flexible substrate, and then the $ molecule is dissolved in the appropriate organic solvent, and is rotated by Coating (not shown in the figure), patterning roller 22 coating, screen printing (not shown), blade 5 coating or inkjet coating (not shown) apply the polymer solvent to On the flexible substrate 11. 'Please refer to "shown in Fig. 3", which is a schematic diagram of the third step of the manufacturing method of the present invention. As shown in the figure, after the above-mentioned polymer solvent is dried, a polymer film 13 attached to the flexible substrate 11 is formed, and then the flexible carrier substrate π is rolled up by a roller 15. The above steps are repeated to obtain a plurality of flexible substrates 11 on which the polymer film 13 is attached. Please refer to "shown in Fig. 4", which is a schematic diagram of the fourth step of the manufacturing method of the present invention. As shown in the figure, the polymer film 3 is first heated to a temperature slightly higher than the polymer softening temperature (Tg point), the polymer film 13 is activated, and then each flexible substrate 11 is rotated by a roller 15 In the method of printing or through-printing, the high-molecular film 13 is sequentially transferred from the flexible substrate 11 to the transparent conductive substrate 14 and the flexible substrate 11 is recycled for reuse. Please refer to "shown in Fig. 5", which is not intended for the fifth step of the manufacturing method of the present invention. As shown in the figure: after the completion of each layer of polymer film 丨 3

Page 8 583893

Then, a metal semi-lens is deposited on the polymer layer 13 and a transparent conductive layer is sputtered on the metallic half-lens 16. A cathode is then sputtered on the bright layer 17. 18. Please refer to "shown in Fig. 6", which is a schematic diagram of the sixth step of the manufacturing method of the present invention. As shown in the figure: After finally encapsulating the component, 9 can be obtained, reduced " multi-layered south molecular electrical excitation light component with less cathode reflection.

To sum up the above steps, the present invention is to dissolve the polymer in an appropriate organic solvent ', and then coat the polymer solution on a flexible substrate. After drying, it is rolled up and the above steps are repeated, that is, A plurality of flexible substrates n provided with a polymer film 13 can be obtained, and then each of the flexible substrates n is transferred or transparently printed by a roller 15 to sequentially transfer the polymer film 13 from the flexible substrate 11 to a transparent conductive substrate. On the substrate 14, after the transfer of each polymer film 13 is completed, a metal semi-lens 16 is vapor-deposited on the polymer film 3, and then a transparent conductive layer η 'is sputtered on the metal semi-lens 16. Then, the cathode 18 is plated on the 4 transparent conductive layer 17 and finally, after encapsulating the element 1 g, a multilayer polymer electric excitation light element with reduced cathode reflection can be obtained.

In addition, the above-mentioned metal half-lens 16 may be an aluminum half-lens, and the thickness of the bean is about 5 to 25 ·, but its thickness must be controlled so that incident light can be reflected by about 50% to destroy the transparent conductive layer 17 The interference is completely extinct; the transparent conductive layer 17 is a transparent material with an amorphous phase, such as indium tin oxide (ιτο) or zinc oxide (Zn0), and its thickness is about 700 nm. The refractive index and thickness of the transparent material need to destructively interfere with the light reflected by the metal half-lens 16 and the cathode 18 to eliminate the reflection interference in the strong light environment. The cathode 8 is opaque. Metal

583893

Page 10 5. Description of the invention (6) Reflective layer. In summary, the light-emitting element has a higher production rate than the material, and the production speed and flexibility can be displayed. The above-mentioned changes and modifications are only described in the implementation of the invention. Combined with the advantages of high polymer production speed, the PLED multi-layer element with roll-to-roll-on-contrast ratio has great help to increase the amount of elements and good display effect, and the invention can be applied to the device. The invention is extremely convenient and practical. ^ This is only a preferred embodiment of the present invention and is not intended to limit the scope. That is, all equality made in accordance with the scope of patent application for the present invention is covered by the scope of patent for the invention. 583893 Brief description of the drawings [Simplified description of the drawings] FIG. 1 is a schematic diagram of the first step of the manufacturing method of the present invention. FIG. 2 is a schematic diagram of the second step of the manufacturing method of the present invention. Figure 4 of the three-step schematic diagram, which is a schematic diagram of the fourth step of the manufacturing method of the present invention. Figure 5, which is a schematic diagram of the fifth step of the manufacturing method of the present invention, and Figure 6, which is a schematic diagram of the sixth step of the manufacturing method of the present invention. Description] Flexible substrate ...... Coating machine ...... Polymer film ...... ........ Transparent conductive substrate .............. $ 衮 轮 ........ Metal half lens · ............ Transparent conductive layer ............ ··· mm ............... Package components ...... Μ τι ...... ... 11 12 13 14 1.5 16 17 18 19 21 22 4

Page 11

Claims (1)

583893 A method for manufacturing a multilayer polymer for reducing cathode reflection includes the following steps: a) First, a flexible substrate is fixed on a coating machine, the second son is dissolved in a suitable organic solvent towel, and then the coating door is On a flexible substrate; 卞, combined coating ^), after the above polymer solvent is dried, a polymer film on the flexible substrate is formed, and then the flexible C is repeated to obtain a plurality of A flexible substrate with a thin polymer layer is pasted, and then each flexible substrate is transferred by a roller or through-printing: · Sequentially transfer the Luannan molecular film from the flexible substrate to the transparent conductive substrate. 8d), each layer to be completed After the polymer film is transferred, the person then vaporizes a metal semi-lens on the high I-round film, and then X-layers a transparent conductive layer on the metal semi-lens, and then sputters a cathode on the transparent conductive layer; & e ) Finally, after encapsulating the component, a multilayer two-molecule electrically excited light component with reduced cathode reflection can be obtained. ^ 2 The method for manufacturing the multilayer of reducing cathode reflection as described in item 1 of the declared patent scope: a method for manufacturing t-electron excitation light elements, wherein the polymer solvent is made by spin coating, patterned roller coating, and screen printing , Doctor blade coating or φ pouting ink coating on the flexible substrate. ^ 3. The method for manufacturing the multilayer of reducing cathode reflection as described in item 1 of the scope of the patent claim = the manufacturing method of the molecular electrical excitation light element, wherein the softness of a plurality of polymer films attached in step (c) Substrate, polymer 583893 VI. Scope of patent application The film is heated to a temperature slightly higher than the softening temperature (T g point) of the polymer, which activates the polymer membrane. 4. The method for manufacturing a multilayer polymer electro-optical light-emitting element with reduced cathode reflection as described in item 1 of the scope of the patent application, wherein the flexible substrate described in step (C) can be transferred from the flexible substrate to the polymer film After the transparent conductive substrate is recovered, it can be reused. 5. The method for manufacturing a multilayer polymer electro-optically excited light element with reduced cathode reflection as described in item 1 of the scope of patent application, wherein the transparent conductive layer is a transparent material of an amorphous phase, and the transparent material of the amorphous phase Its refractive index and thickness need to destructively interfere with the light reflected by the metal half-lens and reflected by the cathode, in order to eliminate the reflection interference under strong light environment. ^ 6. The method for manufacturing a multilayered molecularly excited electro-optical element with reduced cathode reflection as described in item 5 of the scope of the patent application, wherein the transparent material of the amorphous phase may be indium tin oxide (IT0) or zinc oxide (Zn 〇). _ 7. The method for manufacturing a multilayer polymer electro-optically excited light element with reduced cathode reflection as described in item 5 of the scope of patent application, wherein the thickness of the transparent conductive layer is about 200 to 80 nm. Order 8. The method for manufacturing a multilayer n-molecule electrically excited light element with reduced cathode reflection as described in item 1 of the scope of patent application, wherein the thickness of the metal half-lens must be controlled so that incident light can be reflected by more than 50% to The destructive interference of the transparent conductive layer can be completely extinct. Ancient 9. The manufacturing method of the multi-directionally directed electro-excitation light-emitting element for reducing the reflection of the cathode as described in item 1 of the scope of the patent application, wherein the metal half lens may be an aluminum half lens. Page 13 583893 VI. Application for patent scope 10, The method for manufacturing a multilayer polymer electro-optical excitation light element with reduced cathode reflection as described in item 8 of the patent scope, wherein the thickness of the metal half lens is about 5 to 25 nm between. 11. The method for manufacturing a multi-layered polymer electro-optically excited light element with reduced cathode reflection as described in item 1 of the scope of the patent application, wherein the cathode is an opaque metal reflective layer. A polymer can be transferred to a substrate with a soft base after being softened, and then a liquid coating step is performed on the conductive layer to reflect light. Each flexible thin film is from a thin film lens, and the transparent little cathode reduces the cathodic reflection of the multilayer polymer electrical excitation. The light element is dissolved in an appropriate organic solvent, and then the polymer-soluble substrate is rolled up after being dried, and the above-mentioned multiple flexible substrates with polymer films are repeated, and then transferred by the roller Or through printing method 4, transfer the polymer 'board to the transparent conductive substrate in sequence, wait for 6 minutes after you get two points in each layer, and then the winner will win on the thin molecule. A layer of metal semi-jong metal semi-lens on Shangyan Mine is sputtered with a layer of transparent sputtered cathode, and finally sealed by f «, then Yu Xicheng Yi, clothing, you can get two molecular electrical excitation light element.