KR101116256B1 - Light-polarizing solar cell - Google Patents

Light-polarizing solar cell Download PDF

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KR101116256B1
KR101116256B1 KR1020100053472A KR20100053472A KR101116256B1 KR 101116256 B1 KR101116256 B1 KR 101116256B1 KR 1020100053472 A KR1020100053472 A KR 1020100053472A KR 20100053472 A KR20100053472 A KR 20100053472A KR 101116256 B1 KR101116256 B1 KR 101116256B1
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photoelectric conversion
solar cell
conversion layer
incident light
light
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KR20110133845A (en
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박병주
허윤호
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박병주
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract

Since it has anisotropic light absorptivity, the polarization absorptive solar cell which can also be used as a polarizer is disclosed. The solar cell has an anisotropic light absorption characteristic in which the incident light polarized in one direction and the incident light polarized in a direction perpendicular to each other have different anisotropy, so that incident light polarized in one direction passes and passes in a vertical direction. An anisotropic photoelectric conversion layer for absorbing polarized incident light to produce electrical energy; And first and second electrodes positioned on both sides of the anisotropic photoelectric conversion layer to extract electrical energy generated in the anisotropic photoelectric conversion layer.
.

Description

Light-polarizing solar cell

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to polarizing solar cells, and more particularly, to polarizing absorbing solar cells that can be used as polarizers because they have anisotropic light absorbing properties.

Since solar cells have the advantage of obtaining electrical energy from infinite sunlight, numerous researches and developments on high efficiency solar cells have been made. Solar cells currently being researched and developed are designed to absorb as much incident light as possible in order to produce as much electrical energy. Therefore, the design of solar cells with low light absorption efficiency is considered to be contrary to the basic goal of conventional solar cells. On the other hand, in the case of a polarizer, incident light polarized in a direction perpendicular to the light transmission axis is absorbed or reflected, and incident light polarized in a direction parallel to the light transmission axis is transmitted to form polarized light. At this time, all of the light energy absorbed by the polarizer is converted into heat and consumed.

SUMMARY OF THE INVENTION An object of the present invention is to provide an energy regenerative polarization solar cell which is capable of regenerating by converting light energy that is wasted by being converted into heat in a polarizer into electrical energy.

Another object of the present invention is to provide a highly efficient linear polarized light absorbing solar cell having an optical function as a polarizer and excellent in light absorbing characteristics and photoelectric conversion efficiency of polarizing light.

Still another object of the present invention is to provide a polarizing solar cell capable of producing electrical energy, which is applied to all the opto-electronic device areas in which the existing polarizers have been used, and at the same time, serves as a polarizer, which is impossible with conventional polarizers. It is.

In order to achieve the above object, the present invention has an anisotropic light absorption characteristic of the incident light polarized in one direction and the incident light polarized in a direction perpendicular thereto, the incident light polarized in any one direction An anisotropic photoelectric conversion layer through which silver passes, absorbs and blocks incident light polarized in another direction, and produces electrical energy from the absorbed light energy; And first and second electrodes positioned on both sides of the anisotropic photoelectric conversion layer to extract electrical energy generated by the anisotropic photoelectric conversion layer.

The polarizing solar cell according to the present invention may selectively absorb incident light linearly polarized in a specific direction among the incident light, and convert the absorbed light energy into electrical energy by using a photoelectric effect, so that it is applied instead of the existing polarizer. In addition to performing the role of, there is an advantage to produce electrical energy.

1 is a view showing the structure of a polarizing solar cell according to an embodiment of the present invention.
2a to 2c are views showing the structure of a liquid crystal display (LCD) and an organic light emitting device (OLED) having a polarizing solar cell according to the present invention.
3A and 3B are absorption spectrum graphs showing linear polarization light absorption characteristics (light absorption anisotropy) of a photoelectric conversion layer PV according to a comparative example and an embodiment of the present invention, respectively.
4A and 4B are polarization micrographs of a photoelectric conversion layer PV according to a comparative example and an embodiment of the present invention, respectively.
5A is a photograph showing a state in which a photoelectric conversion layer PV according to an embodiment (above) and a comparative example (below) of the present invention is positioned in a transmission axis direction of a reference polarizer.
5B is a photograph showing a state in which the photoelectric conversion layer PV according to the embodiment (above) and the comparative example (below) of the present invention is positioned in the direction of the blocking axis of the reference polarizer.
6A and 6B are graphs showing photoelectric current density-voltage (JV) characteristics of solar cells manufactured in Comparative Examples and Examples of the present invention, respectively.

Hereinafter, with reference to the accompanying drawings, a polarizing solar cell according to an embodiment of the present invention will be described in detail. The polarizing solar cell according to the present invention includes a photovoltaic (PV) conversion layer arranged in a unidirectional direction, and has a light absorption rate for incident light polarized in the absorption direction of the photoelectric conversion layer and a vertical direction of the absorption direction. The light absorption rate of the incident light polarized by the polarizer is controlled differently, and thus has an anisotropic property in light absorption. 1 is a view showing the structure of a polarizing solar cell according to an embodiment of the present invention, as shown in Figure 1, the polarizing solar cell according to the present invention, the first electrode 10, the second electrode 20 And anisotropic photoelectric conversion layer 30.

The first and second electrodes 10 and 20 are anodes and cathodes for extracting electrical energy (current) generated in the anisotropic photoelectric conversion layer 30, and both sides (upper and lower surfaces) of the photoelectric conversion layer 30. ), And the anisotropic photoelectric conversion layer 30 is sandwiched between the first and second electrodes 10 and 20. In the polarizing solar cell of the present invention, at least one, preferably both, of the first and second electrodes 10 and 20 should have a structure capable of passing incident light (solar light), for example, light Permeability may have a transparent or mesh-like structure of at least 50%, preferably at least 70-100%. As the first electrode 10 serving as the anode, non-limitingly, a thin transparent indium tin oxide (ITO) electrode, a tin oxide electrode, gold (Au), silver (Ag), and nickel , Metal electrodes such as platinum, palladium, selenium, mixtures thereof, polyaniline, poly (3-methythiophene), polyphenylene sulfide, poly (3,4- Ethylenedioxythiophene) and poly (4-styrenesulfonate) mixtures (poly (3,4-ethylene dioxythiophene) [PEDOT]: poly (4-styrenesulpho nate) [PSS], Clevios PVP. Al 4083, HC Starck Inc. And a polymer thin film electrode, etc., and the transparent ITO electrode is preferable because the transparent ITO electrode has a light transmittance (transparency) of about 80% or more in the visible light band. To 200 nm, preferably 70 to 100 nm, and the resistance thereof is 30 ohm / square or less, and, if necessary, the first electrode 10 and anisotropy. Between the photoelectric conversion layer 30 is preferably made of a conventional hole-injecting buffer layer, such as this may be further formed on the hole-injecting buffer layer is also excellent in transparency or light transmittance and major transmissibility material.

As the second electrode 20, a conventional solar cell negative electrode material may be used without limitation. Non-limiting examples of the material forming the second electrode 20 are aluminum (Al), magnesium (Mg), lithium (Li), cesium (Cs), barium (Ba), potassium (K), beryllium (Be) ), Calcium (Ca), mixtures (alloys) thereof, and the like, and the thickness of the second electrode 20 is usually 50 nm or less, for example, 10 to 45 nm. In addition, as needed, a conventional electron injection buffer layer (eg, an Al: Li alloy layer) may be further formed between the second electrode 20 and the anisotropic photoelectric conversion layer 30. The injection buffer layer is also preferably made of a material which is transparent or has excellent light transmittance and electron transfer properties.

In the polarization solar cell according to the present invention, the anisotropic photoelectric conversion layer 30 has anisotropic (anisotropic) light absorption characteristic of the light absorption rate of the incident light polarized in one direction and the incident light polarized in the other direction is different from each other. As a function of a polarizer that passes incident light polarized in one direction and a photovoltaic (PV) effect that absorbs light polarized in another direction to produce electrical energy, that is, a solar cell function. Have it all. In other words, the photoelectric conversion layer 30 used in the polarization solar cell according to the present invention is configured such that the light absorption rate in the light absorption axis direction is greater than the light absorption rate in the light transmission axis direction. The anisotropic photoelectric conversion layer 30 may have a structure in which a semiconductor thin film having light absorption is arranged in one direction. The light-absorbing semiconductor thin film is not limited to inorganic semiconductor materials such as Si, GaAs, AlGaAs, CdTe, etc. currently used in the manufacture of solar cells, as well as conductive or semiconducting monomolecules, oligomers, polymers, dyes ( dye), hybrids thereof, mixtures thereof, and the like. Specific examples of the organic semiconductor material useful as the photoelectric conversion layer 30 of the present invention include poly (3-hexyl thiophene) (P3HT), which serves as an electron donor, and phenyl C61-, which serves as an electron acceptor. A mixture of a butyric acid methyl ester (phenyl C61-butyric acid methylester, PCBM) (for example, P3HT: PCBM = 1: 0.5 to 1.5, preferably 1.2: 0.88, weight ratio) can be exemplified. When the mixture of P3HT and PCBM dissolved in a solvent such as 1,2-dichlorobenzene is coated on a substrate or an electrode, and the solvent is removed, the visible light region is approximately 400 to 800 nm. A photoelectric conversion layer 30 that absorbs light of the light is formed. As such, when the anisotropic photoelectric conversion layer 30 is formed using the polymer organic semiconductor material, there is an advantage in that a flexible polarizable polymer solar cell (PSC) device can be easily manufactured.

As a method of forming the semiconductor thin film, a vacuum deposition method in which a semiconductor material is deposited on a substrate or an electrode in a vacuum state, a solution method in which a semiconductor material dissolved in a specific solvent is coated on a substrate or an electrode, and a solvent is removed. Conventional methods can be used. In addition, by arranging the semiconducting thin film in a unidirectional or uniaxial manner, and increasing the light absorption rate of the linearly polarized light in a specific direction, the surface of the semiconducting thin film is polished in one direction and // Or a method of rubbing, a method of mechanically (dynamically) stretching a semiconducting thin film, a method of arranging precursors on a substrate aligned in one direction, and converting them into a semiconducting thin film, and arranging liquid crystal semiconductor materials in one direction Or a method of growing a semiconducting crystal in one direction, an epitaxial vacuum deposition method, an anisotropic chemical vapor deposition method, a friction transfer method, or the like.

The thickness of the photoelectric conversion layer 30 may vary depending on the use of the polarizing solar cell, but preferably 50 nm to 5,000 nm, more preferably 70 nm to 500 nm, most preferably 85 nm to 250 nm. to be. Here, when the thickness of the photoelectric conversion layer 30 is too thin, the production efficiency of electrical energy is lowered, and when too thick, the function as a polarizer may be lowered. Further, in the photoelectric conversion layer 30, the ratio (polarization ratio) of the light absorption rate of incident light polarized in one direction and incident light polarized in a direction perpendicular thereto may also vary depending on the use of the polarizing solar cell. , Preferably 1: 1.2 or more, more preferably 1: 2 or more, more preferably about 1: 100 to 200, for example, about 1: 1.2 to 200, specifically, about 1: 1.2 to 5, and the like. . Here, when the ratio of the said light absorption is out of the said range, there exists a possibility that either of a polarization characteristic and a photoelectric conversion characteristic may worsen excessively. In addition, by adjusting the type and arrangement of the semiconductor material constituting the photoelectric conversion layer 30, in the visible light wavelength region, it shows a high light absorption for a specific polarized light, while configured to show a high transmittance at the vertical polarized light Since the use of polarizing solar cells can be diversified, it is preferable. In addition, when a high polarization ratio is required, a structure combining a polarizing solar cell of the present invention and an existing polarizer may be used.

2A to 2C illustrate structures of a liquid crystal display (LCD) and an organic light-emitting device (OLED) having a polarizing solar cell according to the present invention. As shown in FIG. 2A, a transmissive liquid crystal display device to which a polarization solar cell according to the present invention is applied includes a backlight 52 for irradiating incident light and a polarization solar cell that transmits incident light in one direction and simultaneously generates electrical energy. (54), consisting of a liquid crystal layer 56 for passing or blocking incident light to display an image image and a conventional polarizing plate or polarizing solar cell 58 for transmitting only polarized light in one direction, while generating power (power generation), Information information can be displayed. In addition, as shown in FIG. 2B, the reflective liquid crystal display device to which the polarizing solar cell according to the present invention is applied includes a reflecting plate 62 for reflecting incident light incident from the outside and passing or blocking incident light to display an image image. It consists of a liquid crystal layer 64 and a polarization solar cell 66 to generate the electric energy by polarizing the incident light in one direction, it is possible to display image information while producing power. In addition, as shown in Figure 2c, the organic light emitting device to which the polarizing solar cell according to the present invention is applied, the first metal electrode 72 for supplying power to the organic light emitting layer 74, depending on whether the power supply image image Polarization of the incident light emitted from the organic light emitting layer 74 and the second electrode 76 and the organic light emitting layer 74 to supply power to the organic light emitting layer 74 together with the first metal electrode 72. And polarizing solar cells 78 that generate electrical energy, thereby generating power and displaying image information. In addition, if necessary, a λ / 4 retardation plate or the like may be positioned between the second electrode 76 and the polarizing solar cell 78 to increase the contrast ratio of the image.

As shown in Figs. 2A to 2C, in the LCD or OLED, by using the polarizing solar cells 52, 66, 78 according to the present invention instead of the conventional polarizing plate, not only the function of the polarizer but also the function of electric power production at the same time Can be done. As described above, the polarizing solar cell according to the present invention can be applied not only to LCD, OLED, etc., but also to a wide range of advanced opto-electronic devices such as optical communication and optical storage, which require polarization. have. In addition, although a device in which a reflective cholesteric liquid crystal (LC) (or polymer dispersed liquid crystal (PDLC)) and a solar cell are combined has been studied, the solar polarizing cell of the present invention is a solar polarizing cell / TN ( Twisted LCD or STN (Supertwisted) LCD / Reflector] structure can be easily applied. Therefore, the solar cell of the present invention improves the energy efficiency of the electronic device, and performs a function as a polar cell light absorbing solar cell (Solar Cell Polarizer) that makes it possible to easily and efficiently configure the electronic device.

Conventional solar cells do not have polarization absorbing anisotropy due to polarized light-selective incident light absorption, and do not exhibit a function as a polarizer. On the other hand, the linearly polarized solar cell according to the present invention selectively produces only electrical energy by absorbing only linearly polarized incident light in a given direction, whereas the linearly polarized solar cell transmits incident light polarized perpendicularly to the absorbed polarization direction without absorbing light. It also possesses properties, and not only produces electrical energy from sunlight, but also functions as a polarizer useful for various electronic devices.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. The following examples are intended to illustrate the present invention, but the scope of the present invention is not limited by the following examples.

EXAMPLES Preparation of Polymer Polarized Solar Cell

On the cleaned transparent substrate, a 80 nm-thick thin transparent indium-tin-oxide (ITO) electrode (anode) was formed by sputtering, and on the surface of the anode, poly (3,4-ethylenedioxythiophene) (PEDOT ) And a poly (4-styrenesulfonate) (PSS) mixed solution were spin coated to form a hole injection buffer layer about 40 nm thick. Next, on the hole injection buffer layer, a mixed solution of poly (3-hexylthiophene) (P3HT) and phenyl C61-butyric acid methyl ester (PCBM) (P3HT: PCBM = 1.2: 0.88 weight ratio, solvent: 1,2- Spin coating and drying to form a thin film of a photoelectric conversion layer (PV) having a thickness of about 80 nm, and rubbing the upper portion of the formed photoelectric conversion layer (PV) with a velvet cloth to align the photoelectric conversion layer (PV) in one direction. Arranged as. Next, an Al: Li alloy interfacial layer having a thickness of 1 nm was formed on the photoelectric conversion layer (PV) semiconductor thin film as an electron injection layer. At this time, the thermal deposition was performed using a shadow mask having a square aperture of 3 x 3 mm 2 at a pressure of 2 x 10 -6 torr and a speed of 0.02 nm / s. Finally, a pure Al layer electrode (cathode) was formed to a thickness of 50 nm or less using a thermal evaporation method on the electron injection layer (boundary layer), and after fabrication of a solar cell device, the film was killed at 150 ° C. for 10 minutes. Post-thermal annealing induced array anisotropy of the P3HT: PCBM photoelectric conversion layer.

Comparative Example Preparation of Polymer Polarized Solar Cell

A solar cell device was manufactured in the same manner as in Example, except that the photoelectric conversion layer PV was not arranged in one direction.

Evaluation of Polymer Solar Cell

(1) Optical transmission characteristics of the prepared photoelectric conversion layer (PV) were measured using a Cary 1E UV-vis spectrometer (Varian). 3A and 3B are absorption spectrum graphs showing linear polarization light absorption characteristics (light absorption anisotropy) of a photoelectric conversion layer PV according to a comparative example and an embodiment of the present invention, respectively. The polarized light absorption spectrum of the photoelectric conversion layer PV was observed for two incident light linearly polarized along the x-axis (rubbing direction) and the y-axis (direction perpendicular to the rubbing direction). As shown in FIG. 3A, the photoelectric conversion layer PV of the comparative example shows the same, i.e., isotropic light absorption characteristic with respect to the x-axis and the y-axis, respectively, as shown in FIG. 3B. The photoelectric conversion layer PV according to the present invention exhibits anisotropic light absorption characteristics with respect to the x-axis and the y-axis. That is, the light absorption spectrum of the photoelectric conversion layer PV according to the present invention strongly depends on the polarization direction of incident light, and the polarization absorption intensity varies according to the polarization direction. Specifically, the incident light polarized in the x direction shows strong absorption in all visible light regions of R, G, and B, that is, 350 to 800 nm, and the absorption is relatively small for the incident light polarized in the y direction. This difference means that light absorption in the photoelectric conversion layer PV occurs mainly along the x-axis. Thus, the x- and y-axes represent the extraordinary and normal optical axes, respectively. The normal optical axis coincides with the transmission axis of the photoelectric conversion layer PV, and the abnormal optical axis (x direction, rubbing direction) represents the blocking axis (or absorption axis) of the photoelectric conversion layer PV, respectively. The average extinction ratio or polarization ratio of the photoelectric conversion layer PV of this embodiment is estimated to be about 2.6: 1 in the wavelength region of 500 nm. Therefore, it can be seen that the photoelectric conversion layer PV of the present embodiment is useful as a polarizer.

(2) The polarization characteristic of the photoelectric conversion layer PV was investigated using the polarization microscope which combined the polarizer and the analyzer. 4A and 4B are polarization micrographs of the photoelectric conversion layer PV according to the comparative example and the embodiment of the present invention, respectively, and each photoelectric conversion layer PV is angled at a 45 degree angle between the crossed polarizer-analyzers. It was rotated four times (ie at four rotation angles). 4B, the photoelectric conversion layer PV according to the embodiment of the present invention has optical anisotropy, and two anisotropic optical axes of the photoelectric conversion layer PV are perpendicular to the x direction (rubbing direction) and y direction (rubbing). Direction). On the other hand, it can be seen from FIG. 4A that the photoelectric conversion layer PV according to the comparative example has no optical anisotropy.

(3) FIG. 5A is a photograph showing a state where the photoelectric conversion layer PV according to the embodiment (above) and the comparative example (below) of the present invention is positioned in the transmission axis direction of the reference polarizer, and FIG. 5B is a view of the reference polarizer The photo shows a state in which the photoelectric conversion layer PV according to the embodiment (above) and the comparative example (below) of the present invention is positioned in the blocking axis direction. As shown in FIGS. 5A and 5B, when the reference polarizer is rotated 90 degrees from the transmission axis (FIG. 5A) to the blocking axis (FIG. 5B), the anisotropic photoelectric conversion layer PV according to the present invention disappears in a transparent state. To change. Therefore, the photoelectric conversion layer PV according to the embodiment of the present invention operates as a polarizer in which the x axis is the blocking axis and the y axis is the transmission axis. On the other hand, the photoelectric conversion layer PV of a comparative example does not show the polarization transmittance at all.

(4) The photoelectric current density-voltage (JV) characteristics of the solar cell devices manufactured in Comparative Examples and Examples were measured with a source meter (Keithley 2400, USA), and the reference solar cell (Bunkoh-keiki, BS-520) was measured. And the results are shown in FIGS. 6A and 6B, respectively. At this time, two AM 1.5G standard light sources linearly polarized in the x (parallel) and y (perpendicular) directions (Newport, 96000 Solar Simulator, light intensity: 26.1 mW / cm 2 (100 mW / cm 2 (light intensity) x 0.261) (polarzixer transmittance)) was used as incident light As shown in Fig. 6A, the solar cell of the comparative example shows the same photoelectric JV characteristics regardless of the polarization state of the incident light, whereas as shown in Fig. 6B, According to the polarization solar cell, the photoelectric JV characteristic generated by incident light polarized in the x direction is larger than the photoelectric JV characteristic generated by incident light polarized in the y direction. It can be seen that the electrical energy generated by the light absorbed in (x) is greater than the electrical energy generated by the light absorbed in the direction of the light transmission axis y. Specifically, by the parallel axis (x) polarization absorption Photoelectric conversion efficiency is 1.8 In contrast to 1%, the photoelectric conversion efficiency due to the vertical axis (y) polarization absorption is 1.35% (ratio: 1.34), which is very high compared to the photoelectric conversion efficiency ratio 1.03 (3% error) of the comparative example. From the photoelectric JV characteristic graph, it can be seen that the solar cell according to the present invention has anisotropic polarized photoelectric characteristics.

Photoelectric properties of the solar cell devices manufactured in Comparative Examples and Examples are summarized in Table 1 below. Here, Voc, Jsc, FF , and PCE mean open circuit voltage, short circuit current density, fill factor, and power conversion efficiency, respectively. The ratio of PCE represents the ratio of the conversion efficiency (PCE) to the x-polarized incident light and the conversion efficiency (PCE) to the y-polarized incident light.

Solar cell Incident light polarization Voc
(V) Jsc
(mA / cm2) FF (%) PCE (%) Rain of PCE
x: y Comparative example Parallel (x) 0.570 2.570 68.8 3.86 103: 100
Perpendicular (y) 0.570 2.507 68.6 3.76 Example Parallel (x) 0.589 1.742 46.10 1.81 134: 100
Perpendicular (y) 0.570 1.374 45.03 1.35

From Table 1, it can be seen that compared with the conventional solar cell, the solar cell according to the present invention has excellent polarization photoelectric characteristics. Therefore, the solar cell according to the present invention can not only replace the existing polarizer, but also convert the polarized absorbed light energy into electrical energy. Although the present invention has been described in detail above with reference to specific embodiments, the technical scope of the present invention is not limited to the specific embodiments described above, but is defined by the following claims, and has a general knowledge in the field of the present invention. It is obvious that various modifications and adaptations can be made within the scope of the claims.

Claims (6)

The light absorption rate of incident light polarized in one direction and incident light polarized in a direction perpendicular thereto has different anisotropic light absorption characteristics, so that incident light polarized in one direction passes, and incident light polarized in the vertical direction An anisotropic photoelectric conversion layer that absorbs and plays a role of a polarizer and simultaneously produces electrical energy; And
Located on both sides of the anisotropic photoelectric conversion layer, the polarizing solar cell including a first and a second electrode for extracting the electrical energy generated in the anisotropic photoelectric conversion layer. The polarizing solar cell of claim 1, wherein the anisotropic photoelectric conversion layer has a structure in which semiconductor thin films having light absorptivity are arranged in one direction. The polarizing solar cell of claim 1, wherein the anisotropic photoelectric conversion layer is made of an inorganic semiconductor material or an organic semiconductor material. The polarizing solar cell of claim 1, wherein the anisotropic photoelectric conversion layer has a thickness of 50 nm to 5000 nm. The polarization solar cell of claim 1, wherein a ratio (polarization ratio) of the light absorption rate of incident light polarized in one direction of the anisotropic photoelectric conversion layer and incident light polarized in a direction perpendicular thereto is 1: 1.2 to 200. . The polarizing solar cell of claim 1, wherein at least one of the first and second electrodes has a light transmittance of 50% or more.
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KR20060056518A (en) * 2004-11-22 2006-05-25 한양대학교 산학협력단 Dye-sensitized solar cells, method of manufacturing the same and system and method of measuring electro-optic properties of the same
KR100859657B1 (en) * 2007-01-08 2008-09-23 삼성에스디아이 주식회사 Organic Light Emitting Diode Display including solar cell
JP2008258011A (en) * 2007-04-05 2008-10-23 Konica Minolta Holdings Inc Dye-sensitized solar cell
KR20100003407A (en) * 2008-07-01 2010-01-11 신훈규 Organic solar cell absobs multi-wavelength using ultra thin film type structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20060056518A (en) * 2004-11-22 2006-05-25 한양대학교 산학협력단 Dye-sensitized solar cells, method of manufacturing the same and system and method of measuring electro-optic properties of the same
KR100859657B1 (en) * 2007-01-08 2008-09-23 삼성에스디아이 주식회사 Organic Light Emitting Diode Display including solar cell
JP2008258011A (en) * 2007-04-05 2008-10-23 Konica Minolta Holdings Inc Dye-sensitized solar cell
KR20100003407A (en) * 2008-07-01 2010-01-11 신훈규 Organic solar cell absobs multi-wavelength using ultra thin film type structure

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