TWI306724B - Organic electroluminescent device and method of fabricating the same - Google Patents

Description

1306724 V. INSTRUCTION DESCRIPTION OF THE INVENTION (1) The present invention is based on the Korean Patent Application No. P200 1-52309, which is incorporated herein by reference. FIELD OF THE INVENTION The present invention relates to an organic electroluminescent display (ELD), particularly an organic electroluminescent display device. The organic electroluminescent display device has a high color purity. And having a low driving current (1〇w driving current) ° BACKGROUND OF THE INVENTION Generally, an organic electroluminescent display device (ELD) uses an organic material which has a fluorescent or phosphorescent High emission efficiency; therefore, the band gaps of organic materials can grow through molecular design and synthesis. Furthermore, organic electroluminescent display devices (ELD) can be used in glass and plastic due to their low manufacturing temperature. Manufactured on a substrate. The first figure is a cross section of an organic electroluminescent display device according to the prior art. In the first figure, an organic electroluminescent display device (ELD) 1 includes: a first electrode 12, a second electrode (second electrode) 14 'and an organic layer 〇rganic layer 16 therebetween. Electrons and holes are injected through a first electrode 12 and a second electrode 14 respectively. Organic layer 16

1306724 V. DESCRIPTION OF THE INVENTION (2) A hole transporting layer (HTL) 16a, the hole transport layer is in contact with a first electrode 12, an electron transport layer (ETL) 16c and A second electrode 14 is in contact with an emission material layer (EML) 16b, and the emission material layer is interposed between a hole transporting layer (HTL) 16a and an electron transport layer (electron transporting layer, ETL) 16c; an emission material layer (EML) 16b is an organic electroluminescent layer that emits light by applying an electric field. In the organic electroluminescent display device (ELD), electrons and holes are injected through a first electrode 12 and a second electrode 14 to form an exciton. When the exciter falls from the excited state to the ground state, the light is emitted. Furthermore, when the ratio of each injected charge "produced photons increases, the driving voltage drops. The reason is the hole transporting layer (HTL) 16a and the electron transporting layer (ETL) 16c. Since the carrier is injected through the two-step implantation process using the transport layer, the driving voltage is lowered. Furthermore, when electrons and holes are injected into the emitter material layer (EML) 16b and moved to the opposite electrode, recombination adjustment is performed because of electrons ( Electrons) and holes are blocked by the opposite transporting layer.

Page 6 1306724

Therefore, the luminescent efficiency is increased. In the case of a display device, an organic electroluminescence display device (ELD) 1 is formed on a large-area substrate having a plurality of pixel regions (the pixel region is composed of red (R), green (G), Blue (B) sub-pixei regions, and further, different organic materials are applied to each pixel region to achieve different colors. The second figure is a cross section of a full color organic electroluminescent display device (ELD) according to the prior art. In the second figure, the passive matrix organic electroluminescent display device (ELD) includes a first electrode (first eiec tr〇de 32, the first electrode 32 is formed on the substrate 3 in the first direction, and the plurality of organic layers 34 are formed on the first electrode 32. The second electrode 36 is formed on the organic layer 34 of the plurality of layers, /σ is in the second direction, spanning the first electrode 32, thus defining pixel regions Rp, Gp and Bp. Multilayer organic layer 34 consisting of holes

a hole induced layer (HIL) 34a, an HTL 34b, an EML 34c and an ETL 34d, the multilayer organic layer 34 and the second electrode system are formed 'to facilitate each of the pixel regions Rp, Gp, Bp, along the second The direction extends. The third figure shows the energy state diagram of the luminescent material according to the conventional art. In the second diagram, the emission of light occurs when excitons (excjt〇n) fall into the ground state, and the excitons are injected into each other from the first and second electrodes due to individual electron-hole pairs (combination After the electron-hole pair has a spin quantum number (spin, S) with S=l/2 combined into an exciton, the single exciton (exCit〇n) 20 has a spin quantum number of S = 0 And the triple exciton 22 has a spin quantum number of S=1,

1306724 V. Description of invention (4) Produced in a ratio of 1 to 3. In a single exciton (excit〇n) 2〇, the two-rotation quantum number is inversely symmetric' and in the triple exciton 22, the two-spinned sub-system is symmetric; even the double exciton 22 Because of the mutual interaction, and having a lower energy than the single exciton 20, the transition from a single exciton 2 () to a triple exciton 22, Basically forbidden 'because of changing the spin quantum number, however, a single exciton (excii; 〇n) 2〇 may actually migrate to the 丨J triplet exciton due to the spin-orbit coupling. Exciton) 22. Because of the ground state of the organic molecule, the 24 series single-single 'singlet' is banned from the triple exciton 22 to the ground state 24; It is said that the exci ton 2〇 migrates to the ground state of the exciton 20 and emits fluorescence. However, the triple exciton 22 may be substantially Perturbation, migrating to the ground state 24 of a single exciton (excit〇n) and emitting a phosphorescent, such as spin-orbit coupling, thus using fluorescence ( Fluorescent organic electroluminescent display device ^!^), triple exciton does not cause all luminescence 'Results' 光 ( (ph〇Sph〇rescent) material uses triple excitons (triple Exciton) will be more energy efficient and have a longer life. Conventional organic electroluminescent display device (organic

Page 8 1306724 V. Inventive Note (5) -- Electroluminescent display, Eld) often uses fluorescent materials for EML. However, the fluorescent material EML does not have sufficient luminescent efficiency, in particular, since the organic materials for R, G, B have different luminescent efficiencies, the monochromatic EML ratio when driven at the same current Other color EMLs have lower iuminescent efficiency. Therefore, the luminescent efficiency of the EML is increased by increasing the driving current of the EML, so that the full color ELD can maintain sufficient white purity, which is limited by the high driving. Current, high power consumption is a problem. SUMMARY OF THE INVENTION Accordingly, the present invention is directed to an organic electroluminescent display (ELD), and a method of fabricating the same, which substantially avoids the limitations of the prior art Or the problem caused by the shortcomings. SUMMARY OF THE INVENTION An object of the present invention is to provide a full color organic electroluminescent display device using a phosphorescent material to achieve at least one color luminescent efficiency and other color fluorescent materials. Another object of the present invention is to provide a method of fabricating a full color organic electroluminescent display device using a phosphorescent material to achieve at least one color lui nescent efficiency and other color fluorescence Fluorescent material0

1306724 V. INSTRUCTION DESCRIPTION (6) A further object of the present invention is to provide a full color organic electroluminescence display device having a large area and low power consumption. Another object of the invention is to provide a method of manufacturing a full color organic electroluminescence display device which has a large area and low power consumption. Other features and advantages of the present invention will be described later, and some will be disclosed in the description, and some will be learned by the embodiments of the present invention; the objects and other advantages of the present invention will be explained by the text department. The scope of the patent application and the attached drawings indicate the structure. To achieve these and other advantages consistent with the objectives of the present invention, as broadly described in the examples and other sections, the organic electroluminescent display device includes: a substrate having a plurality of red, green, blue a sub-pixel eigen region (sub-pixei regi〇n) located in the driving device of the substrate, the first electrode, the first electrode is connected to the driving device, and the hole injected from the first electrode is a second electrode above an electrode 'electrons injected from the second electrode, a luminescent layer of the luminescent material layer Between the first electrode and the second electrode, at a plurality of times Sub-piXel regi- ing 'The luminescent material layer having at least one sub-pixel region includes a phosphorescent material» On the other hand, the organic electroluminescent display device comprises: a substrate, the first electrode a hole in the first direction from the first electrode, a second electrode disposed above the first electrode, and a position along the second direction On 'the second line direction perpendicular to the first direction, electrons injected from the second electrode, a plurality of red light, green light, blue

Page 10 1306724 5 'Inventive Description (7) A sub-pixel region of color illumination, the sub-pixel region is located at the intersection of the first electrode and the second electrode, and a light emitting material layer The luminescent material layer is interposed between the first electrode and the second electrode, and the luminescent material layer having at least one sub-pixel region in the plurality of sub-pixel regions includes a phosphorescent material. In another aspect, a method of fabricating the organic electroluminescent display device includes the steps of: forming a plurality of red light-emitting, green-emitting 'blue-light sub-pixel regions on the substrate, forming a driving device. The step of forming a first electrode step-electrode is connected to the driving device, and the step of forming the second electrode over the first electrode from the first electrode is performed to form a layer of luminescent material. The luminescent material layer is interposed between the first electrode and the second electrode, and the luminescent material layer having a sub-pixel region includes a phosphorescent material in a plurality of sub-pixel regions (sub_pixel regi〇n/, In one aspect, a method of fabricating the organic electroluminescent display device includes the steps of: forming a first electrode, wherein the plate is located at a position along a first direction, and the electrode is located at the base to form the second electrode at the first The step of electromagnet on an electrode, which is straight to the first direction, "匕 the second direction is a red light, green light, blue == sudden, shape a step of forming a complex region, the sub-pixel region /_XH^ (sub_Plxel is extremely cross-over, and a step of forming P luminescent materials on the first pole and the second electrical eutectic layer, the hair - 1306724 The description (8) is between the first electrode and the second electrode, and the luminescent material layer of at least one sub-pixel region comprises a phosphorescent material. The general description before and the detailed description herein are as follows. The invention is explained in the following, and further explanation of the invention is provided. The invention will be described in detail with reference to the embodiments, which will be accompanied by the accompanying drawings and, where possible, the same or similar components (parts) ) 'The part will use the same number for all schemas.

The fourth figure illustrates a cross section of an organic electroluminescence display device (ELD) in accordance with the present invention. In the fourth figure, a driving device "τ" can be formed on a substrate 100, the substrate includes a pixel area (not shown), and the pixel area can include: a plurality of sub-pixel regions, The pixel area RP emits red light (R), and the sub-pixel area Gp emits green light (G) 'The sub-pixel area Bp emits blue light (B). The driving device" T11 drives the first electrode 112 in response to a signal from a switching device (not shown) adjacent to a plurality of sub-pixel regions Rp 'Gp, and Bp. A thin film transistor (TFT) includes a gate electrode 1〇2, one

Active layer 108' and source and electrodeless electrodes 1〇4, 1〇6, which can be used as a driving device "τ" with switching device (not shown) ^ a storage capacitor β (storage capacitor) The figure is connected to the driving device "τ", and the switching device can be formed adjacent to a plurality of sub-pixel regions Rp, Gp, and Bp. The first electrode 112 may be formed in the mother primary pixel region (sub_pixei

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5. The invention (9) region, and the second electrode 124 may be formed above the first electrode 112. The organic layer 120 of the plurality of layers may be interposed between the second electrode 124 and the first electrode 112 may include A layer of transparent conductive material, the material has a high work function, such as: indium-tin-oxide (ΙΤ0), or indium-zinc oxide (indiUm-Zinc-oxide ΙΖ0), the first The two electrodes 124 may include a layer of a metal material having a low work function (w〇rk functi〇n), for example

Such as: aluminum (A1), calcium (Ca) or magnesium (Mg), on the other hand 'the second electrode i24 may comprise a two-layer structure, for example, the structure includes lithium fluoride / aluminum (lithum Fluorine / aiuminum, LiF / A1) The first electrode ιΐ2 can be used as an anode rod through which the hole can be injected into the organic layer 120, wherein the first electrode 112 can be electrically connected to the gate electrode 106, and the second The electrode 124 can be used as a cathode rod through which electrons can be injected into the organic layer (〇rganic, wherein the second electrode 1 24 can be electrically connected to a common electrode (c〇nim〇n electrode^) Not shown), the common electrode is located above the substrate 1 ;; a switching device (not shown) is electrically connected to a gate line (not shown) and a data line (not shown). 120 may include a hole injection layer (HIL) 120a, a hole transmission layer (h〇u transp〇rting layer HTL) 12 0b emission material layer (EML) 120c , with an electron transport layer (electr〇n transporting layer, ETL) 120e, electricity Injection layer (HIL) 120a may be used as a buffer layer is interposed to reduce the hole injection layer (1111 12〇 ^ & and

Page 13 1306724 V. INSTRUCTION DESCRIPTION (10) An energy barrier between the first electrodes 112 facilitates smooth injection of holes from the first electrode 11 2 into the hole transport layer (HTL) 120b, the layer of the emissive material (EML) 120 c is located in a sub-pixel region RP that emits red light, which may be composed of a phosphorescent material; since the disc material has high luminous efficiency even at a low driving voltage, the red image can be highly purified. The red color is shown; the emissive material layer (eml) 12〇c is located in the sub-pixel region "with the heart, which can emit green light and blue light, which can be composed of a fluorescent material. Furthermore, the hole barrier layer (HBL) 120d is located on the EML120c, which is composed of a light-filling material; because the triplet luminescent material is different from the single-single luminescent material, the triplet luminescence material Compared with single-strand luminescence spectroscopy materials (Singlet luminescent materia 1), there is a lower electron-hole pair recombination probability (electron-hole pair re In order to improve the recombination probability of the electron-hole pair, the hole should be maintained in the emission material layer (EML) 12 0c for a period of time; therefore, HBU2〇d maintains the hole in (EML) 1 2 0c A period of growth; although the phosphorescent material is used only for red light in the present invention, the phosphorescent material can be used for green light and blue light. The fifth figure illustrates another organic electric according to the present invention. In the fifth diagram, the driving device "τ" can be formed on a certain board 200, the substrate 20 0 has a pixel area (not shown), and the image area can include a plurality of Sub-pixel area (sub_pixel regl〇n) Rp prime

1306724 V. Description of invention (11) --

Gp, and Bp, the sub-pixel region Rp emits red light (R), the sub-pixel region Gp emits green light (G), and the sub-pixel region Bp emits blue light (B). The driving device "T" drives the first electrode 212 in response to a signal received from a switching device (not shown) adjacent to a plurality of sub-pixel regions Rp, Gp, And a thin film transistor (TFT) including a gate electrode 2〇2, an active layer 208, and source and drain electrodes 2〇4, 2〇6, which can be used as a driver Device T and switching device (not shown). A storage capacitor (not shown) is connected to the driving device "Tm, and the switching device can be formed adjacent to a plurality of sub-pixel regions (Rp) a position of 'Gp, and Bp. The first electrode 212 may be formed in each sub-pixel region, and the second electrode 224 may be formed over the first electrode 212; and the plurality of organic layers 220 may be formed in the first The first electrode 212 may include a transparent conductive material having a high work function, for example, indium-t in-oxide (I TO ). , or indium zinc oxide (indium -zinc-oxide IZ0), for example: the second electrode may comprise a layer of a metallic material having a low work function (eg: (Al) '#5(Ca) or magnesium (Mg), on the other hand, the second electrode 224 may include a two-layer structure, for example, the structure includes lithium fluoride/aluminum (Uthum Fluorine/aluminum, UF/A1); the first electrode 212 may serve as an anode rod (anode) Through the anode rod, a hole can be injected into the organic layer 220, wherein the first electrode 212 can be electrically connected to the crucible

Page 15 1306724 V. DESCRIPTION OF THE INVENTION (12) Electrode electrode 206 'The second electrode 2 24 can be used as a cathode rod through which an electron can be injected into an organic layer 220, wherein The two electrodes 224 are electrically connected to a common electrode (not shown), and the common electrode is located above the substrate 200; the switching device (not shown) can be electrically connected to a gate line (not shown) Show) and a data line (not shown). The red or blue light organic layer 220 may include a hole injection layer (HIL) 220a, a hole transporting layer (HTL) 220b, and an emission material layer. EML) 220c, the emissive material layer 220c is a phosphorescent material, and a hole blocking layer (HBL) 220d, and an electron transporting layer ETL 120e; conversely, a green-emitting organic layer 220 having a phosphorescent material 'which cannot be used for the red or blue light of the present invention, and may not include a layer of HBL 2 2 0d; even a phosphorescent material is used for The invention uses red or blue light, but the phosphorescent material can only be used in other combinations of two colors. A hole injection layer (HIL) 220a and a hole transport layer (HTL) 220b may be separately formed for each of the sub-pixel regions Rp, Gp, and Bp to maximize the luminous efficiency of the emissive material layer 2 2 0 c. Chemical. For example, the phosphorescent material of the emissive material layer 220c is CBP (4, 49-N, N9-dicarbazole-biphenyl), BCP and Balq3 can

Page 16 1306724 V. Description of invention (13) Use as HBL220d. Furthermore, Ir(ppy)33, 7, 8, 12, 13, 17, 18-〇ctaethyl-21H, 23H-porphine platinum(II) can be used as a dopant ((i〇pant), respectively) In green and red, as shown in the sixth A, sixth B, and sixth c. Here, the same substance can be utilized as the electron transport layer (ETL) of each sub-pixel region Rp, Gp, and Figure 7 is a cross-sectional view of another exemplary light-emitting display device according to the present invention. In the seventh figure, a driving device "P" can be formed on a substrate 300 having a pixel area. A plurality of sub-pixel regions Rp may be included for red, Gp for green and Bp for blue. The driver "T" may drive a first electrode 312 (3 firs1: electr〇de 312), Responding to a received signal from a switching device (not shown), wherein the switching device is adjacent to a plurality of sub-pixel regions Rp, Gp, and Bp. A thin film transistor (TFT) includes a gate A gate electrode 302 (a gate electrode 3 0 2 ), an active layer 308, and a source and a drain The poles 304 and 306 can be utilized as a driving device "T" and a switching device (not shown). A storage capacitor (not shown) is connected to the driving device "T" and the switching device can also be formed And adjacent to the plurality of sub-pixel regions Rp, Gp, and Bp. The first electrode 312 may be formed at each sub-pixel region, and the second electrode 324 may be formed on the first electrode 312. The multi-layer organic layer 32 may be involved in the first An electrode 312 is interposed between the second electrode 324. The first electrode 312 may comprise a transparent conductive material having a high work function, the material having _ a high work function 'for example: indium tin oxide or oxygen

1306724 V. DESCRIPTION OF THE INVENTION (14) The compound 'and the second electrode 3 24 may comprise a layer of a metallic material having a low work function (w 0 rkfuncti 〇η ), for example: Shao (a 1 ), dance (Ca) Or magnesium (Mg), on the other hand, the second electrode 324 may comprise a two-layer structure, for example, the structure includes lithium fluoride/aluminum (lithoFlu〇rine/(anode) through which the hole can be injected into the organic Layer (〇rganic

The first electrode 312 is electrically connected to the drain electrode C 306. The second electrode 324 can serve as a cathode rod through which electrons can be injected into the organic layer 32 〇, wherein the two electrodes 324 can be electrically connected to a common electrode (c〇iflm Electn electade) (^ shows), the common electrode is located above the substrate 3〇〇; switching device (not shown J can be electrically connected to the - idle line (not shown) and a data line (not shown) The organic layer 32〇 for red, green and blue may comprise a hole injection layer (HIL) 320a, a hole transport layer (HTL) 32〇b, an emissive material layer (EML) 32 0c, a layer Hole barrier layer (HBL) 32 〇d sub-transport layer (ETL) 320e. The emission material ^q9nr> s s vis dan 1 due to the slave π 玎 layer 320c can be formed separately in each sub-pixel region Rp, Gp, and P, for example, traversing the deposited and patterned phosphor material. Although the fourth, fifth and seventh figures show the active electroluminescent display device using a driving device to cut the secret, _ passive electroluminescent display device Switching device, the invention can be applied to the eighth figure according to another typical embodiment of the present invention Electroluminescence display device according to an eighth cross-sectional drawing '- first electrode 412 may have a pixel region

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The substrate 4 0 0 (not shown) may be formed along the first direction to include a plurality of sub-pixel regions Rp for red, and the image for the second electrode m. The _th surface and the second direction perpendicular to the first direction traverse the first electrode m; A plurality of sub-pixel regions Rp 'Gp and B may be at the intersection of "412 and the second electrode 424. The right second electrode of the plurality of layers may be between the first electrode 412 and the second electrode 424. The first electrode 412 may be a transparent conductive material having a high work function, the material having a work function such as: indium tin oxide or indium zinc oxide ' and the second electrode 424 may include a metal material The material has a low work function, such as aluminum (Αι), calcium "a" or magnesium (Mg), and on the other hand, the second electrode 424 may comprise a two-layer structure, for example, The structure includes lithium fluoride/aluminum (lithumFluc) Hne/s. aluminum 'UF/A1). The first electrode 412 can be used as an anode rod. (anode), through which the hole can be injected - 42〇 The first electrode 412 can be electrically connected to a = = 路 (not shown). The second electrode 424 can be used as a cathode rod through which electrons can be injected into the organic layer. Rganic Uyer) 42〇, wherein the second electrode 424 is electrically connected to an external line (not shown). The organic layer 42〇 for red, green and blue may include a hole injection layer (HIL) 420a, one a hole transport layer (HTL) 42〇b, an emissive material layer (EML) 420c, a layer hole barrier layer (HBL) 42〇d and an electron transport layer (ETL) 420e. The hole injection layer 42〇a can operate as a buffer layer 'to lower the hole injection layer 4 2 〇a and the first electrode Between 41 2

Page 19 1306724 V. INSTRUCTIONS (16) -- The amount of obstacles ' facilitates smooth injection of holes from the first electrode 412 into the hole transport layer (mwGb. The emissive material layer (EML) 42Gc is located at a time that emits red light The pixel area rp, which may be composed of a phosphorescent material; since the phosphorescent material has high luminous efficiency even at a low driving voltage, the red image can be displayed in high-purity red. The emissive material layer (EML) The 420c is located in the sub-pixel regions Gp and Bp which emit green light and blue light, and may be composed of a fluorescent material. Further, the hole blocking layer 42〇d is located in a sub-pixel region which emits red light. Rp's EML4 20c, which consists of a phosphorescent material. Because the triplet luminescent material is different from the single singer luminescent material, the triplet luminescence spectrum The material has a lower electron-hole pair recombination compared to the single-single luminescent material (electron-h〇le pair recombinatic) )n probability) 'To enhance the recombination probability of the electron-hole pair, the hole deer is maintained in the emissive material layer (EML) 42 0c for a period of time. Therefore, the HBL420d maintains the hole at (EML) 42〇c in a section The time of growth. Although the phosphorescent material is used in the present invention only for red light 'but the phosphorescent material can be used for green light, blue light. The ninth figure is according to another typical light-emitting display device of the present invention. In the ninth diagram, a first electrode 512 may be formed along a first direction on a substrate 5 having a pixel region (not shown). This pixel region may include a plurality of sub-pixel regions Rp for Red, Gp for green

Page 20 1306724 V. Description of invention (17) and Bp for blue. A second electrode 524 may be formed across the first electrode 512 in a second direction perpendicular to the first direction on the first electrode 512. An organic layer 520 comprising a plurality of organic layers may be interposed between the first electrode 512 and the second electrode 524. The first electrode 512 may comprise a transparent conductive material having a high work function. The material has a high work function, such as oxidized tin or indium zinc oxide, and the second electrode 5 24 may comprise a layer of metal. a material having a low work function, such as aluminum (A1), calcium (ca) or magnesium (Mg). On the other hand, the second electrode 524 may comprise a two-layer structure, for example, The structure includes lithium Fluorine/aluminum (1^?/^1). The first electrode 512 can serve as an anode rod (3110 (16) through which a hole can be injected into the organic layer 52 〇, wherein the first electrode 51 2 can be electrically connected to an external line (Fig. The second electrode 524 can be used as a cathode rod through which electrons can be injected into the organic layer 520, wherein the second electrode 524 can be electrically connected to the external line (not shown). The organic layer 52' for red, green, and blue may include a hole injection layer (HIL) 520a, a hole transport layer (HTL) 520b, an emissive material layer (EML) 520c, and a layer of holes. The layer (HBL) 520d is opposite to an electron transport layer (ETL) 520e, and the emissive material layer (EML) 520c having a % light material for the green organic layer 52 可以 may not include the hole barrier layer 520d ° hole injection layer The 5 2 0a and hole transport layer 520b may be separately formed for each of the sub-pixel regions rp, Gp and βρ to maximize the luminous efficiency of the emissive material layer 520c. Again, the same substance may be utilized every time. image

1306724 V. DESCRIPTION OF THE INVENTION (18) The electron transport layer 52〇e of the prime regions Rp, Gp and Bp. Although the phosphor material can be utilized as red light and blue light in the invention, the light material can be used in two colors of other groups. The tenth embodiment is based on another exemplary light-emitting display device of the present invention. In the tenth figure, a first electrode 612 can be formed along the first side (four) on the substrate 600 having the pixel area, the area 哉 (not shown). This pixel area may contain a plurality of sub-pixel areas R p which are used for red, G p which is used for Bp f for blue. A second electrode m may be formed on the first electrode 6 side/port in a vertical first direction "the second turn is crossed across the first electrode 612. An organic layer 62G' includes an organic layer of a plurality of layers interposed between the first electrode 61 2 and the second electrode 624. The electrode 612 may comprise a transparent work material of a south work function having a high work function, such as indium tin oxide or indium zinc oxide, and the second electrode 624 may comprise a layer of metal a material having a low work function, such as aluminum (A1), calcium (Ca) or magnesium (Mg), and on the other hand, the second electrode 624 may comprise a two-layer structure, such as The structure includes lithium fluoride/aluminum (lithumFlu〇rine/alumin(10), /A1). The electrode 612 can be used as an anode rod (anocje) through which the hole can be injected into the organic layer (〇rganic layer) 62〇, one of which The electrode 612 can be electrically connected to an external circuit (not shown) / the second electrode 624 can be used as a cathode rod through which electrons can be injected into the organic layer 62 〇, wherein The second electrode 624 can be electrically connected to an external line (not shown). For the red 'green and blue organic layer 62 〇 can contain an electric

Page 22 1306724 V. INSTRUCTIONS (19) Hole injection layer (HIL) 620a, a hole transport layer (HTL) 620b, an emissive material layer (EML) 620c, a layer of hole barrier layer (HBL) 620d and an electron Transport Layer (ETL) 620e. The emissive material layer 620c may be formed separately in each of the sub-pixel regions Rp, Gp, and Bp', for example, through the deposited and patterned disc material. The retouching and modification of the organic electroluminescent display device of the present invention is not intended to be exhaustive or modified by those skilled in the art. Accordingly, the present invention covers the scope of the claims and their equivalents and modifications.

</ RTI> </ RTI> </ RTI> </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> <RTIgt; Figure: The first circle is a cross section of an organic electroluminescent display device (ELD) according to the prior art. Figure 2 is a cross section of a full color organic electroluminescent display device (ELD) according to the prior art. Figure 3 is a diagram showing the energy state of a luminescent material according to the prior art. Fig. 4 is a cross section of an organic electroluminescent display (ELD) according to the present invention. Figure 5 illustrates a cross section of another organic electroluminescent display (ELD) in accordance with the present invention. Fig. 6A, Fig. 6B and Fig. 6C show CBP' Ir(ppy)3 and Pt〇Ep chemical compositions of the dopant according to the present invention. Figure 7 is a cross-sectional view of another exemplary light-emitting display device according to another embodiment of the present invention. Figure 9 is a cross-sectional view of another exemplary light-emitting display device according to the present invention. Cross-sectional view of an electroluminescent display device according to another exemplary embodiment of the present invention

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1306724 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 10 shows an organic electroluminescent display device 12 32 1 1 2 2 1 2 3 1 2 41 2 512 612 First electrode 1 4 36 1 24 224 324 424 524 624 Second electrode 1 6 34 1 20 220 3 20 420 52 0 620 Organic layer 16a 34b 120b 220b 320b 420b 520b 620b Hole transport layer (HTL) 16b 34c 120c 220c 320c 420c 52 0c 620c Emissive material layer (EML) 16c 34d 120e 420e 520e 620e Electron transport layer ( ETL) 3 0 1 0 0 2 0 0 3 0 0 4 0 0 5 0 0 6 0 0 Substrate 34a hole inducing layer (HIL) 20 single exciton 22 triple exciton 24 ground state 102 202 302 gate electrode 104 204 304 source electrode 106 206 306 电极 electrode 120a 220a 3 20a 420a 5 2 0a 620a hole injection layer (HIL) 120d 2 2 0d 320d 420d 520d 620d hole barrier layer (HBL) 20 8 30 8 active layer

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Claims (1)

1306724 ψζ- / / VI, the scope of application for patents 1. An organic electricity ί a substrate, the sub-pixel area; one on the substrate at the first electron; - between the first number of sub-images Luminescent material layer of phosphorescent material 2. The first electrode package 3 as claimed in the patent. The second electrode package 4 as claimed in the patent application. The second electrode package as claimed in the patent 5. If the patent application is located in the first hole transfer layer To the electron transport layer.丨·If you apply for a patent _ one is located in the hole barrier. 'An organic electroluminescence having an electrode domain on the upper electrode of the drive electrode, the material comprising a range containing the range of the range containing the range of the first - the first and the second The display device comprises: a plurality of red hair first, a green light emitting device, a moving device, a second electrode from the first electrode injection side, and a light emitting material from the first electrode and the second electrode has one less subpixel region Other fluorescent materials in a plurality of sub-pixel regions are emitted. The device of claim 1, wherein one of the devices is indium tin oxide or indium oxide, wherein the device emits a hole in which blue light is emitted; and the second electrode injection layer includes a pixel region in the layer of the light-receiving material. A device according to the item of aluminum or calcium or magnesium, wherein the two-layer structure includes the device described in the item of lithium fluoride/inscription 1, and further includes a hole between the layer of the luminescent material and the second The apparatus of the fifth aspect between the electrode and the luminescent material injection layer and the electric material layer, further comprising an electroluminescent display device of the luminescent material layer of the substance and the electron transport layer, including Page 25, page 1306724 6. Patent application: a substrate; a hole injected along the electrode on the substrate; a first electrode arranged in the first direction from the first one along the second direction perpendicular to the first direction Έή - - Φ + ς and a plurality of red illuminates above the first electrode, green illuminating, J is electrically, (Suh η · , . , ^ blue illuminating sub-pixel region ksub-plxei region), this time a pixel region is located between the first electrode and the luminescent material layer between the first electrode and the first electrode and the M electrode, in the plurality of people Pixel area, at least one continued + German 厶 魂 魂 魂 魂 - - - - - - - - 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人 人The luminescent material layer comprises a fluorescent material. The device of claim 7, wherein the first electrode comprises one of indium tin oxide or indium zinc oxide. 9. The device of claim 7, wherein the second electrode comprises one of aluminum or calcium or magnesium. 10. The device of claim 7, wherein the second electrode comprises a double layer structure. The structure comprises a bell fluoride. 11_ The device of claim 7, further comprising a hole injection layer and a hole transport layer between the first electrode and the luminescent material layer, and a second electrode and the illuminating layer An electron transport layer between layers of material. 12. The device of claim 11, further comprising a layer of a luminescent material comprising a scaly light material and the electron transport layer Page 26 1306724 VI. Patent Application Hole barrier. 13. A method of fabricating an organic electroluminescent display device, the scoop forming a plurality of red luminescence on a substrate, 'comprising the following steps: a sub-pixel region of light; v illuminating a blue ray forming a surface on the substrate a driving device; forming a first electrode connected to the driving device, and a hole injected into the complex pole; "--from the first electricity to form an electron injected at the electrode of the first tens of thousands; a first electrode and the second electrode: in the plurality of sub-pixel regions, at least one of the material layers '2 material layer comprises a lining material 'the radiance of the plurality of sub-images The material layer comprises a fluorescent material. The other method is as described in claim 13, wherein the T-second electrode comprises one of the indium tin oxide or indium zinc oxide. The method of claim 13, wherein the second electrode comprises one of the inscriptions or the mother or the town. 16. The method of claim 3, wherein the gamma second electrode comprises a Double layer structure, the knot The method includes the method described in claim 13, further comprising the steps of: 7 forming a / / hole transport layer between the first electrode and the luminescent material layer; The hole is implanted to form an electrical layer between the second electrode and the luminescent material layer. 1306724 VI. Scope of Application Patent 18. The method of claim 17, further comprising the steps of: forming a hole barrier layer in the layer of luminescent material comprising the phosphorescent material and the electron transport layer. 19. A method of fabricating an organic electroluminescent display device comprising the steps of: forming a first electrode disposed along a first direction on a substrate, wherein a hole is injected from the first electrode; forming an edge a second electrode that is perpendicular to the second direction of the first direction and that is not disposed above the first electrode, wherein one of the electrons injected from the second electrode forms a plurality of red, green, and blue light a sub-pixel region, wherein the sub-pixel region is located at the intersection of the second electrode and the second electrode; forming a first sub-pixel and an electrode between the first electro-optical and the town a layer of luminescent material 'the material layer of which comprises a phosphor material 2, a luminescent material layer of the illuminant region of the sub-pixel region, and a second sub-image of the plurality of sub-pixel regions.丄 Two kinds of fluorescent materials. The first electrode comprises the method described in the above item, wherein 21. the indium tin oxide or indium oxide as in the patent application range l9lg. The second electrode comprises the method of any of the two, wherein 22. as claimed in the scope of the patent, the ninth, the eternal or the town. The second electrode comprises a method of the two described above, wherein the structure comprises a structure of the 19th structure of the patent, the structure comprising lithium fluoride/aluminum. Forming a method as described in the first electrode, further comprising the steps of: forming a hole injection layer 4 between the luminescent material layer and the luminescent material layer; and forming a hole injection layer 4 between the luminescent material layer It Page 28 1306724 Page 29