KR102089558B1 - Perovskite solar cell module - Google Patents

Abstract

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

Description

Perovskite solar cell module

The present invention relates to a perovskite solar cell module.

As interest and need for technological advancement and environmental protection increase, attempts for research and application to solar cells are becoming 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 the structure of a p-n junction diode can be used.

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

On the other hand, with the recent development of technology and the rapid improvement of users' standard of living, the field to use the solar cell module is increasing, and the conditions for using the solar cell module are also required to be more diverse.

In addition, a solar cell including a perovskite material has been studied in manufacturing such a solar cell module. A perovskite solar cell module can be easily manufactured at a relatively low cost using a perovskite material.

However, the voltage and current values that can be obtained by one cell using perovskite are limited, and there is a limit in improving the electrical properties and efficiency of the perovskite solar cell module.

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

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

In this embodiment, the connection region and the separation region have a length in a direction crossing the arrangement 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 this embodiment, the connection region and the separation region have a length in a direction crossing the arrangement 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 exemplary embodiment, the intermediate layer may further include a charge transfer layer disposed between the light absorbing layer and the first electrode or between the light absorbing layer and the second electrode.

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

In this 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 than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

The perovskite solar cell module according to the present invention can improve electrical characteristics and efficiency.

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

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

The present invention can be applied to various transformations and can have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention and methods for achieving them will be clarified with reference to embodiments described below in detail with reference to 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 when describing with reference to the drawings, and redundant description thereof will be omitted. .

In the following examples, terms such as first and second are not used in a limiting sense, but for the purpose of distinguishing one component from other components.

In the following embodiments, singular expressions include plural expressions, unless the context clearly indicates otherwise.

In the examples below, terms such as include or have are meant to mean the presence of features or components described in the specification, and do not preclude the possibility of adding one or more other features or components in advance.

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

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

When an embodiment can be implemented differently, a specific process order may be performed differently from the described order. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order opposite to that described.

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

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

Although not shown, the perovskite solar cell module 100 of the present embodiment is at least one side of the plurality of solar cells (C1, C2, C3, ..., Cn) or a plurality of solar cells (C1, C2, A non-forming region in which a solar cell is not formed may be included around C3, ..., Cn).

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

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 includes 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 required.

As an optional embodiment, the substrate 101 may include a ceramic substrate such as alumina, a metallic material such as stainless steel, or a flexible polymer.

As a specific embodiment, the substrate 101 is polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (Poly-Carbonate: PC), polypropylene (Poly-Propylene: PP) , 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 includes indium tin oxide (ITO), fluorine tin oxide (FTO), antimony tin oxide (ATO), zinc oxide (Zinc oxide), or Tin oxide (Tin Oxide), ZnOGa2O3, ZnO-Al2O3 and the like.

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

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 as a laminate, one material among the materials may be included. It may include one layer including one layer and another one material.

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

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

For example, the light absorbing layer 132 may be formed of an ABX3 structure.

At this time, A may include one or more materials selected from CnH2n + 1 alkyl groups, and inorganic materials such as Cs and Ru capable of forming a perovskite solar cell structure.

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

X may include a halogen material.

As a specific example, the light absorbing layer 132 is 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 can contain.

In addition, as an optional embodiment, the light absorbing layer 132 may also include a compound in which Cs is partially doped to A of ABX3.

The second electrode 140 is formed on the intermediate layer 130 and may 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.

As an optional embodiment, the second electrode 140 is molybdenum (Mo), gold (Au), silver (Ag), aluminum (Al), chromium (Cr), tungsten (W), copper (Cu), platinum (Pt) , Ruthenium (Ru), palladium (Pd), iridium (Ir), rhodium (Rh), osmium (Os), carbon (C), indium (In), WO3, TiO2 and one or more materials selected from the group consisting of conductive polymers It can be formed using.

Electrons in the light absorbing layer 132 are excited through the light absorbed by the light absorbing layer 132, and electrons and holes generated by the electrons 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 absorbing layer 132.

As an optional embodiment, 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. As an optional embodiment, the first charge transfer layer 131 may include a flat metal oxide layer, a metal oxide layer having surface irregularities, a layer formed of a thin film-shaped metal oxide nanostructure, and a porous metal oxide layer or a dense metal oxide Layers may be included.

As a specific example, the first charge transfer layer 131 is specifically, 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 Ti oxide (eg, TiO2).

As an optional embodiment, the second charge transfer layer 133 may be disposed between the second electrode 140 and the light absorbing layer 132.

As an optional embodiment, the second charge transport layer 133 may include a hole transport layer. The second charge transport layer 133 includes a hole transport layer, and specifically includes a hole transport material. For example, one or two or more of thiophene, paraphenylenevinylene, carbazole, and triphenylamine systems Selected materials.

As a specific example, when the second charge transport layer 133 includes a hole transport 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.

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.

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

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

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

The connection area CA may be connected to the separation area BS in at least one area. As an optional embodiment, the connection area CA and the separation area BS may be connected to each other in a 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 cell cells, and the connection area CA may be connected to the separation area BS in one area or in the longitudinal direction as a whole. The active area AA of the cell can be effectively increased to improve the electrical efficiency of the solar cells.

5 is a diagram illustrating an alternative embodiment of FIG. 3. For convenience of description, only the differences 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 greater than the width of the separation area BS. Through this, the 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 area CS between two second electrodes adjacent to each other of the plurality of second electrodes may be formed to be smaller than the width of the connection area CA to which the first electrode and the second electrode are directly connected. While effectively separating each second electrode, an area of connection between the first electrode and the second electrode may be increased to improve contact characteristics and electrical characteristics between the first electrode and the second electrode.

6 is a diagram illustrating another alternative embodiment of FIG. 3. For convenience of description, only the differences 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. As an optional embodiment, the connection area CA and the separation area CS may be connected to each other in a 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 cell cells, and the connection area CA may be connected to the separation area CS in one area or in the longitudinal direction as a whole, through which The active area AA of the cell can be effectively increased to improve the electrical efficiency of the solar cells. In addition, it is possible to prevent or detect the formation of a light absorption region for the intermediate layer in an unnecessary region.

7 is a view showing another alternative embodiment of FIG. 3. For convenience of description, only the differences 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. As an optional embodiment, the connection area CA and the separation area CS may be connected to each other in a 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. As an optional embodiment, the connection area CA and the separation area BS may be connected to each other in a 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 cell cells, and the connection area CA may be connected to the separation area BS in one area or in the longitudinal direction as a whole. The active area AA of the cell can be effectively increased to improve the electrical efficiency of the solar cells.

In addition, the connection region CA may be connected to the separation region CS and in one region or in the entire length direction, thereby effectively increasing the active region AA of each cell to improve the electrical efficiency of the solar cells. You can. In addition, it is possible to prevent or detect the formation of the light absorbing region for the intermediate layer in the unnecessary region.

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

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

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

As an optional embodiment, one first electrode 110 may be formed across the second solar cell C2 and the third solar cell C3.

In addition, the separation region 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 based on an arrangement direction of the second solar cell C2 and the third solar cell C3, and may be formed to be long in a direction intersecting this.

Referring to FIG. 8 as an optional embodiment, the separation area BS may be formed by removing some areas of the first electrode 110 formed on the substrate 101, and the width of the separation area BS is The distance between the one electrode 110 and the first electrode 110 adjacent thereto may be a distance.

As an optional embodiment, the intermediate layer 130 may be formed in the separation region BS, for example, the first charge transfer layer 131 may be disposed. Also, at least one region of the intermediate layer 130 may fill the space of the separation region BS.

Also, the description related to FIG. 8 may be applied to the structures of FIGS. 5 to 7 described above.

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

FIG. 10 is a view showing a modification of FIG. 9, FIG. 11 is a view showing another modification of FIG. 9, and FIG. 12 is a view 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 be spaced apart from the first electrode 110 and one region, and may include an intermediate layer 130 therebetween, which may correspond to the active region AA of FIG. 3.

The active region AA may include a region in which light absorption and flow of holes and electrons are effectively generated.

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 region 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 the first electrode of the active region of one solar cell in one region, and in the other region, the first electrode of another solar cell adjacent thereto through the connection region CA. It can be electrically connected to.

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

The connection area CA may have a width based on the arrangement direction of the second solar cell C2 and the third solar cell C3, and may be formed to be long in a direction intersecting them.

As an optional embodiment, the width of the connection area CA may be formed to be equal to or greater than the width of the separation area BS.

As an optional embodiment, 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. As an optional embodiment, the extension line of the boundary line of one side of the connection area CA may overlap the boundary line of the separation area BS.

Also, the description related to FIG. 9 may be applied to at least the structures of FIGS. 5 and 7 described above.

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

FIG. 11 is a view showing another modification of FIG. 9, and FIG. 12 is a view showing another modification 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 connection area CA toward the substrate 101. It can be big. For example, the boundary line of the side surface of the connection area CA may include a slope. Through this, the second electrode 140 can be easily disposed in the contact hole 130C of the intermediate layer 130.

Also, referring to FIG. 12, the width of the connection region CA is different for each region, and specifically, the width of the region facing the substrate 101 among the regions of the connection region CA is greater than the width of the region far away from the substrate 101. It can be bigger. For example, the boundary line of the side surface of the connection area CA may include a slope. Through this, the contact area between the second electrode 140 and the first electrode 110 may be increased to improve electrical contact characteristics and connection characteristics.

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

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

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

As an optional embodiment, one second electrode 140 corresponds to the second solar cell C2, and the other second electrode 140 adjacent thereto is formed to correspond to the third solar cell C3. You can.

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

The separation region CS may have a width based on an arrangement direction of the second solar cell C2 and the third solar cell C3, and may be formed to be long in a direction intersecting it.

The width of the separation area CS may be a 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.

Referring to FIG. 13 as an optional embodiment, the separation region CS may be formed in a form in which a portion of the second electrode 140 formed on the substrate 101 is removed. Also, a via hole 130H may be formed in the intermediate layer 130 to correspond to the separation region CS.

As an optional embodiment, the width of the separation region CS may be formed to be at least smaller than the width of the connection region CA.

In addition, the separation area CS may be connected to the connection area CA in at least one area, for example, one side of the separation area CS and one side of the connection area CA may be connected to each other. As an optional embodiment, the region corresponding to the entire length of the separation region CS may be connected to the side surface of the connection region CA.

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

15 is a view showing another modification of FIG. 13, and FIG. 16 is a view showing another modification of FIG.

Referring to FIG. 15, the width of the separation region CS is different for each region, and more specifically, the width of the region farther away from the substrate 101 is greater than the width of the region of the separation region CS facing the substrate 101. It can be big. For example, the boundary line of the side surface of the separation region CS may include a slope. Through this, separation of the second electrode 140 through the separation region CS may be facilitated in a region remote from the first electrode 110.

Referring to FIG. 16, the width of the separation region CS is different for each region, and specifically, the width of the region toward the substrate 101 among the regions of the separation region CS is greater than the width of the region far away from the substrate 101. It can be big. For example, the boundary line of the side surface of the separation region CS may include a slope. Through this, separation of the second electrode 140 through the separation region CS in an area adjacent to the first electrode 110 may be facilitated.

17 is a view showing another modification of FIG. 13.

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

In an exemplary embodiment, the connection area CA may be disposed between the separation area BS and the separation area CS based on the plane direction of the substrate 101.

In addition, referring to FIG. 3, the separation area CS and the connection area CA may be spaced apart from each other. For example, based on the plane direction of the substrate 101 or the direction from the second solar cell C2 to the third solar cell C3, the separation region CS and the connection region CA may be disposed between the separation region CS and the connection region CA. There may be two intervals (L2).

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

As an optional embodiment, the width of the connection area CA may have a value greater 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 of the width of the second interval L2. In addition, as an optional embodiment, the width of the connection area CA may have a value of 1.1 to 3.0 times the width of the second interval L2.

Through this, the width of the connection area CA can be easily secured to improve the stability of electrical characteristics between the first electrode 110 and the second electrode 140.

As an optional embodiment, the width of the separation area BS and the separation area CS may have a value greater than the width of the second interval L2, respectively.

In addition, referring to FIG. 6 described above, 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 to the third solar cell C3, the separation between the separation area BS and the connection area CA is performed. There may be 1 gap L1.

In addition, through this, the region of the second electrode 140 corresponding to the connection region CA may be spaced apart from the separation region BS and the first gap L1, and as an optional embodiment, the first gap L1 At least one region of the intermediate layer 130 may be disposed in a region corresponding to.

As an optional embodiment, the width of the connection area CA may have a value greater than the width of the first interval L1.

In addition, as a specific embodiment, the width of the connection area CA may have a value of 1.1 times or more of the width of the first interval L1. In addition, as an optional embodiment, the width of the connection area CA may have a value of 1.1 to 3.0 times the width of the first interval L1.

Through this, the width of the connection area CA can be easily secured to improve the stability of electrical characteristics between the first electrode 110 and the second electrode 140.

As an optional embodiment, the widths of the separation area BS and the separation area CS may each have a value greater than the width of the first interval L1.

18 is a view showing another modification of FIG. 3.

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

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

That is, when a direction from one solar cell to the other solar cell is referred to as a width, and a direction crossing the direction of the width or a direction perpendicular to the width is referred to as a longitudinal direction, in 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 longitudinal direction.

In addition, as an optional embodiment, the separation area BS may be connected to the connection area CA in the entire area based on the longitudinal direction.

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

That is, when a direction from one solar cell to the other solar cell is referred to as a width, and a direction crossing the direction of the width or a direction perpendicular to the width is referred to as a longitudinal direction, in at least one region based on the longitudinal direction The separation area CS may be connected to the connection area CA in one area based on the longitudinal direction.

In addition, as an optional embodiment, the separation area CS may be connected to the connection area CA in the entire area based on the longitudinal direction.

In addition, at this time, the width of the connection area CA may be larger than the width of the separation area CS, and as an optional embodiment, the width of the connection area CA is 1.1 to 3 times the width of the separation area CS. Can have The connection characteristics of the first electrode 110 and the second electrode 140 through the connection region CA may be improved by making the width of the connection region CA larger than the separation region CS. If the width of the connection area CA exceeds 3 times the width of the separation area CS, it may affect the securing of the active area AA, and thus may be 3 times or less.

In addition, as an optional embodiment, the mutual relationship between the width of the connection area CA and the width of the separation area CS may be selectively applied to the aforementioned 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 as an optional embodiment, the width of the connection area CA may have a value of 1.1 to 3 times the width of the separation area BS. Can. The connection characteristics of the first electrode 110 and the second electrode 140 through the connection region CA may be improved by making the width of the connection region CA larger than the separation region BS. When the width of the connection area CA exceeds 3 times the width of the separation area BS, it may affect the securing of the active area AA, and thus may be 3 times or less.

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

The perovskite solar cell module of this embodiment may be able to effectively use the active region through the configuration of the separation region, the connection region, and the separation region adjacent to the active region of each cell. Through this, it is possible to easily enlarge the active region and increase the performance and capacity of the perovskite solar cell module.

The width of the separation region between two first electrodes adjacent to each other of the plurality of first 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 region can be made larger than the width of the separation region. Through this, the first electrode and the second electrode can be effectively spaced apart, thereby increasing the contact area between the first electrode and the second electrode, thereby improving contact characteristics and electrical characteristics between the first electrode and the second electrode.

In addition, the width of the separation region between two second electrodes adjacent to each other 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 region can be made larger than the width of the separation region. Through this, each second electrode is effectively spaced apart, and an area of connection between the first electrode and the second electrode is increased to improve contact characteristics and electrical characteristics between the first electrode and the second electrode.

In addition, by making the width of the connection region larger than the width of the separation region and the separation region, electrical characteristics of the connection between the first electrode and the second electrode can be improved without affecting the width of the active region.

As described above, the present invention has been described with reference to the embodiment shown in the drawings, but this is only exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. . Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

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

In the specification (especially in the claims) of the embodiments, the use of the term “above” and similar indicating terms may correspond to both singular and plural. In addition, in the case where the range is described in the embodiment, as including the invention to which the individual values belonging to the range are applied (if there is no contrary description), it is the same as describing each individual value constituting the range in the detailed description. . Finally, if there is no explicit or contradictory description of steps constituting the method according to the embodiment, the steps may be performed in a suitable order. The embodiments are not necessarily limited to the order in which the steps are described. 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 examples or exemplary terms, unless it is defined by the claims. It is not. In addition, those skilled in the art can recognize that various modifications, combinations, and changes can be configured according to design conditions and factors within the scope of the appended claims or equivalents thereof.

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

Claims (6)

A perovskite solar cell module connected to a plurality of solar cells,
Each of the 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 and including at least a light absorbing layer containing a perovskite-based material,
The first electrode is formed in plural to form a separation region between each of the first electrodes, the second electrode includes a connection region connected to the first electrode in one region, and the second electrode is plural. Is formed to form a separation region between each second electrode,
The connection region is formed to be connected to a separation region or a separation region in at least one region based on an arrangement direction of the plurality of solar cells,
The first electrode includes an edge corresponding to the separation region,
The second electrode is formed on the upper surface of the first electrode in the region corresponding to the connection region and includes a perovskite sun that includes contacting at least one region of an edge corresponding to the spaced region of the first electrode Battery module. According to claim 1,
The connection region and the separation region have a length in a direction crossing the arrangement direction of the plurality of solar cells,
The connection region and the separation region are perovskite solar cell modules formed to be 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 arrangement direction of the plurality of solar cells,
The connection region and the separation region are perovskite solar cell modules formed to be connected to each other in the entire region based on the longitudinal direction. According to claim 1,
The intermediate layer,
A perovskite solar cell module further comprising a charge transfer layer disposed between the light absorbing layer and the first electrode or the light absorbing layer and the second electrode. According to claim 4,
The charge transport layer is a perovskite solar cell module comprising a hole transport layer or an electron transport layer. According to claim 1,
Each solar cell is a perovskite solar cell module including an active region in which the first electrode, the second electrode, and an intermediate layer therebetween overlap.

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