TWI570479B - A color filter with coated solar cell and a method of manufacturing the same - Google Patents

Description

Coated solar cell color filter and preparation method thereof

The present invention relates to a color filter, and more particularly to a coated solar cell color filter and a method for fabricating the same.

Referring to Figure 1, there is a conventional color filter. The color filter comprises a glass substrate 11, a plurality of color blocks 12 respectively disposed on the glass substrate 11 at intervals, and a black matrix 13 (Black Ma-trix, BM) disposed between the color blocks 12. And a protective layer 14 (Overcoat, OC) disposed on the color block 12 and the black matrix 13, and a transparent conductive film 15 (ITO) disposed on the protective layer 14. Such color filters are widely used in liquid crystal display panels, and the color patches 12 included therein enable the liquid crystal display to display images having multiple colors. The effect of the black matrix 13 is to block the light, and to avoid the color light between the color blocks 12 from affecting each other and reducing the contrast of the screen.

It is considered that the light absorbed by the black matrix 13 is wasted, and the latecomer has replaced the black matrix 13 with a solar cell, even if the black matrix 13 has the structure of a solar cell, and uses the light that should be absorbed and shielded to generate electricity. To achieve energy saving effects. At present, a conventional method is to add a sputtering process to a color filter to provide a solar cell on a glass substrate. Taking a thin film solar cell as an example, a transparent conductive film is first plated, and then a p-i-n three-layer Si film is sequentially plated, and then metal is plated, and the light is irradiated by the glass substrate. There are two disadvantages of this method. One is that the sputtering process cannot be well combined with the coating process of the existing color filter, and it is necessary to switch between the two processes in the manufacturing process, which is quite time consuming and costly. In addition, the vacuum environment required for sputtering itself, as well as batch processing, is also a relatively costly process.

The purpose of the present invention is to provide a coated solar cell color filter which can be produced at a relatively low cost.

The coated solar cell color filter comprises a substrate, a color layer, a light shielding matrix, and a protective layer.

The substrate includes a first side and a second side opposite the first side. The color layer includes a plurality of color patches disposed on the first surface spaced apart from each other. The patches cooperate to define a plurality of gaps. The shading matrix is disposed on the second surface, A coated solar cell, and the position corresponds to the gaps. The protective layer is disposed on the color layer.

The utility model has the advantages that the light-shielding matrix adopts a coated solar cell, and can be well integrated with the existing coating process of the color filter, and the coating method is a continuous processing mode, which is compared with the batch processing. The sputtering process can produce higher yields at the same time. In addition, the coating process does not require a vacuum, which is a low-cost process compared to the sputtering process.

The coated solar cell preferably uses an organic thin film solar cell. Since the main light-absorbing power generation material of the organic thin film solar cell is a conductive polymer, it can be dissolved in an organic solvent and then treated by a coating process.

The coated solar cell color filter of the present invention can be applied to an electronic product. Since the electronic product mainly emits visible light visible to the naked eye, the organic thin film solar cell used in the present case should preferably absorb light in the visible range. . In this case, an interactive stacked layer structure comprising different materials is further utilized to achieve the purpose of effectively absorbing visible light range. One is to use P3HT mixed with PCBM, this combination can absorb light with a wavelength of 300nm to 600nm. The second is to mix PTB7 with PCBM, which can absorb light with a wavelength of 500nm to 750nm. The interactive stacked layer structure can effectively absorb light from 300 nm to 750 nm, and can fully utilize the light in the visible light spectrum.

The P3HT refers to poly(3-hexylthiophene). The PCBM refers to [6.6]-phenyl-C ₆₁ / ₇₁ -methyl butyrate ([6,6]-phenyl -C ₆₁ / ₇₁ -butyric acid methyl ester). When the number of carbon atoms is 61, the PCBM is expressed as PC ₆₁ BM; and when the number of carbon atoms is 71, the PCBM is expressed as PC ₇₁ BM. The PTB7, or "Polybenzodithiophene-thienothiophene", refers to Poly{4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4, 5-b']dithio-phene-2,6-diyl-alt-3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophene-4,6-diyl}. P3HT and PTB7 respectively play the role of an electron donor, and the PC _61/71 BM plays the role of an electron acceptor.

The creator of the case, when attempting to replace the conventional shading matrix with a coated solar cell, found that if the coated solar cell is placed on the same side as the color patches, problems affecting the color patches may occur. Therefore, in the present case, an innovative design completely different from the current process is adopted, and the shading matrix and the color blocks are respectively disposed on opposite sides of the substrate, and the problem affecting the color patches can be solved, so that the colors are The block can adopt the same formula and method as before. In addition, because the shading matrix and the color blocks are located on opposite sides of each other, no additional protective measures are taken to avoid mutual influence, so that the utility model has the advantages of simplifying the production process and increasing the yield.

The utility of the coated solar cell color filter is that the shading matrix adopts a coated solar cell, so that the coating can be partially changed into a coating process to greatly reduce the production cost. In addition, the shading matrix is disposed opposite to the color patches It also reduces the impact on these patches and simplifies the production process and increases throughput.

The second object of the present invention is to provide a method for manufacturing a coated solar cell color filter, which can produce a power-saving color filter at a low cost.

The method for preparing the coated solar cell color filter comprises: step A: providing a substrate. The substrate has a first side and a second side opposite the first side. Step B: A plurality of color blocks spaced apart from each other are disposed on the first surface, and the color blocks cooperate to define a plurality of gaps. Step C: The coated solar cell is disposed in a coating manner at a position corresponding to the gap of the second surface, and a light shielding matrix is formed. Step D: A protective layer is disposed on the color blocks.

The method for producing the coated solar cell color filter is that it can be manufactured by a coating process, so that a color-saving color filter can be produced at a lower cost.

2‧‧‧Substrate

21‧‧‧ first side

22‧‧‧ second side

23‧‧‧ Graphical Circuit

3‧‧‧Color layer

31‧‧‧ color blocks

32‧‧‧ gap

4‧‧‧ shading matrix

41‧‧‧First electrode unit

411‧‧‧First electrode layer

412‧‧‧Electronic transport layer

42‧‧‧Active unit

421‧‧‧First active layer

422‧‧‧Second active layer

43‧‧‧Second electrode unit

431‧‧‧ hole transport layer

432‧‧‧Second electrode layer

5‧‧‧Protective layer

71‧‧‧Provide substrate steps

72‧‧‧ Provide color layer steps

73‧‧‧ Provide a shading matrix step

74‧‧‧Packaging steps

Other features and effects of the present invention will be clearly shown in the embodiments with reference to the drawings, wherein: FIG. 1 is a schematic view of a conventional color filter; FIG. 2 is a coated solar cell color filter of the present invention. And a schematic view of a finished product of an embodiment of the method; FIG. 3 is a front view of the finished product; 4 is a back view of the finished product; FIG. 5 is an experimental data diagram of a light absorbing effect of the light absorbing material used in the embodiment; FIG. 6 is a flow chart of a manufacturing method of the embodiment; A schematic flow chart of the manufacturing method of this embodiment.

Referring to FIG. 2, FIG. 3 and FIG. 4, the coated solar cell color filter and the finished product of the method for manufacturing the same are: a coated solar cell color filter comprising a substrate 2 and a layer disposed on the substrate The color layer 3 on the second layer, the light shielding matrix 4 on the opposite side of the substrate 2 and the color layer 3 are respectively disposed on the opposite side of the substrate 2, and a protective layer 5 disposed on the color layer 3. Before proceeding with the description, the reader should note that the drawings are only schematic and the thickness between layers does not represent the thickness of the actual finished product.

The substrate 2 is made of polyethylene terephthalate (PET) and includes a first face 21 and a second face 22 opposite the first face 21. The second face 22 has a patterning circuit 23 pre-etched from an indium tin oxide (ITO) film.

The color layer 3 includes a plurality of color patches 31 spaced apart from each other on the first surface 21. The color blocks 31 have different colors of red, green and blue, respectively, and can filter out light of different colors. The patches 31 cooperate to define a plurality of gaps 32. The materials used for the color blocks 31 are conventional techniques, and thus the description thereof will be omitted.

The shading matrix 4 is disposed on the second surface 22 as a coated solar cell and has a position corresponding to the gaps 32. The coated solar cell is an organic thin film solar cell, but it can also be a solar cell that can be manufactured by a coating method. The light shielding matrix 4 includes a first electrode unit 41 disposed on the second surface 22, an active unit 42 disposed on the first electrode unit 41, and a second electrode disposed on the active unit Unit 43.

The first electrode unit 41 includes a first electrode layer 411 composed of the patterning circuit 23 of the second surface 22, and an electron transport layer 412 disposed between the first electrode layer 411 and the active unit 42. In the implementation, if the substrate 2 not provided with the patterning circuit 23 is purchased, the first electrode layer 411 made of indium tin oxide can be provided on the substrate 2 by itself. The electron transport layer 412 is a wide bandgap material including a metal composition and a polymer material. The metal composition can be selected from zinc acetate, aluminum acetate, and any combination of the foregoing. The polymer material can be selected from the group consisting of polyethylenimine (PEI), polyvinylpyrrol-idone (PVP), polyethylenimine ethoxylated (PEIE), and any combination of the foregoing materials. . In this embodiment, the metal composition is zinc acetate and aluminum acetate. The polymer material is PEIE.

The active unit 42 includes a first active layer 421 on a layer of electron transport layer 412 and a second active layer 422 disposed on the first active layer 421. The first active layer 421 includes PC ₇₁ BM and P3HT. The second active layer 422 includes a PTB 7 and a PC ₇₁ BM. It should be noted that only one of the first active layer 421 and the second active layer 422 can be disposed in the implementation. This embodiment only provides an embodiment with a wide absorption range.

The second electrode unit 43 includes a hole transport layer 431 disposed on the active unit 42 and a second electrode layer 432 disposed on the hole transport layer 431. The hole transport layer 431 is located on the second active layer 422 and is molybdenum oxide (MoO ₃ ). The second electrode layer 432 is silver (Ag).

2 and FIG. 5 are experimental data diagrams of light absorption effects of materials used by the first active layer 421 and the second active layer 422 of the active unit 42. It can be seen from Fig. 5 that the main absorption wavelength of PTB7 is from 500 nm to 750 nm, and generally the absorption wavelength of P3HT is from 300 nm to 600 nm. Therefore, the PC ₇₁ BM and P3HT used in the first active layer 421 of the present invention can absorb light having a wavelength of about 300 nm to 600 nm, and the PBT7 and PC ₇₁ BM used in the second active layer 422 of the present invention can absorb a wavelength of about 500 nm. 750nm light. The active unit 42 has an absorption wavelength that truly covers 300 nm to 750 nm. In addition to a wide range of coverage and efficient power generation, the active unit 42 can also preferably meet the requirements of the shading matrix 4 for shielding visible light.

Although the protective layer 5 is provided in the embodiment of the present invention, the protective layer 5 can be omitted in practice. The shading matrix 4 of the present invention is disposed on the opposite side of the color layer 3 without any doubt that the color layer 3 is affected. Naturally, the arrangement for protecting the color layer 3 may be omitted. Protective layer 5, which is also one of the effects brought about by the innovative structure of the case.

In summary, the effect of the coated solar cell color filter of the present invention is that the shading matrix 4 is a coated solar cell, so that the coating can be partially produced by a coating process, which greatly reduces the production cost and achieves the present case. purpose. In addition, the shading matrix 4 is disposed on the opposite side of the color patches 31, and can also reduce the influence on the color patches 31, and simplify the production process and increase the yield.

Referring to FIG. 2, FIG. 6 and FIG. 7, the coated solar cell color filter can be produced by a method comprising the steps of: providing a substrate step 71, a step of providing a color layer 72, and a step of providing a light shielding matrix 73. And a packaging step 74. Before starting the process, the solution prepared in advance for coating in this case will be explained.

"First active layer coating solution and second active layer coating solution"

The first active layer coating solution, o-xylene (o -xylene) as a solvent, a solution of P3HT and PC ₇₁ BM. The second active layer coating solution is dissolved in PTB7 and PC ₇₁ BM using o-xylene as a solvent. The P3HT was purchased from Rieke Met-als, the PC ₇₁ BM was purchased from Rieke Metals, and the PTB7 was purchased from One Material. The concentration of each material used in the technical field of the present invention can be controlled according to the general knowledge and common skills of the present invention. It is not specifically described and limited here. For related content, please refer to Taiwan Public Application No. 201517340. The content.

"Electron transport layer coating solution"

Take 1g of zinc acetate, 0.015g of aluminum acetate, and 0.06g of Zonyl FS-300 (surfactant) was dissolved in 10 g of deionized water (DIW) to prepare an aluminum doped Zinc oxide (AZO) solution. Dilute with an equal volume of deionized water of the AZO solution to obtain a diluted AZO solution. The ethoxylated polyethyleneimine (PEIE) solution was further diluted to 0.4 wt% with 2-methoxyethanol to become a diluted PEIE solution. Next, the diluted AZO solution and the diluted PEIE solution were mixed in a volume ratio (diluted AZO solution): (diluted PEIE solution) = 1:0.2 to prepare an electron transport layer coating solution. The PEIE solution was purchased from Aldrich.

In the step of providing the substrate 71, a substrate 2 is provided. The substrate 2 has a first surface 21, a second surface 22 opposite to the first surface 21, and a pattern disposed on the second surface 22 and pre-etched by an indium tin oxide (ITO) film. Circuit 23. The material of the substrate 2 was polyethylene terephthalate (PET), which was purchased from Optical Filters Ltd. The substrate 2 can be produced by self-processing in addition to the existing products available on the market, and is not particularly limited. Since the technique of etching the patterning circuit 23 is a conventional technique, the description thereof is omitted here.

The providing color layer step 72 is to set a plurality of color blocks 31 spaced apart from each other and having different red, green and blue colors on the first surface 21. The patches 31 cooperate to define a plurality of gaps 32. Since the technique of providing the color patches 31 in the process of the color filter is an operation of the prior art, the description is omitted here.

The step of the light shielding matrix 4 is that the second surface 22 corresponds to the equal gap 32 The position of the coated solar cell is set by coating and a layer of light shielding matrix 4 is formed. Since the substrate 2 has the patterning circuit 23, the patterning circuit 23 can be directly used as the first electrode layer 411. The prepared electron transport layer coating solution was applied to the first electrode layer 411 by a roll coating method in a roll-to-roll coating machine under an atmosphere to form a layer of the electron transport layer 412. After the coating is completed, drying is performed at 150 ° C for 10 minutes. Next, the first active layer coating solution is applied onto the electron transport layer 412 to form a first active layer 421 by the same machine and coating method, and the second active layer coating solution is applied to the first A second active layer 422 is formed on an active layer 421. After the coating is completed, heat treatment annealing at 130 ° C for 10 minutes may be performed. Then, a layer of hole transport layer 431 is formed on the second active layer 422 by thermal evaporation. Finally, silver is also formed on the hole transport layer 432 by thermal evaporation to form a second electrode layer 431, that is, the arrangement of the light shielding matrix 4 is completed. The slit coating method described above is merely an example, and a method such as spray coating or inkjet coating can be modified in practice. It should be noted that, as the substrate 2 provided in the step of providing the substrate 71 does not have the patterning circuit 23, in this step, the first electrode layer should be disposed before the electron transport layer 412 is coated. 411.

In the encapsulating step 74, a protective layer 5 is disposed on the color blocks 31. Since the technique of providing the protective layer 5 is a conventional technique, the description is omitted here. Since the color layer 3 is not affected when the light shielding matrix 4 is provided, the packaging step 74 can be omitted in practice.

In summary, the method for manufacturing the coated solar cell color polishing sheet of the present invention is that the partial process is changed to the coating process to manufacture, and the power-saving color filter can be produced at a lower cost.

However, the above is only the preferred embodiment of the present case. When it is not possible to limit the scope of the implementation of this case, all the simple equivalent changes and modifications made in accordance with the scope of patent application and the content of the patent specification in this case are still the patents of this case. Within the scope of coverage.

2‧‧‧Substrate

21‧‧‧ first side

22‧‧‧ second side

23‧‧‧ Graphical Circuit

3‧‧‧Color layer

31‧‧‧ color blocks

32‧‧‧ gap

4‧‧‧ shading matrix

41‧‧‧First electrode unit

411‧‧‧First electrode layer

412‧‧‧Electronic transport layer

42‧‧‧Active unit

421‧‧‧First active layer

422‧‧‧Second active layer

43‧‧‧Second electrode unit

431‧‧‧ hole transport layer

432‧‧‧Second electrode layer

5‧‧‧Protective layer

Claims (9)

A coated solar cell color filter comprising: a substrate comprising a first side, and a second side opposite to the first side; a color layer comprising a plurality of spaced apart ones disposed in the first a color block on one side, the color blocks cooperate to define a plurality of gaps; and a light shielding matrix disposed on the second surface, which is a coated solar cell, and the position corresponds to the gaps; The light shielding matrix can absorb light having a wavelength of 300 nm to 750 nm. The coated solar cell color filter of claim 1, wherein the light shielding matrix is an organic thin film solar cell. The coated solar cell color filter of claim 1, wherein the shading matrix comprises a first electrode unit disposed on the second surface, and an active unit disposed on the first electrode unit. And a second electrode unit disposed on the active unit, the active unit including a first active layer and a second active layer stacked on each other, the first active layer including [6.6]-phenyl-C ₆₁ / ₇₁ Methyl butyrate, and poly-3-hexylthiophene, the second active layer comprising [6.6]-phenyl-C61/71-butyric acid methyl ester, and PTB7. The coated solar cell color filter of claim 3, wherein the first electrode unit comprises a first electrode layer disposed on the second surface, and a layer is disposed on the first electrode layer An electron transport layer between the active cells, the first electrode layer is indium tin oxide, and the electron transport layer is wide Energy gap material. The coated solar cell color filter of claim 4, wherein the electron transport layer comprises a metal composition, and a polymer material selected from the group consisting of zinc acetate, aluminum acetate, and the foregoing In any combination of materials, the polymeric material is selected from the group consisting of polyethyleneimine, polyvinylpyrrolidone, ethoxypolyethyleneimine, and any combination of the foregoing. The coated solar cell color filter of claim 3, wherein the second electrode unit comprises a layer of a hole transport layer disposed on the active unit, and a layer disposed on the hole transport layer A two-electrode layer, the hole transport layer is molybdenum oxide, and the second electrode layer is silver. A method for manufacturing a coated solar cell color filter, comprising: step A: providing a substrate having a first surface and a second surface opposite to each other; and step B: setting a plurality of the first surface Color blocks spaced apart from each other, the color blocks cooperate to define a plurality of gaps; and step C: the coated solar cells are disposed in a coating manner at a position corresponding to the gaps of the second surface and form a light shielding matrix. The method for preparing a coated solar cell color filter according to claim 7, wherein the coating method in the step C is spray coating, slit coating, and inkjet coating. The method for preparing a coated solar cell color filter according to claim 7, wherein in the step C, a layer of an electron transport layer is first coated, and then a layer of the first active layer is coated, and then a layer is coated. Two active layers, then coated After laying a layer of hole transport layer, a layer of second electrode layer is finally coated.