KR20100099503A - Display comprising an organic molecule solar cell - Google Patents

Abstract

PURPOSE: A display device in which an organic molecule type solar battery is embedded in order to reduce power consumption applied through the external power supply is provided to reduce power consumption applied through the external power supply and improve usability of the light source. CONSTITUTION: An organic molecule solar battery(4) is embedded in a color filter. The color filter is formed into an RGB and an organic molecule type solar battery pattern. The color filter is formed into the organic molecule type solar battery pattern combining the RGB and a black matrix. The organic molecule type solar battery has a flexible type. The organic molecule type solar battery is formed into a wet deposition process.

Description

DISPLAY COMPRISING AN ORGANIC MOLECULE SOLAR CELL}

The present invention relates to a display device incorporating an organic molecular solar cell that utilizes an organic molecular solar cell to efficiently utilize the light source by converting and storing an electric light source that is transmitted and shielded by a color filter and external light into electrical energy. .

Recently, liquid crystal displays (LCDs), organic electroluminescent displays (OLEDs), electroluminescent displays (LEDs), plasma display panels (PDPs), and field emission displays (FEDs) that can display a variety of expressive colors Display devices are widely used. At this time, a color filter (color filter) is used a lot to display the color while taking advantage of the thin, lightweight, etc. of the flat panel.

The color filter is a filter that selectively transmits light in a specific wavelength region of visible light, and includes three primary color filters of red (R), green (G), and blue (B) according to the principle of photolysis and synthesis, Cyan (C), magenta (M) and yellow (Y) complementary filters are used.

In general, a color display apparatus has a plurality of unit display regions, and a predetermined color filter is superposed on each unit display region to control light emission and light shielding states of each unit display region to display a target color. At this time, in order to sharpen the display image, a method of covering the non-display areas with a black matrix (BM) such as a metal or a light-shielding resin and determining the area of each display area is implemented. In this case, the openings of the black matrix are lighted. It becomes a unit display area | region which is a transmission area | region.

More specifically, the LCD will be described as an example.

A liquid crystal display device interposes a liquid crystal layer between a pair of substrates having electrodes, controls voltages of optical properties of the liquid crystal layer by applying a voltage, and controls light transmittance as a whole by combining polarizers as necessary. When used as a transmission type, a pair of transparent substrates such as glass is used, and when used as a reflection type, one substrate is used as a transparent substrate that passes light.

As the driving method of the display area, a simple matrix method in which a plurality of electrodes (common electrode, segment electrode) intersecting each other on a pair of opposing substrates is provided, or a front electrode (common electrode) is provided on one substrate and the other The active matrix system is known in which a pixel electrode and a switching transistor are provided in each unit display region and the target voltage is accumulated for each pixel on the substrate.

As a switching transistor used to realize an active matrix using a glass substrate, a thin film transistor (TFT) using amorphous silicon (a-Si) or polycrystalline silicon (poly-Si) is used. One current electrode (hereinafter referred to as a 'source electrode') of the TFT is connected to the pixel electrode, and the other current electrode (hereinafter referred to as a 'drain electrode') of the TFT is connected to the data line, and the control electrode (hereinafter referred to as "drain electrode") is connected. , "Gate electrode") is connected to the scanning line. The data line and the scan line cross each other and are disposed on the substrate.

In general, a color display device requires high color reproducibility and light transmittance, and color reproducibility is determined by chromaticity coordinates of each color filter. In the RGB system, the larger the area of the triangle formed by the color patterns of R, G, and B on the chromaticity coordinates, the higher the color reproducibility is. In addition, the light transmittance is determined by the intensity of the emitted light when white light is incident on each color filter and the aperture ratio of the black matrix, and a high light transmittance is desired to obtain a bright color display. In particular, high light transmittance is required in a color LCD or a reflective LCD of a notebook personal computer (PC). In this case, the transmittance of the color filter is improved by increasing the aperture ratio of the black matrix. In order to increase the aperture ratio of the black matrix, it is common to narrow the width of the black matrix between the light transmitting regions, and to reduce the thickness of the color filter or change the material in order to improve the transmittance of the color filter.

In this regard, various techniques have been proposed, and in particular, Japanese Patent Laid-Open No. 1996-94992 proposes to form a solar cell on the pattern of the color filter or to use the solar cell together with the pattern of the color filter. However, this has a problem in that the transmittance required in the color filter cannot be satisfied due to the characteristics of the solar cell. In addition, an amorphous silicon solar cell is used as a solar cell. The amorphous silicon solar cell has an advantage of being thinner than the crystalline silicon solar cell, but has a disadvantage in that the film forming process is complicated and difficult to form and enlarge. In addition, due to the high price of film forming equipment, the manufacturing cost of the display device may be increased, which is a disadvantage of other inorganic thin film solar cells other than amorphous silicon.

Japanese Patent Laid-Open No. 1996-94992 and Korean Patent Laid-Open No. 2008-0061228 propose to form a solar cell on top of a black matrix (BM) or to use the solar cell in combination with a black matrix. However, as described above, PN junction semiconductors such as amorphous silicon solar cells are used as the solar cells, which makes the film forming process complicated, difficult to form and enlarge the film, and increases the manufacturing cost of the display device due to the expensive film forming equipment.

The present invention is economical, stability of use, manufacturing process of conventional crystalline silicon solar cell, amorphous silicon solar cell, inorganic solar cell and dye-sensitized solar cell applied to improve the use efficiency of the light source and external light of the backlight unit used in the color filter To improve the efficiency of energy efficiency and energy conversion.

In addition, the present invention is to provide a display device incorporating an organic-molecule-type solar cell, which is an electronic device using an organic compound that is various, inexpensive and easy to process compared to the prior art.

The present invention is characterized by a display device including a color filter in which an organic molecular solar cell is incorporated. Specifically, the present invention includes a color filter including an organic molecular solar cell together with a pattern of color filters such as red (R), green (G) and blue (B), or a pattern of the color filter, an organic molecular solar cell And a color filter including a black matrix, and converts a light source and external light of a backlight unit into electrical energy and recycles the same.

The display device of the present invention employs an organic-molecule-type solar cell, which is an electronic device using an organic compound, which is diverse, inexpensive, and easy to process, compared to the prior art, and thus economical efficiency and process efficiency of the display device are expected.

In addition, the display device may power the light source and the external light of the backlight unit that is lost by using an organic molecular solar cell, and a portion of the power consumption of the display element may be covered by the electric power stored by the solar cell. Improvement is expected, and the effect of reducing power consumption applied through external power is expected.

The present invention relates to a display device capable of recycling the disappeared light by converting the light source and the external light of the backlight unit which is lost by embedding the organic molecular solar cell into electrical energy. At this time, the display device includes a color filter such as a liquid crystal display (LCD), an organic electroluminescent display (OLED), an electroluminescent display (LED), a plasma display panel (PDP), and a field emission display (FED). It can be used for the applied display device. The organic molecular solar cell of the present invention refers to an organic solar cell excluding a dye-sensitized solar cell among organic solar cells.

The light source of the backlight unit is generally used in the art and is not particularly limited, but specifically, a cold cathode fluorescent lamp (CCFL), a hot cathode fluorescent lamp (HCFL), an external electrode fluorescent lamp (EEFL), a surface light source (FFL), One selected from the group consisting of a composite ceramic light source body (CEFL) and a light emitting diode (LED) may be used. The backlight unit is divided into an edge type and a direct type according to the position of the light source with respect to the display surface, and thus the present invention is not limited by the position of the light source. In addition, the external light generally refers to sunlight incident from the outside to perform photolysis and synthesis of the three primary color patterns of the color filter.

Hereinafter, the display device of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic cross-sectional view of one side of a conventional liquid crystal display. The liquid crystal display of FIG. 1 includes an upper substrate 1, a lower substrate 7, and a liquid crystal layer 5 interposed between the upper substrate 1 and the lower substrate 7, and the upper substrate 1 has a lower portion. The color filter pattern 2 and the black matrix 3 are provided on the opposite surface to the substrate 7. The lower substrate 7 is formed with a thin film transistor (TFT) layer 6 on the opposite surface to the upper substrate 1.

FIG. 2 is a schematic cross-sectional view of one side of a liquid crystal display including red (R), green (G), blue (B), an organic molecular solar cell, and a black matrix according to the present invention. The liquid crystal display of FIG. 2 includes an upper substrate 1, a lower substrate 7, and a liquid crystal layer 5 interposed between the upper substrate 1 and the lower substrate 7. The color filter pattern 2, the black matrix 3, and the organic molecular solar cell 4 are provided on the opposite surface to the lower substrate 7. The lower substrate 7 is formed with a TFT layer 6 on a surface opposite to the upper substrate 1. At this time, the organic molecular solar cell 4 can adjust the transmittance as necessary, and can convert the light source and the external light of the backlight unit into electrical energy, so it is not provided with a transmissive liquid crystal display device having a backlight unit and a backlight unit. It can be applied to both reflective liquid crystal display devices.

3 is a schematic cross-sectional view of one side of a liquid crystal display device in which red (R), green (G), blue (B), and organic molecular solar cells according to the present invention are incorporated. The liquid crystal display of FIG. 3 includes an upper substrate 1, a lower substrate 7, and a liquid crystal layer 5 interposed between the upper substrate 1 and the lower substrate 7. The color filter pattern 2 and the organic molecular solar cell 4 are formed on the surface facing the lower substrate 7. The lower substrate 7 is formed with a TFT layer 6 on a surface opposite to the upper substrate 1. At this time, the organic molecular solar cell 4 also serves as a black matrix, and can adjust the transmittance as necessary. The organic molecular solar cell 4 may convert the light source and the external light of the backlight unit into electrical energy, and thus may be applied to both a transmissive liquid crystal display having a backlight unit and a reflective liquid crystal display having no backlight unit. have.

 4 is a schematic cross-sectional view of one side of a liquid crystal display device having an organic molecular solar cell embedded in an upper portion of red (R), green (G), blue (B) and a black matrix according to the present invention. The liquid crystal display of FIG. 4 includes an upper substrate 1, a lower substrate 7, and a liquid crystal layer 5 interposed between the upper substrate 1 and the lower substrate 7, and the upper substrate 1 has a lower portion. The color filter pattern 2 and the black matrix 3 are formed on the opposite surface to the substrate 7. An organic molecular solar cell 4 is formed on an upper portion of the black matrix 3, and a TFT layer 6 is formed on an opposite surface of the lower substrate 7 to the upper substrate 1. The organic molecular solar cell 4 can adjust the transmittance as needed and can be applied to a reflective liquid crystal display device without a backlight unit because it can convert external light into electrical energy.

FIG. 5 is a schematic cross-sectional view of one side of a liquid crystal display device having an organic molecular solar cell embedded in a lower portion of red (R), green (G), blue (B), and black matrix according to the present invention. The liquid crystal display of FIG. 5 includes an upper substrate 1, a lower substrate 7, and a liquid crystal layer 5 interposed between the upper substrate 1 and the lower substrate 7, and the upper substrate 1 has a lower portion. The color filter pattern 2 and the organic molecular solar cell 4 are formed on the opposite surface to the substrate 7. An organic molecular solar cell 4 is formed at a lower portion of the black matrix 3, and the lower substrate 7 is formed with a TFT layer 6 on a surface opposite to the upper substrate 1. The organic molecular solar cell 4 can adjust the transmittance as necessary, and can be applied to a transmissive liquid crystal display device having a backlight unit because it can convert the backlight light source into electrical energy.

6 is a liquid crystal display device in which an organic molecular solar cell is provided at the same position as a black matrix on a substrate opposite to a backlight of red (R), green (G), blue (B), black matrix and color filter according to the present invention. One side of the cross-sectional view schematically. The liquid crystal display of FIG. 6 includes an upper substrate 1, a lower substrate 7, and a liquid crystal layer 5 interposed between the upper substrate 1 and the lower substrate 7, and the upper substrate 1 has a lower portion. The color filter pattern 2 and the black matrix 3 are formed on the opposite surface to the substrate 7. The organic matrix solar cell 4 is formed at a position corresponding to the rear surface of the black matrix 3, and the lower substrate 7 is formed with a TFT layer 6 on a surface opposite to the upper substrate 1. have. The organic molecular solar cell 4 can adjust the transmittance as needed and can be applied to a reflective liquid crystal display device without a backlight unit because it can convert external light into electrical energy.

On the other hand, the organic molecular solar cell embedded in the display device of the present invention is generally used in the art, the basic structure is a metal / organic conductor (photoactive layer) / metal structure of a transparent electrode having a high work function as an anode, A metal having a low work function is used as the cathode. In this case, both the upper and lower electrodes may be transparent electrodes, or the upper or lower electrodes may be reflective electrodes. When the reflective electrode is built, the reflective plate may reflect the light leaked from the light source of the backlight unit.

The photoactive layer may use a multi-layer structure in which donors (electron donor material, donor) and acceptor (electron acceptor material, acceptor) are stacked, or a single layer (bulk-heterojunction) structure in which they are mixed, and in some cases, a donor layer It is possible to use a mixed structure in which a bulk-heterojunction structure in which a donor-receptor is mixed between and a receptor layer is sandwiched. In addition, a hole transport layer may be interposed between the anode electrode and the photoactive layer as a buffer layer, and an electron transport layer may be interposed between the cathode and the photoactive layer. In this case, the material used as the photoactive layer should be excellent in electrical properties such as charge mobility if the light absorption wavelength range should be well suited to the solar spectrum and have a very strong light absorption. Receptors must meet the prerequisite of having a higher electron affinity compared to the donor, but donor and acceptor material may change in relative terms.

In addition, organic semiconductors used as photoactive layers include organic monomolecules and polymers. In the case of organic monomolecules, there is a method using a vacuum deposition process in which a donor layer and a acceptor layer are formed continuously or simultaneously by heating in a vacuum. In this case, the solution in which the donor and acceptor are dissolved together is spin coated, ink-jet coated, screen printing, doctor blade, slit coating, The film is formed using a wet process such as flow coating, roll-to-roll coating, or the like. Recently, the mixed structure layer is arranged in a so-called tandem structure of two upper and lower layers to form a film.

Such organic molecular solar cells are red (R), green (G), blue (B) together with the pattern of the color filter including the organic molecular solar cell, or red (R), green (G), blue (B) ), Embedded in a pattern of a color filter including an organic molecular solar cell and a black matrix.

The display device according to the present invention is used by a built-in driving unit, which is a power supply, which is generally used in the art and is not particularly limited. The driving unit may be used when the power source obtained from the organic molecular solar cell is applied to the display device or when the power source obtained from the organic molecular solar cell is stored. In this case, the organic molecular solar cell covers a part of the total power consumption. It can also serve as an auxiliary power supply.

Hereinafter, the organic molecular solar cell of the present invention will be described in detail with reference to the following drawings.

7 is a schematic cross-sectional view of one side of a transmissive organic molecular solar cell according to the present invention. As shown in FIG. 7A, external light is incident through the transparent first electrode 8 to be transmitted to the organic molecular solar cell layer 9, or a backlight light source is incident through the transmissive second electrode 10 to form an organic component. The solar cell layer 9 is transferred to the magnetic solar cell layer 9 and converted into electrical energy. Alternatively, the stacked structure may be opposed as shown in FIG. 7B.

In this case, the first electrode 9 may include metal oxides such as transparent indium tin oxide (ITO), indium zinc oxide (IZO), fluorine-containing tin oxide (FTO), tin oxide, zinc oxide, and zinc aluminum oxide; Metal nitrides such as titanium nitride; Conductive polymers such as polyaniline, polythiopine, polypyrrole, polyphenylenevinylene, poly (3-methylthiopine), and polyphenylene sulfide can be used. As the second electrode 11, a metal such as gold, platinum, silver, copper, aluminum, nickel, cobalt, lead, molybdenum, tungsten, tantalum, niobium, or an alloy of these metals may be used. The thickness of the first electrode and the second electrode is maintained in the range of 10 to 500nm, respectively.

 A material capable of low temperature deposition is used on the first and second electrodes for electrode connection. Specifically, transparent electrodes such as indium tin oxide (ITO) and indium zinc oxide (IZO) are used. At this time, the thickness of the metal for electrode connection to be deposited is maintained in the range of 10 to 500nm.

8 is a schematic cross-sectional view of one side of a non-transmissive organic molecular solar cell according to the present invention. The light source and the external light of the backlight unit incident through the transparent first electrode 8 are transferred to the organic molecular solar cell layer 9 and converted into electrical energy. On the other hand, the light source is not transmitted to the rear surface of the second electrode 11 through the non-transmissive type and is reflected and recycled as the light source of the organic molecular solar cell layer 9. The first electrode 8 and the non-transmissive second electrode 11 are the same as those of FIG. 7.

In order to describe the organic molecular solar cell layer 9 in detail, a cross section of one side of the organic molecular solar cell device is schematically illustrated in FIGS. 9 and 10.

FIG. 9 illustrates an organic molecular type in which a donor 12 is formed on a first electrode 8, a receptor 13 is stacked on the donor 12, and a second electrode 10, 11 is formed. 10 is a schematic diagram of a solar cell device. FIG. 10 illustrates an organic molecular solar cell in which a donor 12 and a receptor 13 are simultaneously mixed on a first electrode 8, and then second electrodes 10 and 11 are formed. The battery device is illustrated.

9 and 10, if necessary, the hole transport material and the hole injection material (hole transport layer) are disposed between the first electrode 8 and the organic molecular solar cell layer 9. An electron transfer material and an electron injection material (electron transport layer) may be further formed between the second electrodes 10 and 11.

The donor may be a polymer or a small molecule donor generally used in the art. The polymer donor may be poly (3-hexylthiophene-2,5-diyl) (compound 1), poly [3- (potassium-6-hexanoate) thiophene-2,5-diyl] (compound 2) , Poly (thiophen-2-5-diyl) (compound 3), poly (3-octylthiophene-2,5-diyl) (compound 4), poly [1-methoxy-4- (2- Ethylhexyloxy-2,5-phenylenevinylene)] (compound 5), poly [2-methoxy-5- (3,7-dimethyloctyloxy) -1,4-phenylenevinylene] ( Compound 6), poly (9,9-dioctylfluorenyl-2,7-diyl) (Compound 7) and poly (9,9-dioctylfluorenyl-2,7-diyl) (Compound 8 ) May be used. Small molecule donors include pentacene (compound 9), zinc phthalocyanine (compound 10), kappa phthalocyanine (compound 11), titanium oxide phthalocyanine (compound 12) and 3- (2-benzothiazolyl) -7- (diethylamino) coumarin (Compound 13) and the like can be used.

The receptor may be a polymer or a small molecule receptor generally used in the art. As the polymer acceptor, poly [2,5-dihexyloxy-1,4- (1-cyanovinylene) phenylene] (compound 14) and the like can be used. Small molecule receptors are fullerene-C60 (compound 15), (6,6) -phenyl-C61-butylic acid methyl ester (compound 16), [6,6] -phenyl-C71-butylic acid methyl ester ( Compound 17), N, N'-bis (2,5-di-tert-butylphenyl) -3,4,9,10-perylene-dicarboxyimide (Compound 18), N, N'-bis (phenyl ) -3,4,9,10-perylene-dicarboxyimide (Compound 19), anthra [2 ", 1", 9 "; 4,5,6,6", 5 ", 10"; 4 ', 5'6 '] diisoquino [2,1-a; 2', 1'-a '] diperylimidine-12,25-dione (compound 20), perylene-3,4-9-, 10-tetracarboxylic dione hydride (compound 21), perylene-3,4-9,10-tetracarboxydiimide (compound 22), 1,4,5,8-naphthalenetetracarboxylic diionhydride (compound 23), perylene-3,4,9,10-tetracarboxylic acid N, N'-dimethylimide (compound 24) and perylene-3,4,9,10-tetracarboxylic acid N , N'-diheptylimide (compound 25) and the like can be used.

It will be apparent to those skilled in the art that various donations and modifications can be made within the scope and spirit of the present invention, and the donors and receptors presented above are merely illustrative, and such variations and modifications are within the scope of the appended claims.

The invention can be better understood by the following examples, which are intended to illustrate the invention and are not intended to limit the scope of protection as defined by the appended claims.

Example 1 Fabrication and Evaluation of a Wet Process Organic Molecular Solar Cell Device

A glass substrate with an ITO transparent electrode having a size of 25 mm x 25 mm x 1.1 mm was subjected to ultrasonic cleaning in isopropyl alcohol for 5 minutes, followed by ultraviolet ozone cleaning for 30 minutes. The glass substrate with a transparent electrode after cleaning is mounted on a holder of a spin coater, and the polyelectrode (3,4-ethylenediox), which is a hole injection material and a hole transfer material, is first covered by covering the transparent electrode on the surface of the side on which the transparent electrode is formed. Citiopen): Poly (styrenesulfonide) (PEDOT: PSS, Baytron P) was filtered with a 0.45 μm syringe filter and spin-coated at 1,000 rpm to form a 40 nm thick layer. The board | substrate with which PEDOT was formed was baked at 150 degreeC for 10 minutes. The P3HT (Compound 1) and the PCBM (Compound 16) dissolved in chlorobenzene in a ratio of 1: 0.8 on a PEDOT film-forming substrate were spin-coated at 1,000 rpm to form a film having a thickness of 100 nm. The substrate was then mounted in a holder of a vacuum deposition equipment and Al was deposited to a thickness of 100 nm. After Al deposition, the substrate was annealed at 160 ° C. for 10 minutes to fabricate an organic molecular solar cell device. At this time, MIKASA spin coater (1H-DX2) was used for spin coating and VTSEL1000 deposition equipment was used for Al deposition. The efficiency of the organic molecular solar cell was measured using Newport's solar simulater (Class A ASTM E 927-05).

Example 2 Fabrication and Evaluation of Deposition Process Organic Molecular Solar Cell Device

A glass substrate with an ITO transparent electrode having a size of 25 mm x 5 mm x 1.1 mm was subjected to ultrasonic cleaning in isopropyl alcohol for 5 minutes, followed by UV ozone cleaning for 30 minutes. The glass substrate with a transparent electrode after cleaning was mounted on the substrate holder of the vacuum deposition apparatus, and first, the transparent electrode was covered on the surface of the side on which the transparent electrode was formed so that CuPc (compound 11) as a hole transporting and injection material was 20 nm thick. Was deposited. CuPc (Compound 11) and C60 (Compound 15) were co-deposited at a ratio of 1: 1 to form a film with a thickness of 40 nm. Then, the following 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP) was deposited as an electron transfer material at a thickness of 10 nm. An Li film was formed thereon at a film formation rate of 0.1 kPa / sec and a film thickness of 1 nm, and Al was deposited on the Li film to form an electrode having a film thickness of 100 nm to fabricate an organic molecular solar cell device. At the time of deposition, VTSEL's deposition equipment (VTSEL1000) was used. The efficiency of the organic molecular solar cell was measured using Newport's solar simulater (Class A ASTM E 927-05).

Experimental Example

By applying the organic molecular solar cells prepared in Examples 1 and 2 as shown in Figure 2 the upper substrate 1, red (R), green (G), blue (B) color filter pattern (2), oil A display device including a color filter including a mood-shaped solar cell 4 and a black matrix 3, a liquid crystal layer 5, a TFT layer 6, and a lower substrate 7 was laminated in this order.

The display device employing the organic molecular solar cells of Examples 1 and 2 according to the present invention has a high productivity since the solar cell can be large-scaled by performing a solution process, and the thickness of the entire device is only a few hundred nm and is flexible. (flexible) it was possible to manufacture. That is, since the organic molecular solar cell has little limitation in thickness, the thinning effect is excellent as compared with the display device using inorganic solar cells such as crystalline silicon solar cells and amorphous silicon solar cells.

In addition, it was confirmed that the conversion efficiency of the organic molecular solar cell of the present invention to the backlight electrical energy or the utilization efficiency of the light source due to reflection show an effect equal to or higher than the conventional one.

1 shows an example of a liquid crystal display device according to the prior art,

2 shows an example of a liquid crystal display device in which red (R), green (G), blue (B), organic molecular solar cells and a black matrix are embedded.

3 illustrates an example of a liquid crystal display device in which red (R), green (G), blue (B), and organic molecular solar cells are incorporated.

FIG. 4 shows an example of a liquid crystal display device in which an organic molecular solar cell is embedded in red (R), green (G), blue (B), and black matrix upper portions.

FIG. 5 illustrates an example of a liquid crystal display device in which an organic molecular solar cell is embedded in a lower portion of red (R), green (G), blue (B), and black matrix.

FIG. 6 shows an example of a liquid crystal display device in which an organic molecular solar cell is provided at the same position as a black matrix on a substrate opposite to a backlight of red (R), green (G), blue (B), black matrix, and color filter. Will,

7 shows an example of a transmissive organic molecular solar cell,

8 shows an example of a non-transmissive organic molecular solar cell,

Figure 9 shows an example of a donor, acceptor stacked organic molecular solar cell,

10 shows an example of a donor, acceptor mixed organic molecular solar cell,

11 illustrates an example in which red (R), green (G), blue (B), and organic molecular solar cells patterns are formed on a color filter.

<Brief description of symbols for the main parts of the drawings>

1: upper substrate 2: color filter pattern 3: black matrix

4: solar cell 5: liquid crystal layer 6: TFT layer

7: lower substrate 8: first electrode 9: organic molecular solar cell layer

10: transmission second electrode 11: non-transmissive second electrode 12: donor

13: receptor

Claims (19)

A display device comprising a color filter containing an organic molecular solar cell. The display device of claim 1, wherein the color filter is formed of a red (R), green (G), blue (B), and organic molecular solar cell pattern. The display device of claim 1, wherein the color filter is formed of an organic molecular solar cell pattern which also serves as red (R), green (G), blue (B), and black matrix. The display device of claim 1, wherein the color filter is formed in a pattern in which organic molecular solar cells are embedded on the red, green, blue, and black matrices. The display device of claim 1, wherein the color filter is formed in a pattern in which organic molecular solar cells are embedded under the red (R), green (G), blue (B), and black matrices. The display device of claim 1, wherein the color filter comprises red, green, blue, and black matrices formed in a pattern in which organic molecular solar cells are embedded at the same positions as the black matrix. The display device of claim 1, wherein the display device is a transmissive or reflective type. The display device of claim 1, wherein the organic solar cell is in a flexible form. The display device of claim 1, wherein the organic molecular solar cell is formed by a wet or vacuum deposition process. The display device of claim 9, wherein the wet process is selected from the group consisting of a spin coating method, an ink-jet coating method, a screen printing method, a doctor blade method, a slit coating method, a flow coating method, and a roll-to-roll coating method. The display device of claim 1, wherein the upper and lower electrodes of the organic molecular solar cell are transparent electrodes. The display device of claim 1, wherein the upper or lower electrode of the organic molecular solar cell is a reflective electrode. The display device of claim 1, wherein the organic molecular solar cell has a composite layer structure in which donors and acceptors are stacked, respectively. The display device of claim 1, wherein the organic molecular solar cell has a single layer structure in which a donor and a receptor are mixed. The display device of claim 1, wherein the organic molecular solar cell has a structure in which a composite layer in which donors and acceptors are stacked, and a single layer in which donors and acceptors are mixed are mixed. The display device of claim 1, further comprising a driving unit. The display device of claim 16, wherein the driving unit is configured to apply a power source obtained from the organic molecular solar cell to the display device. The display device of claim 16, wherein the driving unit stores power from an organic molecular solar cell. The display device of claim 1, wherein the organic molecular solar cell is an auxiliary power supply device that covers a part of total power consumption of the display device.

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