KR20200006834A - Perovskite solar cell module - Google Patents

Abstract

The present invention relates to a perovskite solar cell module with improved electrical characteristics and efficiency. According to an embodiment of the present invention, the perovskite solar cell module has a plurality of connected solar cells. Each solar cell is formed on a substrate and includes: a first electrode formed on the substrate; a second electrode formed on the first electrode; and an intermediate layer which is arranged between the first and the second electrode, and includes a light absorption layer containing at least a perovskite-based material. A plurality of the first electrodes are formed to form gap regions therebetween. The second electrode includes a connection region connected to the first electrode in one region. A plurality of the second electrodes are formed to form separation regions therebetween. The connection region is connected to the gap regions or the separation regions at least in one region based on an arrangement direction of the plurality of solar cells.

Description

Perovskite solar cell module

The present invention relates to a perovskite solar cell module.

As the interest and need for the development of technology and environmental protection increases, attempts for research and application of solar cells have been active.

The solar cell may have various forms, and basically, a process of converting light energy into electrical energy using a photovoltaic effect in which electrons are generated when light is incident on a structure of a p-n junction diode is used.

The solar cell may include a small unit of cells, and may include a module structure manufactured in the form of a panel to electrically connect such cells to obtain a voltage of several volts (V) or more and several hundred volts (V) or more.

On the other hand, according to the recent speed of technology development and the rapid improvement of the living standard of users, the field to use the solar cell module is increasing more, and the use condition of the solar cell module is also required more variously.

In addition, solar cells including perovskite materials have been researched in manufacturing such solar cell modules. Perovskite materials can be used to easily produce perovskite solar cell modules at relatively low cost.

However, the voltage and current values obtained by one cell using perovskite are limited, and the electrical characteristics and efficiency of the perovskite solar cell module are limited.

The present invention can provide a perovskite solar cell module with improved electrical characteristics and efficiency.

An embodiment of the present invention relates to a perovskite solar cell module in which a plurality of solar cells are connected, wherein each solar cell is formed on a substrate, and a first electrode formed on the substrate, the first electrode And an intermediate layer including a second electrode formed on the electrode and a light absorption layer disposed between the first electrode and the second electrode and containing at least a perovskite-based material, wherein the first electrode is formed in plurality. Spaced apart regions are formed between the first electrodes, and the second electrode includes a connection region connected to the first electrode in one region, and the second electrode is formed in plural to form a plurality of second electrodes. An isolation region is formed therebetween, and the connection region is formed to be connected to the separation region or the separation region in at least one region based on the arrangement direction of the plurality of solar cells. A perovskite solar cell module is disclosed.

In the present embodiment, the connection region and the separation region have a length in a direction crossing the array direction of the plurality of solar cells, and the connection region and the separation region are connected to each other in the entire region based on the length direction. Can be formed.

In the present embodiment, the connection region and the isolation region have a length in a direction crossing the array direction of the plurality of solar cells, and the connection region and the isolation region are connected to each other in the entire region based on the length direction. Can be formed.

In the present exemplary embodiment, the intermediate layer may further include a charge transfer layer disposed between the light absorption layer and the first electrode or the light absorption layer and the second electrode.

In the present embodiment, the charge transport layer may include a hole transport layer or an electron transport layer.

In the present exemplary embodiment, each solar cell may include an active region in which the first electrode, the second electrode, and an intermediate layer therebetween overlap.

Other aspects, features, and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

Perovskite solar cell module according to the present invention can be improved electrical properties and efficiency.

1 is a schematic plan view of a perovskite solar cell module according to an embodiment of the present invention.
FIG. 2 is an enlarged view of K of FIG. 1.
3 is a schematic perspective top view of FIG. 2.
4 is a cross-sectional view taken along the line IV-IV of FIG. 3.
FIG. 5 illustrates an alternative embodiment of FIG. 3.
6 illustrates another alternative embodiment of FIG. 3.
FIG. 7 illustrates another alternative embodiment of FIG. 3.
FIG. 8 is a cross-sectional view for describing a separation area of FIG. 3.
9 is a cross-sectional view for describing a connection area of FIG. 3.
FIG. 10 is a diagram illustrating a modification of FIG. 9.
FIG. 11 is a diagram illustrating another modified example of FIG. 9.
FIG. 12 is a diagram illustrating another modified example of FIG. 9.
FIG. 13 is a cross-sectional view for describing an isolation region of FIG. 3.
FIG. 14 is a diagram illustrating a modification of FIG. 13.
FIG. 15 is a diagram illustrating another modified example of FIG. 13.
FIG. 16 is a diagram illustrating another modified example of FIG. 13.
FIG. 17 is a diagram illustrating another modified example of FIG. 13.
FIG. 18 is a diagram illustrating another modified example of FIG. 3.

Hereinafter, with reference to the embodiments of the present invention shown in the accompanying drawings will be described in detail the configuration and operation of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. Effects and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various forms.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals, and redundant description thereof will be omitted. .

In the following embodiments, the terms first, second, etc. are used for the purpose of distinguishing one component from other components rather than a restrictive meaning.

In the following examples, the singular forms “a”, “an” and “the” include plural forms unless the context clearly indicates otherwise.

In the following examples, the terms including or having have meant that there is a feature or component described in the specification and does not preclude the possibility of adding one or more other features or components.

In the drawings, components may be exaggerated or reduced in size for convenience of description. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, and thus the present invention is not necessarily limited to the illustrated.

In the following embodiments, the x-axis, y-axis, and z-axis are not limited to three axes on the Cartesian coordinate system, and may be interpreted in a broad sense including the same. For example, the x, y, and z axes may be orthogonal to one another, but may refer to different directions that are not orthogonal to each other.

Where certain embodiments may be implemented differently, a particular process order may be performed differently from the described order. For example, two processes described in succession may be performed substantially concurrently, or may be performed in the reverse order.

1 is a schematic plan view showing a perovskite solar cell module according to an embodiment of the present invention, Figure 2 is an enlarged view of K of FIG.

1 and 2, the perovskite solar cell module 100 of the present embodiment may include one or more solar cells, for example, a plurality of solar cells C1, C2, C3,. Cn).

Although not shown, the perovskite solar cell module 100 of the present embodiment may be disposed on at least one side of the plurality of solar cells C1, C2, C3, ..., Cn or the plurality of solar cells C1, C2, It may also include an unformed region in which no solar cell is formed around C3, ..., Cn).

The plurality of solar cells C1, C2, C3,..., Cn may be formed so that at least one region is separated, for example, a separation region CS may be formed between adjacent cells. As a specific example, an isolation region CS may be formed between the second solar cell C2 and the third solar cell C3.

FIG. 3 is a schematic perspective plan view of FIG. 2, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3.

Referring to FIG. 4, one solar cell C2 of the perovskite solar cell module 100 of the present embodiment is a substrate 101, a first electrode 110, a second electrode 140, and an intermediate layer 130. It may include.

The substrate 101 may be formed of various materials. For example, the substrate 101 may have a plate shape.

The substrate 101 may be formed of a transparent material, for example, may contain a glass material or a plastic material. The substrate 101 may be formed to be rigid or flexible as necessary.

In some embodiments, the substrate 101 may include a ceramic substrate such as alumina, a metal material such as stainless steel, or a flexible polymer.

As a specific embodiment, the substrate 101 may be made of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), polypropylene (PP). It may contain polyimide (PI) or tri acetyl cellulose (TAC).

The first electrode 110 may be formed using various conductors, and may be formed of a material having high light transmittance as an optional embodiment.

For example, the first electrode 110 may be formed of indium tin oxide (ITO), fluorine tin oxide (FTO), antimony tin oxide (ATO), zinc oxide or zinc oxide. Tin oxide, ZnOGa 2 O 3, ZnO—Al 2 O 3, and the like.

As an optional embodiment, the first electrode 110 may comprise a single layer or a stack, and each layer of the stack may comprise the same material or different materials.

For example, a single layer of the first electrode 110 may be formed by including one or more of the above-mentioned materials, and when the first electrode 110 is formed of a laminate, one of the materials may be included. It may include one layer comprising one layer and another material.

The intermediate layer 130 may be formed on the first electrode 110 and include at least a light absorption layer 132.

The light absorption layer 132 may include a light absorption material having at least a perovskite structure.

For example, the light absorption layer 132 may have an ABX3 structure.

In this case, A may include at least one material selected from an alkyl group of CnH2n + 1, and inorganic materials such as Cs and Ru capable of forming perovskite solar cells.

B may comprise one or more materials selected from the group consisting of Pb, Sn, Ti, Nb, Zr, and Ce.

X may comprise a halogen material.

As a specific example, the light absorption layer 132 may include CH ₃ NH ₃ PbI ₃ , CH ₃ NH ₃ PbI _x Cl _3-x , MAPbI _3, CH ₃ NH ₃ PbI _x Br _3-x , CH ₃ NH ₃ PbClxBr _3-x , HC (NH ₂ ) ₂ PbI ₃ , HC (NH ₂ ) ₂ PbI _x Cl _3-x , HC (NH ₂ ) ₂ PbI _x Br _3-x , HC (NH ₂ ) ₂ PbCl _x Br _3-x , (CH ₃ NH ₃ ) (HC (NH ₂ ) ₂ ) _1-y PbI ₃ , (CH ₃ NH ₃ ) (HC (NH ₂ ) ₂ ) _1-y PbI _x Cl _3-x , (CH ₃ NH ₃ ) (HC (NH ₂ ) ₂ ) _1-y PbI _x Br _3-x , or (CH ₃ NH ₃ ) (HC (NH ₂ ) ₂ ) _1-y PbCl _x Br _3-x (0≤x, y≤1) It may include.

In some embodiments, the light absorption layer 132 may also include a compound in which Cs is partially doped in A of the ABX3.

The second electrode 140 may be formed on the intermediate layer 130 and overlap the first electrode 110 and the intermediate layer 130 in at least one region.

The second electrode 140 may be formed using various conductive materials.

In some embodiments, the second electrode 140 may include molybdenum (Mo), gold (Au), silver (Ag), aluminum (Al), chromium (Cr), tungsten (W), copper (Cu), and platinum (Pt). At least one material selected from the group consisting of ruthenium (Ru), palladium (Pd), iridium (Ir), rhodium (Rh), osmium (Os), carbon (C), indium (In), WO3, TiO2 and conductive polymers It can be formed using.

The electrons in the light absorption layer 132 are excited by the light absorbed by the light absorption layer 132, and the generated electrons and holes may move to the first electrode 110 or the second electrode 140, respectively. .

In this case, as an optional embodiment, one or more charge transfer layers 131 and 133 may be included to facilitate the movement of electrons and holes.

For example, the charge transfer layers 131 and 133 may include the first charge transfer layer 131 or the second charge transfer layer 133.

The charge transport layers 131 and 133 may include an electron transport layer or a hole transport layer.

The first charge transfer layer 131 may be disposed between the first electrode 110 and the light absorption layer 132.

In some embodiments, the first charge transport layer 131 may include an electron transport layer. For example, the first charge transfer layer 131 may include an inorganic material and may include a metal oxide. In some embodiments, the first charge transfer layer 131 may include a flat metal oxide layer, a metal oxide layer having surface irregularities, and a layer in which a thin metal oxide nanostructure is formed, and may be a porous metal oxide layer or a dense metal oxide. It may comprise a layer.

As a specific example, the first charge transfer layer 131 may include, for example, Ti oxide, Zn oxide, In oxide, Sn oxide, W oxide, Nb oxide, Mo oxide, Mg oxide, Zr oxide, Sr oxide, Yr oxide, It may include any one or two or more selected from La oxide, V oxide, Al oxide, Y oxide, Sc oxide, Sm oxide, Ga oxide, In oxide, and SrTi oxide and composites thereof. As an example, the first charge transfer layer 131 may include a Ti oxide (eg, TiO 2).

In some embodiments, the second charge transfer layer 133 may be disposed between the second electrode 140 and the light absorption layer 132.

In some embodiments, the second charge transport layer 133 may include a hole transport layer. The second charge transfer layer 133 includes a hole transfer layer and specifically includes a hole transfer material, for example, one or two or more of thiophene, paraphenylenevinylene, carbazole and triphenylamine. It may include the selected material.

As a specific example, when the second charge transfer layer 133 includes a hole transfer layer, P3HT (poly [3-hexylthiophene]), MDMO-PPV (poly [2-methoxy-5- (3 ', 7'-dimethyloctyloxyl) )]-1,4-phenylene vinylene), MEH-PPV (poly [2-methoxy-5 (2 ''-ethylhexyloxy) -p-phenylenevinylene]), P3OT (poly (3-octyl thiophene)), POT ( poly (octyl thiophene)), P3DT (poly (3-decyl thiophene)), P3DDT (poly (3-dodecyl thiophene), PPV (poly (p-phenylene vinylene)), TFB (poly (9,9'-dioctylfluorene- co-N- (4-butylphenyl) diphenyl amine), Polyaniline, Spiro-MeOTAD ([2,2,2 ′, 7,7,7′-tetrkis (N, N-di-pmethoxyphenylamine) -9,9,9 ′ -Spirobi fluorine]), CuSCN, CuI, PCPDTBT (Poly [2,1,3-benzothiadiazole-4,7-diyl [4,4-bis (2-ethylhexyl-4H-cyclopenta [2,1-b: 3 , 4-b '] dithiophene-2,6-diyl]], Si-PCPDTBT (poly [(4,4′-bis (2-ethylhexyl) dithieno [3,2-b: 2 ′, 3′-d] silole) -2,6-diyl-alt- (2,1,3-benzothiadiazole) -4,7-diyl]), PBDTTPD (poly ((4,8-diethylhexyloxyl) benzo ([1,2-b: 4 , 5-b '] dithiophene) -2,6-diyl) -alt-((5-octylthieno [3,4-c] pyrrole-4,6-dione) -1,3-diyl)), PFDTB T (poly [2,7- (9- (2-ethylhexyl) -9-hexyl-fluorene) -alt-5,5- (4 ', 7, -di-2-thienyl-2', 1 ', 3 '-benzothiadiazole)]), PFO-DBT (poly [2,7-.9,9- (dioctyl-fluorene)-

alt-5,5- (4 ', 7'-di-2-.thienyl-2', 1 ', 3'-benzothiadiazole)]), PSiFDTBT (poly [(2,7-dioctylsilafluorene) -2,7- diyl-alt- (4,7-bis (2-thienyl) -2,1,3-benzothiadiazole) -5,5′-diyl]), PSBTBT (poly [(4,4′-bis (2-

ethylhexyl) dithieno [3,2-b: 2 ', 3'-d] silole) -2,6-diyl-alt- (2,1,3-benzothiadiazole) -4,7-diyl]),

PCDTBT (Poly [[9- (1-octylnonyl) -9H-carbazole-2,7-diyl] -2,5-thiophenediyl -2,1,3-benzothiadiazole-4,7-diyl-2,5-thiophenediyl] ), PFB (poly (9,9′-dioctylfluorene-co-bis (N, N ′-(4, butylphenyl)) bis (N, N′-phenyl-1,4-phenylene) diamine), F8BT (poly ( 9,9′-dioctylfluorene-co-benzothiadiazole), PEDOT (poly (3,4-ethylenedioxythiophene)), PEDOT: PSS poly (3,4-ethylenedioxythiophene) poly (styrenesulfonate), PTAA (poly (triarylamine)), Poly ( 4-butylphenyl-diphenyl-amine) and copolymers thereof, or any one or two or more thereof.

Referring to FIG. 3, the perovskite solar cell module 100 of the present embodiment may include a separation area BS, a connection area CA, and a separation area CS.

In addition, referring to FIG. 3, a plurality of solar cells C2 and C3, that is, a second solar cell C2 and a third solar cell C3 included in the perovskite solar cell module 100 are illustrated. Doing. These cells are selected for convenience of description.

Each solar cell may include an active region AA in which at least the first electrode 110, the intermediate layer 130, and the second electrode 140 overlap each other.

The separation area BS, the connection area CA, and the separation area CS each have a width, for example, the width of the separation area BS, the connection area CA, and the separation area CS, for example, from the second solar cell C2 toward the third solar cell C3. Have

The connection area CA may be connected to the separation area BS in at least one area. In some embodiments, the connection area CA and the separation area BS may be connected to each other in the width direction in an area corresponding to the entire length.

The perovskite solar cell module of the present embodiment may include a plurality of solar cells, and the connection area CA may be entirely connected in the connection or length direction in one area with the separation area BS, thereby through each By increasing the active area AA of the cell effectively, the electrical efficiency of the solar cells may be improved.

FIG. 5 illustrates an alternative embodiment of FIG. 3. For convenience of description, only the points different from FIG. 3 will be described.

Referring to FIG. 5, the width of the connection area CA may be greater than the width of the separation area CS. In addition, the width of the connection area CA may be larger than the width of the separation area BS. Through this, stability of the electrical connection between the first electrode 110 and the second electrode 140 may be improved.

In addition, the width of the separation region CS between two adjacent second electrodes of the plurality of second electrodes may be formed to be smaller than the width of the connection region CA to which the first electrode and the second electrode are directly connected. While effectively separating the second electrodes, the area connected between the first electrode and the second electrode may be increased to improve contact and electrical characteristics between the first electrode and the second electrode.

6 illustrates another alternative embodiment of FIG. 3. For convenience of description, only the points different from FIG. 3 will be described.

Referring to FIG. 6, the connection area CA may be connected to the separation area CS in at least one area. In some embodiments, the connection area CA and the separation area CS may be connected to each other in the width direction in an area corresponding to the entire length.

The perovskite solar cell module of the present embodiment may include a plurality of solar cells, and the connection area CA may be entirely connected in the connection or length direction in one area with the separation area CS, thereby allowing each By increasing the active area AA of the cell effectively, the electrical efficiency of the solar cells may be improved. In addition, it is possible to prevent or detect the formation of the light absorption region for the intermediate layer in the unnecessary region.

FIG. 7 illustrates another alternative embodiment of FIG. 3. For convenience of description, only the points different from FIG. 3 will be described.

Referring to FIG. 7, the connection area CA may be connected to the separation area CS in at least one area. In some embodiments, the connection area CA and the separation area CS may be connected to each other in the width direction in an area corresponding to the entire length.

In addition, referring to FIG. 7, the connection area CA may be connected to the separation area BS in at least one area. In some embodiments, the connection area CA and the separation area BS may be connected to each other in the width direction in an area corresponding to the entire length.

The perovskite solar cell module of the present embodiment may include a plurality of solar cells, and the connection area CA may be entirely connected in the connection or length direction in one area with the separation area BS, thereby through each By increasing the active area AA of the cell effectively, the electrical efficiency of the solar cells may be improved.

In addition, the connection area CA may be connected to the isolation area CS as a whole in the connection or length direction in one area, thereby effectively increasing the active area AA of each cell to improve electrical efficiency of the solar cells. Can be. In addition, it is possible to prevent or detect the formation of the light absorption region for the intermediate layer in the unnecessary region.

FIG. 8 is a cross-sectional view for describing a separation area of FIG. 3.

The spaced area BS is formed on the first electrode 110 formed on the substrate 101. Specifically, the perovskite solar cell module 100 may include at least two first electrodes 110 adjacent to each other. In addition, the separation area BS may be formed between the adjacent first electrodes 110.

Referring to FIG. 3, a plurality of solar cells C2 and C3, that is, a second solar cell C2 and a third solar cell C3 included in the perovskite solar cell module 100 are illustrated. have. These cells are selected for convenience of description.

In some embodiments, one first electrode 110 may be formed over the second solar cell C2 and the third solar cell C3.

In addition, the separation area BS may be formed in each of the second solar cell C2 and the third solar cell C3.

The separation area BS may have a width with respect to the arrangement direction of the second solar cell C2 and the third solar cell C3, and may be formed long in the direction crossing the second solar cell C2 and the third solar cell C3.

8, as an alternative embodiment, the separation area BS may be formed in a shape in which a part of the first electrode 110 formed on the substrate 101 is removed, and the width of the separation area BS may be substantially zero. It may be a spaced distance between the first electrode 110 and the first electrode 110 adjacent thereto.

In some embodiments, the intermediate layer 130 may be formed in the separation region BS. For example, the first charge transfer layer 131 may be disposed. In addition, at least one region of the intermediate layer 130 may fill the space of the separation region BS.

8 may also be applied to the structures of FIGS. 5 to 7 described above.

9 is a cross-sectional view for describing a connection area of FIG. 3.

FIG. 10 is a diagram illustrating a modification of FIG. 9, FIG. 11 is a diagram illustrating another modification of FIG. 9, and FIG. 12 is a diagram showing another modification of FIG. 9.

The connection area CA may be an area connected to the first electrode 110 among the areas of the second electrode 140.

The second electrode 140 may include an intermediate layer 130 spaced apart from the first electrode 110 in one region, and may correspond to the active region AA of FIG. 3.

The active area AA may include a region in which light absorption and hole and electron flow are generated efficiently.

The connection area CA may include an area disposed outside the active area AA and directly connected to the first electrode 110 in the thickness direction of the substrate 101, for example.

The connection area CA may be formed in each of the second solar cell C2 and the third solar cell C3.

For example, the second electrode 140 overlaps with the first electrode of the active region of one solar cell in one region, and the first electrode of another solar cell adjacent thereto through the connection region CA in another region. Can be electrically connected to the

As a specific example, one region of one second electrode 140 overlaps the first electrode 110 to correspond to the active region AA of the second solar cell C2 and is spaced apart from the first electrode 110. Another region of the second electrode 140 may be electrically connected to the first electrode 110 corresponding to the active region AA of the third solar cell C3, so that the third solar cell C3 is active. The first electrode 110 corresponding to the region AA may be connected to the elongated portion of the first electrode 110, specifically, through the connection region CA.

The connection area CA may have a width with respect to the arrangement direction of the second solar cell C2 and the third solar cell C3, and may be formed long in the direction crossing the second solar cell C2 and the third solar cell C3.

In some embodiments, the width of the connection area CA may be formed to be at least equal to or greater than the width of the separation area BS.

In some embodiments, the connection area CA may be disposed to correspond to the contact hole 130C formed in the intermediate layer 130. For example, the width of the connection area CA may correspond to the width of the contact hole 130C formed in the intermediate layer 130.

In addition, the connection area CA may be connected to the separation area BS in at least one area. For example, a boundary line of one side of the connection area CA may meet the boundary line of the separation area BS. In some embodiments, an extension line of the boundary line of one side of the connection area CA may overlap the boundary line of the separation area BS.

9 may also be applied to the structures of FIGS. 5 and 7 described above.

FIG. 10 is a view illustrating a modified example of FIG. 9, and referring to FIG. 10, boundary lines of one region of the connection area CA and boundary lines of the separation area BS may include irregularities. As another example, the boundary line of one region of the connection region CA and the boundary line of the separation region BS may include a curve.

FIG. 11 is a diagram illustrating another modified example of FIG. 9, and FIG. 12 is a diagram illustrating another modified example of FIG. 9.

Referring to FIG. 11, the width of the connection area CA is different for each area, and more specifically, the width of the area farther from the substrate 101 is greater than the width of the area toward the substrate 101 among the areas of the connection area CA. Can be large. For example, the boundary line of the side of the connection area CA may include a slope. Through this, the second electrode 140 may be easily disposed in the contact hole 130C of the intermediate layer 130.

In addition, referring to FIG. 12, the width of the connection area CA is different for each area, and specifically, the width of the area of the connection area CA toward the substrate 101 is greater than the width of the area away from the substrate 101. Can be larger. For example, the boundary line of the side of the connection area CA may include a slope. As a result, an area in contact with the second electrode 140 and the first electrode 110 may be increased to improve electrical contact characteristics and connection characteristics.

FIG. 13 is a cross-sectional view for describing an isolation region of FIG. 6 or 7.

FIG. 14 is a diagram illustrating a modification of FIG. 13, FIG. 15 is a diagram illustrating another modification of FIG. 13, and FIG. 16 is a diagram showing another modification of FIG. 13.

The isolation region CS may be formed between at least two second electrodes 140 adjacent to each other.

In some embodiments, one second electrode 140 corresponds to the second solar cell C2, and the other second electrode 140 adjacent to the second solar cell C2 is formed to correspond to the third solar cell C3. Can be.

In addition, the isolation region CS may be formed between the second solar cell C2 and the third solar cell C3.

The isolation region CS may have a width with respect to the arrangement direction of the second solar cell C2 and the third solar cell C3, and may be formed long in the direction crossing the second solar cell C2 and the third solar cell C3.

The width of the isolation region CS may be a spaced distance between the second electrode 140 and the second electrode 140 adjacent thereto. As a specific example, it may be a distance between the second electrode 140 of the second solar cell C2 and the second electrode 140 of the third solar cell C3.

As an optional embodiment, referring to FIG. 13, the isolation region CS may be formed in a form in which some regions of the second electrode 140 formed on the substrate 101 are removed. In addition, the via hole 130H may be formed in the intermediate layer 130 to correspond to the isolation region CS.

In some embodiments, the width of the isolation region CS may be at least smaller than the width of the connection region CA.

In addition, the separation region CS may be connected to the connection region CA in at least one region. For example, one side of the separation region CS and one side of the connection region CA may be connected to each other. In some embodiments, the side of the connection area CA may be connected to a region corresponding to the entire length of the separation area CS.

14 is a view illustrating a modified example of FIG. 13, and referring to FIG. 14, a boundary line of one region of the separation region CS or a boundary line of both sides in the width direction may include irregularities. As another example, the boundary line of one region of the separation region CS may include a curve.

FIG. 15 is a diagram illustrating another modified example of FIG. 13, and FIG. 16 is a diagram illustrating another modified example of FIG. 13.

Referring to FIG. 15, the width of the isolation region CS is different for each region, and specifically, the width of the region farther from the substrate 101 is greater than the width of the region facing the substrate 101 among the regions of the isolation region CS. Can be large. For example, the boundary line of the side of the separation region CS may include a slope. As a result, separation of the second electrode 140 through the separation region CS may be facilitated in a region far from the first electrode 110.

Referring to FIG. 16, the width of the isolation region CS is different for each region, and specifically, the width of the region of the isolation region CS toward the substrate 101 is greater than the width of the region far from the substrate 101. Can be large. For example, the boundary line of the side of the separation region CS may include a slope. As a result, separation of the second electrode 140 through the separation region CS may be facilitated in an area adjacent to the first electrode 110.

FIG. 17 is a diagram illustrating another modified example of FIG. 13.

Referring to FIG. 17, a connection region CA is formed, and the intermediate layer 130 may not include a via hole so as to correspond thereto.

In some embodiments, the connection area CA may be disposed between the separation area BS and the separation area CS based on the planar direction of the substrate 101.

3, the isolation region CS and the connection region CA may be spaced apart from each other. For example, based on the planar direction of the substrate 101 or the direction from the second solar cell C2 toward the third solar cell C3, the separation region CS and the connection region CA may be formed. There may be two intervals L2.

In addition, the region of the second electrode 140 corresponding to the connection region CA may be spaced apart from the isolation region CS at a second interval L2, and as an optional embodiment, the second interval L2 may be spaced apart from the separation region CS. At least one region of the intermediate layer 130 may be disposed in an area corresponding to the intermediate layer 130.

In some embodiments, the width of the connection area CA may have a larger value than the width of the second gap L2.

In addition, as a specific embodiment, the width of the connection area CA may have a value of 1.1 times or more than the width of the second gap L2. In some embodiments, the width of the connection area CA may have a value of 1.1 times to 3.0 times the width of the second gap L2.

As a result, the width of the connection area CA may be easily secured to improve stability of electrical characteristics between the first electrode 110 and the second electrode 140.

In some embodiments, the width of the separation area BS and the separation area CS may have a value larger than the width of the second gap L2.

6, the separation area BS and the connection area CA may be spaced apart from each other. For example, based on the planar direction of the substrate 101 or the direction from the second solar cell C2 toward the third solar cell C3, the gap between the separation area BS and the connection area CA is defined. There may be one interval L1.

In addition, the region of the second electrode 140 corresponding to the connection area CA may be spaced apart from the separation area BS with the first interval L1. In some embodiments, the first interval L1 may be spaced apart from each other. At least one region of the intermediate layer 130 may be disposed in an area corresponding to the intermediate layer 130.

In some embodiments, the width of the connection area CA may have a larger value than the width of the first gap L1.

In addition, as a specific embodiment, the width of the connection area CA may have a value of 1.1 times or more than the width of the first gap L1. In some embodiments, the width of the connection area CA may have a value of 1.1 times to 3.0 times the width of the first gap L1.

As a result, the width of the connection area CA may be easily secured to improve stability of electrical characteristics between the first electrode 110 and the second electrode 140.

In some embodiments, the width of the separation area BS and the separation area CS may have a value larger than the width of the first gap L1.

FIG. 18 is a diagram illustrating another modified example of FIG. 3.

Referring to FIG. 18, an active region AA of each solar cell is illustrated, and the separation region BS, the connection region CA, and the isolation region CS are formed to be adjacent to each other.

The separation area BS may be connected to the connection area CA in one area based on the length direction.

That is, when a direction from one solar cell to another solar cell is referred to as a width, and a direction intersecting the direction of the width or a direction orthogonal to the width is called a longitudinal direction, at least one region based on the longitudinal direction The separation area BS may be connected to the connection area CA in one area based on the length direction.

In some embodiments, the separation area BS may be connected to the connection area CA in the entire area based on the length direction.

The separation region CS may be connected to the connection region CA in one region based on the length direction.

That is, when a direction from one solar cell to another solar cell is referred to as a width, and a direction intersecting the direction of the width or a direction orthogonal to the width is called a longitudinal direction, at least one region based on the longitudinal direction The separation region CS may be connected to the connection region CA in one region based on the length direction.

In some embodiments, the isolation region CS may be connected to the connection region CA in the entire region based on the length direction.

In this case, the width of the connection area CA may be larger than the width of the separation area CS, and in some embodiments, the width of the connection area CA may be 1.1 to 3 times the width of the separation area CS. Can have The width of the connection area CA may be greater than that of the separation area CS to improve the connection characteristics of the first electrode 110 and the second electrode 140 through the connection area CA. When the width of the connection area CA exceeds three times the width of the separation area CS, the width of the connection area CA may affect the securing of the active area AA and may be three times or less.

In addition, as an optional embodiment, the correlation between the width of the connection area CA and the width of the separation area CS may be selectively applied to the above-described FIGS. 3, 5, 6, and 7.

In addition, the width of the connection area CA may be larger than the width of the separation area BS, and in some embodiments, the width of the connection area CA may be 1.1 to 3 times the width of the separation area BS. Can be. The width of the connection area CA may be greater than that of the separation area BS to improve the connection characteristics of the first electrode 110 and the second electrode 140 through the connection area CA. When the width of the connection area CA exceeds three times the width of the separation area BS, the connection area CA may affect the securing of the active area AA, and thus may be three times or less.

In addition, as an optional embodiment, the correlation between the width of the connection area CA and the width of the separation area CS may be selectively applied to the above-described FIGS. 3, 5, 6, and 7.

The perovskite solar cell module of the present embodiment can be effectively used for the active region through the configuration of the separation region, the connection region and the isolation region adjacent to the active region of each cell. This can facilitate the expansion of the active area and increase the performance and capacity of the perovskite solar cell module.

The width of the separation area between two adjacent first electrodes of the plurality of first electrodes may be formed to be smaller than the width of the connection area in which the first electrode and the second electrode are directly connected. That is, the width of the connection region can be made larger than the width of the separation region. As a result, the contact area and the electrical property between the first electrode and the second electrode may be improved by increasing the area connected between the first electrode and the second electrode while effectively separating the first electrodes.

In addition, the width of the separation region between two adjacent second electrodes of the plurality of second electrodes may be formed to be smaller than the width of the connection region to which the first electrode and the second electrode are directly connected. That is, the width of the connection area can be made larger than the width of the separation area. As a result, the contact area and the electrical property between the first electrode and the second electrode may be improved by increasing the area connected between the first electrode and the second electrode while effectively separating the second electrodes.

In addition, the width of the connection area may be greater than the width of the separation area and the separation area to improve the electrical characteristics of the connection between the first electrode and the second electrode without affecting the width of the active area.

As described above, the present invention has been described with reference to the embodiments illustrated in the drawings, which are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible. . Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Specific implementations described in the embodiments are embodiments, and do not limit the scope of the embodiments in any way. In addition, unless specifically mentioned, such as "essential", "important" may not be a necessary component for the application of the present invention.

In the specification of the embodiments (particularly in the claims), the use of the term " above " and similar indicating terms can be used in the singular and plural. In addition, when a range is described in an embodiment, the invention includes the invention to which the individual values belonging to the range are applied (unless stated to the contrary), and the description is the same as describing each individual value constituting the range. . Finally, if there is no explicit order or contradiction with respect to the steps constituting the method according to the embodiment, the steps may be performed in a suitable order. The embodiments are not necessarily limited according to the order of description of the above steps. The use of all examples or exemplary terms (eg, etc.) in the embodiments is merely for describing the embodiments in detail, and the scope of the embodiments is limited by the above examples or exemplary terms unless defined by the claims. It is not. Also, one of ordinary skill in the art appreciates that various modifications, combinations and changes can be made in accordance with design conditions and factors within the scope of the appended claims or their equivalents.

100: perovskite solar module
C1, C2, C3,... , Cn: solar cell
101: substrate
110: first electrode
130: middle layer
140: second electrode

Claims (6)

The present invention relates to a perovskite solar cell module in which a plurality of solar cells are connected.
Each solar cell is formed on a substrate,
A first electrode formed on the substrate;
A second electrode formed on the first electrode; And
An intermediate layer disposed between the first electrode and the second electrode, the intermediate layer including a light absorption layer containing at least a perovskite-based material;
The first electrode is formed in plural and a spaced area is formed between each first electrode, and the second electrode includes a connection area connected to the first electrode in one area, and the second electrode is provided in plurality. Formed to form a separation region between each second electrode,
The perovskite solar cell module, wherein the connection region is formed to be connected to the separation region or the separation region in at least one region based on the arrangement direction of the plurality of solar cells. According to claim 1,
The connection region and the separation region have a length in a direction crossing the array direction of the plurality of solar cells,
The perovskite solar cell module is formed so that the connection region and the separation region are connected to each other in the entire region based on the longitudinal direction. According to claim 1,
The connection region and the separation region have a length in a direction crossing the array direction of the plurality of solar cells,
The perovskite solar cell module is formed so that the connection region and the separation region are connected to each other in the entire region based on the longitudinal direction. According to claim 1,
The intermediate layer,
The perovskite solar cell module further comprises a charge transfer layer disposed between the light absorption layer and the first electrode or the light absorption layer and the second electrode. The method of claim 4, wherein
The charge transport layer is a perovskite solar cell module comprising a hole transport layer or an electron transport layer. According to claim 1,
Wherein each solar cell includes an active region in which the first electrode, the second electrode, and an intermediate layer therebetween overlap.

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