JP2016210962A - Electrode forming composition, electrode manufactured using the same, and solar cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrode forming composition having excellent continuous printability and capable of increasing adhesion force between a substrate and an electrode pattern and improving efficiency and reliability of a solar cell.SOLUTION: An electrode forming composition includes: a conductive powder; a glass frit; and an organic vehicle including an organic binder, a multi-functional (meth)acrylate compound and a solvent. The multi-functional (meth)acrylate compound has a molecular weight from 200 to 500, and is contained in an amount of 0.15 to 2 wt.% based on 100 wt.% of the electrode forming composition.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electrode forming composition, and an electrode and a solar cell produced using the composition.

  A solar cell generates electric energy by using a photoelectric effect of a pn junction that converts sunlight photons into electricity. In the solar cell, a front electrode and a rear electrode are respectively formed on the upper and lower surfaces of a semiconductor wafer or substrate on which a pn junction is formed. In a solar cell, a photoelectric effect of a pn junction is induced by sunlight incident on a semiconductor wafer, and an electron generated therefrom provides a current that flows to the outside through an electrode.

  The electrodes of such a solar cell are formed in a certain pattern on the surface of the wafer by applying, patterning and baking the electrode forming composition.

In order to improve the conversion efficiency of solar cells, contact resistance (Rc) and series resistance (Rs) are minimized by improving the contact with the substrate, and the line width of the screen mask pattern is adjusted to be small with organic matter For example, a method of increasing the short-circuit current (I _sc ) by forming a fine line width is known.

  However, the method of reducing the line width of the electrode pattern using a screen mask may increase the series resistance (Rs) and reduce the continuous printability of the fine pattern.

  The electrode pattern formed on the substrate must be well attached to the substrate in the process where the cells constituting the solar cell are connected to each other with a ribbon and manufactured as a final module, but the electrode pattern peels off the substrate, Failure of conduction may occur and reliability may be reduced.

  Therefore, there is a demand for an electrode forming composition that can improve the adhesion of the electrode pattern while ensuring the printability during the formation of the electrode pattern.

Korean Published Patent No. 10-2009-0128082 Korean Published Patent No. 10-2013-0136725

  The present invention has been made in view of the above points, and an object of the present invention is to improve the efficiency and reliability of a solar cell by increasing the adhesion between a substrate and an electrode pattern, with excellent continuous printability. It is providing the composition for electrode formation which can be made to be made.

  Another object of the present invention is to provide an electrode manufactured using the electrode forming composition.

  Another object is to provide a solar cell including the electrode.

  The above and other objects can all be achieved by the present invention described below.

  One embodiment according to the present invention for solving the above-mentioned problems is a composition for forming an electrode, which comprises a conductive powder, a glass frit, and an organic vehicle containing an organic binder, a polyfunctional (meth) acrylate compound and a solvent. The polyfunctional (meth) acrylate compound has a molecular weight of 200 to 500 and is contained in an amount of 0.15 to 2% by weight with respect to 100% by weight of the electrode forming composition. A composition is provided.

  According to one embodiment of the present invention, the polyfunctional (meth) acrylate compound is selected from the group consisting of di (meth) acrylate compounds, tri (meth) acrylate compounds, tetra (meth) acrylate compounds, and mixtures thereof. Is done.

  According to one embodiment of the present invention, the polyfunctional (meth) acrylate compound is trimethylolpropane tri (meth) acrylate, ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, triethylene glycol di (Meth) acrylate, butanediol di (meth) acrylate, hexanediol di (meth) acrylate, pentaerythritol tri (meth) acrylate, trimethylol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate and mixtures thereof Selected from the group.

  According to an embodiment of the present invention, the polyfunctional (meth) acrylate compound is included in an amount of 0.15 to 2% by weight with respect to 100% by weight of the electrode forming composition.

  According to one embodiment of the present invention, the polyfunctional (meth) acrylate compound has a molecular weight of 250-400.

  According to an embodiment of the present invention, the polyfunctional (meth) acrylate compound can remain in a film formed after heat-treating the electrode forming composition at 200 to 400 ° C.

  According to an embodiment of the present invention, the glass frit is selected from the group consisting of bismuth-based glass frit, lead-based glass frit, and mixtures thereof.

  According to an embodiment of the present invention, the bismuth-based glass frit may be a bismuth (Bi) -tellurium (Te) glass frit.

  According to one embodiment of the present invention, the bismuth (Bi) -tellurium (Te) glass frit contains 20-80 mol% tellurium and 20-80 mol% bismuth in terms of oxide.

  According to an embodiment of the present invention, the composition for forming an electrode includes the conductive powder 60 to 95% by weight; the glass frit 0.5 to 20% by weight; and the organic vehicle 1 to 30% by weight. .

  According to one embodiment of the present invention, the electrode forming composition comprises a surface treatment agent, a dispersant, a thixotropic agent, a plasticizer, a viscosity stabilizer, an antifoaming agent, a pigment, an ultraviolet stabilizer, and an antioxidant. And one or more additives selected from the group consisting of coupling agents.

  Other embodiment of this invention provides the electrode manufactured using the said composition for electrode formation.

  Another embodiment of the present invention provides a solar cell including the electrode.

  The composition for forming an electrode according to the present invention is excellent in continuous printability, and can increase the adhesion between the substrate and the electrode pattern to improve the efficiency of the solar cell.

It is the schematic which showed simply the structure of the solar cell which concerns on one Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains can easily implement the embodiments. However, the present invention can be implemented in a variety of different forms and is not limited to the embodiments described herein.

  In the drawings, the thickness is shown enlarged to clearly represent the various layers and regions. The dimensional ratios in the drawings are exaggerated for convenience of explanation, and may differ from actual ratios. Similar parts are denoted by the same reference numerals throughout the specification, and redundant description is omitted. When a layer, membrane, region, plate, etc. is “on top” of another part, this is not just “on top” of the other part, but also another part in between Including. Conversely, when a certain part is “just above” another part, it means that there is no other part between them.

  One embodiment of the present invention provides an electrode-forming composition comprising a conductive powder, glass frit, and an organic vehicle comprising an organic binder, a polyfunctional (meth) acrylate compound and a solvent.

  The present invention will be described in detail below.

  The composition for electrode formation which is one Embodiment of this invention contains electroconductive powder.

  The electrode forming composition can use metal powder as the conductive powder. The metal powder is silver (Ag), gold (Au), palladium (Pd), platinum (Pt), ruthenium (Ru), rhodium (Rh), osmium (Os), iridium (Ir), rhenium (Re), titanium. (Ti), Niobium (Nb), Tantalum (Ta), Aluminum (Al), Copper (Cu), Nickel (Ni), Molybdenum (Mo), Vanadium (V), Zinc (Zn), Magnesium (Mg), Yttrium (Y), cobalt (Co), zirconium (Zr), iron (Fe), tungsten (W), tin (Sn), chromium (Cr), manganese (Mn), and the like can be included. Of these, silver (Ag) is preferable as the metal powder of the conductive powder.

  The conductive powder may be a powder having a nano-size or micro-size particle size, for example, a conductive powder having a size of several tens to several hundreds of nanometers, a conductive powder having a size of several tens to several tens of micrometers. Two or more conductive powders having different sizes may be mixed and used.

  The conductive powder can have a spherical shape, a plate shape, or an amorphous shape. The average particle diameter (D50) (volume conversion) of the conductive powder is preferably 0.1 μm to 10 μm, more preferably 0.5 μm to 5 μm. The average particle diameter is measured using a 1064LD model manufactured by CILAS after dispersing conductive powder in isopropyl alcohol (IPA) at room temperature (24 ° C. to 25 ° C.) for 3 minutes. If the average particle diameter of the conductive powder is within the above range, the contact resistance and the line resistance can be reduced.

  The conductive powder is preferably contained at 60 to 95% by weight with respect to 100% by weight of the total amount of the electrode forming composition. By containing the conductive powder in the above range, it is possible to prevent the conversion efficiency from being lowered due to the increase in resistance, and to prevent the paste from becoming difficult due to the relative decrease in the amount of the organic vehicle. Can do. More preferably, the conductive powder is contained in an amount of 70 to 90% by weight based on 100% by weight of the total amount of the electrode forming composition.

  The composition for electrode formation which is one Embodiment of this invention contains a glass frit.

  Glass frit is a conductive powder metal in the emitter region that etches the antireflective coating during the firing process of the electrode-forming composition to melt the conductive powder particles and lower the resistance. Crystal particles are generated, the adhesive force between the conductive powder and the wafer is improved, and the effect of lowering the firing temperature by softening during sintering is induced.

  Increasing the area of the solar cell to increase the efficiency of the solar cell can increase the contact resistance of the solar cell, so the damage to the pn junction must be minimized while at the same time minimizing the series resistance. I must. In addition, since the variation range of the firing temperature is increased by increasing the number of wafers having various sheet resistances, it is preferable to use a glass frit that can sufficiently ensure thermal stability even at a wide firing temperature.

  As the glass frit, any one or more of a leaded glass frit and a lead-free glass frit usually used in an electrode forming composition can be used.

  The glass frit is preferably selected from the group consisting of bismuth-based glass frit, lead-based glass frit and mixtures thereof.

  Glass frit consists of lead (Pb), tellurium (Te), bismuth (Bi), lithium (Li), phosphorus (P), germanium (Ge), gallium (Ga), cerium (Ce), iron (Fe), silicon (Si), zinc (Zn), tungsten (W), magnesium (Mg), cesium (Cs), strontium (Sr), molybdenum (Mo), titanium (Ti), tin (Sn), indium (In), vanadium (V), barium (Ba), nickel (Ni), copper (Cu), sodium (Na), potassium (K), arsenic (As), cobalt (Co), zirconium (Zr), manganese (Mn) and aluminum One or more elements selected from (Al) can be included.

  The bismuth-based glass frit is preferably a bismuth (Bi) -tellurium (Te) glass frit.

  The bismuth (Bi) -tellurium (Te) glass frit preferably contains 20-80 mol% tellurium and 20-80 mol% bismuth in terms of oxide. If each component of the bismuth (Bi) -tellurium (Te) glass frit is within the above range, it is possible to simultaneously ensure excellent conversion efficiency (efficiency) of the solar cell and adhesion strength (adhesion strength) of the electrode pattern. .

  The glass frit may be derived from the oxides of the elements described above using conventional methods. For example, it can be obtained by melting a mixture prepared by mixing oxides of the above elements with a specific composition, quenching, and then grinding again. The mixing process may be performed using a ball mill or a planetary mill. The melting step can be performed at 700 ° C. to 1300 ° C., and the quenching step can be performed at room temperature (24 ° C. to 25 ° C.). The pulverization process may be performed by a disk mill, a planetary mill, or the like, but is not limited thereto.

  A glass frit having an average particle diameter (D50) (volume conversion) of 0.1 μm to 10 μm can be used. The glass frit is preferably contained in an amount of 0.5 to 20% by weight based on 100% by weight of the total amount of the electrode forming composition. When the glass frit is contained within the above range, the adhesion strength of the electrode pattern can be improved within a range that does not hinder the electrical characteristics of the electrode. The average particle diameter (D50) is measured using a 1064LD model manufactured by CILAS after dispersing glass frit in a solvent for 3 minutes at room temperature (24 ° C. to 25 ° C.).

  The shape of the glass frit may be spherical or non-shaped. In one embodiment, two glass frits with different transition temperatures may be used. For example, a first glass frit having a transition temperature of 200 ° C. or more and 350 ° C. or less and a second glass frit having a transition temperature exceeding 350 ° C. and not more than 550 ° C. are mixed at a weight ratio of 1: 0.2 to 1: 1. Can be used.

  The composition for electrode formation which is one Embodiment of this invention contains an organic vehicle.

  The organic vehicle imparts viscosity and rheological properties suitable for printing to the electrode forming composition through mechanical mixing with the inorganic components of the electrode forming composition. The organic vehicle includes an organic binder, a polyfunctional (meth) acrylate compound and a solvent.

  As the organic binder, an acrylate-based or cellulose-based resin can be used, and ethyl cellulose is a resin that is generally used. Also, ethyl hydroxyethyl cellulose, nitrocellulose, mixture of ethyl cellulose and phenol resin, alkyd resin, phenol resin, acrylate resin, xylene resin, polybutene resin, polyester resin, urea resin, melamine resin Vinyl acetate resin, wood rosin, alcohol polymethacrylate, and the like can also be used.

  The weight average molecular weight (Mw) of the organic binder is preferably 30,000 to 200,000 g / mol, and more preferably 40,000 to 150,000 g / mol. When the weight average molecular weight (Mw) is within the above range, it is preferable because an excellent effect can be obtained in terms of printability. The weight average molecular weight of the organic binder is a value measured using gel permeation chromatography (GPC).

  A polyfunctional (meth) acrylate compound means a compound having two or more acrylate groups or methacrylate groups. That is, monofunctional (meth) acrylate compounds are excluded in the present invention.

  In the present invention, the polyfunctional (meth) acrylate compound is preferably selected from the group consisting of di (meth) acrylate compounds, tri (meth) acrylate compounds, tetra (meth) acrylate compounds, and mixtures thereof.

  Furthermore, the polyfunctional (meth) acrylate compounds are trimethylolpropane tri (meth) acrylate, ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, butanediol di More selected from the group consisting of (meth) acrylate, hexanediol di (meth) acrylate, pentaerythritol tri (meth) acrylate, trimethylol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate and mixtures thereof. preferable.

  The polyfunctional (meth) acrylate compound preferably has a molecular weight of 200 to 500, more preferably 250 to 400, and still more preferably 250 to 360. If the molecular weight is within the above range, the efficiency can be improved by ensuring good continuous printability and minimizing the increase in series resistance (Rs).

  The polyfunctional (meth) acrylate compound can remain in the film without being thermally cured even after heat treatment at 200 ° C. to 400 ° C. That is, the polyfunctional (meth) acrylate compound remains in the film without being thermally cured by heat treatment, so that the polyfunctional group can play a role of improving the adhesion between the substrate and the pattern.

  That is, a polyfunctional (meth) acrylate compound remains in the film | membrane produced | generated after heat-processing the said composition for electrode formation at 200-400 degreeC.

  The polyfunctional (meth) acrylate compound is contained in an amount of preferably 0.15 to 2% by weight, more preferably 0.2 to 2% by weight with respect to 100% by weight of the electrode forming composition. In the said range, the continuous printability of the composition for electrode formation can be improved, and the adhesive force of an electrode pattern and a board | substrate can be improved.

  Examples of the solvent include hexane, toluene, texanol (registered trademark) (2,2,4-trimethylpentane-1,3-diol monoisobutyrate), methyl cellosolve, ethyl cellosolve, and cyclohexanone. , Butyl cellosolve, aliphatic alcohol, butyl carbitol (diethylene glycol monobutyl ether), dibutyl carbitol (diethylene glycol dibutyl ether), butyl carbitol acetate (diethylene glycol monobutyl ether acetate), propylene glycol monomethyl ether, hexylene glycol, terpineol (Terpineol), methyl ethyl ketone, benzyl alcohol, Gamma butyrolactone, ethyl lactate and the like can be used alone or in combination of two or more.

  The content of the organic vehicle is preferably 1 to 30% by weight and more preferably 5 to 15% by weight with respect to 100% by weight of the total amount of the electrode forming composition. If it is the said range, the adhesive strength of an electrode pattern and a board | substrate can be improved and the outstanding continuous printability can be ensured.

  In addition to the above-described constituent elements, the electrode-forming composition may further contain a conventional additive as necessary in order to improve flow characteristics, process characteristics, and stability. Additives include surface treatment agents, dispersants, thixotropic agents, plasticizers, viscosity stabilizers, antifoaming agents, pigments, UV stabilizers, antioxidants, coupling agents, etc., alone or in combination. Can be used.

  Although an additive may be contained at 0.1 to 5% by weight with respect to 100% by weight of the total amount of the electrode forming composition, the content can be changed as necessary. The content of the additive can be selected in consideration of the printing characteristics, dispersibility, and storage stability of the electrode forming composition.

  According to other embodiment of this invention, the electrode formed using the said composition for electrode formation is provided.

  The electrode can be formed in a certain pattern on the surface of the wafer by applying, patterning and baking the electrode forming composition. The electrode forming composition can be applied by various methods such as screen printing, gravure offset method, rotary screen printing method, lift-off method, but is not limited thereto. The applied electrode forming composition preferably has a certain pattern and a thickness of 10 μm to 40 μm.

  The baking process of the patterned electrode forming composition will be described in detail in the following solar cell manufacturing process.

  Moreover, according to other embodiment of this invention, the solar cell containing the said electrode is provided. A solar cell according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic view schematically showing the structure of a solar cell according to an embodiment of the present invention. In addition, the code | symbol 300 which is an arrow shows the incident direction of light.

  Referring to FIG. 1, an electrode-forming composition is printed and fired on a substrate 100 including a p-layer (or n-layer) 101 and an n-layer (or p-layer) 102 as an emitter, and a rear electrode 210 and A front electrode 230 can be formed. For example, the electrode forming composition may be printed on the rear surface of the substrate 100 and then heat-treated at a temperature of about 200 ° C. to 400 ° C. for about 10 to 60 seconds to perform a preliminary preparation step for the rear electrode. it can. At this time, the polyfunctional (meth) acrylate compound remains in the electrode-forming composition after the heat treatment without being thermally cured.

  In addition, the electrode forming composition may be printed on the front surface of the substrate 100 and then dried to perform a preliminary preparation step for the front electrode. Thereafter, a front electrode and a rear electrode can be formed by performing a baking process of baking at 400 ° C. to 980 ° C., preferably 700 ° C. to 980 ° C. for about 30 seconds to 210 seconds.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, these examples are merely for the purpose of explanation and should not be construed as limiting the present invention.

Examples 1-7 and Comparative Examples 1-11
After sufficiently dissolving an organic binder (ethyl cellulose, Dow chemical company, STD4) (Mw = 50,000 g / mol) and Texanol (registered trademark) (Eastman) at 60 ° C., the average particle size (volume conversion) is 2. 0 μm spherical silver powder (Dowa Hightech Co. LTD AG-5-11F), average particle size is 1.0 μm (volume conversion), Bi-Te lead-free glass powder (ABT-1, manufactured by Asahi Glass Co., Ltd.) , (Meth) acrylate compound, dispersing agent (BYK-chemie, BYK-102) and thixotropic agent (Elementis Co., Thixatrol ST), mixing and dispersing with a three-roll mill, and composition for electrode formation The thing was manufactured.

  ABT-1 manufactured by Asahi Glass Co., Ltd. was used as the Bi-Te lead-free glass powder.

  As the (meth) acrylate compound, the following compound of Miwon Specialty Chemical was used.

(A) Phenol (EO) 4 acrylate (Miramer M4144, molecular weight: 324) of monofunctional acrylate compound,
(B) Polyethylene glycol 200 diacrylate of a bifunctional acrylate compound (Miramer M282, molecular weight: 308),
(C) Pentaerythritol triacrylate of a trifunctional acrylate compound (Miramer M340, molecular weight: 298),
(D) tetrafunctional acrylate compound pentaerythritol tetraacrylate (Miramer M420, molecular weight: 352) and (E) trifunctional acrylate compound trimethylolpropane (EO) 15 (Trimethylolpropane (EO) 15) (Miramer M , Molecular weight: 956).

  The content (% by weight) of each component used is shown in Table 1 below.

Evaluation of Printability of Electrode Pattern After front-printing the electrode-forming composition produced in Examples 1 to 7 and Comparative Examples 1 to 11 on the wafer, the number of line brokens of the printed electrodes was counted with the naked eye, Evaluation was made according to the following criteria. The results are shown in Table 2 below. In addition, what the line of the printed electrode was disconnected was judged as Line Broken.

  5A: 0, 4A: More than 0 and less than 3, 3A: 3 or more and less than 6, 2A: 6 or more and less than 12, 1A: 12 or more and less than 15, and 0A: 15 or more.

Evaluation of Adhesiveness of Electrode Pattern The electrode-forming compositions produced in Examples 1-7 and Comparative Examples 1-11 were printed on the front surface of the wafer so as to form a regular square with a size of 5 cm × 5 cm on a 400 mesh screen. The sample was produced by drying between 300-400 ° C. Based on the evaluation of grid adhesion (ASTM D3359), make 100 grid patterns with cross knife, attach and remove the metal adhesion tape (3M, # 610), and convert the number of grids taken according to the following criteria. The result values were divided. The results are shown in Table 2 below.

  5B: 0%, 4B: more than 0% and less than 5%, 3B: 5% or more and less than 15%, 2B: 15% or more and less than 35%, 1B: 35% or more and less than 65%, and 0B: 65% or more.

  Referring to Table 2, the electrode patterns manufactured with the electrode forming compositions of Comparative Examples 1, 2, 3, 5, 7 and 9 with respect to the electrode patterns manufactured with the electrode forming compositions of Examples 1-7. The adhesive force is not good, and in Comparative Examples 4, 6, 8, 10 and 11, the adhesive force is good, but it is expected that Rs will increase due to insufficient printability and adversely affect the efficiency. The On the other hand, it is judged that the electrode pattern manufactured with the composition for electrode formation of Examples 1-7 ensures sufficient printability, but contributes to efficiency improvement, although it is excellent in adhesive force.

Evaluation of electrical efficiency of solar cell After texturing the front surface of a wafer (a p-type wafer doped with boron), an n + layer is formed with POCl ₃ and silicon nitride (SiNx: H) is formed thereon. The electrode forming compositions produced in Examples 1 to 7 and Comparative Examples 1 to 11 were screen-printed in a predetermined pattern on the front surface of a multicrystalline line wafer formed with an antireflection film, and an infrared drying furnace was used. And dried at a temperature of 300 to 400 ° C. Thereafter, an aluminum paste was printed on the rear surface of the wafer and then dried in the same manner. The cell formed in the above process was baked at a temperature of 400 to 900 ° C. for 30 seconds to 50 seconds using a belt-type baking furnace to manufacture a test cell.

  The electrical characteristics (short circuit current (Isc (A)), fill factor and efficiency) of the manufactured test cell were measured using a solar cell efficiency measurement equipment (Pasan, CT-801). The results are shown in Table 3 below.

  Referring to Table 3, the solar cells manufactured using the electrode forming compositions of Examples 1 to 7 are compared to the solar cells manufactured using the electrode forming compositions of Comparative Examples 1 to 11. , FF and efficiency all showed good values.

  Only variations and modifications of the present invention can be readily implemented by those having ordinary knowledge in the art, and all such variations and modifications are considered to be within the scope of the present invention.

100 substrates,
101 p layer (or n layer),
102 n layer (or p layer),
210 rear electrode,
230 Front electrode,
300 light.

Claims (13)

Conductive powder;
Glass frit,
An organic binder containing an organic binder, a polyfunctional (meth) acrylate compound and a solvent, and an electrode forming composition comprising:
The polyfunctional (meth) acrylate compound has a molecular weight of 200 to 500, and is contained at 0.15 to 2% by weight with respect to 100% by weight of the electrode forming composition.   The electrode according to claim 1, wherein the polyfunctional (meth) acrylate compound is selected from the group consisting of a di (meth) acrylate compound, a tri (meth) acrylate compound, a tetra (meth) acrylate compound, and a mixture thereof. Forming composition.   The polyfunctional (meth) acrylate compound includes trimethylolpropane tri (meth) acrylate, ethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, butanediol di (meth) 2) selected from the group consisting of acrylate), hexanediol di (meth) acrylate, pentaerythritol tri (meth) acrylate, trimethylol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate and mixtures thereof. 2. The composition for forming an electrode according to 2.   The electrode according to any one of claims 1 to 3, wherein the polyfunctional (meth) acrylate compound is contained in an amount of 0.2 to 2 wt% with respect to 100 wt% of the electrode forming composition. Forming composition.   The composition for electrode formation according to any one of claims 1 to 4, wherein the polyfunctional (meth) acrylate compound has a molecular weight of 250 to 400.   The said polyfunctional (meth) acrylate compound remains in the film | membrane produced | generated after heat-processing the said composition for electrode formation at 200-400 degreeC, The any one of Claims 1-5. Electrode forming composition.   The composition for forming an electrode according to any one of claims 1 to 6, wherein the glass frit is selected from the group consisting of a bismuth glass frit, a lead glass frit, and a mixture thereof.   The composition for forming an electrode according to claim 7, wherein the bismuth-based glass frit is a bismuth (Bi) -tellurium (Te) glass frit.   The composition for forming an electrode according to claim 8, wherein the bismuth (Bi) -tellurium (Te) glass frit is a glass frit containing 20 to 80 mol% tellurium and 20 to 80 mol% bismuth in terms of oxide.   The electrode forming composition includes 60 to 95% by weight of the conductive powder; 0.5 to 20% by weight of the glass frit; and 1 to 30% by weight of the organic vehicle. The composition for electrode formation as described in the item.   The electrode forming composition is selected from the group consisting of a surface treatment agent, a dispersant, a thixotropic agent, a plasticizer, a viscosity stabilizer, an antifoaming agent, a pigment, an ultraviolet stabilizer, an antioxidant, and a coupling agent. The composition for forming an electrode according to any one of claims 1 to 10, further comprising one or more additives.   The electrode manufactured using the composition for electrode formation of any one of Claims 1-11.   A solar cell comprising the electrode according to claim 12.