TWM625840U - Organic lighting module - Google Patents

Abstract

The present invention discloses an organic light-emitting module comprising a substrate, a first electrode, a second electrode, a first charge transport layer, a second charge transport layer, a light-emitting layer and a plurality of quantum dots. The first electrode is disposed on the substrate. The second electrode is disposed opposite to the first electrode. The first charge transport layer is disposed close to the first electrode. The second charge transport layer is disposed close to the second electrode. The light-emitting layer is disposed between the first charge transport layer and the second charge transport layer. The majority of quantum dots are optionally interspersed between or within the layer structures. The light emitted by the light-emitting layer can excite the majority of the quantum dots, thereby forming light colors with a full-color spectrum and a wide color gamut. By introducing quantum dots, the organic light-emitting module has better optical or electrical performance.

Description

organic light emitting module

The new model relates to a light-emitting module; more particularly, the new model relates to an organic light-emitting module combining organic light-emitting diodes and quantum dots.

So far, display devices have been rapidly developed and become important human-machine interfaces for electronic devices. Display devices, such as portable electronic devices, computers or televisions, have been able to provide complex information presentation.

Liquid crystal display devices (LCDs) are now popular and become mainstream based on the requirements for the viewing area, lightness, and power consumption of display devices. In a conventional liquid crystal display structure, a backlight module, a first polarizer, a first substrate, a transistor layer, a first electrode, a liquid crystal layer, and a second electrode are generally arranged from bottom to top , a color filter, a second substrate and a second polarizer. The overview and its operation principle are based on the characteristic that the liquid crystal molecules of the liquid crystal layer are twisted by voltage, and the twist direction of the liquid crystal molecules of the liquid crystal layer is controlled by one or more transistors in the transistor layer, as a switch for light passing. In addition, the light emitted by the backlight module passes through the cooperation of the first polarizer and the second polarizer to generate polarized light in different directions, so as to match the twist direction of the liquid crystal molecules to produce changes in brightness, thereby forming the desired gray. order. In order to form the required color light, a plurality of pixel units are usually set on the color filter, and each pixel The units correspond to different light colors to form images with different colors that are visible to the naked eye. In addition, an alignment film can be arranged on the first substrate and the second substrate to assist the twist recovery of the liquid crystal molecules in the liquid crystal layer. The voltage required by the transistor layer can be provided through the first electrode and the second electrode.

The above-mentioned liquid crystal display, because only a small part of the light emitted by the backlight module can penetrate the liquid crystal layer, the conversion efficiency is still low, and the brightness (contrast) is still insufficient. Furthermore, the transistor required to control the twist of the liquid crystal molecules has high manufacturing complexity, resulting in a still high manufacturing cost of the entire liquid crystal display device. Moreover, its viewing angle is also limited. Furthermore, the requirements for display effects are increasing day by day. The conventional method of forming full-color light is not only inefficient, but also has insufficient color gamut to generate light colors, which can no longer meet the demands for high resolution and high chroma of display devices.

Therefore, it is still necessary to develop display devices with low manufacturing cost, high luminous power and conversion efficiency, wide viewing angle, long lifespan, wide color gamut, and light, thin and portable display devices.

The novel system provides an organic light-emitting module, which incorporates quantum dot materials into the overall structure, and can obtain wide color gamut, high color uniformity and high color saturation by cooperating with the light color selection of the light-emitting layer. Furthermore, by virtue of the characteristics of organic materials, the organic light-emitting module of the present invention has high luminous power and conversion efficiency.

In one embodiment, the present invention provides an organic light-emitting module, which includes a substrate, a first electrode, a second electrode, a first charge transport layer, a second charge transport layer, a light-emitting layer, and a plurality of quantum dots . The first electrode is disposed on the substrate. The second electrode is disposed opposite to the first electrode. First charge transport layer setup close to the first electrode. The second charge transport layer is disposed close to the second electrode. The light-emitting layer is disposed between the first charge transport layer and the second charge transport layer. The majority of quantum dots are optionally disposed between the light-emitting layer and the first charge transport layer, between the light-emitting layer and the second charge transport layer, between the first charge transport layer and the first electrode, or between the second charge transport layer and the second charge transport layer. Between the electrodes, the plurality of quantum dots have a light color of red, green, blue or any combination of the foregoing colors. Wherein, a light emitted by the light-emitting layer excites the plurality of quantum dots to form a light color with a full-color spectrum.

In one embodiment, the substrate may be a transparent substrate.

In one embodiment, the first electrode or the second electrode may be a transparent electrode.

In one embodiment, the first electrode or the second electrode may be a reflective electrode.

In one embodiment, one of the first charge transport layer and the second charge transport layer is an electron transport layer, and the other is a hole transport layer.

In one embodiment, the first charge transport layer, the second charge transport layer and the light emitting layer may include organic materials.

In one embodiment, the light emitted by the light-emitting layer has a blue or a violet light color.

In one embodiment, the wavelength of light emitted by the light-emitting layer changes with the voltage applied between the first electrode and the second electrode.

In one embodiment, the plurality of quantum dots are stacked and arranged to form a plurality of pixel units corresponding to the visible image formed by the light emitted by the light-emitting layer.

In one embodiment, the present invention provides an organic light-emitting module, which includes a substrate, a first electrode, a second electrode, a first charge transport layer, a second charge transport layer, a light-emitting layer, and a plurality of quantum dots . first electrode setup on the substrate. The second electrode is disposed opposite to the first electrode. The first charge transport layer is disposed close to the first electrode. The second charge transport layer is disposed close to the second electrode. The light-emitting layer is disposed between the first charge transport layer and the second charge transport layer. The majority of quantum dots are optionally arranged in the light-emitting layer, the first charge transport layer or the second charge transport layer, and the majority of quantum dots have a light color of red, green, blue or any combination of the foregoing colors . Wherein, a light emitted by the light-emitting layer excites the plurality of quantum dots to form a light color with a full-color spectrum.

In one embodiment, the substrate may be a transparent substrate.

In one embodiment, the first electrode or the second electrode may be a transparent electrode.

In one embodiment, the first electrode or the second electrode may be a reflective electrode.

In one embodiment, one of the first charge transport layer and the second charge transport layer is an electron transport layer, and the other is a hole transport layer.

In one embodiment, the first charge transport layer, the second charge transport layer and the light emitting layer may include organic materials.

In one embodiment, the light emitted by the light-emitting layer has a blue or a violet light color.

In one embodiment, the wavelength of light emitted by the light-emitting layer changes with the voltage applied between the first electrode and the second electrode.

In one embodiment, the plurality of quantum dots are stacked and arranged to form a plurality of pixel units corresponding to the visible image formed by the light emitted by the light-emitting layer.

100: organic light-emitting module

101: Substrate

102: The first electrode

102a: Reflective Metal

103: the first charge injection layer

104: the first charge transport layer

105: Light-emitting layer

106: Second charge transport layer

107: Second charge injection layer

108: Second electrode

300: Quantum Dots

400: Quantum Dots

500: Quantum Dots

200: organic light-emitting module

201: Substrate

202: First electrode

203: the first charge injection layer

204: the first charge transport layer

205: Light Emitting Layer

206: Second charge transport layer

207: Second charge injection layer

208: Second electrode

300: Quantum Dots

400: Quantum Dots

500: Quantum Dots

S101, S102, S103, S104, S105, S106, S107: Steps

S201, S202, S203, S204, S205, S206, S207: Steps

FIG. 1 is a schematic structural diagram of an organic light-emitting module according to a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an organic light-emitting module according to a second embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an organic light-emitting module according to a third embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an organic light-emitting module according to a fourth embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an organic light-emitting module according to a fifth embodiment of the present invention;

FIG. 6 is a schematic structural diagram of an organic light-emitting module according to a sixth embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an organic light-emitting module according to a seventh embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an organic light-emitting module according to an eighth embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an organic light-emitting module according to a ninth embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an organic light-emitting module according to a tenth embodiment of the present invention;

FIG. 11 is a schematic structural diagram of an organic light-emitting module according to an eleventh embodiment of the present invention;

FIG. 12 is a schematic structural diagram of an organic light-emitting module according to a twelfth embodiment of the present invention;

FIG. 13 is a schematic flowchart of a method for manufacturing an organic light-emitting module according to a thirteenth embodiment of the present invention; and

FIG. 14 is a schematic flowchart of a method for manufacturing an organic light-emitting module according to a fourteenth embodiment of the present invention.

Several embodiments of the present invention will be described below with reference to the drawings. For the sake of clarity, many practical details are set forth in the following description. It should be understood, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the novel, these practical details are unnecessary. In addition, in order to simplify the drawings and focus on the main technical features of the present application, some conventional, non-essential structures and elements will be shown in a simple and schematic manner or omitted in the drawings. Also, similar elements may be designated by the same reference numerals.

In this new model, the terms "first", "second", "up", "down" and "between" are used to describe a relative position. In fact, according to the actual situation, the possibility of changing the arrangement order is not excluded. For example, when the substrate is located on the top layer, the other layers may be arranged to extend downward, and the relative positional relationship of “first”, “second”, “upper” and “lower” may also change accordingly.

Please refer to Figure 1, Figure 2 and Figure 3 together. FIG. 1 is a schematic structural diagram of an organic light emitting module 100 according to a first embodiment of the present invention. FIG. 2 is a schematic diagram showing the structure of the organic light emitting module 100 according to the second embodiment of the present invention. FIG. 3 is a schematic diagram showing the structure of the organic light emitting module 100 according to the third embodiment of the present invention. The organic light-emitting module in Fig. 1, Fig. 2 and Fig. 3 100 has a similar structure. Therefore, the material and function of each structure in the organic light emitting module 100 will be described with reference to FIG. 1 first, and then the differences between FIG. 1, FIG. 2 and FIG. 3 will be described.

Please refer to Figure 1. The organic light emitting module 100 includes a substrate 101, a first electrode 102, a second electrode 108, a first charge transport layer 104, a second charge transport layer 106, a light emitting layer 105, and a plurality of quantum dots 300, 400, 500. The first electrode 102 is disposed on the substrate 101 . The second electrode 108 is disposed opposite to the first electrode 102 . The first charge transport layer 104 is disposed close to the first electrode 102 . The second charge transport layer 106 is disposed close to the second electrode 108 . The light-emitting layer 105 is disposed between the first charge transport layer 104 and the second charge transport layer 106 .

Most of the quantum dots 300 , 400 and 500 can be freely arranged between the light-emitting layer 105 and the first charge transport layer 104 , between the light-emitting layer 105 and the second charge transport layer 106 , the first charge transport layer 104 and the first electrode Between 102 or between the second charge transport layer 106 and the second electrode 108, depending on the required structure of the overall organic light emitting module 100, it varies. In the following, the principle of setting the positions of most quantum dots 300, 400 and 500 in the present invention will be explained.

The quantum dots 300, 400, 500 are small semiconductor crystals with dimensions down to nanometers. Their properties are very different from bulk semiconductors. The most notable feature of quantum dots 300, 400, 500 is the tuning of the semiconductor band gap by changing their size and discrete energy levels (the so-called Quantum Confinement Effect). Furthermore, when the quantum dots 300, 400, 500 are applied to a display, a narrower spectrum can be obtained based on their narrow emission linewidth (eg, emission at half maximum width (FWHM) of about 20 to 30 nanometers). Very high color saturation with narrow spectrum to cover the strictest Rec.2020 color gamut The accuracy is more than 90%, so a wide color gamut visual effect can be obtained. The narrow emission linewidths of quantum dots 300, 400, 500 also make them well suited as LED active components in high-definition displays such as 8K and higher resolutions.

The materials of the quantum dots 300, 400, and 500 may include II-VI group element compounds, III-V group element compounds, perovskite quantum dots, compounds composed of the above-mentioned II-VI group element compounds and/or III-V group elements Core-shell structure compound or doped nanocrystalline particles formed by coating with elemental compound. Among them, the II-VI group elements may include cadmium selenide (CdSe), cadmium telluride (CdTe), magnesium sulfide (MgS), magnesium selenide (MgSe), magnesium telluride (MgTe), calcium sulfide (CaS), selenium Calcium (CaSe), calcium telluride (CaTe), strontium sulfide (SrS), strontium selenide (SrSe), strontium telluride (SrTe), barium sulfide (BaS), barium selenide (BaSe), barium telluride ( BaTe), zinc sulfide (ZnS), zinc selenide (ZnSe), zinc telluride (ZnTe) or cadmium sulfide (CdS), etc.; III-V group element compounds may include gallium nitride (GaN), gallium phosphide (GaP) ), gallium arsenide (GaAs), indium nitride (lnN), indium phosphide (lnP) or indium arsenide (InAs), etc., but not limited to the above materials.

The first electrode 102 can be used as an anode, and can be composed of a material with a high work function, which can drive holes to be injected into the light-emitting layer 105 . In several embodiments, the first electrode 102 may be composed of a transparent oxide, which may include, for example, copper tin oxide (ITO), copper oxide, indium zinc oxide (IZO), or other materials with similar properties. The first electrode 102 can be formed on the substrate 101 by various chemical methods (eg, chemical vapor deposition, vapor epitaxy, etc.) or physical methods (eg, evaporation, sputtering, spin coating, transfer printing, electroplating, etc.).

The first charge transport layer 104 is disposed close to the first electrode 102 . The first charge transport layer 104 is used to enhance the transport of holes, and generally can be "hole transport". layer" is called. The first charge transport layer 104 may be composed of inorganic or organic materials having properties similar to P-type semiconductors, but not limited thereto. In the organic light emitting module 100 of the present invention, the first charge transport layer 104 can be composed of organic materials, so as to obtain the advantages of material properties. For example, when the first charge transport layer 104 is selected to be composed of high molecular weight polymer materials such as POT, PSS, PPV, PVK, TFB, PFB or poly-TPD, it can have strong resistance to oxygen or moisture, Thus, the life cycle of the overall organic light emitting module 100 is improved. The first charge transport layer 104 also contributes to the electrical operation of the overall organic light emitting module 100 , such as reducing the startup voltage (initial operating voltage). The first charge transport layer 104 can be formed on the first charge transport layer 104 by various chemical methods (eg, chemical vapor deposition, vapor epitaxy, etc.) or physical methods (eg, evaporation, sputtering, spin coating, transfer printing, electroplating, etc.). on electrode 102.

Because the highest occupied molecular orbital (Highest Occupied Molecular Orbital, HOMO) value of the first charge transport layer (hole transport layer) 104 may still be different from that of the first electrode (anode) 102, and if the first electrode 102 is selected Transparent oxide (eg: ITO) is the main material, and after long-term operation, oxygen may still be released, thus destroying the organic layer. Therefore, in another way, between the first electrode 102 and the first charge transport layer 104, a first charge injection layer (hole injection layer) 103 can be inserted, and its HOMO value is between the first electrode 102 and the first charge transport layer Between the layers 104 , holes can be injected into the light-emitting layer 105 , and by virtue of its material properties, the oxygen released from the first electrode 102 can be blocked from entering the structure of the organic light-emitting module 100 , thereby prolonging the life of the device. However, it should be noted that the first charge injection layer 103 may or may not be added depending on the actual situation, and is not necessarily used. When the first charge injection layer 103 is not added, the first charge transport layer 104 is directly disposed on the first electrode 102 .

The second charge transport layer 106 is disposed close to the second electrode 108 . The second charge transport layer 106 is used to enhance the transport of electrons, and is generally referred to as an "electron transport layer". The second charge transport layer 106 may be composed of, but not limited to, inorganic or organic materials having properties similar to n-type semiconductors. For example, the second charge transport layer 106 may include metal oxides with similar material properties such as TiO ₂ , ZrO ₂ , inorganic materials with similar properties to S ₃ N ₄ , or n-type semiconductors or polymers. Material properties of inorganic or organic semiconductor materials. In the organic light emitting module 100 of the present invention, the second charge transport layer 106 can be composed of organic materials to obtain the advantages of material properties. When the above-mentioned inorganic materials or organic polymers are selected, damage to the structure of the organic light emitting module 100 caused by oxidation or corrosion can be avoided. The second charge transport layer 106 also contributes to the electrical operation of the overall organic light emitting module 100 , such as reducing the startup voltage (initial operating voltage). The second charge transport layer 106 can be formed on the light-emitting layer by various chemical methods (eg, chemical vapor deposition, vapor phase epitaxy, etc.) or physical methods (eg, evaporation, sputtering, spin coating, transfer printing, electroplating, etc.) 105 on.

The second electrode 108 can act as a cathode, and can be composed of a low work function material, which can drive electrons to be injected into the light emitting layer 105 . In several embodiments, the second electrode 108 may be made of metals such as Ca, Mg, K, Ti, In, Yt, Li, Gd, Al, Ag, Sn, Pb, Cs, Ba or metals such as LiF/Al, LiO ₂ / Alloy composition of Al, LiF/Ca, BaF ₂ /Ca, etc. Alternatively, a second charge injection layer (electron injection layer) 107 can be added between the second electrode 108 and the second charge transport layer 106, which can be formed as a very thin low work function metal halide or oxide , such as LiF or LiO ₂ , can greatly reduce the energy barrier between the cathode and the electron transport layer, reducing the driving voltage. The second electrode 108 can also be formed on the second electric charge by various chemical methods (eg, chemical vapor deposition, vapor epitaxy, etc.) or physical methods (eg, evaporation, sputtering, spin coating, transfer printing, electroplating, etc.) on the injection layer 107 . However, it should be noted that the first charge injection layer 103 may or may not be added depending on the actual situation, and is not necessarily used. When the second charge injection layer 107 is not added, the second electrode 108 is directly disposed on the second charge transport layer 106 .

It is known that the holes driven by the first electrode 102 and the electrons driven by the second electrode 108 can combine to form excitons and emit light through the transport of the first charge transport layer 104 and the second charge transport layer 106 respectively. It is generally understood that the luminous efficiency may depend on the material properties of the first charge transport layer 104 and the second charge transport layer 106 . However, the choice of materials for the first charge transport layer 104 or the second charge transport layer 106 may still be limited, as a balance between electrical properties and light-emitting properties must be taken into account, which may reduce the light-emitting efficiency. In order to compensate for the error in material selection as much as possible, the current practice is to provide a light-emitting layer 105 between the first charge transport layer 104 and the second charge transport layer 106 . The light-emitting layer 105 has an area where electron-hole pairs can combine to emit light, and studies have found that the selection of permeable materials enables the light-emitting layer 105 to also have the ability to transport electrons or holes. Therefore, the light-emitting layer 105 can be adjusted by adjusting the Material properties increase luminous efficiency. The light-emitting layer 105 can also add dopant to change the color of the light emitted by the light-emitting layer 105 .

FIG. 1 , FIG. 2 , and FIG. 3 show a top emission type organic light emitting module 100 in the embodiment. In other words, the light emitted from the light-emitting layer 105 penetrates upward through the second charge transport layer (electron transport layer) 106 , the second charge injection layer (electron injection layer) 107 and the second electrode (cathode) 108 out. Since the light-emitting layer 105 emits light in all directions, it is still possible that part of the light penetrates down through the first charge transport layer (hole transport layer) 104 and the first charge injection layer (hole injection layer) 103 to the first electrode 102. In order to improve the light extraction efficiency, the first electrode 102 may include a highly reflective metal 102a to reflect the light reaching the first electrode 102 to change the light extraction path so that the light extraction path is upward. At this time, the first electrode 102 has the function of reflecting light and acts as a reflective electrode, and the second electrode 108 acts as a transparent electrode by reducing its thickness to increase its transmittance.

Most quantum dots 300, 400, 500 can have a light color of red, green, blue, or any combination of the foregoing. The light emitted by the light-emitting layer 105 can excite the quantum dots 300 , 400 and 500 to form light colors with full color spectrum. In other words, the quantum dots 300, 400 and 500 have the effect of converting light color. The light emitted by the light-emitting layer 105 is finally presented to the human eye to form a color image. Understandably, a color image is composed of a plurality of pixels. Therefore, the above-mentioned quantum dots 300 , 400 and 500 can be stacked and arranged to form a plurality of pixel units corresponding to the visible image formed by the light emitted by the light-emitting layer 105 . The quantum dots 300 , 400 and 500 in different arrangements can form pixel units in different arrangements to form different color saturations. For example, the quantum dots 300 , 400 and 500 can be arranged in a square array, a triangular array or a mosaic array to form pixel units of different arrangement forms to obtain different color rendering effects. In different embodiments, the light emitting layer 105 can emit light of blue, purple or other colors, and can also be converted into different light colors through the quantum dots 300 , 400 and 500 of different colors. Through the use of quantum dots 300, 400 and 500, the organic light emitting module 100 has high photoluminescence efficiency, high conversion efficiency, high photostability, solution processability, low manufacturing cost and color tunability, so that it can be used for high-definition micro organic LEDs. Display devices provide a powerful full-color solution case. In this novel embodiment, the quantum dots 300 are red quantum dots, the quantum dots 400 are green quantum dots, and the quantum dots 500 are blue quantum dots, but not limited thereto.

The quantum dots 300, 400, 500 can be in the form of particles, and the particle diameter can be between 1 nanometer to 10 nanometers, and the weight ratio of each quantum dot 300, 400, 500 can be adjusted differently to form different pixels unit.

The stacking arrangement of the quantum dots 300, 400 and 500 can be formed by methods such as chemical colloidal method, self-assembly method, lithography and etching or split method. -gate approach) etc. The multi-layered quantum dots 300, 400 and 500 can be fabricated through chemical sol method synthesis, which is simple and suitable for mass production. The self-assembly method can use a chemical vapor deposition process to make the quantum dots 300, 400, 500 self-aggregate on the surface of a specific substrate, and can mass-produce regularly arranged quantum dots 300, 400 , 500. The lithography and etching method uses a beam or an electron beam to directly etch the desired pattern on the substrate. The split-gate approach generates a two-dimensional confinement on the plane of the two-dimensional quantum well by applying a voltage, which can change the shape and size of the quantum dots 300 , 400 and 500 .

In order to enable the light emitted by the light-emitting layer 105 to excite the quantum dots 300, 400, and 500 to convert the light color, correspondingly form a pixel unit with red, green, blue or any combination of the foregoing colors, thereby forming a full-color image And through the narrow emission line width of the quantum dots 300, 400, 500, uniform light emission and wide color gamut are formed, so the setting position of the quantum dots 300, 400, 500 can be adjusted to achieve different light emitting effects. In Figure 1, the red quantum dots 300 and the green quantum dots are The dots 400 and the blue quantum dots 500 are arranged between the light-emitting layer 105 and the second charge transport layer 106; in the second figure, the red quantum dots 300, the green quantum dots 400 and the blue quantum dots 500 are arranged on the first Between the two charge transport layers 106 and the second charge injection layer (electron injection layer) 107; in Figure 3, red quantum dots 300, green quantum dots 400 and blue quantum dots 500 are arranged on the two charge injection layers ( between the electron injection layer) 107 layer and the second electrode 108. Therefore, according to actual process requirements, the quantum dots 300 , 400 and 500 of various colors can be arranged at different positions on the light output path of the light to achieve different light output effects. Furthermore, in one embodiment, the wavelength of the light emitted by the light-emitting layer 105 can be changed with the change of the voltage applied between the first electrode 102 and the second electrode 108 , so that the wavelength of the light emitted by the quantum dots 300 , 400 and 500 of each color can be changed. Inspire efficiency. This is because the different color quantum dots 300, 400, 500 have different responses to the wavelength of the excitation light source, and with the change of the applied voltage, the wavelength of the light emitted by the light-emitting layer 105 will be blue-shifted (wavelength peak shifts to short wavelengths) Or the change of red shift (the shift of the wavelength peak to the long wavelength), so the excitation efficiency of the quantum dots 300, 400 and 500 of each color also changes accordingly.

Please refer to Figure 4, Figure 5 and Figure 6 together. FIG. 4 is a schematic structural diagram of an organic light-emitting module 200 according to a fourth embodiment of the present invention; FIG. 5 is a schematic structural diagram of an organic light-emitting module 200 according to a fifth embodiment of the present invention; A schematic diagram of the structure of the organic light emitting module 200 according to the sixth embodiment of the present invention is shown.

In the embodiment shown in FIG. 4 , FIG. 5 and FIG. 6 , it is shown as a bottom emission type organic light emitting module 200 . Similar to the organic light emitting module 100 in the aforementioned FIGS. 1 , 2 and 3, the organic light emitting module 200 also includes a substrate 201 , a first electrode 202 , a second electrode 208 , a first electrode The charge transport layer 204 , a second charge transport layer 206 , a light emitting layer 205 and a plurality of quantum dots 300 , 400 and 500 . The first electrode 202 is disposed on the substrate 201 . The second electrode 208 is disposed opposite to the first electrode 202 . The first charge transport layer 204 is disposed close to the first electrode 202 . The second charge transport layer 206 is disposed close to the second electrode 208 . The light-emitting layer 205 is disposed between the first charge transport layer 204 and the second charge transport layer 206 . In addition, a first charge injection layer (hole injection layer) 203 is also selectively disposed between the first electrode 202 and the first charge transport layer 204; and a second charge injection layer (electron injection layer) 207 is disposed on the between the second electrode 208 and the second charge transport layer 206 . The main difference between the organic light-emitting module 200 and the organic light-emitting module 100 is that the light emitted from the light-emitting layer 205 penetrates downward through the first charge transport layer (hole transport layer) 204 and the first charge injection layer (hole injection layer). layer) 203, the first electrode (anode) 202 and the substrate 201. At this time, the first electrode (anode) 202 serves as a transparent electrode, and the substrate 201 serves as a transparent substrate for the light emitted by the light-emitting layer 205 to penetrate. Since the light emitting layer 205 emits light in all directions, it is still possible that some light rays penetrate upward through the second charge transport layer (electron transport layer) 206 and the second charge injection layer (electron injection layer) 207 to the second electrode 208 . In order to improve the light extraction efficiency, the second electrode 208 may include a highly reflective metal or increase its thickness, so as to reflect the light reaching the second electrode 208 and change the light output path, so that the light output path faces downward. At this time, the second electrode 208 has the function of reflecting light, and acts as a reflecting electrode.

In order to enable the light emitted by the light-emitting layer 205 to excite the quantum dots 300, 400, and 500 to convert the light color, correspondingly form a pixel unit with red, green, blue or any combination of the aforementioned colors, thereby forming a full-color image image, and through the characteristics of the narrow emission line width of quantum dots 300, 400, 500, forming a uniform emission Light and wide color gamut, so adjust the setting positions of quantum dots 300, 400, 500 to achieve different lighting effects. In the fourth figure, the red quantum dots 300, the green quantum dots 400 and the blue quantum dots 500 are arranged between the light-emitting layer 205 and the first charge transport layer 204; in the fifth figure, the red quantum dots 300, The green quantum dots 400 and the blue quantum dots 500 are disposed between the first charge transport layer 204 and the first charge injection layer (hole injection layer) 203; in Figure 6, the red quantum dots 300 and the green quantum dots are 400 and blue quantum dots 500 are disposed between the first charge injection layer (hole injection layer) 203 and the first electrode 202 . Therefore, according to actual process requirements, the quantum dots 300 , 400 and 500 of various colors can be arranged at different positions on the light output path of the light to achieve different light output effects. Similarly, in one embodiment, the wavelength of the light emitted by the light-emitting layer 205 can be changed with the voltage applied between the first electrode 202 and the second electrode 208 , so that the wavelength of the light emitted by the quantum dots 300 , 400 and 500 of each color can be changed. Inspire efficiency.

Please refer to Figure 7, Figure 8 and Figure 9 together. FIG. 7 is a schematic diagram showing the structure of the organic light-emitting module 100 according to the seventh embodiment of the present invention; FIG. 8 is a schematic diagram showing the structure of the organic light-emitting module 100 according to the eighth embodiment of the present invention; A schematic diagram of the structure of the organic light emitting module 100 according to the ninth embodiment of the present invention is shown.

The structure of the organic light emitting module 100 in FIGS. 7 , 8 and 9 is similar to the structure of the organic light emitting module 100 in FIGS. 1 , 2 and 3 for the most part, and both belong to the top-emission type structure. Therefore only the differences will be explained, and the same numbers will also be used to refer to similar elements. As mentioned above, the present invention introduces quantum dots 300, 400, 500 of different colors into the structure of the organic light-emitting module 100 to obtain better light conversion efficiency and color characteristics (eg, higher color saturation) brightness, luminous uniformity and wider color gamut). The difference is that, in the organic light emitting module 100 in Fig. 1, Fig. 2 and Fig. 3, the quantum dots 300, 400, 500 are arranged between the layers in the structure, while Fig. 7, Fig. 8 and Fig. 3 In the organic light-emitting module 100 shown in Figure 9, the quantum dots 300, 400, and 500 are arranged in each layer of the structure. For example, in Figure 7, the quantum dots 300, 400, and 500 are arranged in the light-emitting layer 105; in Figure 8, the quantum dots 300, 400, and 500 are arranged in the second charge transport layer 106; and In FIG. 9 , the quantum dots 300 , 400 and 500 are provided in the second charge injection layer (electron injection layer) 107 . Compared with the way of disposing the quantum dots 300 , 400 and 500 between the layers in the structure, disposing the quantum dots 300 , 400 and 500 in each layer in the structure can achieve different light extraction effects.

Please refer to Figure 10, Figure 11 and Figure 12 together. FIG. 10 is a schematic structural diagram of an organic light-emitting module 200 according to a tenth embodiment of the present invention; FIG. 11 is a schematic structural diagram of an organic light-emitting module 200 according to an eleventh embodiment of the present invention; and FIG. 12 It is a schematic diagram showing the structure of the organic light emitting module 200 according to the twelfth embodiment of the present invention.

The structure of the organic light emitting module 200 in FIGS. 10 , 11 and 12 is mostly similar to the structure of the organic light emitting module 200 in FIGS. 4 , 5 and 6 , and both belong to the bottom-emission structure. Therefore only the differences will be explained, and the same numbers will also be used to refer to similar elements. As mentioned above, the present invention introduces quantum dots 300, 400, 500 of different colors into the structure of the organic light-emitting module 200 to obtain better light conversion efficiency and color characteristics (for example, higher color saturation, luminous uniformity and wider color gamut). The difference is that, in the organic light emitting module 200 shown in Figs. 4, 5 and 6, the quantum dots 300, 400 and 500 are arranged between the layers in the structure, while Fig. 10, Fig. 11 and Fig. 12 in the picture In the organic light-emitting module 200 , the quantum dots 300 , 400 and 500 are arranged in each layer of the structure. For example, in Figure 10, the quantum dots 300, 400, and 500 are arranged in the light-emitting layer 205; in Figure 11, the quantum dots 300, 400, and 500 are arranged in the first charge transport layer 204; and In FIG. 12 , the quantum dots 300 , 400 and 500 are arranged in the first charge injection layer (hole injection layer) 203 . Compared with the way of disposing the quantum dots 300 , 400 and 500 between the layers in the structure, disposing the quantum dots 300 , 400 and 500 in each layer in the structure can achieve different light extraction effects.

Please refer to Figure 13 and Figure 14 together. FIG. 13 is a schematic flow chart illustrating a method for manufacturing an organic light emitting module according to the thirteenth embodiment of the present invention; and FIG. 14 is a schematic flowchart illustrating a manufacturing method for an organic light emitting module according to the fourteenth embodiment of the present invention.

As shown in FIG. 13, the method for manufacturing an organic light emitting module includes the following steps: step S101 is to provide a substrate; step S102 is to provide a first electrode, which is arranged on the substrate; step S103 is to provide a first charge transport layer, It is arranged on the first electrode; Step S104 is to provide a light-emitting layer, and it is arranged on the first charge transport layer; Step S105 is to provide a second charge transport layer, and it is arranged on the light-emitting layer; Step S106 is to provide A second electrode is disposed on the second charge transport layer; in step S107, a plurality of quantum dots are provided, and the plurality of quantum dots are disposed between the light-emitting layer and the first charge transport layer, the light-emitting layer and the between the second charge transport layers, between the first charge transport layer and the first electrode, or between the second charge transport layer and the second electrode.

In Fig. 13, where most of the quantum dots are arranged between the layers of the organic light emitting module will depend on the actual process conditions. For example, if the organic light-emitting mode If the group belongs to the top-emission type structure, most quantum dots are disposed between the light-emitting layer and the second charge transport layer or between the second charge transport layer and the second electrode by means of dispersion; if the organic light-emitting module belongs to the bottom-emission type structure , most quantum dots are disposed between the light-emitting layer and the first charge transport layer or between the first charge transport layer and the first electrode by means of scattering.

As shown in FIG. 14, the method for manufacturing an organic light emitting module includes the following steps: step S201 is to provide a substrate; step S202 is to provide a first electrode, which is arranged on the substrate; step S203 is to provide a first charge transport layer, to It is arranged on the first electrode; Step S204 is to provide a light-emitting layer, and it is arranged on the first charge transport layer; Step S205 is to provide a second charge transport layer, and it is arranged on the light-emitting layer; Step S206 is to provide A second electrode is disposed on the second charge transport layer; step 207 is to provide a plurality of quantum dots, and the plurality of quantum dots are disposed in the light-emitting layer, in the first charge transport layer or in the second in the charge transport layer.

In Fig. 14, the layer in which most of the quantum dots are arranged in the organic light emitting module will depend on the actual process conditions. For example, if the organic light-emitting module is a top-emission type structure, most quantum dots are disposed in the light-emitting layer or the second charge transport layer by means of dispersion; if the organic light-emitting module is a bottom-emission type structure, most quantum dots The dots are disposed in the light emitting layer or in the first charge transport layer by means of scattering.

As shown in Fig. 13 and Fig. 14 above, the dispersion method can be, for example, a chemical colloidal method, a self-assembly method, a lithography and etching method, or a split-gate method. gate approach), chemical vapor deposition, vapor phase epitaxy, evaporation, sputtering, spin coating, transfer printing, electroplating and other chemical or physical methods law for it. Therefore, it can be seen that the organic light-emitting module proposed by the present invention can use various well-developed process methods to introduce quantum dots into the structure, without the need to develop a new process, and can greatly reduce the manufacturing cost.

According to the above, the organic light emitting modules 100 and 200 disclosed in the present invention can simplify the complicated backlight control elements and reduce the manufacturing cost. Furthermore, the quantum dots 300, 400 and 500 are introduced into the structure of the organic light-emitting modules 100 and 200. Through the material properties of the quantum dots 300, 400 and 500, the organic light-emitting modules 100 and 200 disclosed in the present invention have high conversion efficiency. , wider viewing angle, wider color gamut and longer life cycle.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the appended patent application.

100: organic light-emitting module

101: Substrate

102: The first electrode

102a: Highly reflective metal

103: the first charge injection layer

104: the first charge transport layer

105: Light-emitting layer

106: Second charge transport layer

107: Second charge injection layer

108: Second electrode

300: Quantum Dots

400: Quantum Dots

500: Quantum Dots

Claims (18)

An organic light-emitting module, comprising: a substrate; a first electrode disposed on the substrate; a second electrode disposed opposite to the first electrode; a first charge transport layer disposed close to the first electrode; a second charge transport layer disposed close to the second electrode; a light-emitting layer disposed between the first charge transport layer and the second charge transport layer; and A plurality of quantum dots, the quantum dots are optionally disposed between the light-emitting layer and the first charge transport layer, between the light-emitting layer and the second charge transport layer, the first charge transport layer and the first electrode between or between the second charge transport layer and the second electrode; The quantum dots have a light color of red, green, blue or any combination of the foregoing colors, and a light emitted by the light-emitting layer excites the quantum dots to form a light color with a full-color spectrum. The organic light-emitting module according to the claim 1, wherein the substrate is a transparent substrate. The organic light emitting module as described in claim 1, wherein the first electrode or the second electrode is a transparent electrode. The organic light-emitting module as described in claim 1, wherein the first electrode or the second electrode is a reflective electrode. The organic light-emitting module of claim 1, wherein one of the first charge transport layer and the second charge transport layer is an electron transport layer, and the other is a hole transport layer. The organic light-emitting module of claim 1, wherein the first charge transport layer, the second charge transport layer and the light-emitting layer comprise organic materials. The organic light-emitting module as described in claim 1, wherein the light emitted by the light-emitting layer has a blue or a violet light color. The organic light-emitting module as claimed in claim 7, wherein the wavelength of the light emitted by the light-emitting layer changes as the voltage applied between the first electrode and the second electrode changes. The organic light-emitting module of claim 1, wherein the quantum dots are stacked and arranged to form a plurality of pixel units corresponding to a visible image formed by the light emitted by the light-emitting layer. An organic light-emitting module, comprising: a substrate; a first electrode disposed on the substrate; a second electrode disposed opposite to the first electrode; a first charge transport layer disposed close to the first electrode; a second charge transport layer disposed close to the second electrode; a light-emitting layer disposed between the first charge transport layer and the second charge transport layer; Most quantum dots, the quantum dots are optionally disposed in the light-emitting layer, the first charge transport layer or the second charge transport layer, and the quantum dots have a red, a green, a blue or Light color of any combination of the aforementioned colors; Wherein the light emitting layer emits a light to excite the quantum dots to form a light color with a full color spectrum. The organic light-emitting module of claim 10, wherein the substrate is a transparent substrate. The organic light emitting module of claim 10, wherein the first electrode or the second electrode is a transparent electrode. The organic light-emitting module of claim 10, wherein the first electrode or the second electrode is a reflective electrode. The organic light-emitting module of claim 10, wherein one of the first charge transport layer and the second charge transport layer is an electron transport layer, and the other is a hole transport layer. The organic light-emitting module of claim 10, wherein the first charge transport layer, the second charge transport layer and the light-emitting layer comprise organic materials. The organic light-emitting module of claim 10, wherein the light emitted by the light-emitting layer has a blue or a purple light color. The organic light-emitting module of claim 16, wherein the wavelength of the light emitted by the light-emitting layer changes with the voltage applied between the first electrode and the second electrode. The organic light-emitting module of claim 10, wherein the quantum dots are stacked and arranged to form a plurality of pixel units corresponding to a visible image formed by the light emitted by the light-emitting layer.

Images