KR101914385B1 - Silicon solar cell and manufacturing method for the same - Google Patents

Abstract

The present invention relates to a silicon solar cell with high energy conversion efficiency in a wide wavelength range and a manufacturing method technology thereof. The silicon solar cell includes a coating layer including an iridium complex represented by a chemical formula 1 and a polymer.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for manufacturing a silicon solar cell and a silicon solar cell,

The present invention relates to a manufacturing method of a silicon solar cell and a silicon solar cell, and more particularly, to a silicon solar cell including a coating layer and a method of manufacturing the silicon solar cell.

Solar cells are photoelectric conversion devices that convert solar energy directly into electricity. They are largely divided into inorganic solar cells and organic solar cells. As a representative example of an inorganic solar cell, there is a silicon solar cell.

Since its first development in 1976, the silicon (Si) solar cell has been widely used as a solar cell because of its high photosensitivity in the visible region of hydrogenated silicon (Si: H), easy control of optical band gap, Low-temperature, large-area processability.

In recent years, various researches have been conducted on a technique of combining optical bandgap using various materials or expanding a wavelength region having high energy conversion efficiency in order to improve the efficiency of a silicon solar cell.

However, the development of effective materials for improving the energy conversion efficiency of silicon solar cells over a wide wavelength range and the development of techniques for appropriately introducing the materials into silicon solar cells have not yet been solved, The efficiency improvement and commercialization have been limited.

The object of the present invention is to develop an iridium complex which is a material of suitable material capable of improving the light absorption efficiency of a silicon solar cell in a wide wavelength range and to introduce the developed iridium complex into a coating layer of a silicon solar cell To thereby provide a high-efficiency silicon solar cell having a high energy conversion efficiency in a wide wavelength range.

The silicon solar cell of the present invention comprises an iridium complex; And a coating layer comprising a polymer.

[Chemical Formula 1]

(Wherein R ₁ to R ₄ are the same or different and each is hydrogen, deuterium, halogen, hydroxy, cyano, a substituted or unsubstituted C ₁ to C ₄₀ alkyl group, a substituted or unsubstituted C ₂ - C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, substituted or non-substituted of unsubstituted ring of ring A C ₆ to C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ to C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, a substituted or unsubstituted C ₃ to C ₄₀ A cycloalkyl group having 3 to 40 carbon atoms, or a substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms, or is bonded to an adjacent group to form a substituted or unsubstituted C ₆ to C ₄₀ condensed ring, and R ₅ to R ₈ Are each independently hydrogen, deuterium, halogen, hydroxy, cyano, Ring or unsubstituted C ₁ ~ C ₄₀ alkyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ of the alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ ~ alkyloxy group of C ₄₀ of a, substituted or unsubstituted A substituted or unsubstituted C ₃ to C ₄₀ cycloalkyl group, a substituted or unsubstituted C ₃ to C ₄₀ heterocycloalkyl group, and R ₉ to R ₁₂ are selected from the group consisting of a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, Substituted or unsubstituted C ₁ to C ₄₀ alkyl, substituted or unsubstituted C ₂ to C ₄₀ alkenyl, substituted or unsubstituted aryl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, C for ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or 5 to 40 carbon atoms in the Interrogating an aryl group, a substituted or unsubstituted C ₆ ~ C ₄₀ of the aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ alkyloxy group, the substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted Or an unsubstituted C ₃ -C ₄₀ cycloalkyl group, or a substituted or unsubstituted C 3 -C 40 heterocycloalkyl group.

According to an embodiment of the present invention, the formula 1 may include at least one selected from the group consisting of the following formulas (2) to (4).

(Wherein R ₅ to R ₈ are the same or different from each other and each represents hydrogen, deuterium, halogen, hydroxy, cyano, substituted or unsubstituted C ₁ to C ₄₀ alkyl, substituted or unsubstituted C ₂ - C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, substituted or non-substituted of unsubstituted ring of ring A C ₆ to C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ to C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, a substituted or unsubstituted C ₃ to C ₄₀ A substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms,

R ₉ to R ₁₂ are the same or different and each independently represent hydrogen, deuterium, halogen, hydroxy, cyano, a substituted or unsubstituted C ₁ to C ₄₀ alkyl group, a substituted or unsubstituted C ₂ to C ₄₀ Substituted or unsubstituted C ₂ -C ₄₀ alkynyl group, substituted or unsubstituted C ₆ -C ₄₀ aryl group, substituted or unsubstituted C 5 -C 40 heteroaryl group, substituted or unsubstituted C ₆ -C 40 alkynyl group, C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted or unsubstituted C ₃ ~ cycloalkyl group of C ₄₀ of the , A substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms.

According to an embodiment of the present invention, the formula 1 may include one or more selected from the group consisting of formulas (5) to (7).

Wherein A is halogen or hydrogen and B is hydroxy or hydrogen.

According to one embodiment of the present invention, the A may be fluorine (F).

According to an embodiment of the present invention, the iridium complex may be amphoteric.

According to an embodiment of the present invention, the iridium complex may emit light of any one color selected from the group consisting of red, orange, green, and blue.

According to an embodiment of the present invention, the coating layer may further comprise at least one polymer selected from the group consisting of PEO, PMMA, and PEG.

According to an embodiment of the present invention, the mixing weight ratio (weight of iridium composite: weight of polymer) of the iridium complex and the polymer in the coating layer may be 1: 0.5 to 1: 2.0.

According to an embodiment of the present invention, the thickness of the coating layer may be 0.05 μm to 0.2 μm.

A method of manufacturing a silicon solar cell according to the present invention includes the steps of: preparing a silicon solar cell; Forming a coating layer on the silicon solar cell with a coating solution containing an iridium complex; And drying the silicon solar cell having the coating layer formed thereon.

According to an embodiment of the present invention, the iridium complex may be represented by the following formula (1).

[Chemical Formula 1]

(Wherein R ₁ to R ₄ are the same or different and each is hydrogen, deuterium, halogen, hydroxy, cyano, a substituted or unsubstituted C ₁ to C ₄₀ alkyl group, a substituted or unsubstituted C ₂ - C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, substituted or non-substituted of unsubstituted ring of ring A C ₆ to C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ to C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, a substituted or unsubstituted C ₃ to C ₄₀ A cycloalkyl group having 3 to 40 carbon atoms, or a substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms, or is bonded to an adjacent group to form a substituted or unsubstituted C ₆ to C ₄₀ condensed ring, and R ₅ to R ₈ Are each independently hydrogen, deuterium, halogen, hydroxy, cyano, Ring or unsubstituted C ₁ ~ C ₄₀ alkyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ of the alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ ~ alkyloxy group of C ₄₀ of a, substituted or unsubstituted A substituted or unsubstituted C ₃ to C ₄₀ cycloalkyl group, a substituted or unsubstituted C ₃ to C ₄₀ heterocycloalkyl group, and R ₉ to R ₁₂ are selected from the group consisting of a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, Substituted or unsubstituted C ₁ to C ₄₀ alkyl, substituted or unsubstituted C ₂ to C ₄₀ alkenyl, substituted or unsubstituted aryl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, C for ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or 5 to 40 carbon atoms in the Interrogating an aryl group, a substituted or unsubstituted C ₆ ~ C ₄₀ of the aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ alkyloxy group, the substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted Or an unsubstituted C ₃ -C ₄₀ cycloalkyl group, or a substituted or unsubstituted C 3 -C 40 heterocycloalkyl group.

According to an embodiment of the present invention, the formula 1 may include at least one selected from the group consisting of the following formulas (2) to (4).

(Wherein R ₅ to R ₈ are the same or different and each independently represent hydrogen, deuterium, halogen, hydroxy, cyano, substituted or unsubstituted C ₁ to C ₄₀ alkyl group, substituted or unsubstituted C ₂ to C ₄₀ the alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ of the alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, a C ₆ unsubstituted or substituted in the ring ~ C ₄₀ of the aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ of the alkyloxy group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted or unsubstituted C of ₃ ~ C ₄₀ cycloalkyl An alkyl group, a substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms,

R ₉ to R ₁₂ are the same or different and each independently represent hydrogen, deuterium, halogen, hydroxy, cyano, a substituted or unsubstituted C ₁ to C ₄₀ alkyl group, a substituted or unsubstituted C ₂ to C ₄₀ Substituted or unsubstituted C ₂ -C ₄₀ alkynyl group, substituted or unsubstituted C ₆ -C ₄₀ aryl group, substituted or unsubstituted C 5 -C 40 heteroaryl group, substituted or unsubstituted C ₆ -C 40 alkynyl group, C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted or unsubstituted C ₃ ~ C ₄₀ cycloalkyl group of , A substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms.

According to an embodiment of the present invention, the formula 1 may include one or more selected from the group consisting of formulas (5) to (7).

Wherein A is halogen or hydrogen and B is hydroxy or hydrogen.

According to an embodiment of the present invention, the concentration of the iridium complex in the coating solution may be 0.05 mg / ml to 1.0 mg / ml.

According to an embodiment of the present invention, the step of forming the coating layer may include spraying the coating solution to form a coating layer.

According to one embodiment of the present invention, the spraying method may be one using an ultrasonic jetting nozzle.

According to an embodiment of the present invention, the coating solution may be sprayed at a rate of 0.05 ml / min to 0.2 ml / min.

According to an embodiment of the present invention, the step of forming the coating layer may be performed in a nitrogen gas atmosphere or an inert gas atmosphere.

According to an embodiment of the present invention, the coating solution may further comprise at least one polymer selected from the group consisting of PEO, PMMA, and PEG.

According to an embodiment of the present invention, the drying may be performed at a temperature of 80 ° C to 140 ° C for 10 minutes to 30 minutes.

The silicon solar cell provided in the embodiment of the present invention can realize the effect of increasing the energy transfer efficiency of the silicon solar cell by forming the coating layer including the iridium complex. In particular, the silicon solar cell provided in the embodiment of the present invention has an effect of greatly increasing the external quantum efficiency (EQE) at a relatively low wavelength region band of about 450 nm or less, Can also be expected.

According to another embodiment of the present invention, there is provided a method of effectively forming a coating layer containing an iridium complex so as to have a higher intensity of light (PL intensity) in a wide wavelength region A silicon solar cell with improved energy conversion efficiency can be manufactured.

FIG. 1 is a flowchart sequentially showing processes of respective steps of a method for manufacturing a silicon solar cell according to an embodiment of the present invention.
FIG. 2 is a schematic view illustrating a process of forming a coating layer in a method of manufacturing a silicon solar cell according to an embodiment of the present invention. FIG.
3 is a graph comparing current densities measured according to voltages of the silicon solar cells manufactured in Examples of the present invention and Comparative Example 1. FIG.
4 is a graph comparing external quantum efficiencies (EQE) according to wavelengths of the silicon solar cells manufactured in Examples and Comparative Example 1 of the present invention.
5 to 7 are graphs showing the relationship between the wavelengths of silicon solar cells manufactured in Examples (Ir-orange, Ir-Green, Ir-Blue) of the present invention and Comparative Example 2 (Ir-orange, Ir-Green and Ir- (Au) according to the measurement results.
8 is a low-resolution SEM photograph of the surface of a coating layer of a silicon solar cell including an Ir-orange coating layer manufactured as an example of the present invention.
9 is a low-resolution SEM photograph of the surface of the coating layer of the silicon solar cell including the Ir-orange coating layer prepared in Comparative Example 2. Fig.
10 is a high-resolution SEM photograph of the surface of a coating layer of a silicon solar cell including an Ir-orange coating layer manufactured as an example of the present invention.
11 is an enlarged photograph of a high-resolution SEM photograph of the surface of a coating layer of a silicon solar cell including an Ir-orange coating layer manufactured as an example of the present invention.
FIG. 12 is an XRD pattern photograph of a silicon solar cell manufactured in Examples (Ir-Orange) and Comparative Example 2 (Ir-Orange) of the present invention.
Fig. 13 is an XRD pattern photograph of a silicon solar cell manufactured in an embodiment (Ir-blue) of the present invention and a comparative example 2 (Ir-blue).

In the following, embodiments will be described in detail with reference to the accompanying drawings. Like reference symbols in the drawings denote like elements.

Various modifications may be made to the embodiments described below. It is to be understood that the embodiments described below are not intended to limit the embodiments, but include all modifications, equivalents, and alternatives to them.

The terms used in the examples are used only to illustrate specific embodiments and are not intended to limit the embodiments. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this embodiment belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the embodiments, a detailed description of related arts will be omitted if it is determined that the gist of the embodiments may be unnecessarily blurred.

Silicon solar cells have been recognized as having higher potential for commercialization due to their relatively higher energy conversion efficiency than organic solar cells. In recent years, various researches have been conducted on a technology capable of combining an optical bandgap using various materials or expanding a wavelength region having a high energy conversion efficiency in order to further improve the efficiency of a silicon solar cell.

Techniques to extend the light absorption range of the light absorbing spectrum in silicon solar cells can be important in improving the efficiency of silicon solar cells. A single donor material that can be applied thereto has a limited amount of photocurrent generation and a narrow absorption range in absorption of sunlight. Therefore, the present inventor has developed a new material based on a multi-donor material and an energy transfer system using the same . Previous work on this subject has focused on polymer-based systems, but since polymers can exhibit different crystallinity and energy levels, it has been difficult to design effective materials that can be applied to such systems. That is, it has been difficult to ensure efficient charge or energy transfer by adding a specific polymer.

The inventors of the present invention developed an iridium composite material, which is an energy transfer material applicable to both high and low crystalline amorphous and highy crystalline polymer materials, to improve the performance of a silicon solar cell. Energy transmission system.

Compared with conventional singlet-singlet energy delivery systems. The triplet system of the iridium complex developed and applied in the present invention has advantages such as a larger Stokes shift, a longer diffusion length and a reduced charge recombination to prevent self-quenching. Hereinafter, the iridium complex developed in the present invention will be described in detail.

In one aspect of the present invention, there is provided an iridium complex which can be included in an organic solar cell to improve the efficiency of a silicon solar cell.

According to an aspect of the present invention, there is provided a silicon solar cell in which a polymer coating layer including a newly developed iridium complex is formed on a silicon solar cell, thereby significantly improving energy conversion efficiency.

The silicon solar cell of the present invention comprises an iridium complex; And a coating layer comprising a polymer.

[Chemical Formula 1]

(Wherein R ₁ to R ₄ are the same or different and each is hydrogen, deuterium, halogen, hydroxy, cyano, a substituted or unsubstituted C ₁ to C ₄₀ alkyl group, a substituted or unsubstituted C ₂ - C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, substituted or non-substituted of unsubstituted ring of ring A C ₆ to C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ to C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, a substituted or unsubstituted C ₃ to C ₄₀ A cycloalkyl group having 3 to 40 carbon atoms, or a substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms, or is bonded to an adjacent group to form a substituted or unsubstituted C ₆ to C ₄₀ condensed ring, and R ₅ to R ₈ Are each independently hydrogen, deuterium, halogen, hydroxy, cyano, Ring or unsubstituted C ₁ ~ C ₄₀ alkyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ of the alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ ~ alkyloxy group of C ₄₀ of a, substituted or unsubstituted A substituted or unsubstituted C ₃ to C ₄₀ cycloalkyl group, a substituted or unsubstituted C ₃ to C ₄₀ heterocycloalkyl group, and R ₉ to R ₁₂ are selected from the group consisting of a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, Substituted or unsubstituted C ₁ to C ₄₀ alkyl, substituted or unsubstituted C ₂ to C ₄₀ alkenyl, substituted or unsubstituted aryl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, C for ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or 5 to 40 carbon atoms in the Interrogating an aryl group, a substituted or unsubstituted C ₆ ~ C ₄₀ of the aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ alkyloxy group, the substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted Or an unsubstituted C ₃ -C ₄₀ cycloalkyl group, or a substituted or unsubstituted C 3 -C 40 heterocycloalkyl group.

The heteroatom of the heterocycloalkyl group may be any one selected from the group consisting of N, S, and O. Wherein the substituted is selected from hydrogen, deuterium, halogen, hydroxy, cyano, substituted or unsubstituted C ₁ ~ C ₄₀ alkyl group, an alkenyl group, a substituted or unsubstituted substituted or unsubstituted C ₂ ~ C ₄₀ of the ring C ₂ ~ C ₄₀ alkynyl group, and the like.

The iridium complex for a silicon solar cell provided by the present invention uses iridium as a central atom. The iridium complex has a long diffusion length and thus has a long exciton lifetime, which ultimately has an effect of increasing energy transfer efficiency (nET).

For efficient energy transfer in silicon solar cells, it is necessary to have different absorption ranges between energy donors and energy receivers, efficient spectral overlap between energy donors and energy receivers, and energy donor design with energy levels wider than the energy levels of the energy acceptors . The iridium complex of the present invention may be a material that satisfies these conditions.

The iridium complex materials developed in the present invention may have a characteristic of exhibiting? -Π ^* ligand center transformation at a wavelength lower than 450 nm in the film state.

According to an embodiment of the present invention, the formula 1 may include at least one selected from the group consisting of the following formulas (2) to (4).

(Wherein R ₅ to R ₈ are the same or different from each other and each represents hydrogen, deuterium, halogen, hydroxy, cyano, substituted or unsubstituted C ₁ to C ₄₀ alkyl, substituted or unsubstituted C ₂ - C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, substituted or non-substituted of unsubstituted ring of ring A C ₆ to C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ to C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, a substituted or unsubstituted C ₃ to C ₄₀ A substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms,

R ₉ to R ₁₂ are the same or different and each independently represent hydrogen, deuterium, halogen, hydroxy, cyano, a substituted or unsubstituted C ₁ to C ₄₀ alkyl group, a substituted or unsubstituted C ₂ to C ₄₀ Substituted or unsubstituted C ₂ -C ₄₀ alkynyl group, substituted or unsubstituted C ₆ -C ₄₀ aryl group, substituted or unsubstituted C 5 -C 40 heteroaryl group, substituted or unsubstituted C ₆ -C 40 alkynyl group, C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted or unsubstituted C ₃ ~ cycloalkyl group of C ₄₀ of the , A substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms.

According to an embodiment of the present invention, the formula 1 may include one or more selected from the group consisting of formulas (5) to (7).

Wherein A is halogen or hydrogen and B is hydroxy or hydrogen.

According to one embodiment of the present invention, the A may be fluorine (F).

According to an embodiment of the present invention, the iridium complex may be amphoteric.

As an example, the iridium complex of the present invention may be included in a coating layer on a silicon solar cell to effectively enhance energy transfer efficiency.

According to an embodiment of the present invention, the iridium complex may emit light of any one color selected from the group consisting of red, orange, green, and blue.

The ligand materials used in the present invention may be materials that realize high quantum efficiency (QY) when combined with iridium which is a center metal. In the present invention, various ligand materials can be combined with iridium, a central metal, to control the absorption and release characteristics of the iridium complex.

As an example, the iridium complex may be one that emits light of a color in the visible light region and may be referred to herein as Ir-red, Ir-orange, Ir-green and Ir-blue for convenience. The above iridium complexes exhibited an MLCT of about 350 nm to 480 nm, and the corresponding maximum emission peak (λmax) value was found to be about 450 nm to 620 nm.

In the iridium complex of the present invention, the degree of spectral overlapping, which is one of the important factors for efficient energy transfer, can be formed to follow the order of Ir-Red> Ir-Orange> Ir-Green> Ir-Blue.

In the iridium complex of the present invention, another important factor for efficient energy transfer, QY value, is CH ₂ Cl ₂ Ir-blue > Ir-red > Ir-green order.

As an example, the iridium complex may be applied to an organic layer including an amorphous active polymer and a highly crystalline active material of a solar cell to improve energy transfer efficiency.

The iridium complex developed in the present invention can be applied to a solar cell including an amorphous active polymer, for example, a PTB7 polymer as an energy donor, and a solar cell including a high crystalline active polymer such as a P3HT polymer as an energy donor .

According to an embodiment of the present invention, the coating layer may further comprise at least one polymer selected from the group consisting of PEO, PMMA, and PEG.

The polymer included in the coating layer of the present invention can provide a gap between the iridium complexes to prevent self-quenching between the complex molecules.

According to an embodiment of the present invention, the mixing weight ratio (weight of iridium composite: weight of polymer) of the iridium complex and the polymer in the coating layer may be 1: 0.5 to 1: 2.0.

If the mixing ratio by weight of the polymer is less than 1: 0.5 based on the iridium complex, the self-quenching of the iridium complex may occur severely and the light transmission effect may be poor. If the ratio is more than 1: 2.0, There may be a problem that the absolute light transmission amount becomes insufficient.

According to an embodiment of the present invention, the thickness of the coating layer may be 0.05 μm to 0.2 μm.

If the thickness of the coating layer is less than 0.05 탆, there is a problem that the uniformity of the coating layer is limited. If the thickness is more than 0.2 탆, there is a problem of blocking the light coming into the silicon solar cell device excessively .

Hereinafter, some of the ligands selected and designed to be bonded to the iridium metal, which is a central metal, are used in the process of preparing an embodiment of the iridium complex of the present invention.

[Reaction Scheme 1]

According to another aspect of the present invention, there is provided a method of manufacturing a silicon solar cell including the iridium complex.

FIG. 1 is a flowchart sequentially showing processes of respective steps of a method for manufacturing a silicon solar cell according to an embodiment of the present invention. Hereinafter, each step of the method for manufacturing a silicon solar cell according to an embodiment of the present invention will be described in detail with reference to FIG.

A method of manufacturing a silicon solar cell according to the present invention includes the steps of: preparing a silicon solar cell; Forming a coating layer on the silicon solar cell with a coating solution containing an iridium complex; And drying the silicon solar cell having the coating layer formed thereon.

The method for manufacturing a silicon solar cell provided in the present invention is characterized in that it comprises a structure for forming a coating layer with a coating solution containing an iridium complex.

FIG. 2 is a schematic view illustrating a process of forming a coating layer in a method of manufacturing a silicon solar cell according to an embodiment of the present invention. FIG.

One example of the present invention may include a step of forming a coating layer on the surface of a silicon solar cell by using an ultrasonic nozzle with a solution containing an iridium complex solution and a polymer.

According to one embodiment of the method for producing a silicon solar cell of the present invention, the iridium complex may be represented by the following formula (1).

[Chemical Formula 1]

(Wherein R ₁ to R ₄ are the same or different and each is hydrogen, deuterium, halogen, hydroxy, cyano, a substituted or unsubstituted C ₁ to C ₄₀ alkyl group, a substituted or unsubstituted C ₂ - C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, substituted or non-substituted of unsubstituted ring of ring A C ₆ to C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ to C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, a substituted or unsubstituted C ₃ to C ₄₀ A cycloalkyl group having 3 to 40 carbon atoms, or a substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms, or is bonded to an adjacent group to form a substituted or unsubstituted C ₆ to C ₄₀ condensed ring, and R ₅ to R ₈ Are each independently hydrogen, deuterium, halogen, hydroxy, cyano, Ring or unsubstituted C ₁ ~ C ₄₀ alkyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ of the alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ ~ alkyloxy group of C ₄₀ of a, substituted or unsubstituted A substituted or unsubstituted C ₃ to C ₄₀ cycloalkyl group, a substituted or unsubstituted C ₃ to C ₄₀ heterocycloalkyl group, and R ₉ to R ₁₂ are selected from the group consisting of a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, Substituted or unsubstituted C ₁ to C ₄₀ alkyl, substituted or unsubstituted C ₂ to C ₄₀ alkenyl, substituted or unsubstituted aryl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, C for ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or 5 to 40 carbon atoms in the Interrogating an aryl group, a substituted or unsubstituted C ₆ ~ C ₄₀ of the aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ alkyloxy group, the substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted Or an unsubstituted C ₃ -C ₄₀ cycloalkyl group, or a substituted or unsubstituted C 3 -C 40 heterocycloalkyl group.

According to one embodiment of the method for producing a silicon solar cell of the present invention, the formula 1 may include at least one selected from the group consisting of the following formulas (2) to (4).

(Wherein R ₅ to R ₈ are the same or different and each independently represent hydrogen, deuterium, halogen, hydroxy, cyano, substituted or unsubstituted C ₁ to C ₄₀ alkyl group, substituted or unsubstituted C ₂ to C ₄₀ the alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ of the alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, a C ₆ unsubstituted or substituted in the ring ~ C ₄₀ of the aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ of the alkyloxy group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted or unsubstituted C of ₃ ~ C ₄₀ cycloalkyl An alkyl group, a substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms,

R ₉ to R ₁₂ are the same or different and each independently represent hydrogen, deuterium, halogen, hydroxy, cyano, a substituted or unsubstituted C ₁ to C ₄₀ alkyl group, a substituted or unsubstituted C ₂ to C ₄₀ Substituted or unsubstituted C ₂ -C ₄₀ alkynyl group, substituted or unsubstituted C ₆ -C ₄₀ aryl group, substituted or unsubstituted C 5 -C 40 heteroaryl group, substituted or unsubstituted C ₆ -C 40 alkynyl group, C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted or unsubstituted C ₃ ~ C ₄₀ cycloalkyl group of , A substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms.

According to an embodiment of the method for producing a silicon solar cell of the present invention, the formula 1 may include at least one selected from the group consisting of formulas (5) to (7).

Wherein A is halogen or hydrogen and B is hydroxy or hydrogen.

According to an embodiment of the method for producing a silicon solar cell of the present invention, the concentration of the iridium complex in the coating solution may be 0.05 mg / ml to 1.0 mg / ml. If the concentration of the iridium complex in the coating solution is less than 0.05 mg / ml, there is a problem that the process time becomes excessively long in the process of forming the coating layer. When the concentration exceeds 1.0 mg / ml, the iridium complex precipitates due to the high concentration There may be problems.

According to an embodiment of the method for manufacturing a silicon solar cell of the present invention, the step of forming the coating layer may include spraying the coating solution to form a coating layer. When the spraying method is used, the thickness of the coating layer can be more precisely formed by repetitive spray cycles as compared with the method using spin coating, and there is an advantage that the area of the coating layer is large. As an example, when the coating layer is formed using the spraying method of the iridium complex of the present invention, an additional high crystalline peak can be confirmed on the XRD pattern as compared with forming a coating layer using spin coating.

According to an embodiment of the method of manufacturing a silicon solar cell of the present invention, the spraying method may be one using an ultrasonic jetting nozzle. When an ultrasonic jet nozzle is used, it is possible to spray fine particles to form a uniform thin film, and it is also possible to obtain a coating layer having high crystallinity. As an example, the frequency of the ultrasonic jet nozzle may be 50 kHz to 200 kHz. The frequency of the ultrasonic jet nozzle may preferably be 120 kHz to 180 kHz.

According to one embodiment of the method for producing a silicon solar cell of the present invention, the coating solution may be sprayed at a rate of 0.05 ml / min to 0.2 ml / min. If the coating solution is sprayed at a rate of less than 0.05 ml / min, the process speed may become slow and the productivity may be lowered. If the coating solution is sprayed at a rate of more than 0.2 ml / min, There may arise a problem that it is difficult to form a uniformly dispersed coating layer.

According to an embodiment of the method for manufacturing a silicon solar cell of the present invention, the step of forming the coating layer may be performed in a nitrogen gas atmosphere or an inert gas atmosphere.

According to one embodiment of the method for producing a silicon solar cell of the present invention, the coating solution may further comprise at least one polymer selected from the group consisting of PEO, PMMA, and PEG. The polymer included in the coating layer of the present invention can provide a gap between the iridium complexes to prevent self-quenching between the complex molecules.

According to one embodiment of the method for manufacturing a silicon solar cell of the present invention, the drying step may be performed at a temperature of 80 to 140 ° C for 10 to 30 minutes. If the drying step is carried out at a temperature lower than 80 캜, the coating layer may not be sufficiently dried to the inside, and when the drying is performed at a temperature higher than 140 캜, a crack may be formed on the surface.

As the drying step is performed, the coating layer of the present invention can be stably fixed on the surface of the silicon solar cell.

Example

Preparation of iridium complex

As solvent 2 - methoxy ethanol and water: 1 (v / v) using a mixed solvent mixture in a volume ratio for 24 hours _{IrCl 3 · nH 2 O (200} mg, 0.67 mmol) and 1-phenyl-isoquinoline (412 mg, 2.00 mmol) were refluxed. The mixture thus prepared was cooled to room temperature and more water was added to precipitate the product. The precipitate was filtered and washed three times with hexane to give the product (355 mg, 83% yield). 300 mg (0.24 mmol) of the synthesized product was dissolved in a mixture of 100 mg (0.72 mmol) of 3-hydroxypicolinic acid and 254 mg (2.40 mmol) of sodium carbonate in an inert solvent for 10-12 hours Lt; / RTI > The mixture was then cooled to room temperature and the solvent was evaporated. It was dissolved in a mixture of methylene chloride and then was washed with water, dried over MgSO _4. The solvent was evaporated to give the product which was purified by silica gel column chromatography to give the final product (238 mg, 367% yield). The finally formed iridium complex showed the characteristics of Ir-red.

Other examples of the present invention using other ligands in a similar procedure are Ir-Orange ((2pq) ₂ Irpic-OH), Ir-Green ((ppy) ₂ Irpic-OH), Ir- Iridium complexes were synthesized.

The molecular formulas of the synthesized materials are as follows.

Manufacture of silicon solar cell

A silicon solar cell was fabricated and the coating layer was formed on the surface using the iridium complex prepared above. At this time, the Ir-red, Ir-orange, Ir-green and Ir-blue complexes were dissolved in a chloroform solvent at a concentration of 0.5 mg / ml to form four kinds of iridium complex solutions.

The PEO polymer was dissolved in chloroform at a concentration of 0.5 mg / ml to form a PEO polymer solution.

Each of the iridium complex solution and the PEO polymer solution was mixed and sprayed on the surface of the silicon solar cell at a frequency of 120 kHz in an ultrasonic jet nozzle in a nitrogen gas atmosphere to form a coating layer. Thereafter, the resultant was dried at 100 DEG C for 15 minutes to obtain a silicon solar cell according to an embodiment of the present invention.

As a comparative example 1 for comparison with the embodiment of the present invention, a silicon solar cell was manufactured in the same manner except for the step of forming a coating layer containing an iridium complex.

As Comparative Example 2 for comparison with the embodiment of the present invention, a silicon solar cell was manufactured in the same manner except that a coating layer was formed by a spin coating method.

The improved efficiency of the organic solar cell was measured in various ways according to the embodiments of the present invention and Comparative Example 1 thus manufactured.

[Table 1] below is a table showing values obtained by measuring the energy conversion efficiency of the organic solar cell manufactured in the above example of the present invention and the comparative example by various methods.

Jsc (mA / cm ² ) Voc (mV) Fill factor (%) Efficiency (%) Comparative Example 1 34.4 588 76.6 15.5 Example 1
(Ir-Red) 36.5 588 76.5 16.4 Example 2
(Ir-orange) 36.2 588 76.5 16.3 Example 3
(Ir-Blue) 35.9 588 76.5 16.2 Example 4
(Ir-green) 36.0 588 76.5 16.2

As shown in Table 1, in the case of the embodiment of the present invention in which the coating layer is formed, a higher Jsc value and a higher energy conversion efficiency can be secured as compared with the comparative example not including the coating layer, And it was confirmed that it was maintained at a level equivalent to that in the case where the coating layer was not formed.

3 is a graph comparing current densities measured according to voltages of the silicon solar cells manufactured in Examples of the present invention and Comparative Example 1. FIG.

4 is a graph comparing external quantum efficiencies (EQE) according to wavelengths of the silicon solar cells manufactured in Examples and Comparative Example 1 of the present invention.

3 and 4, it was confirmed that the embodiment of the present invention in which the coating layer is formed has higher current density and higher external quantum efficiency than the comparative example not including the coating layer.

5 to 7 are graphs showing the relationship between the wavelengths of silicon solar cells manufactured in Examples (Ir-orange, Ir-Green, Ir-Blue) of the present invention and Comparative Example 2 (Ir-orange, Ir-Green and Ir- (Au) according to the measurement results.

5 to 7, the silicon solar cell of the present invention in which the coating layer was formed by spraying method had a higher PL intensity value than the silicon solar cell of Comparative Example 2 in which the coating layer was formed by the spin coating method Can be confirmed.

8 is a low-resolution SEM photograph of the surface of a coating layer of a silicon solar cell including an Ir-orange coating layer manufactured as an example of the present invention.

9 is a low-resolution SEM photograph of the surface of the coating layer of the silicon solar cell including the Ir-orange coating layer prepared in Comparative Example 2. Fig.

10 is a high-resolution SEM photograph of the surface of a coating layer of a silicon solar cell including an Ir-orange coating layer manufactured as an example of the present invention.

11 is an enlarged photograph of a high-resolution SEM photograph of the surface of a coating layer of a silicon solar cell including an Ir-orange coating layer manufactured as an example of the present invention.

In the case of the coating layer formed using the spraying method of the embodiment of the present invention, the specific surface area was increased in the process of forming the surface particles, and the light scattering effect and the self-quenching effect were prevented I can get the effect. On the other hand, it was confirmed that the coating layer formed by the spin coating method manufactured in Comparative Example 2 of the present invention was not able to realize the above effects, and thus the performance was deteriorated.

FIG. 12 is an XRD pattern photograph of a silicon solar cell manufactured in Examples (Ir-Orange) and Comparative Example 2 (Ir-Orange) of the present invention.

Fig. 13 is an XRD pattern photograph of a silicon solar cell manufactured in an embodiment (Ir-blue) of the present invention and a comparative example 2 (Ir-blue).

When the coating layer was formed using the spraying method of the iridium complex of the present invention, an additional high crystalline peak was observed on the XRD pattern as compared with the coating layer formed by spin coating.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, if the techniques described are performed in a different order than the described methods, and / or if the described components are combined or combined in other ways than the described methods, or are replaced or substituted by other components or equivalents Appropriate results can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

10: Iridium complex solution moving tube
20: polymer solution moving tube
110: ultrasonic nozzle

Claims (20)

An iridium complex represented by the following formula 1; And a coating layer comprising a polymer,
Wherein the coating layer further comprises at least one polymer selected from the group consisting of PEO, PMMA and PEG.
Silicon solar cell.
[Chemical Formula 1]

(Wherein R ₁ to R ₄ are the same or different and each is hydrogen, deuterium, halogen, hydroxy, cyano, a substituted or unsubstituted C ₁ to C ₄₀ alkyl group, a substituted or unsubstituted C ₂ - C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, substituted or non-substituted of unsubstituted ring of ring A C ₆ to C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ to C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, a substituted or unsubstituted C ₃ to C ₄₀ A cycloalkyl group having 3 to 40 carbon atoms, or a substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms, or is bonded to an adjacent group to form a substituted or unsubstituted C ₆ to C ₄₀ condensed ring, and R ₅ to R ₈ Are each independently hydrogen, deuterium, halogen, hydroxy, cyano, Ring or unsubstituted C ₁ ~ C ₄₀ alkyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ of the alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ ~ alkyloxy group of C ₄₀ of a, substituted or unsubstituted A substituted or unsubstituted C ₃ to C ₄₀ cycloalkyl group, a substituted or unsubstituted C ₃ to C ₄₀ heterocycloalkyl group, and R ₉ to R ₁₂ are selected from the group consisting of a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, Substituted or unsubstituted C ₁ to C ₄₀ alkyl, substituted or unsubstituted C ₂ to C ₄₀ alkenyl, substituted or unsubstituted aryl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, C for ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or 5 to 40 carbon atoms in the Interrogating an aryl group, a substituted or unsubstituted C ₆ ~ C ₄₀ of the aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ alkyloxy group, the substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted Or an unsubstituted C ₃ -C ₄₀ cycloalkyl group, or a substituted or unsubstituted C 3 -C 40 heterocycloalkyl group.
The method according to claim 1,
Wherein the formula (1) comprises at least one member selected from the group consisting of formulas (2) to (4)
Silicon solar cell.

(Wherein R ₅ to R ₈ are the same or different and each independently represent hydrogen, deuterium, halogen, hydroxy, cyano, substituted or unsubstituted C ₁ to C ₄₀ alkyl group, substituted or unsubstituted C ₂ to C ₄₀ the alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ of the alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, a C ₆ unsubstituted or substituted in the ring ~ C ₄₀ of the aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ of the alkyloxy group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted or unsubstituted C of ₃ ~ C ₄₀ cycloalkyl An alkyl group, a substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms,
R ₉ to R ₁₂ are the same or different and each independently represent hydrogen, deuterium, halogen, hydroxy, cyano, a substituted or unsubstituted C ₁ to C ₄₀ alkyl group, a substituted or unsubstituted C ₂ to C ₄₀ Substituted or unsubstituted C ₂ -C ₄₀ alkynyl group, substituted or unsubstituted C ₆ -C ₄₀ aryl group, substituted or unsubstituted C 5 -C 40 heteroaryl group, substituted or unsubstituted C ₆ -C 40 alkynyl group, C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted or unsubstituted C ₃ ~ C ₄₀ cycloalkyl group of , A substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms.
The method according to claim 1,
Wherein the formula (1) comprises at least one member selected from the group consisting of formulas (5) to (7).
Silicon solar cell.

(Wherein A is a halogen atom or H, and B is a hydroxyl group or H.)
The method of claim 3,
Wherein A is fluorine (F).
Silicon solar cell.
The method according to claim 1,
Wherein the iridium complex is amphoteric.
Silicon solar cell.
The method according to claim 1,
Wherein the iridium complex emits light of any one color selected from the group consisting of red, orange, green and blue.
Silicon solar cell.
delete The method according to claim 1,
Wherein the mixing ratio by weight of the iridium complex and the polymer in the coating layer (weight of iridium composite: polymer weight) is 1: 0.5 to 1: 2.0.
Silicon solar cell.
The method according to claim 1,
Wherein the thickness of the coating layer is 0.05 mu m to 0.2 mu m.
Silicon solar cell.
Preparing a silicon solar cell;
Forming a coating layer on the silicon solar cell with a coating solution containing an iridium complex; And
And drying the silicon solar cell having the coating layer formed thereon,
Wherein the coating solution further comprises at least one polymer selected from the group consisting of PEO, PMMA and PEG.
A method of manufacturing a silicon solar cell.
11. The method of claim 10,
Wherein the iridium complex is represented by the following formula (1)
A method of manufacturing a silicon solar cell.
[Chemical Formula 1]

(Wherein R ₁ to R ₄ are the same or different and each is hydrogen, deuterium, halogen, hydroxy, cyano, a substituted or unsubstituted C ₁ to C ₄₀ alkyl group, a substituted or unsubstituted C ₂ - C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, substituted or non-substituted of unsubstituted ring of ring A C ₆ to C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ to C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, a substituted or unsubstituted C ₃ to C ₄₀ A cycloalkyl group having 3 to 40 carbon atoms, or a substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms, or is bonded to an adjacent group to form a substituted or unsubstituted C ₆ to C ₄₀ condensed ring, and R ₅ to R ₈ Are each independently hydrogen, deuterium, halogen, hydroxy, cyano, Ring or unsubstituted C ₁ ~ C ₄₀ alkyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ of the alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ ~ alkyloxy group of C ₄₀ of a, substituted or unsubstituted A substituted or unsubstituted C ₃ to C ₄₀ cycloalkyl group, a substituted or unsubstituted C ₃ to C ₄₀ heterocycloalkyl group, and R ₉ to R ₁₂ are selected from the group consisting of a substituted or unsubstituted C ₆ to C ₄₀ arylamine group, Substituted or unsubstituted C ₁ to C ₄₀ alkyl, substituted or unsubstituted C ₂ to C ₄₀ alkenyl, substituted or unsubstituted aryl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, C for ₂ ~ C ₄₀ alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or 5 to 40 carbon atoms in the Interrogating an aryl group, a substituted or unsubstituted C ₆ ~ C ₄₀ of the aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ alkyloxy group, the substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted Or an unsubstituted C ₃ -C ₄₀ cycloalkyl group, or a substituted or unsubstituted C 3 -C 40 heterocycloalkyl group.
12. The method of claim 11,
Wherein the formula (1) comprises at least one member selected from the group consisting of formulas (2) to (4)
A method of manufacturing a silicon solar cell.

(Wherein R ₅ to R ₈ are the same or different and each independently represent hydrogen, deuterium, halogen, hydroxy, cyano, substituted or unsubstituted C ₁ to C ₄₀ alkyl group, substituted or unsubstituted C ₂ to C ₄₀ the alkenyl group, a substituted or unsubstituted C ₂ ~ C ₄₀ of the alkynyl group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl group, a substituted or having 5 to 40 heteroaryl group, a C ₆ unsubstituted or substituted in the ring ~ C ₄₀ of the aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ of the alkyloxy group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted or unsubstituted C of ₃ ~ C ₄₀ cycloalkyl An alkyl group, a substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms,
R ₉ to R ₁₂ are the same or different and each independently represent hydrogen, deuterium, halogen, hydroxy, cyano, a substituted or unsubstituted C ₁ to C ₄₀ alkyl group, a substituted or unsubstituted C ₂ to C ₄₀ Substituted or unsubstituted C ₂ -C ₄₀ alkynyl group, substituted or unsubstituted C ₆ -C ₄₀ aryl group, substituted or unsubstituted C 5 -C 40 heteroaryl group, substituted or unsubstituted C ₆ -C 40 alkynyl group, C ₄₀ aryloxy group, a substituted or unsubstituted C ₁ ~ C ₄₀ alkyloxy group, a substituted or unsubstituted C ₆ ~ C ₄₀ aryl amine group, a substituted or unsubstituted C ₃ ~ C ₄₀ cycloalkyl group of , A substituted or unsubstituted heterocycloalkyl group having 3 to 40 carbon atoms.
12. The method of claim 11,
Wherein the formula (1) comprises at least one member selected from the group consisting of formulas (5) to (7).
A method of manufacturing a silicon solar cell.

(Wherein A is a halogen atom or H, and B is a hydroxyl group or H.)
11. The method of claim 10,
Wherein the concentration of the iridium complex of the coating solution is 0.05 mg / ml to 1.0 mg / ml.
A method of manufacturing a silicon solar cell.
11. The method of claim 10,
Wherein the coating layer is formed by spraying the coating solution to form a coating layer.
A method of manufacturing a silicon solar cell.
16. The method of claim 15,
Wherein the spraying method uses an ultrasonic jetting nozzle,
A method of manufacturing a silicon solar cell.
16. The method of claim 15,
Wherein the coating solution is sprayed at a rate of 0.05 ml / min to 0.2 ml / min.
A method of manufacturing a silicon solar cell.
16. The method of claim 15,
Wherein the forming of the coating layer is performed in a nitrogen gas or inert gas atmosphere.
A method of manufacturing a silicon solar cell.
delete 12. The method of claim 11,
Wherein the drying step is carried out at a temperature of from 80 DEG C to 140 DEG C for 10 minutes to 30 minutes.
A method of manufacturing a silicon solar cell.

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