WO2018124683A1

WO2018124683A1 - Organic solar cell module and building-integrated photovoltaic module having same

Info

Publication number: WO2018124683A1
Application number: PCT/KR2017/015448
Authority: WO
Inventors: 갈진하; 문정열; 서정은; 김광수
Original assignee: 코오롱인더스트리 주식회사
Priority date: 2016-12-28
Filing date: 2017-12-26
Publication date: 2018-07-05

Abstract

The present invention relates to: an organic solar cell module having a reflecting unit-integrated structure, capable of simultaneously improving visibility and photovoltaic efficiency; and a BIPV module having the same.

Description

Organic solar cell module and building integrated solar power module having same

The present invention relates to an organic solar cell module having a reflector integrated structure and a building integrated photovoltaic module having the same.

A solar cell is a photovoltaic cell manufactured for converting solar energy into electrical energy, and refers to a semiconductor device that converts light energy generated from the sun into electrical energy. Such solar cells are expected to be an energy source that can solve future energy problems due to their low pollution, infinite resources and a semi-permanent lifetime. Recently, the research on solar cell technology is being carried out at the same time research on low-cost solar cells to lower the cost of power generation and high-efficiency solar cells to increase the conversion efficiency.

One field to apply solar cells is a building integrated photovoltaic system (hereinafter referred to as a 'BIPV system'). The BIPV system is designed as a part of the building from the early stage of the building plan using the BIPV module and integrated into the building.

The BIPV module can be used as a building exterior material to reduce the corresponding cost, and because it is well coordinated with the building, it has the advantage of improving the added value of the building.

Currently constructed BIPV includes a plurality of PV modules constituting a PV array, which is electrically connected to each of the solar panels and produced in the solar panel. It includes a junction box that serves to provide electricity to an inverter or a battery.

In such a building integrated photovoltaic power generation system, the solar cell module is integrally installed on a wall or roof of a building or a window such as a window.

Korean Patent Laid-Open Publication No. 2010-0034191 proposes a method of disposing a reflective member between solar cell arrays and mentions that light incident from the outside by the reflective member may be reflected toward the solar cell panel to increase the light collecting efficiency. However, photovoltaic power generation efficiency is inevitably affected by the sun's altitude, and thus it is impossible to secure a desired level of battery efficiency.

In addition, in the case of BIPV installed as a single-piece building such as windows or windows, there is a disadvantage in that when a silicon solar cell is installed as a solar panel, a viewing angle from the inside of the building to the outside can never be secured.

Therefore, in order to apply the BIPV module to a building, it is urgent to secure visibility with high battery efficiency.

[Preceding technical literature]

[Patent Documents]

Republic of Korea Patent Publication No. 2010-0034191 (2010.04.01), solar cell system

In order to solve the above problems, the present invention manufactures a module integrating the reflector and the organic solar cell to increase the amount of light incident to the organic solar cell and ensure visibility, and when applied to the BIPV ensures visibility In addition, it can improve battery efficiency and enhance the aesthetic effect of buildings as BIPV.

Accordingly, an object of the present invention is to provide a reflector integrated organic solar cell module having a novel structure in which the reflector and the glass solar cell unit are integrated.

In addition, another object of the present invention is to provide a BIPV module that can secure visibility and high solar cell efficiency.

In order to achieve the above object, the present invention

Base film;

An organic solar cell unit formed in a stripe pattern shape extending in one direction on the base film; And

It includes a reflector formed in a stripe pattern extending in the same direction in the remaining area in which the organic solar cell unit is not formed on the base film,

The reflector may include at least one reflective layer including a reflective layer capable of reflecting incident light to the organic solar cell part due to a difference in refractive index, and a reflective layer having a refractive pattern formed on a surface thereof to reflect the incident light to the organic solar cell part. It provides an integrated organic solar cell module.

The reflective layer capable of reflecting incident light to the organic solar cell unit due to the refractive index difference may include a single layer or a multilayer film including light reflection or light scattering particles in at least one film;

A multilayer film in which two or more layers of films having different refractive indices are laminated; or

Layers having different refractive indices may be laminated, but may have a feature of being a multilayer film having a film having light reflection or light scattering particles present in any one of these layers.

The light reflection or light scattering particles may have a feature including one or more materials selected from the group consisting of glass, inorganic particles, and organic particles.

The inorganic particles may have at least one member selected from the group consisting of zirconia, titania, ceria, alumina, iron oxide, vanadia, antimony oxide, tin oxide, and alumina / silica.

The organic particles may have a feature including a transparent polymer material.

The refractive pattern of the reflective layer may have a feature of an embossed or intaglio pattern.

The refractive pattern may have a feature of being jagged, multifaceted, pyramidal, conical or semi-rounded.

The reflective layer on which the embossed or negative refraction pattern is formed

A single layer or multilayer film comprising light reflecting or light scattering particles inside one film;

It may have a multi-layer film having a multilayer film having a layer having a different refractive index is laminated, the film having a light reflection or light scattering particles present in any one of these layers;

The base film may have a characteristic of being a transparent polymer material.

The organic solar cell unit may have a feature in which a cathode, a photoactive layer, and an anode are sequentially stacked on the base film.

The reflective layer may have a feature including a transparent polymer material.

In addition, the present invention

As a BIPV module (building integrated photo voltaic) that can form the outer wall of a building,

A transparent substrate extending laterally in the frame and having a protruding structure; And a reflective unit integrated organic solar cell module according to claim 1 mounted on the transparent substrate, wherein the organic solar cell unit and the reflective unit are arranged up and down.

The protruding structure may have a circular or polygonal cross-sectional structure so that the organic solar cell unit and the reflecting unit mounted thereon may be disposed at a predetermined angle.

Reflective unit integrated organic solar cell module according to the present invention can be applied to a variety of fields by manufacturing the reflector and the organic solar cell unit integrally.

The module is attached to a transparent substrate having a protruding structure, which can be applied for a BIPV system system to inject a larger amount of sunlight into the solar cell modules, thereby ensuring further improved photovoltaic power generation efficiency. Can be.

1 is a front view of a reflector integrated organic solar cell module according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.

3 is a cross-sectional view showing the OPV unit

4 is a cross-sectional view showing a reflector

5 is a schematic diagram showing a BIPV module according to an embodiment of the present invention

6 is a transparent substrate perspective view

Figure 7 shows the application of the OPV module

8 shows the attachment to the transparent substrate of the OPV module.

9 is a cross-sectional view showing the optical path of the incident light and reflected light of the BIPV module

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. This embodiment is not intended to be limiting.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

In the drawings, the thickness or size of each member is exaggerated, omitted, or schematically illustrated for convenience and clarity of description. In addition, the size and area of each component does not necessarily reflect the actual size or area.

The present invention proposes a BIPV module having a new structure and an organic solar cell module (hereinafter, referred to as 'OPV module') that can be used therein while improving visibility and improving solar cell efficiency.

반사부 일체형 OPV 모듈 Reflective unit integrated OPV module

1 is a front view of a reflector integrated OPV module 10 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.

Referring to FIG. 1, the reflective unit integrated OPV module 10 according to the present invention has a structure in which the OPV unit 13 and the reflective unit 15 are formed on the same surface on the base film 11. In this case, the OPV unit 13 and the reflector 15 have a stripe pattern structure extending in the same direction.

At this time, the width of the stripe pattern is formed corresponding to the inclined surface length of the projecting structure of the transparent substrate when applied to the BIPV module described later. For convenience, the OPV unit 13 and the reflector 15 are shown to have the same thickness, but the widths of the OPV unit 13 and the reflector 15 may be the same or different. Preferably, the width of the reflector 15 may be thickened to secure visibility, or the width of the OPV 13 may be thickened to increase solar efficiency.

The base film 11 is not particularly limited as long as it has flexibility and transparency, and it is preferable to use a transparent polymer material in the form of a film that is flexible and has high chemical stability, mechanical strength and transparency.

As the transparent polymer material, cycloolefin derivatives having a unit of a monomer containing a cycloolefin such as norbornene or a polycyclic norbornene monomer, cellulose (diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, isobutyl Ester cellulose, propionyl cellulose, butyryl cellulose, acetyl propionyl cellulose), ethylene-vinyl acetate copolymer, polyester, polystyrene, polyamide, polyetherimide, polyacryl, polyimide, polyethersulfone, polysulfone, polyethylene , Polypropylene, polymethylpentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyvinyl acetal, polyether ketone, polyether ether ketone, polyether sulfone, polymethyl methacrylate, polyethylene terephthalate, polybutyl Renterphthalate, Paul May comprise a material on the one selected from the group consisting of ethylene terephthalate, polycarbonate, polyurethane, epoxy or the like. Such a base film 11 can be comprised by a single layer or a multilayer.

In order to ensure visibility, the base film 11 may have a transmittance of at least 70% or more, preferably 80% or more at a visible light wavelength of about 400 to 750 nm.

The thickness of the base film 11 may vary depending on the use of the BIPV module, and is not limited in the present invention and may be manufactured to a thickness of several millimeters at several microns.

The OPV unit 13 constituting the reflective unit integrated OPV module 10 of the present invention is for photovoltaic power generation, and as shown in FIG. 3, the cathode 131 and the photoactive layer 133 on the base film 11. , And anode 135 are sequentially stacked. The structure and each component of the OPV unit 13 is not particularly limited in the present invention, any of those known in the art can be used.

Specifically, since the cathode 131 is a path for light to reach the photoactive layer 133, it is preferable to use a conductive material having high transparency and having a high work function of about 4.5 eV or more and a low resistance.

The cathode 131 may be formed of indium tin oxide (ITO), indium zinc oxide (IZO), fluorine-doped tin oxide (FTO), ZnO-Ga ₂ O ₃ , A metal oxide transparent electrode selected from the group consisting of ZnO-Al ₂ O ₃ , SnO ₂ -Sb ₂ O _3, and a combination thereof; Organic transparent electrodes such as conductive polymers, graphene thin films, graphene oxide thin films, and carbon nanotube thin films; Alternatively, an organic-inorganic bonded transparent electrode such as a carbon nanotube thin film bonded to a metal may be used.

In this case, the thickness of the cathode 131 may be 10 to 3000 nm.

The anode 135 includes silver (Ag), copper (Cu), gold (Au), platinum (Pt), titanium (Ti), aluminum (Al), nickel (Ni), zirconium (Zr), iron (Fe), Metal particles such as manganese (Mn); Or precursors containing the metal elements, for example silver nitrate (AgNO ₃ ), Cu (HAFC) ₂ (Cu (hexafluoroacetylacetonate) _2, ), Cu (HAFC) (1,5-Cyclooctanediene), Cu (HAFC) (1 , 5-Dimethylcyclooctanediene), Cu (HAFC) (4-Methyl-1-pentene), Cu (HAFC) (Vinylcyclohexane), Cu (HAFC) (DMB), Cu (TMHD) ₂ (Cu (tetramethylheptanedionate) ₂ ), DMAH (dimethylaluminum hydride), TMEDA (tetramethylethylenediamine), DMEAA (dimethylethylamine alane, NMe ₂ Et AlH ₃ ), TMA (trimethylaluminum), TEA (triethylaluminum), TBA (triisobutylaluminum), TDMAT (tetra (dimethylamino) titanium), TDEAT (tetra (tetra) dimethylamino) titanium) and the like.

The photoactive layer 133 can use a well-known thing without a restriction. For example, the photoactive layer 133 may have a bulk hetero-junction (BHJ) structure in which an electron acceptor and an electron donor are mixed, or may have a bilayer structure in which they are stacked.

At this time, the electron donor may be used without limitation, known materials such as semiconductor polymer, conjugated polymer, low molecular semiconductor, and the like, for example, PPV (poly (para-phenylene vinylene) -based material, polythiophene) derivative , Phthalocyanine-based materials, etc. In addition, as the electron acceptor, known materials can be used without limitation, and, for example, fullerenes having high electron affinity (C60, C70, C76, C78, C82, C90). , C94, C96, C720, C860, etc.); 1- (3-methoxy-carbonyl) propyl-1-phenyl (6,6) C61 (1- (3-methoxycarbonyl) propyl-1-phenyl (6,6 Fullerene derivatives such as C61: PCBM), C71-PCBM, C84-PCBM, bis-PCBM, ThCBM and the like can be used.

If necessary, a functional layer may be formed between the cathode 131 and the photoactive layer 133, and between the photoactive layer 133 and the anode 135, and the functional layer may be a hole transport layer or an electron transport layer.

As a hole transfer layer (HTL), a known material may be used without limitation, and may be formed using, for example, a material such as MTDATA, TDATA, NPB, PEDOT: PSS, TPD or p-type metal oxide. Can be. The p-type metal oxide may be MoO ₃ or V ₂ O ₅ , for example. In addition, a self-assembled thin film of a metal layer may be used as the hole transport layer. A self-assembled thin film formed by depositing and heat-treating a material such as Ni can be used as a functional layer. In addition, it includes an organic semiconductor such as an electrically conductive polymer or an organic low molecular semiconductor material. The electrically conductive polymer may be at least one selected from the group consisting of polythiophene, polyphenylenevinylene, polyfulorene, polypyrrole, and copolymers thereof. The organic low molecular weight semiconductor material includes at least one selected from the group consisting of pentacene, anthracene, tetratracene, perylene, oligothiophene, and derivatives thereof. can do.

An electron transfer layer (ETL) allows electrons generated in the photoactive layer 133 to be easily transferred to adjacent electrodes. The electron transporting layer may use a known material without limitation, and, for example, aluminum tris (8-hydroxyquinoline), Alq3), lithium fluoride (LiF), lithium complex (8-hydroxy) -quinolinato lithium (Liq), a nonconjugated polymer, a nonconjugated polymer electrolyte, a conjugated polymer electrolyte, or an n-type metal oxide. The n-type metal oxide may be, for example, TiOx, ZnO or Cs ₂ CO ₃ . In addition, a self-assembled thin film of a metal layer may be used as the electron transporting layer.

The OPV unit 13 having the above structure may be configured to electrically connect the positive electrode 135 and the negative electrode 131 which are spaced apart from each other not belonging to the same layer. For example, the small area OPV units 13 may be configured to be electrically connected through a process of forming the micro-area OPV units 13 at micrometer intervals and connecting them in series again.

At this time, the wiring for the electrical connection is not particularly limited in the present invention, a variety of known methods can be used. For example, soldering, welding, a conductive adhesive, an anisotropic conductive film (ACF), and the like are possible. The material used at this time can use metal materials, such as silver and copper.

The wiring may be a wiring terminal of a charging unit connected to a power supply of a charger, or a wiring terminal of a USB charging unit connected to a universal serial bus (USB). Therefore, the organic solar cell encapsulation module of the present invention can be used to charge various electronic devices by connecting the USB connector to the electrode and integrated, and can be used for electronic devices that can be charged with various USB by forming a USB charging unit (Female). .

The reflector 15 is used for the purpose of increasing the solar cell efficiency by the OPV by injecting the reflected light other than the transmitted light while ensuring visibility to the OPV unit 13. The light efficiency of the OPV unit 13 depends on the amount of light of incident sunlight, and the greater the amount of light incident, the higher the photoelectric conversion efficiency of the organic solar cell. Accordingly, in the present invention, the reflective part 15 is formed in a stripe pattern in the same direction as the OPV part 13, which is attached to the transparent substrate to be described below to receive incident light incident on the reflective part 15. It is reflected by the photoactive layer 133 of (13). As a result, the amount of light incident on the photoactive layer 133 increases, and as a result, the photoelectric conversion efficiency produced by the OPV unit 13 may be increased.

The reflector 15 of the present invention may be formed on the base film 11, as shown in Figs.

In the present invention, the reflective layer 151 of the type capable of reflecting incident light by the difference in refractive index may have the structure shown in FIG. 4A.

The reflective layer 151 may be any layer that can be reflected by a difference in refractive index, and the material or shape thereof is not particularly limited in the present invention.

According to the exemplary embodiment of the present invention, the reflective layer 151 may be a film having particles capable of reflecting light or scattering light inside the film.

The film of the reflective layer 151 may be made of a transparent material to ensure visibility, and may include the same or similar material as mentioned in the base film 11.

The particles capable of light reflection or light scattering include one material selected from the group consisting of glass, inorganic particles, and organic particles. The type of the scattering particles Q may be any of the materials listed above as long as the material can reflect the incident light to the OPV unit 13 after scattering the incident light. If necessary, the particles may be selectively used a material capable of reflecting light of a specific wavelength that can specifically increase the photoelectric conversion efficiency of the OPV unit (13).

The inorganic particles may be one selected from the group consisting of zirconia, titania, ceria, alumina, iron oxide, vanadia, antimony oxide, tin oxide and alumina / silica. Such inorganic particles include low refractive particles and high refractive particles, and optionally, the particles may be used alone, or a mixture thereof may be used.

The organic particles may be a transparent polymer material, and include the same or similar materials as mentioned in the base film 11. For example, an acrylic polymer or a silicone polymer such as polymethyl methacrylate may be used.

The particles in the reflective layer 151 may be contained in an amount of 5 to 30% by weight in the total reflective layer 151. If the content is less than the above range, it is difficult to reflect light to the OPV unit 13 at a sufficient level due to the low density of the scattering particles Q. On the contrary, if the content exceeds the above range, uniform dispersion is difficult. .

Such particles preferably have a range in which the median (median) of the particle size distribution has from nanometers to micrometers. If the particle diameter is smaller than this range, it is difficult for the scattering particles to be uniformly dispersed, and if larger than this range, the specific surface area of the light scattering particles becomes small and the scattering becomes difficult.

The reflective layer 151 of the present invention may be formed of a single film including particles, and may be formed of a multilayer film of two or more layers, if necessary. The multilayer film configuration may proceed in a manner to maximize the reflection of the incident light, for example, two or more layers of particles of different materials among glass, inorganic particles, and organic particles, or low refractive layer / high refractive index having low refractive particles It may be configured to have different refractive indices, such as a high refractive index layer having particles, or may be configured with different particle sizes. The construction of such multilayer films can be selected by one of ordinary skill in the art and various modifications and variations are possible.

Meanwhile, according to another embodiment of the present invention, the reflective layer 151 may have a multilayer film in which layers having different refractive indices are stacked to reflect light by the difference in refractive indices.

Layers having different refractive indices may be made of layers of different materials, or layers having a refractive index changed through mechanical processes such as stretching.

In one example, a glass material having a refractive index of 1.5 may be used, and in another layer, a transparent polymer material such as polycarbonate having a refractive index of 1.6 may be used. In this case, if the difference between the refractive indices is too large, the haze of the reflective layer 151 may be increased, and thus the visibility may be lowered. Therefore, the configuration of the layer may be controlled in consideration of the difference in the refractive indices.

In addition, when performing the stretching process has a high refractive index in the uniaxial stretching direction (X direction), which is stretched in the other direction (Y direction) to produce a film having a low refractive index, respectively, when the lamination is specified by the difference in refractive index Optical interference may be made that selectively reflects light of wavelengths.

The multilayer film may have a thickness of several nanometers to several microns, and the total number of layers may have two or more, preferably about 2 to 50.

In addition, according to another embodiment of the present invention, the reflective layer 151 has a multilayer film in which layers having different refractive indices are stacked, but in the form of a multilayer film having light reflection or light scattering particles present in any one of these layers. Can be.

At this time, one film configuration having light reflection or light scattering particles may be a stretched or unstretched film, and is located at the bottom or top of the multilayer film to further increase the reflection and scattering effect of light by the reflective layer 151.

In the present invention, the reflective layer 151 having the refractive pattern formed on the surface to reflect the incident light to the organic solar cell unit includes, for example, the reflective layer 151 having the refractive pattern Q formed on the surface thereof, as shown in FIG. do. Although the refractive pattern Q illustrated in FIG. 4B illustrates a tetrahedron of triangular pyramids for convenience, various forms are possible as described below, but are not limited thereto.

The reflective layer 151 may be made of a transparent material to ensure visibility, and may include the same or similar material as mentioned in the base film 11.

In particular, the reflection from the reflective layer 151 of the present invention to the OPV portion 13 is made through the refractive pattern Q as shown in FIG.

The shape of the refraction pattern Q can be any shape as long as it can reflect incident light after refraction, and can be any shape as long as the shape has irregularities.

For example, the refractive pattern Q according to the present invention has an embossed or engraved pattern, wherein the pattern is jagged, multifaceted, pyramidal, conical or hemispherical. It may have a semi-rounded form, and various forms are possible. Preferably, the refraction pattern Q is preferably a pyramidal shape in the case of an embossed pattern, and a hemispherical shape in the case of a cathode pattern. 5 illustrates an example of the refractive pattern Q of the present invention, and various other forms are possible.

The width, length or depth of the refractive pattern Q may be adjusted in a direction of increasing the reflectance of the incident light, and is not particularly limited in the present invention.

For example, the refractive pattern Q may have a pyramidal shape, and may have a prism structure that may be cross-sectionalized in a triangle when viewed from the top, as shown in FIG. Due to the pyramidal refracting pattern Q, the incident light is refracted at least once inside the refracting pattern and causes total internal reflection to be emitted from the refracting pattern Q in a path different from that of the incident light, Light emitted from the refraction pattern Q enters the OPV unit 13.

Adjustment of the refraction and total internal reflection may be performed by adjusting the shape and size of the refraction pattern Q, that is, length and angle. The parameters are not particularly limited in the present invention, and may be manufactured to a value capable of reflecting the incident light to the OPV unit 13 with the maximum amount of light.

In addition, the refractive pattern Q may be formed over the entire reflecting portion 15 or may be formed only on a portion (eg, the center) of the reflecting portion 15 so as to effectively transmit incident light. In addition, the refractive pattern Q may be formed in a regular pattern, and may be formed in an irregular pattern if necessary.

Another embodiment of the reflective layer of the present invention is a reflective layer on which the embossed or negative refractive pattern is formed,

It may have a multilayer film having a multilayer film having a layer having a different refractive index is laminated, having a film having light reflection or light scattering particles present in any one of these layers.

The above description may be applied as it is to each configuration of the reflective layer of the above form.

The thickness of the reflector 15 including the reflective layer 151 according to the present invention as described above is not particularly limited in the present invention, but is formed to have a thickness substantially similar to or the same as that of the OPV unit 13. However, it is preferable that the reflectance of the OPV unit 13 is 50% or more, preferably 60% or more, while maintaining transparency to ensure visibility.

OPV 모듈 제조 공정OPV module manufacturing process

In the OPV module 10 having the OPV unit 13 and the reflector 15 as described above, the OPV unit 13 and the reflector 15 are the same on the base film 11 as shown in the drawing. Have an integrally formed structure. This integrated structure has a structure different from the structure in which a separate reflector is provided in the OPV unit 13 or a reflector is provided separately from the OPV unit 13.

Manufacturing of the reflector integrated OPV module 10 of the present invention may proceed as follows.

First, either the OPV portion 13 or the reflecting portion 15 is formed in a predetermined region on the base film 11.

Next, the reflector 15 or the OPV unit 13 is formed in a region where the OPV unit 13 or the reflector 15 is not formed.

The order of formation of the OPV 11 and the reflector 15 is not particularly limited in the present invention, and is determined in consideration of process equipment, process efficiency, and the like. For example, it is preferable to form the reflecting portion 15 on the base film 11 and then to form the OPV portion 13.

The formation of the OPV portion 13 is not particularly limited in the present invention, and follows a known manufacturing process of OPV.

For example, forming a cathode 131 on the base film 11; Forming a photoactive layer (133) on the cathode (131); And forming an anode 135 on the photoactive layer 133 to manufacture the OPV unit 13.

The cathode 131 and the anode 135 may be thermal vapor deposition, electron beam deposition, RF or magnetron sputtering, chemical vapor deposition, or similar dry deposition, or may be performed by a wet process such as coating or printing.

The photoactive layer 133 is formed on the cathode 131 by preparing a composition for forming a photoactive layer having the composition described above, and then drying it after wet coating.

The wet coating method is not particularly limited in the present invention, and for example, may be performed by a conventional coating method such as slot die coating, spin coating, gravure coating, spray coating, spin coating, printing, doctor blading, and the like.

After coating of the coating solution, the coated substrate may be subjected to a post treatment step of selectively drying or heat treatment. The drying may be carried out by hot air drying, NIR drying, or UV drying for 50 to 400, preferably 70 to 200 for 1 to 30 minutes. The temperature and time of the post-treatment process may vary depending on the type and physical properties of the substrate.

Prior to the formation of the cathode 131, at least one selected from the group consisting of O ₂ plasma treatment, UV / ozone cleaning, surface cleaning using an acid or alkaline solution, nitrogen plasma treatment and corona discharge cleaning to the substrate film 11 optionally The process of pretreating the surface of the base film 11 can be further performed using either method.

Formation of the reflector 15 is, for example, a film including a reflective layer 151 having light reflection or light scattering particles, a reflective layer 151 having a multilayer film having different refractive indices, or a reflective layer 151 composed of both. Is carried out by the process of coating or laminating to the base film (11).

For example, in the case of the reflective layer 151 having light reflection or light scattering particles, the slurry may be prepared by mixing the transparent polymer and the particles, and then performing wet coating on the base film 11. .

In addition, in the case of a multilayer film, two or more films are drawn, respectively, and then laminated by an adhesive layer to produce a reflective layer 151 having a multilayer film structure, which is then manufactured through a process of laminating it on the base film 11 through an adhesive layer. Is possible.

The adhesive layer to be used is preferably an adhesive material of a transparent material, and may be a solvent adhesive, an emulsion adhesive, a pressure sensitive adhesive, a dehumidifying adhesive, a polycondensation adhesive, a solventless adhesive, a film adhesive, a hot melt adhesive, or the like. Examples thereof include acrylic resins such as polyvinyl alcohol resins and polymethyl methacrylate resins, polystyrene resins, styrene-acrylic copolymer resins, polyethylene resins, epoxy resins, polyurethane resins, silicone resins, polyester resins, and the like.

In addition, for example, the reflective part 15 may be formed by forming the reflective layer 151 on the base film 11 and then forming the refractive pattern Q or the film of the reflective layer 151 having the refractive pattern Q. It is performed by laminating process.

The reflective layer 151 having the refractive pattern Q may be manufactured in various ways, for example, attaching the shape of the refractive pattern Q to the reflective layer 151, or forming the opposite shape of the refractive pattern Q. Imprinting is performed on the reflective layer 151 to form the refractive pattern Q on the reflective layer 151, or the etching pattern Q to form the refractive pattern Q. Such a method is not particularly limited in the present invention, and may be appropriately performed by those skilled in the art.

In this case, the lamination may be performed by applying an adhesive layer (not shown) between the base film 11 and the reflective layer 151 and then drying or applying pressure if necessary.

Through the above-described steps, the OPV unit 13 and the reflecting unit 15 are formed on the base film 11, and then wiring is performed to seal the OPV module.

Wiring may be performed by soldering or the like, through which a plurality of unit modules are electrically connected.

Subsequently, the reflective unit integrated OPV module 10 is sealed to block the external environment including oxygen and moisture. For example, the entire reflector-integrated OPV module 10 is fabricated through a laminating process with a transparent barrier film made of a material such as polyethylene terephthalate (PET).

Then, the module is cut to produce a plurality of unit modules by cutting one by one. The unit module thus cut is applied as a BIPV module attached to a transparent substrate to be described below.

BIPV 모듈BIPV Module

Reflective unit integrated OPV module 10 as described above is applicable to the BIPV module that can form the outer wall of the building.

5 illustrates a BIPV module 100 according to an embodiment of the present invention.

Referring to FIG. 5, in the BIPV module 100 according to the present invention, the reflective unit integrated OPV module 10 is disposed in the frame 300, and the module 10 is stacked on the transparent substrate 200. Has a structure. The BIPV module 100 is manufactured as a unit module, arranged in a plurality of arrays, and used as an exterior wall of a building to configure a BIPV system.

In particular, the BIPV module 100 of the present invention, as shown in FIG. 5, in order to maximize the photoelectric conversion rate due to the reflective unit integrated OPV module 10 formed in a stripe pattern, the OPV unit 13 and the reflector 15 Is preferably inclined, and for this purpose, it is advantageous that the transparent substrate 200 for supporting the reflective unit integrated OPV module 10 has an inclined structure.

Preferably, the transparent substrate 200 proposed in the present invention has a protruding structure in which one side (ie, the outer wall side) arranged in the vertical direction extends in the horizontal direction for use as a wall. The protruding structure may have a circular or polygonal cross-section, for example, a triangular, rectangular, or pentagonal protruding structure. The protruding structure may be any shape as long as the OPV unit 13 and the reflector 15 in the reflective unit integrated OPV module 10 stacked thereon have a predetermined angle to each other.

For example, the protruding structure of the transparent substrate 200 of the present invention may be a protruding structure having a triangular cross section as shown in FIG. 6. In this case, the transparent substrate 200 may have a protrusion structure patterned on a bulk substrate, or two transparent substrates 200 may be connected to each other at a predetermined angle to form a protrusion structure.

The length of the inclined surface of the projecting structure of the transparent substrate 200 is formed to be equal to the width of at least one of the OPV portion 13 or the reflecting portion 15 of the reflective unit integrated OPV module 10, and the length of the other inclined surface is The reflector 15 or the OPV unit 13 may be formed to have the same width so that the OPV unit 13 and the reflector 15 may be bonded to the transparent substrate 200.

For example, as shown in FIG. 6, when the protruding structure of the transparent substrate 200 is a prism structure that can be sectioned into a triangle when viewed from the top, the acute angle of the triangular edge has 20 to 90 degrees, and the reflecting portion The reference numeral 15 reflects the incident light to the OPV section 13 sufficiently to ensure visibility when used as an outer wall. In particular, the cross section of the triangle of the transparent substrate 200 on which the OPV unit 13 is disposed preferably has an angle of 0 to 45 degrees with respect to the horizontal direction of the center point.

The protruding structure may be any shape that corresponds to a structure in which the OPV unit 13 and the reflecting unit 15 may be disposed to form a predetermined angle, in addition to the prism structure. It is possible. According to the change of the protrusion structure, the patterning form of the OPV unit 13 and the reflector 15 may be changed if necessary. For example, in the structure in which the OPV unit 13 and the reflecting unit 15 are repeated with each other as shown in FIG. And vice versa.

The transparent substrate 200 used in the present invention can be used as long as the glass material used as the outer wall of the building or a transparent plastic material that can replace the glass, and is not particularly limited in the present invention.

For example, the transparent substrate 200 may be tempered glass, double-sided tempered glass, semi-reinforced glass, double-sided semi-reinforced glass, laminated glass or multilayer glass. However, to protect the building from natural disasters such as typhoons and earthquakes, it is based on tempered glass having a minimum thickness, for example, 12 mm, so that it can be safely held by external impact.

In addition, the transparent plastic material may be a material having both transparency due to visibility and strength (impact resistance, hardness, durability, etc.) for use as an outer wall. For example, the material mentioned in the base film 11 as described above may be used as the transparent plastic material, and among these, polycarbonate, polymethyl methacrylate, polystyrene, transparent ABS, or a combination thereof may be used. have. In this case, the transparent plastic material may be manufactured in a single panel in a bulk form, or may have a structure in which two or more different materials in which a hard coating layer is formed on the surface are stacked.

In addition, the protruding structure of the transparent substrate 200 may be a variety of methods, for example, in the case of a glass material may be formed by etching the surface of the flat glass substrate through a dry or wet etching process. In addition, the transparent plastic material may be manufactured through a molding method by molding rather than an etching method.

The reflective unit integrated OPV module 10 attached to the transparent substrate 200 may be folded in an accordion or bellows shape as shown in FIG. 7 to correspond to the protrusion structure of the transparent substrate 200, and then the transparent substrate 200 may be used. Attached to the top.

8 is a schematic diagram showing the manufacturing of the BIPV module 100 according to an embodiment of the present invention. 8, in the reflective unit integrated OPV module 10, each of the OPV unit 13 and the reflector 15 is disposed on upper and lower surfaces of the protruding structure.

The attachment may be performed by applying an adhesive on the transparent substrate 200 and then laminating the reflective part integrated OPV module 10 and then drying. In this case, the adhesive may be a transparent adhesive material as described above.

Although not shown in the figure, the integrated unit OPV module 10 of the BIPV module 100 converts the collected solar light into electrical energy by being connected to a micro inverter and a wire. At this time, the wire connection is made through the clearance structure of the frame 300 is empty inside, the wire passes through the inside of the frame 300 to connect the BIPV module 100 and the micro inverter to expose the wire to the outside of the building Prevents hurting aesthetics The micro inverter is preferably used for installation individually or in units of a plurality.

The BIPV module 100 is coupled to the plurality of spaced apart in the left and right direction between the frame 300 to perform self-power generation.

9 is a view showing a light reflection path in the BIPV module 100 according to the present invention.

For example, as shown in FIG. 9A, light is incident on each of the OPV unit 13 and the reflector 15 of the BIPV module 100, and the light incident on the OPV unit 13 is photoelectric. Electricity is generated by the conversion mechanism. In addition, the light incident on the reflector 15 is reflected by the refraction pattern Q present on the surface of the reflector 15 through various back reflection paths and is incident on the OPV unit 13.

Due to the reflection part 15 having the refractive pattern Q, the optimum refraction is easy, so that the incident light is effectively reflected to the OPV unit 13 in any direction in which light is incident, thereby ensuring photoelectric conversion efficiency with optimum efficiency.

In addition, as an example, as shown in FIG. 9B, light is incident on each of the OPV unit 13 and the reflecting unit 15 of the BIPV module 100, and at this time, the light is incident on the OPV unit 13. Generates electricity by means of a photoelectric conversion mechanism. In addition, the light incident on the reflector 15 is reflected by the refraction pattern Q present on the surface of the reflector 15 through various back reflection paths and is incident on the OPV unit 13.

In particular, it is possible to shape the design in the building itself through various arrangements of the BIPV module 100 proposed in the present invention. This design gives the building a design and can express various personalities, maximizing the beauty of the building.

Claims

Base film;

An organic solar cell unit formed in a stripe pattern shape extending in one direction on the base film; And

It includes a reflector formed in a stripe pattern extending in the same direction in the remaining area in which the organic solar cell unit is not formed on the base film,

The reflector may include at least one reflective layer including a reflective layer capable of reflecting incident light to the organic solar cell part due to a difference in refractive index, and a reflective layer having a refractive pattern formed on a surface thereof to reflect the incident light to the organic solar cell part. Integrated organic solar cell module.
The method of claim 1,

The reflective layer capable of reflecting incident light to the organic solar cell unit due to the refractive index difference may include a single layer or a multilayer film including light reflection or light scattering particles in at least one film;

A multilayer film in which two or more layers of films having different refractive indices are laminated; or

A multilayer integral film solar cell module having a multilayer film having layers having different refractive indices, and having a film having light reflection or light scattering particles present in any one of these layers.
The method of claim 2,

The light reflection or light scattering particles is a reflection unit integrated organic solar cell module, characterized in that it comprises one or more materials selected from the group consisting of glass, inorganic particles and organic particles.
The method of claim 3,

The inorganic particles are at least one member selected from the group consisting of zirconia, titania, ceria, alumina, iron oxide, vanadia, antimony oxide, tin oxide, and alumina / silica.
The method of claim 3,

The organic solar cell module of the reflector unit, characterized in that the organic particles comprise a transparent polymer material.
The method of claim 1,

The refraction pattern integrated organic solar cell module, characterized in that the embossed or intaglio pattern.
The method of claim 1,

The refractive pattern is an organic solar cell module, characterized in that the jagged, polyhedral (multifaceted), pyramidal, conical (conical) or semi-rounded.
The method of claim 6,

The reflective layer on which the embossed or negative refraction pattern is formed

A single layer or multilayer film comprising light reflecting or light scattering particles inside one film;

A multilayer film in which two or more layers of films having different refractive indices are laminated; or

Reflective unit-integrated organic solar cell module, characterized in that formed into a multi-layer film having a multilayer film having a layer having a different refractive index laminated, the film having light reflection or light scattering particles present in any one of these layers; .
The method of claim 1,

The base film is a reflection unit integrated organic solar cell module, characterized in that the transparent polymer material.
The method of claim 1,

The organic solar cell unit is a reflective unit integrated organic solar cell module, characterized in that the cathode, photoactive layer and the anode are sequentially stacked on the base film.
The method of claim 1,

The reflective layer integrated organic solar cell module, characterized in that the transparent polymer material.
As a BIPV module (building integrated photo voltaic) that can form the outer wall of a building,

A transparent substrate extending laterally in the frame and having a protruding structure; And a reflective unit integrated organic solar cell module according to claim 1 mounted on the transparent substrate, wherein the organic solar cell unit and the reflective unit are arranged up and down.
The method of claim 12,

The protruding structure is a BIPV module, characterized in that it has a circular or polygonal cross-sectional structure so that the organic solar cell unit and the reflecting unit mounted thereon may be disposed at a predetermined angle.