WO2014121561A1 - 像素结构及其制作方法 - Google Patents
像素结构及其制作方法 Download PDFInfo
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- WO2014121561A1 WO2014121561A1 PCT/CN2013/074795 CN2013074795W WO2014121561A1 WO 2014121561 A1 WO2014121561 A1 WO 2014121561A1 CN 2013074795 W CN2013074795 W CN 2013074795W WO 2014121561 A1 WO2014121561 A1 WO 2014121561A1
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- layer
- organic light
- light
- organic
- pixel structure
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 239000000758 substrate Substances 0.000 claims abstract description 69
- 239000010410 layer Substances 0.000 claims description 512
- 239000010408 film Substances 0.000 claims description 64
- 239000010409 thin film Substances 0.000 claims description 63
- 238000002161 passivation Methods 0.000 claims description 55
- 238000000034 method Methods 0.000 claims description 19
- 239000011241 protective layer Substances 0.000 claims description 18
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 238000002834 transmittance Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 4
- 229920000178 Acrylic resin Polymers 0.000 claims description 4
- 238000000206 photolithography Methods 0.000 claims description 4
- 239000011368 organic material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 description 15
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- 230000000694 effects Effects 0.000 description 4
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 230000004913 activation Effects 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910052732 germanium Inorganic materials 0.000 description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 3
- 229910003437 indium oxide Inorganic materials 0.000 description 3
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 229910001257 Nb alloy Inorganic materials 0.000 description 2
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- 238000004220 aggregation Methods 0.000 description 2
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- 229910052739 hydrogen Inorganic materials 0.000 description 2
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- 229910052760 oxygen Inorganic materials 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 229920005591 polysilicon Polymers 0.000 description 2
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- 229910017107 AlOx Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
- -1 HfOx Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- QNTVPKHKFIYODU-UHFFFAOYSA-N aluminum niobium Chemical compound [Al].[Nb] QNTVPKHKFIYODU-UHFFFAOYSA-N 0.000 description 1
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
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- DTSBBUTWIOVIBV-UHFFFAOYSA-N molybdenum niobium Chemical compound [Nb].[Mo] DTSBBUTWIOVIBV-UHFFFAOYSA-N 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/123—Connection of the pixel electrodes to the thin film transistors [TFT]
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/124—Insulating layers formed between TFT elements and OLED elements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/80—Constructional details
- H10K59/875—Arrangements for extracting light from the devices
- H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/1201—Manufacture or treatment
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
Definitions
- Embodiments of the present invention relate to a pixel structure and a method of fabricating the same. Background technique
- the organic light emitting display is a novel display device. Compared with the liquid crystal display, the organic light emitting display has the advantages of self-illumination, fast response speed and wide viewing angle, and can be flexibly displayed, transparently displayed, and displayed in 3D, thereby achieving rapid development. With popularity. There are many ways to achieve color display in organic light-emitting displays, such as RGB (red, green and blue) full-color OLED (organic light-emitting diode), WOLED-CF (white OLED and red, green, blue, white and four color filters).
- RGB red, green and blue
- OLED-CF white OLED and red, green, blue, white and four color filters
- WOLED-COA white OLED and color filter array
- each pixel structure in the plurality of pixel structures included in the OLED display includes an OLED layer and a color thin film layer, wherein the OLED layer is used to generate White light, a color film layer is used to convert white light produced by the OLED layer into colored light. Since the white light emitted from the OLED layer is directed in various directions, the intensity of the colored light formed by the white light emitted from the OLED layer after passing through the color thin film layer is relatively small, resulting in low display brightness of the organic light emitting display.
- a pixel structure and a method for fabricating the same according to embodiments of the present invention can improve display brightness of an organic light emitting display.
- a pixel structure provided by the embodiment of the present invention includes: a substrate; an organic light emitting layer disposed on the substrate; and an organic light collecting layer disposed on a light emitting side of the organic light emitting layer, wherein the organic light emitting layer is emitted Light is incident thereon and used to collect light generated by the organic light-emitting layer
- a method for fabricating a pixel structure according to an embodiment of the invention includes: preparing an organic concentrating layer on a substrate, and preparing an organic luminescent layer on the organic concentrating layer; or preparing an organic luminescent layer on the substrate a layer, and an organic concentrating layer is prepared on the organic light-emitting layer.
- the pixel structure provided by the embodiment of the present invention includes a substrate, an organic light emitting layer disposed on the substrate, and an organic light collecting layer for collecting light generated by the organic light emitting layer, wherein the organic light collecting layer can light the light from the organic light emitting layer.
- the aggregation causes the intensity of light passing through the organic concentrating layer to be enhanced, thereby increasing the display brightness of the organic light emitting display.
- FIG. 1 is a cross-sectional structural view of a first pixel structure in accordance with an embodiment of the present invention
- FIG. 2 is a cross-sectional structural view of a second pixel structure in accordance with an embodiment of the present invention
- 3A to 3D are projection views of an organic light collecting layer on a substrate according to an embodiment of the present invention. detailed description
- the pixel structure provided by the embodiment of the invention includes a substrate and an organic light emitting layer disposed on the substrate, and further includes an organic light collecting layer for collecting light generated by the organic light emitting layer, wherein the organic light collecting layer can light the light from the organic light emitting layer
- the aggregation causes the intensity of light emitted from the organic concentrating layer to be enhanced, thereby improving the display brightness of the organic light emitting display.
- one pixel structure in the embodiment of the present invention is one pixel unit.
- the embodiments of the present invention are further described in detail below with reference to the accompanying drawings.
- the pixel structure provided by the embodiment of the invention includes a substrate and an organic light emitting layer disposed on the substrate, and further includes an organic light collecting layer for collecting light generated by the organic light emitting layer.
- the material of the organic concentrating layer is a transparent organic material, and the organic material having a transmittance value greater than a certain threshold.
- the specific threshold can be set as needed, for example, set to 95%.
- the organic concentrating layer is a transparent organic film, for example, the organic concentrating layer is made of acrylic resin
- the embodiment of the present invention provides two different types of pixel structures, which are a first pixel structure and a second pixel structure, respectively, according to the positional relationship between the organic light-concentrating layer and the organic light-emitting layer, which will be separately described below.
- the organic concentrating layer is disposed between the color film layer and the organic luminescent layer, that is, on the light incident side of the color film layer.
- the first pixel structure provided by the embodiment of the present invention includes a substrate 100, a thin film transistor 101 disposed on the substrate 100, and a first passivation layer 102 disposed on the substrate 100 and partially covering the thin film transistor 101.
- the transparent electrode layer 106 electrically connected to the thin film transistor 101, the pixel electrode layer 107 disposed on the transparent electrode layer 106, and the OLED layer (ie, the organic light emitting layer) 108 disposed on the pixel electrode layer 107 are disposed on the organic A cathode metal layer 109 on the luminescent layer 108.
- the thin film transistor 101 includes a gate electrode layer 1011 disposed on the substrate 100, a gate insulating layer 1012 disposed on the substrate 100 and covering the gate electrode layer 1011, and a semiconductor active layer 1013 disposed on the gate insulating layer 1012.
- the etch stop layer 1014 on the semiconductor active layer 1013 is disposed on the drain electrode 1015a and the source electrode 1015b on both sides of the semiconductor active layer 1013, respectively.
- the transparent electrode layer 106 is electrically connected to the thin film transistor 101, and specifically includes: the transparent electrode layer 106 is electrically connected to the drain electrode 1015a of the thin film transistor 101 through the first contact hole 110, wherein the first contact hole
- the first passivation layer 105, the planarization layer 104, the color thin film layer 103, and the first passivation layer 102 are penetrated and connected to the drain electrode 1015a of the thin film transistor 101.
- the first pixel structure provided by the embodiment of the present invention further includes an organic concentrating layer 111 disposed between the color film layer 103 and the organic luminescent layer 108 for collecting light generated by the organic luminescent layer 108, and The collected light is transmitted to the color film layer 103.
- the pixel electrode layer 107, the transparent electrode layer 106, the second passivation layer 105, and the planarization layer 104 have light transmissivity, and thus the light generated by the organic light-emitting layer 108
- the organic light-concentrating layer 111 disposed between the organic light-emitting layer 108 and the color thin film layer 103 is collected, the light from the organic light-emitting layer 108 is collected.
- the organic light-concentrating layer 111 condenses the scattered light emitted by the organic light-emitting layer 108 and emits light in various directions, the intensity and density of the formed colored light are relatively large, thereby causing the organic light-emitting display.
- the display brightness is higher.
- the organic light collecting layer 111 includes at least one first lens unit 112.
- the organic light collecting layer 111 includes 1 to 10 first lens units 112.
- the organic concentrating layer 111 includes a first pixel unit 112.
- the projection of the first pixel structure on the substrate 100 is as shown in FIG. 3A.
- the organic concentrating layer 111 includes the first pixel structure of the four first lens units 112.
- the projection on the substrate 100 is as shown in FIG. 3B, wherein the a area in FIGS. 3A and 3B is the projection area of the thin film transistor 101 on the substrate 100, and the b area in FIGS. 3A and 3B is included in the organic light collecting layer 111.
- the projection area of the first lens unit 112 on the substrate 100 is included in the organic light collecting layer 111.
- the first lens unit 112 is a convex lens.
- the first lens unit 112 is a convex lens, and since the organic light-concentrating layer 111 is convex toward the light direction, the organic light-concentrating layer 111 can emit organic light.
- the dispersed light emitted by the layer 108 in various directions is collected, and the light is refracted at the interface of the organic light collecting layer 111 and the layer adjacent to the light incident side of the organic light collecting layer 111.
- the shape of the cross section of the first lens unit 112 perpendicular to the planar direction of the substrate 100 is a circular arc shape, that is, the shape of the interface between the first lens unit 112 and the adjacent layer on the light incident side thereof is a circular arc shape.
- the shape of the cross section of the first lens unit 112 parallel to the planar direction of the substrate 100 may be set as needed, for example, circular, elliptical or rectangular.
- the projection of the first pixel structure including the first lens unit 112 on the substrate 100 is as shown in FIGS. 3A and 3B;
- the projection of the first pixel structure including the first lens unit 112 on the substrate 100 is as shown in FIGS. 3C and 3D.
- the long radius of the cross section of the first lens unit 112 parallel to the planar direction of the substrate 100 is parallel or perpendicular to the pixel
- the long side of the structure in the case where the cross section of the first lens unit 112 parallel to the planar direction of the substrate 100 is a rectangle, the first lens unit 112 is parallel to the plane of the substrate 100
- the long side of the cross section of the direction is parallel or perpendicular to the long side of the pixel structure, wherein the long side of the pixel structure refers to the pixel structure or the longest side of the pixel unit, as shown in FIG. 3A, and the side length AB in FIG. 3A is The long side of the pixel structure.
- the first lens unit 112 parallel to the plane direction of the substrate 100 when the cross section of the first lens unit 112 parallel to the plane direction of the substrate 100 is circular, the long radius of the circle is parallel to the long side of the pixel structure; as shown in FIG. 3C, the first lens When the cross section of the unit 112 parallel to the planar direction of the substrate 100 is a rectangle, the long side of the rectangle is parallel to the long side of the pixel structure.
- the organic light collecting layer 111 including the first lens unit 112 has a better light collecting effect.
- the thickness of the organic concentrating layer 111 can be set as needed, for example,
- the organic light-concentrating layer 111 has a thickness of 1 ⁇ - 2 ⁇ .
- the material of the layer on the light incident side of the organic light collecting layer 111 and adjacent to the organic light collecting layer 111 is different from the material of the organic light collecting layer 111.
- the light refractive index of the layer located on the light incident side of the organic light collecting layer 111 and adjacent to the organic light collecting layer 111 is smaller than the light refractive index of the organic light collecting layer 111.
- the light refractive index of the layer located on the light incident side of the organic light collecting layer 111 and adjacent to the organic light collecting layer 111 is smaller than the light refractive index of the organic light collecting layer 111, and then in the organic light collecting layer 111.
- the organic concentrating layer 111 may be disposed at a plurality of locations.
- the organic concentrating layer 111 may be disposed between the color thin film layer 103 and the planarization layer 104, and the organic concentrating layer 111 may be disposed on the planarization layer 104.
- the organic light-concentrating layer 111 may be disposed between the second passivation layer 105 and the transparent electrode layer 106, as long as the organic light-concentrating layer 111 can collect light emitted from the organic light-emitting layer 108. The collected light may be directed to the color film layer 103.
- the organic concentrating layer 111 in the embodiment of the present invention may be one or plural, and the positions of different organic concentrating layers 111 are not limited.
- the first pixel structure further includes a free transfer layer 113 for directing light from the organic light-emitting layer 108 to various directions, a light-transmissive side of the color film layer 103, and a free transfer layer 113 on the substrate 100.
- the projection area and the projection area of the organic light collecting layer 111 on the substrate 100 do not overlap.
- the area c in FIGS. 3A, 3B, 3C, and 3D is a projection area of the free transport layer 113 on the substrate 100.
- the organic light-emitting layer 111 collects the light emitted from the organic light-emitting layer 108 to enhance the display brightness of the display device
- the organic concentrating layer 111 is specifically described below with the organic concentrating layer 111 disposed between the color film layer 103 and the planarization layer 104 and the organic concentrating layer 111 having one first lens unit 112 as an example.
- the implementation of the other embodiments is similar to the implementation of the embodiment of the present invention, and details are not described herein again.
- the organic concentrating layer 111 is disposed between the color film layer 103 and the planarization layer 104 , and includes a first lens unit 112 .
- the interface of the first lens unit 112 on the light incident side is perpendicular to the substrate 100 .
- the cross section in the planar direction is a circular arc shape; in addition, the material of the planarization layer 104 is different from the material of the organic concentrating layer 111, and the refractive index of the planarization layer 104 is smaller than the refractive index of the organic concentrating layer 111, but is flattened.
- Both the layer 104 and the organic concentrating layer 111 are transparent organic films.
- the transparent electrode layer 106 electrically connected to the drain electrode 1015a of the thin film transistor 101 provides an anode electrical signal for the organic light-emitting layer 108
- the cathode metal layer 109 having a non-transmissive property provides a cathode electrical signal for the organic light-emitting layer 108.
- the white light generated by the organic light-emitting layer 108 passes through the light-transmitting pixel electrode layer 107, the transparent electrode layer 106, the second passivation layer 105, and the planarization layer 104, and is incident on the organic light-concentrating layer 111 and the free-transport layer 113.
- the organic light-concentrating layer 111 collects the white light generated by the received organic light-emitting layer 108, and the free-transport layer 113 directs the white light generated by the received organic light-emitting layer 108 in various directions.
- the white light emitted from the organic concentrating layer 111 and the free transport layer 113 passes through the color film layer 103, and is filtered to become colored light.
- the gate electrode layer 1011 is made of Mo (molybdenum), MoNb (molybdenum-niobium alloy), A1 (aluminum),
- the gate electrode layer 1011 has a thickness of 100 nm to 3000 nm.
- the gate insulating layer 1012 is composed of SiO x (oxide of silicon), SiN x (nitride of silicon), HfO x (oxide of germanium), SiON (oxygen oxide of silicon), and A10 x ( In aluminum oxide) One or more formed single or multi-layer composite films.
- the H (hydrogen) content of the gate insulating layer 1012 is below a certain threshold.
- the specific threshold can be set as needed, for example, set to 10%.
- the H content of the gate insulating layer of the thin film transistor in the pixel structure can also be a value known in the art.
- the gate insulating layer 1012 has a thickness of 1500 to 300 ⁇ .
- the semiconductor active layer 1013 is made of a-Si (amorphous silicon), P-Si (polysilicon) or an oxide semiconductor.
- the oxide semiconductor is made of a film containing an element such as In (indium), Ga (gallium), Zn (express), 0 (oxygen), and Sn (tin), wherein the film must contain oxygen. Element and two or more other elements, such as IGZO (Indium Oxide), IZO (Indium Oxide), InSnO (Indium Tin Oxide), InGaSnO (InGaAs).
- the semiconductor active layer 1013 has a thickness of 10 nm to 100 nm.
- the etch barrier layer 1014 is a single layer or a multilayer composite film formed of one or more of SiOx, SiNx, HfOx, and AlOx.
- the H (hydrogen) content of the etch stop layer 1014 is below a certain threshold.
- the specific threshold can be set as needed, for example, set to 8%.
- the H content of the etch stop layer of the thin film transistor in the pixel structure of the embodiment of the present invention may also be a commonly used value known in the art.
- the etch stop layer 1014 has a thickness of 800A to 2000A.
- the drain electrode 1015a and the source electrode 1015b are made of Mo, MoNb, Al, AlNd,
- the first passivation layer 102 is a single layer or a multilayer composite film formed of one or more of SiO x , SiN x , HfO x , and A10 x .
- the first passivation layer 102 is a two-layer composite film composed of SiO x and SiN x .
- the thickness of SiO x is 2000A to 3000A, and the thickness of SiN x is 20 ⁇ 100 ⁇ .
- the H content of the first passivation layer 102 is below a certain threshold.
- the specific threshold can be set as needed, for example, set to 10%.
- H content of the passivation layer of the pixel structure of the embodiment of the present invention may also be a commonly used value well known in the art.
- the first passivation layer 102 has better compactness and surface characteristics.
- the thickness of the planarization layer 104 is 0.2 ⁇ m to 5 ⁇ m, and alternatively, the thickness of the planarization layer 104 is 1 ⁇ m to 2 ⁇ m.
- the second passivation layer 105 is similar to the first passivation layer 102 except that the thin film transistor 101 protected by the first passivation layer 102 has better performance, and the germanium content of the first passivation layer 102 is required.
- the germanium content lower than the second passivation layer 105, and the denseness of the first passivation layer 102 are higher than the denseness of the second passivation layer 105.
- the organic concentrating layer is disposed on the light emitting side of the organic luminescent layer and the color thin film layer, and the organic protective layer is disposed on the light emitting side of the organic concentrating layer.
- the second pixel structure provided by the embodiment of the present invention includes a substrate 200, a thin film transistor 201 disposed on the substrate 200, and a passivation layer 202 disposed on the substrate 200 and partially covering the thin film transistor 201.
- a reflective electrode layer 203 on the layer 202 (ie, the reflective electrode layer 203 is disposed on a side of the organic light-emitting layer opposite to the side on which the organic light-concentrating layer is disposed), and is disposed on the reflective electrode layer 203
- the transparent electrode layer 204 electrically connected to the thin film transistor 201, the pixel electrode layer 205 disposed on the transparent electrode layer 204, and the OLED layer (ie, the organic light emitting layer) 206 disposed on the pixel electrode layer 205 are disposed on the organic light emitting layer.
- the thin film transistor 201 includes a gate electrode layer 2011 disposed on the substrate 200, a gate insulating layer 2012 disposed on the substrate 200 and covering the gate electrode layer 2011, and a semiconductor active layer 2013 disposed on the gate insulating layer 2012.
- the etch stop layer 2014 on the semiconductor active layer 2013 is provided on the drain electrode 2015a and the source electrode 2015b on both sides of the semiconductor active layer 2013, respectively.
- the transparent electrode layer 204 is electrically connected to the thin film transistor 201, and specifically includes: the transparent electrode layer 204 is electrically connected to the drain electrode 2015a of the thin film transistor 201 through the second contact hole 210, wherein the second contact hole The 210 penetrates the reflective electrode layer 203 and the passivation layer 202 and is connected to the drain electrode 2015a of the thin film transistor 201.
- the transparent electrode layer 204 electrically connected to the drain electrode 2015a of the thin film transistor 201 provides an anodic electrical signal to the organic luminescent layer 206
- the transmissive cathode metal layer 207 provides a cathode electrical signal for the organic luminescent layer 206.
- a part of the white light generated by the organic light-emitting layer 206 passes through the light-transmitting pixel electrode layer 205 and The transparent electrode layer 204 is incident on the reflective electrode layer 203, and the reflective electrode layer 203 reflects the received white light.
- the white light reflected by the reflective electrode layer 203 sequentially passes through the transparent electrode layer 204, the pixel electrode layer 205, and the organic light emitting layer 206.
- the cathode metal layer 207, the color thin film layer 208 and the organic light collecting layer 209; another portion of the white light generated by the organic light emitting layer 206 passes through the cathode metal layer 207, the color thin film layer 208 and the organic light collecting layer 209 in sequence.
- the color film layer 208 converts the white light generated by the received organic light-emitting layer 206 into colored light.
- the organic concentrating layer 209 collects the received colored light.
- the gate electrode layer 2011, the gate insulating layer 2012, the semiconductor active layer 2013, the etch stop layer 2014, the drain electrode 2015a, the source electrode 2015b, and the passivation layer 202 in the second pixel structure are in the first pixel structure.
- the gate electrode layer 1011, the gate insulating layer 1012, the semiconductor active layer 1013, the etch stop layer 1014, the drain electrode 1015a, the source electrode 1015b and the passivation layer 102 are similar, and are not described herein again.
- the reflective electrode layer 203 is formed of a material having a strong reflection effect on light, such as Ag (silver).
- the second pixel structure provided by the embodiment of the present invention further includes an organic protective layer 211 disposed above the organic concentrating layer 209 for protecting the second pixel structure from being invaded by air, moisture, and the like.
- the organic protective layer 211 is a transparent organic film having a light transmittance value greater than a set threshold.
- the set threshold can be set as needed, for example, set to 95%.
- organic protective layer of the pixel structure of the embodiment of the present invention may also adopt an organic protective layer commonly used in the field.
- the organic protective layer 211 has a thickness of 0.2 ⁇ m to 5 ⁇ m, and alternatively, the organic protective layer 211 has a thickness of 1 ⁇ m to 2 ⁇ m.
- the thickness of the organic concentrating layer 209 can be set as needed, for example, set to 0.2 ⁇ m to 5 ⁇ m, and alternatively, the thickness of the organic light-concentrating layer 209 is 1 ⁇ m to 2 ⁇ m.
- the organic concentrating layer 209 includes at least one second lens unit 212.
- the organic concentrating layer 209 includes 1 to 10 second lens units 212.
- the second lens unit 212 is a concave lens.
- the second lens unit 212 is a concave lens, and since the organic light-concentrating layer 209 is convex toward the light direction, the organic light-concentrating layer 209 can Achieving the emission of the organic light-emitting layer 206 The light in the directional direction is gathered. It is to be noted that since the organic concentrating layer 209 is convex toward the incoming light direction, light is refracted at the interface between the organic concentrating layer 209 and the organic protective layer 211, and light is generated at the organic protective layer 211. Gather.
- the shape of the cross section of the second lens unit 212 perpendicular to the planar direction of the substrate 200 is a circular arc shape, that is, the interface between the second lens unit 212 and the organic protective layer 211 (adjacent layer on the light exiting side thereof)
- the shape is a circular arc.
- the shape of the cross section of the second lens unit 212 parallel to the planar direction of the substrate 200 is circular, elliptical or rectangular.
- the organic concentrating layer 209 including the second lens unit 212 has a better concentrating effect.
- the materials of the organic light-concentrating layer 209 and the organic protective layer 211 are different.
- the refractive index of the organic protective layer 211 is greater than the refractive index of the organic concentrating layer 209.
- the refractive index of the organic protective layer 211 is larger than the refractive index of the organic concentrating layer 209, and the refracted light at the interface between the organic concentrating layer 209 and the organic protective layer 211 converges. Therefore, the ability of the organic light collecting layer 209 to collect the light emitted from the organic light emitting layer 206 is stronger.
- the second pixel structure further includes a free transfer layer 213 for directing light from the organic light-emitting layer 206 to various directions, a projection area of the free transfer layer 213 on the substrate 200 and the organic light-concentrating layer 209 on the substrate 200 The projected areas on the top do not overlap.
- the organic concentrating layer 209 in the second pixel structure is similar to the organic concentrating layer 111 in the first pixel structure, and the repeated portions are not described again.
- the pixel structure provided by the embodiment of the present invention is capable of collecting light from the organic light-emitting layer because the organic light-concentrating layer is disposed on the light-emitting side of the organic light-emitting layer, thereby enhancing the intensity of light emitted from the organic light-concentrating layer, thereby improving organic The display brightness of the illuminated display.
- the embodiment of the present invention further provides a method for fabricating the above pixel structure (a first pixel structure and a second pixel structure), including:
- An organic concentrating layer is prepared on the substrate, and an organic luminescent layer is prepared on the organic concentrating layer; or an organic luminescent layer is prepared on the substrate, and an organic concentrating layer is prepared on the organic luminescent layer.
- the method of fabricating the pixel structure is also different for different pixel structures, and the first pixel structure and the second pixel structure described in the embodiments will be separately described below.
- Step 401 preparing a thin film transistor on a substrate, and preparing a first passivation layer covering the thin film transistor on the thin film transistor;
- Step 402 preparing a color film layer on the first passivation layer
- Step 403 preparing an organic concentrating layer on the color film layer
- Step 404 preparing a planarization layer on the organic concentrating layer
- Step 405 preparing a second passivation layer on the planarization layer
- Step 406 forming a first contact hole penetrating the second passivation layer, the planarization layer, the organic light concentrating layer, the color thin film layer and the first passivation layer by photolithography, and exposing the drain electrode of the thin film transistor;
- Step 407 preparing a transparent electrode layer connected to the drain electrode of the thin film transistor through the first contact hole on the second passivation layer;
- Step 408 preparing a pixel electrode layer on the transparent electrode layer
- Step 409 preparing an organic light-emitting layer on the pixel electrode layer.
- step 401 preparing a thin film transistor on a substrate, specifically comprising: preparing a gate electrode layer on the substrate, preparing a gate insulating layer covering the gate electrode layer on the gate electrode layer, preparing on the gate insulating layer A semiconductor activation layer is formed on the semiconductor activation layer, and a drain electrode 1015a and a source electrode 1015b are formed on both sides of the semiconductor activation layer.
- step 401 preparing a first passivation layer covering the thin film transistor on the thin film transistor, specifically comprising: preparing on the thin film transistor by using a PECVD (plasma enhanced chemical vapor deposition) technique Covering the first passivation layer of the thin film transistor.
- PECVD plasma enhanced chemical vapor deposition
- step 403 preparing an organic concentrating layer on the color film layer, specifically comprising depositing an organic film layer having a transmittance greater than a specific threshold on the color film layer; covering the organic film layer with a semi-transparent reticle ;
- the organic film layer covering the mask is subjected to exposure treatment to obtain an organic concentrating layer.
- the prepared organic concentrating layer comprises a first lens unit which is a convex lens
- a mask which gradually decreases in transmittance from edge to center may be used as a mask covering the organic film layer, that is, semi-transparent.
- the reticle is a gradation mask of light transmittance.
- preparing a second passivation layer on the planarization layer comprises: preparing a second passivation layer on the planarization layer by using a PECVD technique.
- the method further includes: preparing a cathode metal layer on the organic light emitting layer.
- the organic concentrating layer may be located at multiple locations.
- the organic concentrating layer 111 may be located between the color thin film layer 103 and the planarization layer 104, and may be located between the planarization layer 104 and the second passivation layer 105. Between the second passivation layer 105 and the transparent electrode layer 106, the embodiment in which the organic concentrating layer is located at different positions is similar to the embodiment of the embodiment of the present invention, but is different for the organic concentrating layer. Position, the order in which the layers of the first pixel structure are made is different.
- Step 501 preparing a thin film transistor on a substrate, and preparing a passivation layer covering the thin film transistor on the thin film transistor;
- Step 502 preparing a reflective electrode layer on the passivation layer
- Step 503 forming a second contact hole penetrating the reflective electrode layer and the passivation layer by photolithography and exposing the drain electrode of the thin film transistor;
- Step 504 preparing a transparent electrode layer connected to the drain electrode of the thin film transistor through the second contact hole on the reflective electrode layer;
- Step 505 preparing a pixel electrode layer on the transparent electrode layer
- Step 506 preparing an organic light-emitting layer on the pixel electrode layer
- Step 507 preparing a cathode metal layer on the organic light-emitting layer
- Step 508 preparing a color film layer on the cathode metal layer
- Step 509 Prepare an organic concentrating layer on the color film layer.
- the method of fabricating the thin film transistor in the second pixel structure is similar to the method of fabricating the thin film transistor in the first pixel structure, and details are not described herein again.
- step 501 preparing a passivation layer covering the thin film transistor on the thin film transistor, specifically comprising:
- a passivation layer covering the thin film transistor is prepared on the thin film transistor by PECVD.
- preparing a reflective electrode layer on the passivation layer comprises: preparing a reflective electrode layer on the passivation layer by using a Sputter technique.
- step 509 preparing an organic concentrating layer on the color film layer, specifically comprising: Depositing an organic film layer having a light transmittance greater than a specific threshold on the color film layer;
- the organic film layer covering the mask is subjected to exposure treatment to obtain an organic concentrating layer.
- the prepared organic concentrating layer comprises a second lens unit which is a concave lens
- a mask having a gradually increasing transmittance from the edge to the center may be used as a mask covering the organic film layer, that is, semi-transparent.
- the reticle of light is a reticle with a light transmittance gradient.
- step 509 after preparing the organic concentrating layer on the color film layer, further comprising: preparing an organic protective layer on the organic concentrating layer.
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Abstract
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CN103887343B (zh) * | 2012-12-21 | 2017-06-09 | 北京京东方光电科技有限公司 | 薄膜晶体管及其制作方法、阵列基板和显示装置 |
US9905797B2 (en) * | 2013-10-25 | 2018-02-27 | Boe Technology Group Co., Ltd. | OLED display device and fabrication method thereof |
CN105185811B (zh) * | 2015-08-24 | 2018-06-26 | 昆山国显光电有限公司 | 一种具有增强可视角的显示装置及其制备方法 |
CN108352411B (zh) * | 2015-10-29 | 2020-11-27 | 三菱电机株式会社 | 薄膜晶体管基板 |
CN106444190B (zh) * | 2016-10-31 | 2020-05-19 | 深圳市华星光电技术有限公司 | 一种coa基板及其制造方法、液晶面板 |
CN106847861B (zh) * | 2016-12-26 | 2020-05-05 | 武汉华星光电技术有限公司 | 底发光型oled显示单元及其制作方法 |
CN110164873B (zh) * | 2019-05-30 | 2021-03-23 | 京东方科技集团股份有限公司 | 阵列基板的制作方法、阵列基板、显示面板及显示装置 |
CN113517326A (zh) * | 2021-05-25 | 2021-10-19 | 京东方科技集团股份有限公司 | 显示装置、显示面板及其制作方法 |
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US20150236303A1 (en) | 2015-08-20 |
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