KR101434028B1 - Method for fabricating organic photovoltaic module with improved performance by partition and organic photovoltaic module fabricated thereby - Google Patents

Abstract

The present invention discloses a method of manufacturing an organic photoelectric conversion module with improved performance through element division and an organic photoelectric conversion module manufactured by this method. According to the present invention, there is provided a method of manufacturing an organic photoelectric conversion module, comprising: forming a longitudinal split pattern structure having a predetermined length-width ratio of a transparent electrode on a transparent substrate; Forming an electrode protection / charge collection layer on the transparent electrode on which the longitudinal split pattern structure is formed; Forming a p-n type polymer nanocomposite structure on the electrode protecting / charge collecting layer; And depositing a metal electrode on the p-n type polymer nanocomposite structure.

Description

TECHNICAL FIELD The present invention relates to a method for fabricating an organic photoelectric conversion module having improved performance through device division, and a method for fabricating the organic photoelectric conversion module using the organic photovoltaic module.

The present invention relates to a method of manufacturing an organic photoelectric conversion module with improved performance through element division and an organic photoelectric conversion module manufactured by the method.

48, 183, 1986), which is the first solar cell to have a photoelectric conversion efficiency of 1% by Tang in 1986 (CW Tang, Appl . Phys . Lett . However, due to the inherent characteristics of organic materials, the development of the technology has been delayed and it has not been put to practical use. Since the beginning of 2000, the photovoltaic conversion efficiency has been dramatically increased, To a state close to that.

Basically, p-type semiconductors have very low electron mobility compared to inorganic materials and have to undergo exciton step in which the formation of charge has binding energy. Therefore, in order to overcome the exciton binding energy, p-type and n- It should be done through heterogeneous bonding.

As a result of continuous technology development, a device having photoelectric conversion efficiency of about 2.5% was reported in 2001 by mixing poly (3-hexylthiophene), P3HT, and fullerene, which are conductive polymers, in 2001 (SE Shaheen, et al . , Appl . Phys . Lett ., 78: 841, 2001). A large number of studies have been conducted to fabricate an organic thin film solar cell using the above mixture. In 2003, a device having a photoelectric conversion efficiency of about 3.5% (F. Padinger, et al . , Adv . Funct . Mater . 13: 85, 2003). In 2005, an organic thin film solar cell with a photoelectric conversion efficiency of 5% was developed by changing the mixing ratio of the previously known P3HT and fullerene and increasing the charge mobility by heat treatment (W. Ma, et al . , Adv . Funct . Mater . 15: 1617, 2005). In recent years, Japanese companies (Mitsubishi Chemical: 10%, Heliatec: 9.8%) have come up with 10% unit devices.

As described above, the organic thin film solar cell using the polymer now has advantage that the device can be manufactured by a simple spin coating using the high processability of the polymer. Therefore, the solar cell can be considered as a future type solar cell due to its simplicity, flexibility, And many research and development are underway.

However, in fact, these organic polymers have a very high electrical resistance because they have semiconducting properties, and the series resistance is increased when the area of the device is increased (B. Kippelen, et al ., Appl. . Phys Lett 89:.. 233516 , 2006) , as well shown in the greater the area of the device series resistance is increased to fall efficiency is deteriorated or the fill factor.

In order to obtain an output similar to the currently used power supply (ie, battery or charger) in an organic thin film solar cell, multiple cells must be connected in series and modulated. Accordingly, in the large-area module, the lateral series resistance which affects each other in other parts of the device connected with the same organic semiconductor increases, the total series resistance of the device increases, the shunt resistance becomes worse, Thereby reducing the electrical output of the device and reducing the conversion efficiency.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art as described above, and it is an object of the present invention to provide an organic solar battery module capable of realizing a large area of an organic solar battery module, minimizing a reduction in a curve factor thereof, And a method for manufacturing the organic photoelectric conversion module.

In order to achieve the above object, according to a preferred embodiment of the present invention, there is provided a method of manufacturing an organic photoelectric conversion module, comprising: forming a longitudinal split pattern structure having a predetermined length-width ratio of a transparent electrode on a transparent substrate step; Forming an electrode protection / charge collection layer on the transparent electrode on which the longitudinal split pattern structure is formed; Forming a p-n type polymer nanocomposite structure on the electrode protecting / charge collecting layer; And depositing a metal electrode on the p-n type polymer nanocomposite structure.

The device length to width ratio can have various ranges.

However, the device length to width ratio is preferably 15 to 20.

The transparent substrate may be selected from the group consisting of glass, quartz, transparent plastic such as PET (polyethylene terephthalate) and polyethersulfone.

The transparent electrode may include a transparent conducting oxide (TCO) of indium tin oxide (ITO), indium zinc oxide (IZO), and aluminum-doped zinc oxide, Polyethylene dioxythiophene (PEDOT), polyaniline, and polypyrrole.

The electrode protection / charge collection layer may be formed from a group consisting of a metal oxide (MoOx) such as molybdenum oxide, polyethylene dioxythiophene (PEDOT), polystyrenesulfonate (PSS), polyaniline and polypyrrole Can be selected.

In the pn type polymer nanocomposite structure, the p-type polymer may be selected from the group consisting of polythiophene and derivatives thereof, poly (para-phenylene) and derivatives thereof, polyfluorene and derivatives thereof, and polyacetylene and derivatives thereof have.

In the pn-type polymer nanocomposite structure, the n-type polymer may include C60 fullerene, fullerene of C70 fullerene, 3,4,9,10-perylenetetracarboxylic bisbenzimidazole (3,4,9,10-perylenetetracarboxylic bisbenzimidazole , ≪ / RTI > PTCBI), and derivatives thereof.

The metal electrode may be selected from the group consisting of aluminum, magnesium, lithium, calcium, copper, silver, gold, platinum and alloys thereof.

According to another aspect of the present invention, there is provided a liquid crystal display comprising: a transparent substrate; A transparent electrode formed on the transparent substrate, the transparent electrode being divided longitudinally in a predetermined length-width ratio; An electrode protection / charge collection layer formed on the vertically divided transparent electrode; A p-n type polymer nanocomposite structure formed on the electrode protection / charge collection layer; And a metal electrode formed on the p-n type polymer nanocomposite structure.

According to the present invention, it is possible to maximize the shunt resistance of a device through element division in the module and to minimize the decrease of the curve factor due to the large-sized, thereby maintaining the maximum photoelectric conversion efficiency even if the organic photoelectric conversion module is implemented in a large area have.

Also, according to the present invention, the produced organic photoelectric conversion module can be very usefully used as a solar cell or an optical sensor.

Furthermore, by using the length-to-width ratio proposed in the present invention, not only the optimum photoelectric conversion efficiency of the module can be obtained, but also the maximum effective area can be maintained in a given module space, thereby obtaining the best current extraction.

In addition, according to the present invention, since the fabrication process of the device does not require a special process such as high temperature and vacuum, there is an advantage that it can be very usefully utilized in the fabrication and development of a next generation large area flat panel organic solar cell device.

1 is a flowchart illustrating a process of manufacturing an organic photoelectric conversion module according to a preferred embodiment of the present invention.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an organic photoelectric conversion module.
FIG. 3A is a schematic view of an organic photoelectric conversion module formed in a longitudinal division of a device having a wide width according to an embodiment of the present invention, and FIG. 3B is a schematic diagram of an organic photoelectric conversion module formed according to an existing method.
4 is a graph comparing current-voltage characteristics of an organic photoelectric conversion module according to an embodiment of the present invention and an organic photoelectric conversion module formed according to an existing method.
FIGS. 5A, 5B, and 5C are schematic views of an organic photoelectric conversion module formed by longitudinal division (two-division and six-division) and an organic photoelectric conversion module formed according to an existing method according to an embodiment of the present invention.
FIG. 6A is a current-voltage characteristic result of an organic photoelectric conversion module formed of a device having a narrow width according to a conventional method, and FIG. 6B is a graph showing a result of a longitudinal division 6 is a diagram showing the result of current-voltage characteristics of the organic photoelectric conversion module formed by the method of FIG.
Figure 7 shows the length-to-width ratio of the device as a function of the shunt resistance.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In order to facilitate a thorough understanding of the present invention, the same reference numerals are used for the same means regardless of the number of the drawings.

The present invention provides an organic photoelectric conversion module that exhibits improved photoelectric conversion efficiency by improving the shunt resistance between devices by minimizing the number of curves caused by the large-sized surface area by longitudinally dividing the device by introducing a split pattern structure into the solar cell module do.

The method for fabricating an organic photoelectric conversion module according to the present invention is a technology that dramatically advances the technology for fabricating an organic solar cell and can be applied to any material. It is a conventional technology for inserting a metal line having a small resistance into the device Unlike the technology, it introduces a subdivision structure into a module using techniques such as coating, printing, and lithography, minimizing the increase of the shunt resistance and curve factor between each device, .

1 is a view illustrating a manufacturing process of an organic photoelectric conversion module according to a preferred embodiment of the present invention.

As shown in FIG. 1, the organic photoelectric conversion module manufacturing process according to the present invention includes a step of forming a longitudinal split pattern structure (step 100), an electrode protection / charge collection layer forming step (step 102) Step 104) and a metal electrode deposition step (step 106).

Step 100 is a step of forming a longitudinally divided pattern structure of the transparent electrode on the transparent substrate so that the in-module device is divided into smaller areas.

According to a preferred embodiment of the present invention, an optimum ratio is provided by adjusting the element length to the element width at various ratios.

The transparent substrate usable in this embodiment may be one of glass, quartz, transparent plastic such as PET (polyethylene terephthalate) or polyethersulfone.

The transparent electrode may be formed of a transparent conducting oxide (TCO) such as indium tin oxide (ITO), indium zinc oxide (IZO) or aluminum-doped zinc oxide ), Polyethylene dioxythiophene (PEDOT), polyaniline or polypyrrole, and the like.

Step 102 is a step of forming an electrode protection / charge collection layer on the longitudinally divided pattern structure of the transparent electrode formed in step 100, wherein the electrode protection / charge collection layer is formed by spin coating, vacuum thermal deposition, imprinting imprinting, inkjet printing, or the like.

In this embodiment, molybdenum oxide (MoO _x ), polyethylene dioxythiophene (PEDOT): polystyrenesulfonate (PSS), polyaniline or polypyrrole is used as the electrode protection / charge collection layer to enable efficient charge collection. Etc. may be used.

Step 104 is a step of forming an organic material functioning as a photoelectric conversion active layer on the electrode protecting / charge collecting layer, and the pn type heterojunction structure is formed of a p-type organic material and an n-type organic material in a continuous interpenetrating network structure .

At this time, the p-type organic material (polymer) according to the present invention may be one of polythiophene and derivatives thereof, poly (para-phenylene) and derivatives thereof, polyfluorene and derivatives thereof, polyacetylene and derivatives thereof.

The n-type organic material (polymer) may include fullerene such as C60 fullerene and C70 fullerene, 3,4,9,10-perylenetetracarboxylic bisbenzimidazole, PTCBI ) And organic derivatives thereof and derivatives thereof.

According to a preferred embodiment of the present invention, the poly (3-hexylthiophene), P3HT and the fullerene derivative (PCBM: [6,6] -phenyl C ₆₁ -butyric acid methyl ester) And then heat treatment is performed to form a dual-staged interpenetrating network-type polymer composite membrane having a well-defined charge transfer path.

Step 106 is a step of depositing a metal electrode on the p-n type organic active layer, in which a metal electrode is deposited through a pre-designed mask so as to constitute a series connection of the device.

As the metal electrode according to the present invention, aluminum, magnesium, lithium, calcium, copper, silver, gold, platinum or an alloy thereof may be used, but the present invention is not limited thereto.

As described above, according to the present invention, in the process of manufacturing a conventional organic photoelectric conversion module, an element connected in series is vertically divided so that each divided element operates independently from other divided elements, thereby increasing the shunt resistance And minimizing the reduction of the curve factor, thereby improving the photoelectric conversion efficiency of the module.

The polymer exhibits improved internal quantum efficiency due to an increase in charge mobility even when the external voltage is low, and it is possible to manufacture a device using a coating or printing technique at room temperature because of its excellent processability. In addition to being easy to fabricate a large-area device, it is flexible, has a variety of advantages such as low cost of fabricating a device, and enables bandgap control through molecular design, and thus it is widely regarded as a material of a next generation photoelectric conversion device .

In order to increase the photoelectric conversion efficiency of the organic thin film solar cell, the following conditions must be satisfied.

 First, the optical absorption of the photoelectric device should be high. This is because it is easy to generate charges as the excitons are heavily produced by absorbing a lot of light.

Second, the charge separation ability at the p-n interface, that is, the electron-hole separation capability, must be large. Since excitons can be separated into electrons and holes only near the pn interface, excitons must be formed in the photoactive region near the interface, and the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital), the generated excitons can overcome the exciton binding energy and be separated into electrons and holes. In addition, if the generated electrons and holes do not move, they are recombined with the exciton again, so that recombination of electrons and holes should be prevented through smooth transport of generated charges.

Third, it is necessary to prevent the accumulation of one kind of charge in the device through equal transport of electrons and holes. In particular, since most of the polymers have a charge mobility significantly lower than that of an inorganic material, a smooth migration path must be secured, and a charge of one type is not accumulated in the device because the mobility of electrons or holes is similar.

In addition, if the charge is well transferred to the electrode, holes or electrons are not accumulated in the device, so that a large load is not applied to the device, and the lifetime of the device can be prolonged. In the case of organic / inorganic or low molecular / polymeric heterojunctions, the p and n materials are preferably polymers having similar charge mobility since they have different transport mechanisms and exhibit different mobility. It is also preferred that ohmic contact be made between the device material and the metal electrode material so that the charge has less resistance to movement to the electrode.

As mentioned above, the use of the polymer blend can be advantageous in that a large-area device can be easily fabricated by spin-coating a sample of the solution to form a mutually-penetrating network-type polymer composite membrane on a dual- Is progressing actively.

As described in the present invention, when the p-n junction type dual-phase interpenetrating network polymer composite film is formed, the resolution of the excitons generated by the light absorption increases due to the increase of the p-n junction interface.

In addition, since the p-type and n-type polymers are connected to the respective necessary electrodes, it is easy to move the generated electrons or holes to the electrodes, thereby increasing the photoelectric efficiency and preventing recombination with the exciton again can do. In addition, the charge can be prevented from being accumulated in the device due to the smooth transport through the secured charge transfer path, so that no load is applied to the device, thereby prolonging the lifetime of the device.

Recently, a technique for obtaining improved photoelectric conversion efficiency is to spin-coat a conductive polymer (P3HT) and a fullerene derivative (PCBM: [6,6] -phenyl C ₆₁ -butyric acid methyl ester) at an optimal blending ratio, This is a method for forming a dual-phase interfacial network-type polymer composite membrane having a well-defined charge transfer path. However, the conventional method of fabricating the large-area module by inserting the conductive polymer-fullerene blend between the transparent electrode and the metal electrode, which exhibits the twin-stranded interpenetrating network structure, And thus the generated electric charge flow is disturbed. In particular, as the area of the device increases, the photoelectric conversion efficiency is reduced.

Due to such a phenomenon, a high shunt resistance and a fill factor are indispensably required in order to achieve a high photoelectric conversion efficiency when the organic photoelectric conversion module is manufactured by the above method.

According to a preferred embodiment of the present invention, the interior of the device connected in series is vertically divided to divide the device into a small area, and then an electrode protection / charge collection layer is formed to enable better charge collection in each divided device .

Thus, the lateral series resistance between the elements works independently of each other, so that no interference phenomenon is caused with respect to the current output of each other. By minimizing the shunt resistance and maximizing the shunt resistance, the organic photoelectric conversion Modules may be provided.

In addition, since the organic photoelectric conversion module according to the present invention is capable of processing using a solution at room temperature and does not include a particularly complicated process, a high temperature process required in a dye-sensitized organic / inorganic hybrid nanoparticle system Do not ask. With such a structure, a flexible, ultra-thin photoelectric material having a high quantum efficiency can be developed and used as a solar cell or an optical sensor.

FIG. 2 illustrates an organic photoelectric conversion module according to a preferred embodiment of the present invention, in which elements connected in series in a module are formed with a vertical split pattern structure.

2, the organic photoelectric conversion module according to the present invention includes an auxiliary electrode 200 for current extraction, a vertically divided transparent electrode 202, an electrode protection / charge collection layer 204, a photoelectric conversion active layer 206, and a metal electrode 208. In this embodiment,

Here, the transparent electrode 202 may be ITO and the electrode protection / charge collection layer 204 may be molybdenum oxide (MoOx).

FIG. 3A is a view showing an organic photoelectric conversion module in which devices are longitudinally divided according to an embodiment of the present invention, and FIG. 3B is a schematic view of an organic photoelectric conversion module formed according to an existing method.

4 is a graph comparing current-voltage characteristics of an organic photoelectric conversion module formed by device division according to the present invention and an organic photoelectric conversion module formed according to a conventional method.

As shown in FIG. 4, it can be seen that the organic photoelectric conversion module according to the present invention exhibits a photoelectric conversion efficiency up to 44% higher than that of the conventional organic photoelectric conversion module.

Hereinafter, the present invention will be described in more detail with reference to Examples. It is to be understood by those skilled in the art that these embodiments are only for describing the present invention in more detail and that the scope of the present invention is not limited by these embodiments in accordance with the gist of the present invention .

< Example  1> Wide device width (8 mm ) Production of split organic photoelectric conversion module

As shown in FIG. 3A, the organic photoelectric conversion module in which devices are divided longitudinally (8 mm) and the organic photoelectric conversion module formed in accordance with the conventional method, as shown in FIG. 3B, are performed as follows Respectively.

The width of each device connected in series within the module is 8 mm. At this time, the organic photoelectric conversion module was manufactured by spin-coating a P3HT / PCBM blend, which is a representative organic blend forming a twin-stranded interpenetrating network structure, on a transparent electrode and then vacuum-depositing aluminum as an electrode for collecting electrons.

)을 하여 전극보호/전하수집층을 형성하였다. 이때 몰리브덴옥사이드의 두께는 30 nm 였다. 이 후 250℃ 질소환경에서 몰리브덴옥사이드층을 열처리하였다.First, ITO, which is a transparent electrode, was divided into desired shapes through a photolithography process on a 10 × 10 cm ITO glass having a sheet resistance of 8 Ω / □. The separated ITO glass was washed with chloroform, isopropyl alcohol and acetone, and then subjected to O ₂ plasma treatment for 15 minutes to remove residual organic matter. Molybdenum oxide was thermally evaporated (deposition rate: 1) in the vacuum state of 7 X 10 &lt; ^{-7 &}

) To form an electrode protection / charge collection layer. The thickness of the molybdenum oxide was 30 nm. Thereafter, the molybdenum oxide layer was heat-treated at 250 ° C in a nitrogen atmosphere.

P3HT [poly (3-hexylthiophene)] and PCBM ([6,6] -phenyl C ₆₁ -butyric acid methyl ester) were mixed at a weight ratio of 1: 0.6 and dissolved in monochlorobenzene to prepare 2.4 wt% of pn Type polymer blend. The pn-type polymer blend was spin-coated on molybdenum oxide-coated ITO glass at 1000 rpm and pre-annealed at 150 ° C for about 10 minutes to form a 220 nm thick pn-type polymer as a photoelectric conversion active layer Nanocomposite structure was formed.

LiF was vacuum deposited on the ITO glass having the pn-type polymer nanocomposite structure to form an organic material protective layer having a thickness of 0.8 nm, followed by vacuum deposition of aluminum thereon to form a metal electrode with a thickness of 150 nm. Post-annealing was performed for about 10 minutes to fabricate an organic photoelectric conversion module.

As a comparative group, the organic photoelectric conversion module manufactured according to the conventional method was formed on the same module according to the same procedure except that the ITO layer was divided through photolithography.

< Example  2> Wide device width (8 mm Analysis of Characteristics of Organic Photoelectric Conversion Modules

The current-voltage (IV) characteristic of the organic photoelectric conversion module manufactured by the above method was measured using a Keithley 2400 source-measure unit. The result was compared with FIG. 4 Respectively.

In this case, a 300 W Xe lamp was used as the light source, and an air mass filter of AM 1.5 of Oriel was used to emit a neutral density filter ) Was used to adjust the intensity of the light.

The selective wavelength was measured using an ARC 150 monochromator of Oriel, and the intensity of the dimming was measured using a calibrated broadband optical power meter (Spectra Physics model 404).

As shown in FIG. 4, the effective area of the organic photoelectric conversion module manufactured by the conventional method is 22.8 cm ² , the open circuit voltage is 2.5862 V, the short circuit current density is 1.161 mA / ㎠, a fill factor of 0.32814, and a photoelectric conversion efficiency of 0.98524%. On the other hand, as shown in FIG. 4, the organic photoelectric conversion module in which devices are longitudinally divided according to the present invention has a short circuit voltage of effective area of 21.6 cm ² , 2.7178 V, a current density per unit area of 1.230 mA / Curve factor, and photoelectric conversion efficiency of 1.1213%.

From the above results, it can be seen that the organic photoelectric conversion module in which the device is divided longitudinally according to the present invention shows a photoelectric conversion efficiency as high as about 15% as compared with the conventional organic photoelectric conversion device under the same conditions.

< Example  3> narrow device width (3.7 mm ) Manufacture of organic photoelectric conversion module

As shown in FIGS. 5A to 5C, the organic photoelectric conversion module in which the width of the device is narrow and divided according to the method of the present invention and the organic photoelectric conversion module formed according to the conventional method were manufactured by the same process as in Example 1 .

The width of each device connected in series within the module is 3.7 mm. As shown in FIG. 5, an auxiliary electrode for current extraction is deposited in the middle of the module in consideration of the smooth drop extraction and the stacking space of the device relative to the entire width of the module.

In order to investigate the influence of device longitudinal division on the photoelectric conversion efficiency in the organic photoelectric conversion module according to the present invention, as shown in FIGS. 5B and 5C, two different longitudinal division ratios (length / width ratio 8.11 and 2.57) were designed. As shown in FIG. 5A and FIG. 5A, the conventional single element is used as a comparative group (the length / width ratio is 17.03, connected to the module allowing the module condition) The modules were fabricated and compared.

< Example  4> narrow device width (3.7 mm ) Comparison of characteristics of organic photoelectric conversion module

 The current-voltage characteristics of the organic photoelectric conversion module manufactured in Example 3 were measured, and the results are shown in comparison with FIG.

As a result, as shown in FIG. 6A, the effective area of the organic photoelectric conversion module manufactured by the conventional method was 18.6 cm ² , the short circuit voltage was 2.414 V, the current density per unit area was 0.95895 mA / cm 2, the curve factor was 0.38193, The photoelectric conversion efficiency was 0.88412%. On the other hand, as shown in FIG. 6B, in the module in which the elements are longitudinally divided according to the present invention, a module having a length-to-width ratio of 8.11 (two partitions, two parts) has an effective area of 17.8 cm ² , V, the current density per unit area was 1.1229 ㎃ / ㎠, the curve factor was 0.42981, and the photoelectric conversion efficiency was 1.2195%. The effective area was 16.9 cm ² , the short circuit voltage was 2.4888 V, the current density per unit area was 1.18 ㎃ / ㎠, the curve factor was 0.43132, and the photoelectric conversion efficiency was 1.2667% .

From the above results, a module having a length-to-width ratio of 8.11 exhibits a photoelectric conversion efficiency of 44% higher than that of the module according to the conventional method, and a module having a length-width ratio of 2.57 has a photoelectric conversion efficiency of 38% It means that the longitudinal area of the device according to the present invention for improving the photoelectric conversion efficiency is a very original and excellent method.

In order to systematize the results obtained from Examples 2 and 4, various characteristic values obtained from the graph of the current-voltage characteristic were obtained and are summarized in Table 1.

Device width
(mm) Length / width ratio Effective area
(cm ² ) Current density
(mA / cm ² ) Curve factor Shunt resistance
(Ω) Conversion efficiency
(%)
8.0 7.13 22.8 1.09 0.328 64539 0.99 3.38 21.6 1.23 0.335 92923 1.12 3.7 17.03 18.6 0.95 0.381 170815 0.881.22 8.11 17.8 1.12 0.430 223840 1.22 2.57 16.9 1.41 0.461 364745 1.27

As shown in Table 1, when the width of the device is wide, the effect of the longitudinal division of the device on the photoelectric conversion efficiency of the module is relatively small (about 15% increase), but when the width of the device is narrow, The influence on the photoelectric conversion efficiency of this module increases (an average of 40% increase).

As shown in the above table, the factors that greatly affect the photoelectric conversion efficiency when the device is vertically divided are the curve factor and the shunt resistance. These two values are greatly increased, resulting in a change in efficiency.

In the present invention, the shunt resistance is considered to be the greatest change factor among the above factors, and the analysis is performed to derive the optimum value of the length / width ratio of the device.

As a result of analyzing the change of the shunt resistance value as shown in Fig. 7, it was found that the module shunt resistance of the module design having a wide device and the ratio of the length to the width of the shunt resistance per unit area, Extrapolated values of the module shunt resistance of the module design with the extrapolated value and the narrow width of the device and the length / width ratio of the device at the inflection point of the shunt resistance per unit area, which is divided by the effective area, Lt; / RTI &gt;

Preferably, the device length to width ratio according to this embodiment may be between 15 and 20.

As shown in Table 1, the efficiency of the module increases as the device is divided longitudinally. However, it is necessary to form more devices within the area of a given module, but it will increase the total current throughput by receiving more sunlight.

That is, when the shunt resistance of the module is analyzed, the case where the length / width ratio of the elements in the module is between 15 and 20 is the optimum ratio at which the maximum amount of current can be extracted while obtaining the best photoelectric conversion within a given module area . Therefore, although the width of the device is smaller in the module, the device width of 3.7 mm used in the present invention is the minimum value because of the difficult process. Also, it can be seen that the optimum module conversion efficiency can be obtained when the length-width ratio of the device is about 16.

As a result, the organic photoelectric conversion module manufactured through longitudinal device division according to the present invention forms an electrode protection / charge collection layer so that the devices can collect a better charge in each divided device, So that no interference phenomenon occurs with respect to the current output of each other, and the photoelectric conversion efficiency is improved by maximizing the shunt resistance and minimizing the decrease due to the large-sized curvature of interest.

This is a phenomenon that can occur using any material. Therefore, when the organic photoelectric conversion module according to the present invention is used, the photoelectric conversion efficiency of the device using the conventional technique can be improved by up to 44%. Also, when the length-width ratio of the device is about 15 to 20, the optimum module conversion efficiency can be obtained.

It will be apparent to those skilled in the relevant art that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as defined by the appended claims. The appended claims are to be considered as falling within the scope of the following claims.

Claims (15)

As a method of manufacturing a large-area organic photoelectric conversion module,
Forming a longitudinal split pattern structure having a predetermined element length to width ratio of a transparent electrode on a transparent substrate;
Forming an electrode protection / charge collection layer on the transparent electrode on which the longitudinal split pattern structure is formed;
Forming a pn type polymer nanocomposite structure on the electrode protecting / charge collecting layer; And
And depositing a metal electrode on the pn-type polymer nanocomposite structure,
The elements connected in series by the longitudinal split pattern structure are longitudinally divided, each divided element acting independently from the other divided elements,
Wherein the device length-to-width ratio is in the range of 15-20. delete The method according to claim 1,
Wherein the transparent substrate is selected from the group consisting of glass, quartz, transparent plastic, polyethylene terephthalate (PET), and polyethersulfone. The method according to claim 1,
The transparent electrode may include a transparent conducting oxide (TCO) of indium tin oxide (ITO), indium zinc oxide (IZO), and aluminum-doped zinc oxide, Wherein the organic photoelectric conversion module is selected from the group consisting of polyethylene dioxythiophene (PEDOT), polyaniline, and polypyrrole. The method according to claim 1,
The electrode protection / charge collection layer may be formed from a group consisting of metal oxide (MoOx) such as molybdenum oxide, polyethylene dioxythiophene (PEDOT), polystyrenesulfonate (PSS), polyaniline and polypyrrole Wherein the organic photovoltaic conversion module is a photovoltaic cell. The method according to claim 1,
Wherein the p-type polymer in the pn-type polymer nanocomposite structure is at least one selected from the group consisting of polythiophene and derivatives thereof, poly (para-phenylene) and derivatives thereof, polyfluorene and derivatives thereof, and polyacetylene and derivatives thereof A method for manufacturing a photoelectric conversion module. The method according to claim 1,
In the pn-type polymer nanocomposite structure, the n-type polymer may include C60 fullerene, fullerene of C70 fullerene, 3,4,9,10-perylenetetracarboxylic bisbenzimidazole (3,4,9,10-perylenetetracarboxylic bisbenzimidazole , &Lt; / RTI &gt; PTCBI), and derivatives thereof. The method according to claim 1,
Wherein the metal electrode is selected from the group consisting of aluminum, magnesium, lithium, calcium, copper, silver, gold, platinum and alloys thereof. As a large area organic photoelectric conversion module,
A transparent substrate;
A transparent electrode formed on the transparent substrate so as to have a longitudinally divided pattern structure of a predetermined element length to width ratio;
An electrode protection / charge collection layer formed on the vertically divided transparent electrode;
A pn type polymer nanocomposite structure formed on the electrode protecting / charge collecting layer; And
And a metal electrode formed on the pn type polymer nanocomposite structure,
The elements connected in series by the longitudinal split pattern structure are longitudinally divided, each divided element acting independently from the other divided elements,
Wherein the length-to-width ratio is in a range of 15 to 20. delete 10. The method of claim 9,
Wherein the transparent substrate is selected from the group consisting of glass, quartz, transparent plastic such as PET (polyethylene terephthalate), and polyethersulfone. 10. The method of claim 9,
The transparent electrode may include a transparent conducting oxide (TCO) of indium tin oxide (ITO), indium zinc oxide (IZO), and aluminum-doped zinc oxide, An organic photoelectric conversion module selected from the group consisting of polyethylene dioxythiophene (PEDOT), polyaniline, and polypyrrole. 10. The method of claim 9,
The electrode protection / charge collection layer is selected from the group consisting of metal oxides such as molybdenum oxide (MoOx), polyethylene dioxythiophene (PEDOT), polystyrenesulfonate (PSS), polyaniline and polypyrrole Organic photoelectric conversion module. 10. The method of claim 9,
Wherein the p-type polymer in the pn-type polymer nanocomposite structure is selected from the group consisting of polythiophene and derivatives thereof, poly (para-phenylene) and derivatives thereof, polyfluorene and derivatives thereof, and polyacetylene and derivatives thereof,
The n-type polymer may be selected from the group consisting of C60 fullerene, fullerene of C70 fullerene, organic e-affinity of 3,4,9,10-perylenetetracarboxylic bisbenzimidazole (PTCBI) Material and derivatives thereof. &Lt; RTI ID = 0.0 &gt; 11. &lt; / RTI &gt; 10. The method of claim 9,
Wherein the metal electrode is selected from the group consisting of aluminum, magnesium, lithium, calcium, copper, silver, gold, platinum and alloys thereof.

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