KR20180024097A - Organic light emitting diode display integrated with solar cell and manufacturing method thereof - Google Patents

Abstract

According to an embodiment of the present invention, provided is a display device which comprises: a base substrate; a solar cell arranged on the base substrate; and an organic light emitting element planarly separated from the solar cell and arranged on the base substrate. The solar cell comprises: a cathode arranged on the base substrate; an N type semiconductor layer arranged on the cathode; a P type semiconductor layer arranged on the N type semiconductor layer; and an anode arranged on the P type semiconductor layer. The organic light emitting element comprises: a first electrode arranged on the base substrate; a light emitting layer arranged on the first electrode; and a second electrode arranged on the light emitting layer. The cathode is made of the same processes as the first electrode.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell hybrid type organic light emitting display and a manufacturing method thereof,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an organic light emitting display, and more particularly, to a solar cell hybrid type organic light emitting display.

Since the OLED display emits light when an electric current is applied, the organic light emitting display can be manufactured as a thin film without requiring a separate light source (backlight), and thus the OLED display can be formed in a transparent or curved substrate. As the flexible display is commercialized by applying it, it can be mounted on a glass of a curved vehicle.

Among the display devices used in existing vehicles, the HUD (Head UP Display) product uses a vehicle battery as a power source by mounting a display device reflecting the front glass of the vehicle. In the case of a passenger car, It was difficult to mount a large-area display due to the internal structure of the vehicle.

BACKGROUND ART [0002] In recent years, in a transparent organic light emitting display device having a transmissive mode capable of transmitting an image of an object placed opposite to a transparent organic light emitting display device in an OFF state and a display mode capable of implementing an image in an ON state, Interest is increasing.

Devices that utilize electricity generated by utilizing solar cells have been widely developed and used, and solar cells that are applied to automobiles have also been developed. Background Art [0002] Automobile solar cells have been developed to provide a large and flat area outside an automobile, for example, outside a roof of a passenger car, to secure a necessary auxiliary power.

The organic light emitting diode display according to the present invention can provide a solar cell hybrid type organic light emitting display capable of easily supplying electric power by using an external energy source such as a secondary battery as well as a solar cell as an energy source to binarize an energy source do.

Another object of the present invention is to provide a solar cell hybrid type organic light emitting display capable of improving the power generation efficiency of a solar cell by optimizing the mounting position of the solar cell.

In addition, the present invention proposes to manufacture a solar cell and an organic light emitting display panel in a series of successive processes, and a portion using the same material can be simultaneously deposited using the same mask, thereby shortening the manufacturing process and the manufacturing time Thereby providing a solar cell hybrid type organic light emitting display having cost competitiveness.

One embodiment of the present invention is a semiconductor device comprising: a base substrate; A solar cell disposed on the base substrate; And an organic light emitting diode disposed on the base substrate in a plan view and spaced apart from the solar cell, wherein the solar cell comprises: a cathode disposed on the base substrate; An N-type semiconductor layer disposed on the cathode; A P-type semiconductor layer disposed on the N-type semiconductor layer; And an anode disposed on the P-type semiconductor layer, wherein the organic light emitting device comprises: a first electrode disposed on the base substrate; A light emitting layer disposed on the first electrode; And a second electrode disposed on the light emitting layer, wherein the cathode has the same process as that of the first electrode.

The cathode is made of the same material as the first electrode.

The anode is formed in the same process as the second electrode.

The display device further includes a hole transporting layer disposed between the P-type semiconductor layer and the anode.

The first electrode is a transparent electrode, and the second electrode is a reflective electrode.

The first electrode is a reflective electrode, and the second electrode is a transparent electrode.

The display device further includes an encapsulation substrate sealing the organic light emitting element disposed on the anode and the second electrode.

The display device further includes a thin-film sealing layer disposed on the second electrode, wherein the thin-film sealing layer includes at least one inorganic film and at least one organic film alternately arranged.

The display device includes a transmission window disposed between the organic light emitting elements.

The base substrate is a glass for a vehicle.

The display device may be mounted on a vehicle and used for a vehicle.

According to another embodiment of the present invention, there is provided a method of manufacturing a solar cell, comprising: forming a solar cell on a base substrate; And forming an organic light emitting device spaced apart from the solar cell on the base substrate in a planar view, wherein the forming the solar cell comprises: forming a cathode on the base substrate; Forming an N-type semiconductor layer on the cathode; Forming a P-type semiconductor layer on the N-type semiconductor layer; And forming an anode on the P-type semiconductor layer, wherein the forming the organic light emitting device comprises: forming a first electrode on the base substrate; Forming a light emitting layer on the first electrode; And forming a second electrode on the light emitting layer, wherein the cathode is formed by the same process as the first electrode.

The step of forming the cathode and the first electrode includes a patterning step using one mask.

The step of forming the anode and the second electrode includes a deposition step using one mask.

The method further includes forming a hole transport layer before forming the light emitting layer after forming the first electrode of the organic light emitting device.

The manufacturing method further includes forming a hole transport layer before forming the anode after forming the P-type semiconductor layer of the solar cell.

The step of forming the hole transporting layer formed on the P-type semiconductor layer is performed simultaneously with the step of forming the hole transporting layer before the light emitting layer.

The solar cell hybrid type organic light emitting display device has an external energy source such as a secondary battery and has a solar cell part and is utilized as an internal energy source for assisting an external energy source. Accordingly, it is possible to improve the power consumption by binarizing the energy source, and it is possible to reuse the internal light energy by the organic light emitting device as well as the sunlight, so that it is more effective for improving the power consumption.

In addition, since the present invention can deposit a part of the solar cell and a part of the organic light emitting pixel using the same material at the same time using the same mask, the solar cell and the organic light emitting display panel can be manufactured by a series of continuous processes To provide a solar cell hybrid type organic light emitting display having cost competitiveness because it can shorten the manufacturing process and the manufacturing time.

1 is a plan view of a display device according to an embodiment of the present invention.
FIG. 2 is an enlarged view of an area A which is a part of a solar battery part in FIG.
FIG. 3 is a schematic sectional view enlarged on the basis of a cutting line I-I 'in FIG. 2. FIG.
FIG. 4 is a plan view of an organic light emitting device in which the region B is enlarged in FIG. 1; FIG.
5 is a cross-sectional view of the organic light emitting device cut along the cutting line II-II 'of FIG.
6 is a cross-sectional view illustrating a laminated structure of a solar cell and an organic light emitting diode according to an embodiment of the present invention.
7A to 7F are flow charts illustrating steps for fabricating an embodiment of the present invention.
8 is a cross-sectional view illustrating a stacked structure of a solar cell and an organic light emitting diode according to another embodiment of the present invention.
Fig. 9 shows an embodiment in which a transmission window is installed in parallel.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In the drawings, the thicknesses are enlarged to clearly indicate layers, films, or regions. It will be understood that when an element such as a layer, film, region, plate, or the like is referred to as being "on" or "on" another element, Conversely, when a part is said to be "directly above" another part, it means that there is no other part in the middle.

FIG. 1 is a plan view of a display apparatus according to an embodiment of the present invention, and schematically shows an organic light emitting diode unit 200 and a solar cell unit 100. The organic light emitting diode part 200 may be formed on the entire surface of the base substrate 211 or partially formed on the base substrate 211. For example, the organic light emitting diode unit 200 may be formed only in front of the driver's seat for a head-up display (HUD) of an automobile windshield.

Fig. 2 is an enlarged view of part A of the solar cell unit 100 in Fig. 1, showing a plan view of the solar cell.

FIG. 3 is an enlarged cross-sectional view taken along line I-I 'of FIG. 2 of the solar cell. The solar cell 110 includes a cathode 112, an N-type semiconductor layer 113, a P-type semiconductor layer 114, a hole transfer layer (HTL) 115, and an anode Layer 116 as shown in FIG. The upper portion of the anode layer 116 is closed with a transparent encapsulation substrate 117.

FIG. 4 is a plan view of an organic light emitting device in which the region B is enlarged in FIG. 1, and FIG. 5 is a cross-sectional view taken along a cutting line II-II 'of FIG.

In more detail, the OLED display according to an embodiment of the present invention includes a base substrate 211, a driving circuit 230, and an organic light emitting diode 310.

The base substrate 211 may be made of an insulating material selected from the group consisting of glass, quartz, ceramic, plastic, and the like

Since the base substrate 211 is a substrate that transmits light emitted from the organic light emitting device 310 or transmits external light required for the operation of the solar cell unit 110 in FIG. 6, the base substrate 211 must be formed of a transparent insulating substrate, Substrates, such as automotive glass, are also acceptable. More specifically, the base substrate 211 may be glass loaded on the vehicle. That is, the display device according to an embodiment of the present invention can be used for a vehicle loaded in a vehicle.

A buffer layer 220 is disposed on the base substrate 211. The buffer layer 220 may include one or more films selected from various inorganic films and organic films. The buffer layer 220 may be omitted.

The driving circuit portion 230 is disposed on the buffer layer 220. The driving circuit unit 230 includes a plurality of thin film transistors 10 and 20 and drives the organic light emitting diode 310. That is, the organic light emitting diode 310 emits light according to the driving signal received from the driving circuit 230 to display an image.

4 shows an active matrix (AM) type organic light emitting diode having a 2Tr-1Cap structure in which two thin film transistors (TFTs) 10 and 20 and one capacitor 80 are provided in one pixel. A display device is shown. However, an embodiment of the present invention is not limited to this structure. For example, an organic light emitting display device may include three or more thin film transistors and two or more charge storage elements in one pixel, and may further include a separate wiring. Here, the pixel is a minimum unit for displaying an image, and the organic light emitting display displays an image through a plurality of pixels.

One pixel includes a switching thin film transistor 10, a driving thin film transistor 20, a capacitor element 80, and an organic light emitting diode (OLED) The gate line 251 extending in one direction and the data line 271 and the common power line 272 insulated from the gate line 251 are also arranged in the driving circuit portion 230. One pixel may be defined as a boundary between the gate line 251, the data line 271, and the common power line 272, but is not limited thereto. A pixel may be defined by the pixel defining layer 290 or the black matrix.

The organic light emitting device 310 includes a first electrode 311, a hole transport layer 315 disposed on the first electrode 311, an organic light emitting layer 312, and a second electrode 313). The organic light emitting layer 312 is composed of a low molecular organic material or a high molecular organic material. Holes are injected from the first electrode 311 through the hole transport layer 315 and electrons are injected from the second electrode 313 into the organic light emitting layer 312. The excitons formed by combining the injected holes and electrons ) Falls from the excited state to the ground state.

The capacitor element 80 includes a pair of capacitor plates 258 and 278 disposed with an interlayer insulating film 260 interposed therebetween. Here, the interlayer insulating film 260 becomes a dielectric. The capacitances are determined by the voltage between the charge accumulated in the capacitor element 80 and the positive capacitor plates 258 and 278.

The switching thin film transistor 10 includes a switching semiconductor layer 231, a switching gate electrode 252, a switching source electrode 273, and a switching drain electrode 274. [ The driving thin film transistor 20 includes a driving semiconductor layer 232, a driving gate electrode 255, a driving source electrode 276, and a driving drain electrode 277. The semiconductor layers 231 and 232 and the gate electrodes 252 and 255 are insulated by the gate insulating film 240.

The switching thin film transistor 10 is used as a switching element for selecting a pixel to emit light. The switching gate electrode 252 is connected to the gate line 251. The switching source electrode 273 is connected to the data line 271. The switching drain electrode 274 is spaced apart from the switching source electrode 273 and connected to one of the capacitor plates 258.

The driving thin film transistor 20 applies a driving power to the first electrode 311, which is a pixel electrode, for emitting light of the organic light emitting layer 312 of the organic light emitting element 310 in the selected pixel. The driving gate electrode 255 is connected to the capacitor plate 258 connected to the switching drain electrode 274. The driving source electrode 276 and the other power storage plate 278 are connected to the common power supply line 272, respectively. The driving drain electrode 277 is connected to the first electrode 311 of the organic light emitting diode 310 through a contact hole provided in the planarization layer 265.

The switching thin film transistor 10 is operated by the gate voltage applied to the gate line 251 and transmits the data voltage applied to the data line 271 to the driving thin film transistor 20 . A voltage corresponding to the difference between the common voltage applied to the driving thin film transistor 20 from the common power supply line 272 and the data voltage transferred from the switching thin film transistor 10 is stored in the capacitor 80, ) Flows to the organic light emitting element 310 through the driving thin film transistor 20 so that the organic light emitting element 310 emits light.

The first electrode 311 may be a translucent electrode having light transmittance or a reflective electrode having light reflectivity. The second electrode 313 may be formed of a semi-transmissive film or a reflective film.

According to the present embodiment, the first electrode 311 is a reflection electrode, and the second electrode 313 is a transflective electrode. Light generated in the organic light emitting layer 312 is emitted through the second electrode 313.

The first electrode 311 is formed in the same process as the cathode 112 of the solar cell 110. The first electrode 311 is made of the same material as the cathode 112 of the solar cell 110.

A hole injection layer (HIL) may be further disposed between a hole transporting layer (HTL) disposed on the first electrode 311 and the organic light emitting layer 312, At least one of an electron transporting layer (ETL) and an electron injection layer (EIL) may be further disposed between the first electrode 313 and the second electrode 313. Since the organic light emitting layer 312, the hole injecting layer (HIL), the hole transporting layer (HTL), the electron transporting layer (ETL) and the electron injecting layer (EIL) can be made of an organic material, they are also referred to as an organic layer.

The pixel defining layer 290 has an opening. The opening of the pixel defining layer 290 exposes a part of the first electrode 311. The organic emission layer 312 and the second electrode 313 are sequentially stacked on the first electrode 311 in the opening of the pixel defining layer 290. [ Here, the second electrode 313 is formed on the pixel defining layer 290 as well as the organic light emitting layer 312. The hole injecting layer, the hole transporting layer, the electron transporting layer, and the electron injecting layer may be disposed between the pixel defining layer 290 and the second electrode 313. The organic light emitting diode 310 generates light in the organic light emitting layer 312 located in the opening of the pixel defining layer 290. In this manner, the pixel defining layer 290 may define a light emitting region.

The pixel defining layer 290 has a transmission window TA. The transmission window TA increases the aperture ratio of the display device.

A capping layer (not shown) may be disposed on the second electrode 313 to protect the organic light emitting diode 310 from the external environment.

Although not shown, the encapsulation substrate 117 may be disposed on the second electrode 313. The sealing substrate 117 serves to seal the organic light emitting element 310 together with the base substrate 211. The encapsulation substrate 117 may be made of an insulating material selected from the group consisting of glass, quartz, ceramics, plastic, and the like as the base substrate 211.

Referring to FIG. 5, the organic light emitting diode display according to an exemplary embodiment of the present invention includes a thin film encapsulation layer 350 disposed on a second electrode 313 to protect the organic light emitting diode 310. The thin film encapsulation layer 350 includes one or more inorganic films 351 and 353 and one or more organic films 352 to prevent outside air such as moisture or oxygen from penetrating the organic light emitting device 310.

The thin film encapsulation layer 350 has a structure in which the inorganic films 351 and 353 and the organic film 352 are alternately laminated. 5, the thin film encapsulation layer 350 includes two inorganic films 351 and 353 and one organic film 352, but the embodiment of the present invention is not limited thereto.

The inorganic films 351 and 353 include at least one inorganic material of Al ₂ O ₃ , TiO ₂ , ZrO ₂ , SiO ₂ , AlON, AlN, SiON, Si ₃ N ₄ , ZnO, and Ta ₂ O ₅ . The inorganic films 351 and 353 are formed by a chemical vapor deposition (CVD) method or an atomic layer deposition (ALD) method. However, the embodiment of the present invention is not limited thereto, and the inorganic films 351 and 353 may be formed through various methods known to those skilled in the art.

The organic film 352 is made of a polymer material. Here, the polymer material includes an acrylic resin, an epoxy resin, a polyimide, and a polyethylene. Further, the organic film 352 is formed through a thermal deposition process. The thermal deposition process for forming the organic film 352 proceeds within a temperature range that does not damage the organic light emitting device 310. [ However, the embodiment of the present invention is not limited thereto, and the organic film 352 may be formed through various methods known to those skilled in the art.

The inorganic films 351 and 353 in which the density of the thin film is densely formed mainly suppress the penetration of moisture or oxygen. Most of moisture and oxygen are blocked by the inorganic films 351 and 353 from penetrating into the organic light emitting element 210.

The moisture and oxygen that have passed through the inorganic films 351 and 353 are blocked again by the organic film 352. [ The organic film 352 is less effective in preventing moisture permeation than the inorganic films 351 and 353. However, the organic film 352 also functions as a buffer layer for reducing the stress between the inorganic films 351 and 353 and the inorganic films 351 and 353, in addition to the moisture permeation suppression. In addition, since the organic film 352 has a planarizing property, the top surface of the thin film sealing layer 350 can be flat.

The thin film encapsulation layer 350 may have a thin thickness of 10 mu m or less. Therefore, the organic light emitting display device can also have a thin thickness. By applying the thin film encapsulation layer 350 as described above, the organic light emitting display device can have a flexible characteristic.

6 is a cross-sectional view illustrating a laminated structure of a solar cell 110 and an organic light emitting diode 310 according to an embodiment of the present invention.

That is, FIG. 6 shows a cross-section in which the solar cell 110 and the organic light emitting diode 310 of the present invention used in the automotive windshield are constructed. For example, the organic light emitting diode 310 displays information on the indoor side (driver's side) of the vehicle on the basis of the front glass of the automobile. The solar battery 110 receives sunlight incident from the outside of the front glass, . ≪ / RTI > Since the information displayed on the organic light emitting diode 310 of the front glass is not for an outside person but for a driver, information is displayed inside the vehicle. At this time, external light passes through the front glass of the vehicle, Thereby causing a photoelectric phenomenon.

The structure of the solar cell hybrid organic light emitting diode of the present invention will be described with reference to FIG. The solar cell hybrid organic light emitting display according to an embodiment of the present invention includes a base substrate 211, an organic light emitting device 310 formed on the driving circuit unit 230 formed on the base substrate 211, And a solar cell 110 formed in a region other than the region of the organic light emitting device 310 of the light emitting device 211.

6, the driving circuit unit 230, the first electrode 311, the hole transport layer 315, the organic light emitting layer 312, and the second electrode 313, which is a transparent electrode, are sequentially stacked, (310) is shown as an example. In the organic light emitting diode 310, the first electrode 311 is formed of a conductive material having a high work function and the second electrode 313, which is a transparent electrode, is formed of a conductive material having a low work function. For example, the first electrode 311 may be formed of a triple layer of indium tin oxide (ITO), silver (Ag), or indium tin oxide (ITO). The first electrode 311 can reflect light by using silver (Ag) while securing a high work function by using indium tin oxide (ITO). The indium tin oxide (ITO) may be replaced with indium zinc oxide (IZO), indium oxide (In2O3), zinc oxide (ZnO), etc., and silver (Ag)

The second electrode 313, which is a transparent electrode on the upper side, is formed of a metal film having a thickness thin enough to transmit light. For example, the second electrode 313 may be formed of an alloy film of magnesium (Mg) - silver (Ag). When holes and electrons are injected into the organic light emitting layer 312 from the first electrode 311 and the second electrode 313, excitons in which electrons and holes are combined are generated in the organic light emitting layer 312, And light is emitted by the energy generated when the excited state falls from the excited state to the ground state. The organic light emitting element 310 displays an image using this light emission.

The solar cell 110 is formed in a region other than the region of the organic light emitting diode 310, and may be an organic thin film solar cell. The organic light emitting diode 310 has a stacked structure of a first electrode 311, a hole transport layer 315, an organic light emitting layer 312, and a transparent second electrode 313. At this time, the first electrode 311 is located closest to the base substrate 211, and the transparent second electrode 313 is located the farthest from the base substrate 211. The solar cell 110 has a stacked structure of a cathode 112, an N-type semiconductor layer 113, a P-type semiconductor layer 114, a hole transport layer 115, and an anode 116.

Examples of the donor material of the hole transport layer 115 of the solar cell 110 include poly (para-phenylene vinylene) (PPV) -based materials, derivatives of polythiophene (PT) Polyfluorene (PF) -based materials and copolymers thereof, or soluble polythiophene (P3HT), which is a crystalline polymer, can be used. The donor material should have a range of light absorption wavelengths that are well suited to the solar spectrum, and should have high light absorption and charge mobility. As the acceptor material of the hole transport layer 115, C60 itself or C60 derivatives (PCBM) designed to dissolve C60 in an organic solvent may be used. The acceptor material must have a higher electron affinity and charge mobility than the donor material. The hole transport layer 115 uses P3HT as the donor material and has the highest photoelectric efficiency when using PCBM as the acceptor material.

6, when the light is applied to the solar cell 110 through the thin film encapsulation layer 350, light is absorbed from the donor material of the hole transport layer 115, And the excitons diffuse in an arbitrary direction and are separated into electrons and holes at the interface with the acceptor material. The holes remaining in the donor layer move to the anode 116 due to the difference in the concentration of the accumulated electric charge and the internal electric field formed by the work function difference between the cathode 112 and the anode 116. The electrons move along the inside of the acceptor layer 112).

The solar cell 110 functions as an internal energy source by directly supplying electrons and holes to the second electrode 313 and the first electrode 311 of the organic light emitting diode 310 through appropriate control. That is, the organic light emitting diode 310 has an external energy source such as a secondary battery, and at the same time, the solar cell 110 is utilized as an internal energy source for assisting an external energy source. As a result, the organic light emitting display device can improve the power consumption by binarizing the energy source.

The first electrode 311 of the organic light emitting diode 310 is formed as a pixel electrode and is connected to the drain electrode of the driving thin film transistor through a contact hole. An organic light emitting layer 312 is formed on the first electrode 311 and a second electrode 313 covers the organic light emitting layer 312. The second electrode 313 is formed as a common electrode common to a plurality of pixels. The second electrode 313 is formed and then the thin film encapsulation layer 350 for blocking the outside is sealed on the side and the top of the organic light emitting element 310.

The cathode 112 of the solar cell 110 is formed of the same material as that of the first electrode 311 of the organic light emitting diode 310 and is formed simultaneously using the same mask when the first electrode 311 is formed on the substrate do.

An N-type semiconductor layer 113, a P-type semiconductor layer 114 and a hole transport layer 115 are stacked on the cathode 112 in this order and the material of the second electrode 313 of the organic light emitting element 310 And the anode 116 made of the same material as that of the solar cell 110 constitute the solar cell 110.

The N-type semiconductor layer 113 may be made of C60 (fullerene), for example, an N-type organic semiconductor material. Since C60 has a relatively high electron mobility of N-type organic semiconductor material, it can exhibit excellent efficiency. However, the present invention is not limited thereto, and the N-type semiconductor layer 113 may be made of an N-type semiconductor material doped with a pentavalent element (phosphorus, arsenic, etc.) in a silicon semiconductor.

The P-type semiconductor layer 114 may be made of, for example, a perovskite-structured material. The P-type semiconductor layer 114 made of a material having a perovskite structure may have optical transparency. A solar cell including a material having a perovskite structure is also referred to as a perovskite solar cell.

However, the present invention is not limited thereto, and the P-type semiconductor layer 114 may be made of a P-type semiconductor material doped with a trivalent element (boron, aluminum, etc.) in the silicon semiconductor.

Each layer of the solar cell 110 is formed in common over a plurality of pixels. Since the solar cell 110 is not required to be patterned in a separate mask, the manufacturing process of the hybrid type solar cell 110 according to the present invention can be simplified.

Figs. 7A to 7F are manufacturing process diagrams of the embodiment of the present invention shown in Fig.

In the present invention, the layers formed using the same materials as the materials of some layers of the solar cell 110 during the manufacturing process of the organic light emitting device can be formed in the same manufacturing process, thereby shortening the manufacturing process. That is, when the mask pattern for forming the first electrode 311 of the organic light emitting element is designed in the organic light emitting region on the base substrate 211, the first electrode 311 of the organic light emitting element region and the solar cell 110, The cathode 112 is formed of the same material and can be stacked simultaneously using the same mask.

First, Fig. 7A shows that the driving circuit portion 230 is formed on the automotive windshield.

7B shows the cathode 112 of the solar cell 110 being patterned and laminated in one mask by using the same material as the first electrode 311 of the organic light emitting diode 310 in the substrate of FIG. 7A.

FIG. 7C shows the N-type semiconductor layer 113 and the P-type semiconductor layer 114 stacked on the substrate of FIG. 7B only in the solar cell region. In order to form the P-type material layer and the N-type material layer necessary for the solar cell 110, the deposition is performed using a mask having a pattern covering all the organic light emitting elements 310. [

7D, the material of the hole transport layer 315 used in the organic light emitting device when forming the hole transport layer 315 necessary for the organic light emitting device is the same material (the same material) applied to the hole transport layer 115 of the solar cell 110 A pattern designed to expose a predetermined portion of the organic light emitting device region and a predetermined portion of the solar cell 110 may be formed using a single mask so that the two regions may be simultaneously deposited.

7E shows the organic light emitting layer 312 laminated on the organic light emitting element region. When forming the organic light emitting layer 312 of the organic light emitting diode 310, a predetermined shape may be formed in a necessary area of the organic light emitting layer 312 by using the mask pattern as a covering mask for the entire solar cell 110.

7F shows a process of laminating the anode 116 of the solar cell 110 into a single mask by using the same material as the second electrode 313 of the organic light emitting diode 310 on the substrate of FIG. 7E.

Thus, the organic light emitting device 310 and the solar cell 110 can be formed on one substrate, and the organic light emitting device 310 and the solar cell 110 can be manufactured at the same time, thereby simplifying the manufacturing process. In addition, electrons or holes collected from the anode 112 of the solar cell 110 may be appropriately supplied to the organic light emitting diode 310 to increase the power utilization efficiency.

8 is a cross-sectional view illustrating a stacked structure of a solar cell 110 and an organic light emitting diode 310 according to another embodiment of the present invention.

The display device of Fig. 8 can be applied to an automotive rear window. For example, the organic light emitting diode 310 displays information on the outside of the vehicle (rear vehicle side) based on the rear glass of the automobile, and the solar cell 110 receives sunlight incident from the outside of the rear glass And is configured to cause a photoelectric phenomenon.

Since the display information of the organic light emitting display device is configured not to be observed in the vehicle interior but to be visible to the outside or rear vehicle, the information displayed on the rear glass of the vehicle is displayed through the rear window.

In this embodiment, the stacking order is substantially the same, but the driving circuit part 230 of the organic light emitting element 310 is formed in the minimum possible area, and the first electrode 311 of the organic light emitting element 310 is formed as a reflective electrode It is preferable to use a transparent electrode in order to enhance the overall transparency.

When the organic light emitting device region including the anode 116 of the solar cell 110 as the upper electrode and the second electrode 313 of the organic light emitting device 310 is completed, the sealing member is sealed using the sealing material, Seal by bonding and, if necessary, finish with anti-shrink film or UV blocking film.

The encapsulant may be formed as a substrate having a transparent insulation property, which is located on the organic light emitting device 310 and the solar cell 110 in common. When the organic light emitting device 310, particularly the organic light emitting layer 312, is exposed to external moisture or oxygen, the light emitting property and lifetime characteristics are degraded. The thin film encapsulation layer 350 and the sealant surround the organic light emitting device 310 to prevent external moisture and oxygen from penetrating the organic light emitting device 310.

8, the thin film encapsulation layer 350 is disposed opposite to the base substrate 211 including the organic light emitting diode 310 and the solar cell 110. Although not shown, a sealant may be additionally disposed between the base substrate 211 and the thin-film encapsulating layer 350 so as to surround the organic light-emitting device 310 and the solar cell 110 integrally.

8, the embodiment of the present invention is applied to the rear glass of an automobile so that the solar light is received outside the base substrate 211, and the information display of the organic light emitting display is also outside the base substrate 211 And a display device configured to display the image. At this time, the driving circuit unit 230 of the organic light emitting diode 310 has a minimum area, and the first electrode 311 becomes a transparent electrode, so that the transmittance is improved, so that the displayed information is easily viewed from the outside.

In addition, according to the present invention, the solar cell 110 and the organic light emitting diode 310 can be made using a conventional automobile glass as a base substrate without employing a separate transparent member or a film. Particularly, since the front glass for an automobile has several layers such as a scattering prevention film, the solar cell 110 and the organic light emitting diode 310 can be configured by appropriately using these layers. The structure of the present invention can be changed in accordance with the purpose of arranging the solar cell 110 and the organic light emitting diode 310 in the automobile glass. For example, in order to observe information displayed on an organic light emitting display device including the organic light emitting device 310 from the inside of the vehicle, when the driver places the information on the front glass so that the operating information can be recognized, To be observed.

On the other hand, in a case where an organic light emitting display is disposed in a rear glass of an automobile and information is to be provided to a vehicle or an outsider operating from the rear of the automobile, for example, .

However, in any case, the structure of the solar cell 110 is the same as that of the solar cell 110 because it performs photoelectric development from external light.

In the present invention, transparency means a characteristic that a background image transmitted through a transparent organic light emitting display device is transparent. In order to improve the transparency, the distortion of the transmitted background must be minimized. For example, the surface of the substrate can be flat formed. If the surface of the substrate is not flat, transparency may be lowered due to refraction, scattering, reflection, etc. of the transmitted light. The respective layers having transparency disposed in the transmissive region can also be formed flat.

In the present invention, the visible light transmittance of the transparent components such as the cathode 112, the anode 116, the transparent auxiliary electrode and the transparent conductive oxide layer, which may be used when necessary, may be 80% or more.

FIG. 9 shows an embodiment in which a transmission window TA is installed in parallel.

For example, in the case where it is difficult to secure predetermined transparency despite the above-mentioned efforts to secure the transmittance, the embodiment according to Fig. 9 can be applied to ensure transparency. Since the transparency of the organic light emitting display device is limited as described above, the transmission window TA is arranged in parallel with each pixel or a plurality of pixels. When the display for a vehicle is employed in a front glass, the transmissivity is more important than a high resolution in view of operational safety. Therefore, if a space in which the organic light emitting display is not formed in parallel with a plurality of pixels is sufficiently secured, the transmittance of the entire display area is increased. By appropriately adjusting the ratio of the area of the transmission window (TA) and the area of the organic light emitting display area, an optimal combination applicable to the front glass and the side or rear glass of the vehicle is calculated.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Of course.

100: solar cell area 110: solar cell
112: cathode 113: N-type semiconductor layer
114: P-type semiconductor layer 115: Hole transport layer
116: cathode 117: sealing substrate
200: organic light emitting region 211: base substrate
230: Driving circuit part 10: Organic light emitting element
311: first electrode 312: organic light emitting layer
313: second electrode 315: hole transport layer
350: thin film encapsulation layer PA: pixel region
TA: Transmission window

Claims (16)

A base substrate;
A solar cell disposed on the base substrate; And
And an organic light emitting element disposed on the base substrate in a plan view and spaced apart from the solar cell,
In the solar cell,
A cathode disposed on the base substrate;
An N-type semiconductor layer disposed on the cathode;
A P-type semiconductor layer disposed on the N-type semiconductor layer; And
And an anode disposed on the P-type semiconductor layer,
The organic light-
A first electrode disposed on the base substrate;
A light emitting layer disposed on the first electrode; And
And a second electrode disposed on the light emitting layer,
Wherein the cathode has the same process as the first electrode. The method according to claim 1,
Wherein the anode has the same process as the second electrode. 3. The method of claim 2,
And a hole transport layer disposed between the P-type semiconductor layer and the anode. The display device of claim 1, wherein the first electrode is a transparent electrode and the second electrode is a reflective electrode. The display device according to claim 1, wherein the first electrode is a reflective electrode and the second electrode is a transparent electrode. The method according to claim 1,
And a sealing substrate sealing the organic light emitting element disposed on the anode and the second electrode. The method according to claim 1,
Further comprising a thin-film encapsulation layer disposed on the second electrode,
Wherein the thin film sealing layer comprises at least one inorganic film alternately arranged and at least one organic film. The method according to claim 1,
And a transmission window disposed between the organic light emitting elements. The method according to claim 1,
Wherein the base substrate is a glass for a vehicle. The display device according to claim 1, wherein the display device is mounted on a vehicle. Forming a solar cell on the base substrate; And
And forming an organic light emitting device spaced apart from the solar cell on the base substrate in a plan view,
The step of forming the solar cell comprises:
Forming a cathode on the base substrate;
Forming an N-type semiconductor layer on the cathode;
Forming a P-type semiconductor layer on the N-type semiconductor layer; And
And forming an anode on the P-type semiconductor layer,
The forming of the organic light-
Forming a first electrode on the base substrate;
Forming a light emitting layer on the first electrode; And
And forming a second electrode on the light emitting layer,
Wherein the cathode is formed by the same process as the first electrode. 12. The method of claim 11,
Wherein the step of forming the cathode and the first electrode includes a patterning step using one mask. 12. The method of claim 11,
Wherein the step of forming the anode and the second electrode includes a deposition step using one mask. 12. The method of claim 11,
And forming a hole transport layer before forming the light emitting layer after forming the first electrode of the organic light emitting device. 12. The method of claim 11,
Further comprising the step of forming a hole transporting layer after forming the p-type semiconductor layer of the solar cell and before forming the anode. 16. The method of claim 15,
Wherein the step of forming the hole transporting layer formed on the P-type semiconductor layer is performed simultaneously with the step of forming the hole transporting layer before the light emitting layer.

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