KR20170085180A

KR20170085180A - Display device

Info

Publication number: KR20170085180A
Application number: KR1020160004379A
Authority: KR
Inventors: 김현호; 김수연
Original assignee: 삼성디스플레이 주식회사
Priority date: 2016-01-13
Filing date: 2016-01-13
Publication date: 2017-07-24

Abstract

A display device according to an embodiment of the present invention includes a first light emitting layer, a second light emitting layer, and a third light emitting layer that are spaced apart from each other in a first direction, and a fourth light emitting layer A display unit including a light emitting layer, a fifth light emitting layer, and a sixth light emitting layer, a plurality of first solar cells positioned between the fourth light emitting layer and the fifth light emitting layer, and between the fifth light emitting layer and the sixth light emitting layer, And a plurality of second solar cell units positioned between the first light emitting layer and the second light emitting layer and between the second light emitting layer and the third light emitting layer, wherein the plurality of first solar cell units are connected in series And the plurality of second solar cell units are connected in parallel with each other.

Description

Display device {DISPLAY DEVICE}

The present invention relates to a display device, and more particularly to a display device including a solar cell.

As a display device, a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting diode (OLED) device, a field effect display FED, an electrophoretic display device, and the like are known.

Among them, the organic light emitting display has a self-luminance characteristic, and unlike a liquid crystal display device, a separate light source is not required, so that thickness and weight can be reduced. Further, the organic light emitting display device has high-quality characteristics such as low power consumption, high luminance, and fast response speed.

Meanwhile, in recent years, the use environment of portable electronic devices such as smart phones has diversified into document creation, web browsing, electronic games, multimedia contents viewing, etc., and the use time and frequency of use of display devices are increasing. Therefore, improvement of the power consumption of the display device is urgently required.

Embodiments of the present invention provide a display device capable of improving power consumption.

The display unit includes a first substrate, a pixel electrode located on the first substrate, a pixel defining layer located on the pixel electrode and having an opening overlapping the pixel electrode, a light emitting layer located in the opening of the pixel defining layer, And a common electrode which is located at a predetermined position.

The plurality of first solar cell portions and the plurality of second solar cell portions may overlap with the pixel defining layer.

The plurality of first solar cell units and the plurality of second solar cell units may include first electrodes, second electrodes overlapping with the first electrodes, and second and third solar cells positioned between the first and second electrodes. And a photoactive layer.

The first electrodes of the plurality of first solar cell units may be connected to the second electrodes of the adjacent first solar cell units.

The first electrodes of the plurality of second solar cell units may be connected to the first electrodes of adjacent second solar cell units and the second electrodes of the plurality of second solar cell units may be connected to the adjacent second And may be connected to the second electrodes of the solar cell units.

The second electrodes of the plurality of first solar cell units may extend to the first electrodes of the first solar cell units overlapping with the light emitting layer and connected to each other.

The second electrodes may include a plurality of protrusions.

The solar cell part overlaps with the light emitting layer, and the light transmittance of the solar cell part may be about 50% or more.

The display unit may include a pixel electrode located between the plurality of first solar cell units, a light emitting layer located on the pixel electrode, and a common electrode located on the light emitting layer.

The plurality of first solar cells and the plurality of second solar cells may include a second substrate, first electrodes positioned between the first substrate and the second substrate, second electrodes overlapping the first electrodes, And a photoactive layer located between the first electrodes and the second electrodes.

The display device according to embodiments of the present invention includes a plurality of solar cells connected in series and in parallel, thereby improving the efficiency of solar cells and improving power consumption.

1 is a layout diagram of a display device according to an embodiment of the present invention.
Fig. 2 is a layout diagram showing a part of Fig.
Fig. 3 is a layout diagram showing a part of Fig.
4 is a cross-sectional view taken along line IV-IV in Fig.
5 is a cross-sectional view cut along the line VV in Fig.
6 is a diagram showing a connection relationship of solar cells of a display device according to an embodiment of the present invention.
7 is a cross-sectional view of a display device according to another embodiment of the present invention.
8 is a cross-sectional view of a display device according to another embodiment of the present invention.
9 is a cross-sectional view of a display device according to another embodiment of the present invention.
10 is a cross-sectional view of a display device according to another embodiment of the present invention.

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, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

In addition, since the sizes and thicknesses of the respective components shown in the drawings are arbitrarily shown for convenience of explanation, the present invention is not necessarily limited to those shown in the drawings.

In the drawings, the thickness is enlarged to clearly represent the layers and regions. In the drawings, for the convenience of explanation, the thicknesses of some layers and regions are exaggerated. Whenever a portion such as a layer, film, region, plate, or the like is referred to as being "on" or "on" another portion, it includes not only the case where it is "directly on" another portion but also the case where there is another portion in between.

Also, throughout the specification, when an element is referred to as "including" an element, it is understood that the element may include other elements as well, without departing from the other elements unless specifically stated otherwise. Also, throughout the specification, "above," " upper, ", "below," or "lower ", means to be located above or below the object portion, And the like.

Further, in the entire specification, when it is referred to as a "plane", this means that the object portion is viewed from above, and when it is referred to as "section", this means that the object portion is viewed from the side.

First, a display device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG.

FIG. 1 is a layout diagram of a display apparatus according to an embodiment of the present invention, FIG. 2 is a layout diagram showing a part of FIG. 1, and FIG. 3 is a layout diagram showing a part of FIG. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 1, and FIG. 5 is a cross-sectional view taken along line V-V in FIG. 6 is a diagram showing a connection relationship of solar cells of a display device according to an embodiment of the present invention.

1 to 3, a display device according to an embodiment of the present invention includes a first pixel PA, a second pixel PB, and a third pixel PC. The first pixel PA, the second pixel PB, and the third pixel PC may display different colors.

The first pixel PA, the second pixel PB and the third pixel PC are spaced apart from each other along the second direction D2 different from the first direction D1 and the first direction D1, Respectively. The first pixel PA, the second pixel PB and the third pixel PC are arranged in order along the first direction D1 to form a first row and the third pixel PC, The first pixel PA and the second pixel PB are sequentially positioned to form a second row and the second pixel PB, the third pixel PC and the first pixel PA are arranged in order, They form a line.

Similarly, the first pixel PA, the third pixel PC and the second pixel PB are arranged in order along the second direction D2 to form the first column, The first pixel PA and the third pixel PC are sequentially positioned to form the second column and the third pixel PC, the second pixel PB, and the first pixel PA, Are placed in order to form the third row.

However, the arrangement of the first pixel PA, the second pixel PB, and the third pixel PC is not limited thereto, and various arrangements can be applied.

Although not shown, according to another embodiment of the present invention, the display device further includes a pixel for displaying a color other than the first pixel PA, the second pixel PB, and the third pixel PC .

The areas of the first pixel PA, the second pixel PB, and the third pixel PC correspond to the opening areas of the pixel defining layer PDL. This will be described in detail later.

The display device according to the present embodiment includes a plurality of first solar cells SCA0, SCA1 and SCA2 and a plurality of second solar cells SCB0, SCB1 and SCB2 overlapping with a part of the pixel defining layer PDL do.

The plurality of first solar cells SCA0, SCA1, SCA2 are arranged along the second direction D2 and are connected to each other. Each of the plurality of first solar cells SCA0, SCA1 and SCA2 includes a first electrode 210 and a second electrode 250 to be described later, and a plurality of first solar cells SCA0, SCA1 and SCA2, The first electrode 210 and the second electrode 250 of the first solar cells SCA0, SCA1, and SCA2 adjacent to each other are connected to each other.

The plurality of second solar cells SCB0, SCB1 and SCB2 are arranged along the first direction D1. Each of the plurality of first solar cells SCA0, SCA1, SCA2 includes a first electrode 210 and a second electrode 250. Although not shown, the plurality of second solar cells SCB0, SCB1 and SCB2 are connected to each other and the first electrodes 210 of the plurality of second solar cells SCB0, SCB1 and SCB2 are connected to the first electrode 210 And the second electrodes 250 of the plurality of second solar cells SCB0, SCB1 and SCB2 are connected to each other.

4 and 5, the structure of a display device according to an embodiment of the present invention will be described in more detail.

4 and 5, a display device according to an embodiment includes a display portion 100 and solar battery units SCA1, SCA2, and SCB.

The display unit 100 includes a first substrate 110, an insulating layer 120 disposed on the first substrate 110, a pixel defining layer PDL disposed on the insulating layer 120, the first pixel electrode E1A, the second pixel electrode E1B and the third pixel electrode E1C, the first pixel electrode E1A, the second pixel electrode E1B, and the third pixel electrode E1A, The second light emitting layer OLB, the third light emitting layer OLC, the first light emitting layer OLA, the second light emitting layer OLB, and the third light emitting layer OLC located above the first light emitting layer OL1, And a sealing member 130 positioned above the common electrode E2 and the common electrode E2.

Although not shown, the display unit 100 further includes a circuit unit for transmitting a predetermined voltage to the first pixel electrode E1A, the second pixel electrode E1B, the third pixel electrode E1C, and the common electrode E2 .

The first substrate 110 may be made of glass, quartz, ceramics, metal, plastic, or the like. The first substrate 110 may have a flexible characteristic, a stretchable or rollable characteristic.

The insulating film 120 may include a plurality of insulating layers as a layer capable of insulating the components in the circuit portion. The insulating layer 120 may include at least one of an organic insulating layer and an inorganic insulating layer.

The pixel defining layer PDL has an opening overlapped with the first pixel electrode E1A, the second pixel electrode E1B and the third pixel electrode E1C. The pixel defining layer PDL includes a first emission layer OLA, a second emission layer OLB, And the third light emitting layer OLC are in contact with the second pixel electrode E1B and the third pixel electrode E1C in the opening of the pixel defining layer PDL.

The pixel defining layer (PDL) may be a resin such as polyamide, polyacrylates or polyimides, a siloxane resin, or a silica-based inorganic material.

The first pixel electrode E1A, the second pixel electrode E1B and the third pixel electrode E1C may be formed of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide Of a transparent material.

The first light emitting layer OLA, the second light emitting layer OLB, and the third light emitting layer OLC include organic materials emitting light of different colors. For example, the first light emitting layer OLA, the second light emitting layer OLB, and the third light emitting layer OLC may have any one of primary colors such as red, green, and blue primary colors, The organic light emitting device displays a desired image with a spatial sum of these colors.

Alternatively, the first OLED, the second OLED, and the third OLED may be formed by laminating a red organic light emitting layer, a green organic light emitting layer, and a blue organic light emitting layer all together in a red pixel, a green pixel, and a blue pixel , And a red color filter, a green color filter, and a blue color filter are formed for each pixel to realize a color image.

As another example, a color image may be realized by forming a white organic light emitting layer emitting white light in both red pixels, green pixels, and blue pixels, and forming red, green, and blue color filters, respectively, for each pixel. When a color image is realized using a white organic light emitting layer and a color filter, a deposition mask for depositing a red organic light emitting layer, a green organic light emitting layer, and a blue organic light emitting layer on respective individual pixels, that is, red pixel, green pixel and blue pixel You do not have to do.

The white organic light emitting layer described in other examples may be formed of one organic light emitting layer, and may include a structure in which a plurality of organic light emitting layers are stacked to emit white light. For example, a configuration in which at least one yellow organic light emitting layer and at least one blue organic light emitting layer are combined to enable white light emission, a configuration in which at least one cyan organic light emitting layer and at least one red organic light emitting layer are combined to enable white light emission, And a structure in which at least one magenta organic light emitting layer and at least one green organic light emitting layer are combined to enable white light emission.

The first light emitting layer OLA, the second light emitting layer OLB and the third light emitting layer OLC may be formed of a light emitting layer, a hole injection layer (HIL), a hole transporting layer (HTL), an electron transporting layer an electron-transporting layer (ETL), and an electron-injection layer (EIL).

When the first light emitting layer OLA, the second light emitting layer OLB, and the third light emitting layer OLC include a plurality of layers, the first pixel electrode E1A and the second pixel electrode E1B, which are anode electrodes, And the third pixel electrode E1C, and a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer may be sequentially stacked thereon.

The common electrode E2 is located on the first light emitting layer OLA, the second light emitting layer OLB, and the third light emitting layer OLC. The common electrode E2 may be formed of a transparent conductive material such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), ZnO (zinc oxide), or In2O3 (Indium Oxide), or a conductive material such as lithium (Li), calcium (Ca), lithium fluoride Or a reflective metal such as calcium (LiF / Ca), lithium fluoride / aluminum (LiF / Al), aluminum (Al), silver (Ag), magnesium (Mg), or gold (Au).

The sealing member 130 serves as a sealing member covering and protecting the plurality of pixels PA, PB, and PC. The sealing member 130 may be made of a transparent insulating substrate such as a transparent glass substrate or a transparent polymer film. The sealing member 130 may be flexible in the case of a transparent polymer film.

The solar cells SCA1, SCA2 and SCB include a first electrode 210 and a second electrode 250, a photoactive layer 230 located between the first electrode 210 and the second electrode 250, A first buffer layer 220 located between the electrode 210 and the photoactive layer 230 and a second buffer layer 240 located between the second electrode 250 and the photoactive layer 230.

The first electrode 210 may be a cathode electrode collecting electrons and the second electrode 250 may be an anode electrode collecting holes. The second electrode 250 is formed of a conductive material having a work function higher than that of the first electrode 210 and is formed of a metal film having a thickness thin enough to transmit light. For example, the second electrode 250 may comprise a double layer of zinc sulphide (ZnS) / silver (Ag).

The photoactive layer 230 may be composed of a D / A bi-layer or a composite structure (D + A) blend of a donor (electron donor) material and an acceptor . Meanwhile, the photoactive layer 230 may have a structure in which a complex structure ((D + A) blend) is laminated between the donor layer and the acceptor layer.

The first buffer layer 220 may be an n-buffer layer, and the second buffer layer 240 may be a p-buffer layer. The n-buffer layer functions as an electron transporting layer, and the p-buffer layer functions as a hole transporting layer to enhance the photoelectric efficiency of the solar cell portion (SCB). However, the first buffer layer 220 and the second buffer layer 240 may be reversed.

Examples of the donor material of the photoactive layer 230 include polyparaphenylene 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 acceptor material of the light active layer 230 may include derivatives C ₆₀ (fullerene derivatives) (PCBM), designed to be used it is C ₆₀ or C ₆₀ to itself soluble in the organic solvent. The acceptor material must have a higher electron affinity and charge mobility than the donor material.

When light is applied to the solar cells SCA1, SCA2, and SCB, excitons in an excited state are generated by absorbing light from the donor material of the photoactive layer 230. The excitons spread in an arbitrary direction, At the interface with matter, electrons and holes are separated. The holes remaining in the donor layer move to the second electrode 250 due to the difference in concentration between the internal electric field formed by the work function difference between the first electrode 210 and the second electrode 250 and the accumulated electric charge, And moves to the first electrode 210 along the inside of the layer. As described above, the electrons move to the first electrode 210 and the holes move to the second electrode 250, so that the current can flow.

The solar battery units SCA1, SCA2 and SCB are used to supply power to the display unit 100. [ By supplying power to the display unit 100 through the solar battery units SCA1, SCA2, and SCB, the power consumption of the display device can be improved.

Referring again to FIG. 1, the display device according to the present embodiment includes a plurality of first solar cells SCA0, SCA1, and SCA2, and a plurality of second solar cells SCB0, SCB1, and SCB2.

The plurality of second solar cells SCB0, SCB1 and SCB2 are arranged along the first direction D1 and the plurality of first solar cells SCAO, SCA1 and SCA2 are arranged along the second direction D2. Respectively.

Referring to FIG. 4 together with FIG. 1, a plurality of second solar cells SCB0, SCB1, SCB2 extend along a second direction D2 so as not to overlap with a plurality of pixels PA, PB, PC. Although not shown, the first electrodes 210 of the plurality of second solar cells SCB0, SCB1 and SCB2 are connected to each other and the second electrodes 250 of the plurality of second solar cells SCB0, SCB1 and SCB2 Are connected to each other. That is, the plurality of second solar cells SCB0, SCB1, and SCB2 are connected in parallel.

5, the first electrode 210 of the plurality of first solar cells SCA1 and SCA2, the first buffer layer 220, the photoactive layer 230, and the second buffer layer 220, (240) is disposed at a position overlapping the pixel defining layer (PDL) of the display portion (100). However, the second electrode 250 is extended to overlap with the first light emitting layer OLA, the second light emitting layer OLB, and the third light emitting layer OLC. Accordingly, the second electrode 250 of the first solar cells SCA1 and SCA2 is extended and connected to the first electrode 210 of the adjacent first solar cells SCA1 and SCA2.

The first electrodes 210 of the first solar cells SCA0, SCA1 and SCA2 arranged along the second direction D2 are connected to the second electrodes of the first solar cells SCA0, SCA1 and SCA2, And is connected to the electrode 250. Accordingly, the plurality of first solar cells SCAO, SCA1, SCA2 are connected in series.

The connection relationship of the solar cells of the display device according to the embodiment of the present invention will now be described with reference to FIG.

As described above, the second electrode 250 of the plurality of first solar cells SCA1 and SCA2 is extended and connected to the first electrode 210 of the adjacent first solar cells SCA1 and SCA2. That is, the cathodes and the anodes of the plurality of first solar cells SCA1 and SCA2 are connected to each other and connected in series along the second direction.

The anodes of the plurality of second solar cells SCB1 and SCB2 are connected to each other through the first connection unit C1 together with the anodes of the adjacent first solar cells and the anodes of the plurality of second solar cells SCB1 and SCB2 The cathodes are connected to each other through the second connection portion C2 together with the cathodes of the adjacent first solar cells. As such, the plurality of second solar cells SCB1 and SCB2 are connected in parallel.

When a plurality of cells are connected in series, the total current value of the cells is the sum of the current values of the respective cells, and when the cells are connected in parallel, the total voltage of the cells becomes the sum of the voltages of the respective cells. When a plurality of cells are connected in series or only in parallel, one of the current and voltage value is relatively large, but the other is relatively small. The value of the power P is proportional to the value of the current I and the value of the voltage V. [ Therefore, in order to increase the power efficiency of the plurality of cells, serial connection and parallel connection must be simultaneously performed. The plurality of solar cells of the display device according to the embodiment of the present invention may include a plurality of first solar cells connected in series and a plurality of second solar cells connected in parallel to increase the power efficiency of the solar cell.

In addition, the parameters that determine the efficiency of the solar cell are open-circuit voltage (Voc), short-circuit current (Jsc), and fill factor (FF).

The open circuit voltage (Voc) is a potential difference formed at both ends of the solar cell when light is received in a state where the circuit is opened, that is, an infinite impedance is applied. This open circuit voltage (Voc) value becomes large when a plurality of solar cells are connected in parallel.

The short circuit current (Jsc) is the reverse (negative) current density that appears when the circuit is shorted, that is, when it receives light in the absence of external resistance. This short circuit current (Jsc) value becomes large when a plurality of solar cells are connected in series.

The fill factor (FF) is a value indicating how close the shape of the J-V curve is to the square when the light is applied. If the value of the fill factor (FF) increases, the efficiency of the solar cell increases. The fill factor FF becomes large only when both the open circuit voltage Voc and the short circuit current Jsc are large.

If a solar cell overlapping the entire surface of the pixel definition layer (PDL) of the display unit is formed like a conventional display device, the solar cell is the same as a case where a plurality of solar cells are connected in parallel, The short circuit current Jsc becomes small. As a result, the fill factor (FF) also becomes low.

However, since the display device according to the embodiment of the present invention includes the plurality of first solar cell units connected in series and the plurality of second solar cell units connected in parallel, the open circuit voltage (Voc) value and the short circuit current (Jsc) can be increased. Therefore, the efficiency of the solar cell is increased.

As such, the display device according to the present embodiment includes a plurality of solar cells, and the solar cells include first solar cells connected in series and second solar cells connected in parallel. Therefore, by using a plurality of solar cells, it is possible to supply power to the display unit to improve the power consumption of the display device, increase the efficiency of a plurality of solar cells by connecting a plurality of solar cells in series and simultaneously in parallel , It is possible to improve the power consumption of the display device.

Referring to FIG. 7, a display device according to another embodiment of the present invention will be described. 7 is a cross-sectional view of a display device according to another embodiment of the present invention.

The display device according to another embodiment of the present invention shown in FIG. 7 is similar to the display device according to the above-described embodiment. A detailed description of the same components will be omitted.

Referring to FIG. 7, the display device according to the present embodiment includes a solar cell SC instead of a pixel definition layer (PDL). This will be described in detail.

The display device according to the present embodiment includes a first substrate 110, an insulating film 120 disposed on the first substrate 110, a solar battery SC located on the insulating film 120, a solar battery SC, The first pixel electrode E1A, the second pixel electrode E1B and the third pixel electrode E1C, the first pixel electrode E1A, and the second pixel electrode E1A, which are disposed on the interlayer insulating film 120a, the interlayer insulating film 120a, The first light emitting layer OLA, the second light emitting layer OLB and the third light emitting layer OLC, the first light emitting layer OLA, the second light emitting layer OLB, and the second light emitting layer OLT located on the electrode E1B and the third pixel electrode E1C, A common electrode E2 positioned on the third light emitting layer OLC and a sealing member 130 located on the common electrode E2.

That is, the display device according to this embodiment omits the pixel defining layer PDL and uses the solar cell SC to form the first light emitting layer OLA, 2 light emitting layer OLB and the third light emitting layer OLC are located. As described above, the thickness of the display device can be made thinner by omitting the pixel defining layer (PDL) and using the solar battery SC.

Although not shown, the solar battery SC of the display device according to the present embodiment includes a plurality of first solar cells SCA0, SCA1, SCA2 and a plurality of second solar cells SCB0, SCB1, SCB2 do. The cathodes and the anodes of the plurality of first solar cells SCA0, SCA1 and SCA2 are connected to each other in series along the second direction and the cathodes of the plurality of second solar cells SCB0, SCB1 and SCB2 Between the cathodes, the anodes are connected to each other and the anodes are connected in parallel along the first direction.

As such, the display device according to the present embodiment includes a plurality of solar cells, and the solar cells include first solar cells connected in series and second solar cells connected in parallel. Accordingly, power efficiency of a plurality of solar cells can be increased by supplying power to the display unit using a plurality of solar cells, connecting a plurality of solar cells in series, and connecting them in parallel.

Next, a display device according to another embodiment of the present invention will be described with reference to FIG. 8 is a cross-sectional view of a display device according to another embodiment of the present invention.

The display device according to another embodiment of the present invention shown in FIG. 8 is similar to the display device according to the above-described embodiment. A detailed description of the same components will be omitted.

Referring to FIG. 8, the display device according to the present embodiment includes a solar battery SC attached to the display unit 100, and a solar battery SC is formed on the second substrate 110A.

The second substrate 110A may be made of glass, quartz, ceramic, metal, plastic, or the like, and may have a flexible characteristic, a stretchable or rollable characteristic.

A first electrode 210 and a second electrode 250 are formed between the second substrate 110A and the first substrate 110 and a photoactive layer 230 located between the first and second electrodes 210 and 250 A first buffer layer 220 located between the first electrode 210 and the photoactive layer 230 and a second buffer layer 240 located between the second electrode 250 and the photoactive layer 230 A solar battery (SC) is located.

As described above, in the display device according to the present embodiment, the second substrate 110A including the solar battery SC and the display unit 100 are attached to each other. If the display unit 100 and the solar battery unit SC are separately formed using separate substrates, it is possible to replace the display unit 100 and the solar battery unit SC when defects are generated in any of the manufacturing processes, .

Next, a display device according to another embodiment of the present invention will be described with reference to FIG. 9 is a cross-sectional view of a display device according to another embodiment of the present invention.

The display device according to another embodiment of the present invention shown in FIG. 9 is similar to the display device according to the above-described embodiment. A detailed description of the same components will be omitted.

Referring to FIG. 9, in the display device according to the present embodiment, the second electrode 250 of the solar cell unit includes a protrusion 250a. By forming the protrusions 250a on the second electrode 250, the angle of incidence of the incident external light is varied to increase the amount of light incident on the solar cell portion, and the light emitted from the display portion 100, Refracted in the solar cell unit 250a, and incident on the solar cell unit, thereby increasing the efficiency of the solar cell unit.

A display device according to another embodiment of the present invention will now be described with reference to FIG. 10 is a cross-sectional view of a display device according to another embodiment of the present invention.

The display device according to another embodiment of the present invention shown in FIG. 10 is similar to the display device according to the above-described embodiment. A detailed description of the same components will be omitted.

10, the first electrode 210 and the second electrode 250 of the solar cell SC, the photoactive layer 230 located between the first electrode 210 and the second electrode 250, A first buffer layer 220 located between the first electrode 210 and the photoactive layer 230 and a second buffer layer 240 located between the second electrode 250 and the photoactive layer 230 are formed in the pixel defining layer PDL and a part of the first light emitting layer OLA, the second light emitting layer OLB and the third light emitting layer OLC. The solar battery unit SC of the display apparatus according to the present embodiment can transmit at least about 50% of the incident light.

The light transmittance of the solar battery unit SC is increased and the area of the solar battery unit can be enlarged by partially overlapping the solar battery unit SC with the light emitting unit of the display unit 100. [

As described above, by increasing the light transmittance of the solar battery unit SC, the light emitted from the display unit 100 is externally displayed, and the area of the solar battery unit SC is expanded to increase the efficiency of the solar battery unit .

100:
110, 110A: substrate
120: insulating film
130: sealing member
210: first electrode
220, 240: buffer layer
230: photoactive layer
250: second electrode
E1A, E1B, and E1C:
E2: common electrode
OLA, OLB, OLC: light emitting layer
PA, PB, PC: pixel
PDL: pixel definition layer
SC: Solar Whole Branch

Claims

A first luminescent layer, a second luminescent layer, and a third luminescent layer which are disposed apart from each other in the first direction, and
A display unit including a fourth light emitting layer, a fifth light emitting layer, and a sixth light emitting layer disposed apart from each other in a second direction different from the first direction,
A plurality of first solar cell portions located between the fourth light emitting layer and the fifth light emitting layer, and between the fifth light emitting layer and the sixth light emitting layer, and
And a plurality of second solar cell units positioned between the first and second light emitting layers and between the second and third light emitting layers,
Wherein the plurality of first solar cell units are connected in series with each other,
Wherein the plurality of second solar cell units are connected in parallel with each other.

The method of claim 1,
The display unit
The first substrate,
A pixel electrode disposed on the first substrate,
A pixel defining layer located above the pixel electrode and having an opening overlapping with the pixel electrode,
A light-emitting layer located in the opening of the pixel defining layer, and
And a common electrode disposed on the light emitting layer,
The plurality of first solar cell portions and the plurality of second solar cell portions overlap the pixel defining layer,
The plurality of first solar cell portions and the plurality of second solar cell portions
The first electrodes,
Second electrodes overlapping the first electrodes, and
And a photoactive layer disposed between the first electrodes and the second electrodes,
Wherein the first electrodes of the plurality of first solar cell units are connected to the second electrodes of the adjacent first solar cell units,
The first electrodes of the plurality of second solar cell units are connected to the first electrodes of the adjacent second solar cell units,
And the second electrodes of the plurality of second solar cell units are connected to the second electrodes of the adjacent second solar cell units.

3. The method of claim 2,
Wherein the second electrodes of the plurality of first solar cell units extend to the first electrodes of the first solar cell units overlapping with the light emitting layer and connected to each other.

3. The method of claim 2,
And the second electrodes include a plurality of protrusions.

5. The method of claim 4,
Wherein the second electrodes of the plurality of first solar cell units extend to the first electrodes of the first solar cell units overlapping with the light emitting layer and connected to each other.

3. The method of claim 2,
Wherein the solar cell part overlaps the light emitting layer,
Wherein the light transmittance of the solar cell portion is about 50% or more.

The method of claim 6,
Wherein the second electrodes of the plurality of first solar cell units extend to the first electrodes of the first solar cell units overlapping with the light emitting layer and connected to each other.

The method of claim 1,
The plurality of first solar cell portions and the plurality of second solar cell portions
The first substrate,
First electrodes disposed on the first substrate,
Second electrodes overlapping the first electrodes, and
And a photoactive layer disposed between the first electrodes and the second electrodes,
The display unit
A pixel electrode located on the first substrate and located between the plurality of first solar cell units,
A light emitting layer disposed on the pixel electrode, and
And a common electrode disposed on the light emitting layer,
Wherein the first electrodes of the plurality of first solar cell units are connected to the second electrodes of the adjacent first solar cell units,
The first electrodes of the plurality of second solar cell units are connected to the first electrodes of the adjacent second solar cell units,
And the second electrodes of the plurality of second solar cell units are connected to the second electrodes of the adjacent second solar cell units.

9. The method of claim 8,
Wherein the second electrodes of the plurality of first solar cell units extend to the first electrodes of the first solar cell units overlapping with the light emitting layer and connected to each other.

The method of claim 1,
The display unit
The first substrate,
A pixel electrode disposed on the first substrate,
A pixel defining layer located above the pixel electrode and having an opening overlapping with the pixel electrode,
A light-emitting layer located in the opening of the pixel defining layer, and
And a common electrode disposed on the light emitting layer,
The plurality of first solar cell portions and the plurality of second solar cell portions overlap the pixel defining layer,
The plurality of first solar cell portions and the plurality of second solar cell portions
A second substrate,
First electrodes disposed between the first substrate and the second substrate,
Second electrodes overlapping the first electrodes, and
And a photoactive layer disposed between the first electrodes and the second electrodes,
Wherein the first electrodes of the plurality of first solar cell units are connected to the second electrodes of the adjacent first solar cell units,
The first electrodes of the plurality of second solar cell units are connected to the first electrodes of the adjacent second solar cell units,
And the second electrodes of the plurality of second solar cell units are connected to the second electrodes of the adjacent second solar cell units.

11. The method of claim 10,
Wherein the second electrodes of the plurality of first solar cell units extend to the first electrodes of the first solar cell units overlapping with the light emitting layer and connected to each other.