KR20100118472A - Rear spoiler with dye-sensitized solar cell - Google Patents

Abstract

PURPOSE: A rear spoiler with a dye-sensitive solar cell is provided to enable electronics, such as an audio device or TV to be operated in a vehicle for a long time using auxiliary power supply even if the engine of the vehicle is not driven. CONSTITUTION: A dye-sensitive solar cell(204) is connected to the upper part of a air-flow adjusting plate(201). A rear spoiler is formed on the upper part of the air-flow adjusting plate and comprises a protective plate(203) of a transparent material, which protects the solar cell from the external shock. The solar cell is buried in the upper part of the air-flow adjusting plate. A part of the upper part, in which the solar cell is not buried, has the same height to the upper surface of the protective plate.

Description

Rear spoiler with dye-sensitized solar cell

TECHNICAL FIELD The present invention relates to a rear spoiler, and more particularly, to a rear spoiler in which electronic devices that perform other functions without deteriorating the function of a rear spoiler for controlling the air flow of a vehicle are firmly coupled.

The rear spoiler of the car is an auxiliary device to help stable driving at high speeds. Since the overall shape of the car is streamlined, the airflow is formed faster than the bottom of the vehicle at high speeds, and according to Bernoulli's theorem, the car is forced upward and the driving stability is lowered. The rear spoiler is a device that regulates this airflow to improve driving stability, and is usually installed at the rear of a vehicle, especially to increase the load on the rear wheels.

(A) and (b) of FIG. 1 respectively show a cross section and air flow of a vehicle equipped with a rear spoiler and a rear spoiler. Referring to Figure 1 (a), the rear spoiler 101 is installed across the trunk 102 of the vehicle 100 in the transverse direction. Referring to Figure 1 (b), the cross section of the rear spoiler 101 is a streamlined convex downwards, the air flow is formed in the direction opposite to the driving direction during the driving of the vehicle. The airflow flowing upward and the airflow flowing downward meet at the rear of the spoiler 101. The airflow flowing downward becomes longer because the moving distance is longer than the airflow flowing upward. Therefore, according to Bernoulli's theorem, pressure is generated to the lower side of the rear spoiler 101 with a rapid flow of air, and a load is transmitted to the rear wheel to help stable driving.

The car consumes electricity to start the engine or to operate other engines. This electricity is generated by a generator that converts the power of the engine into electrical energy, which is used to charge a battery such as a lead rechargeable battery. Recently, a lot of convenience devices such as audio or DMB TV is installed in a car, and the use of such a convenience device is made even during parking, not driving of a car. However, when the electronic device is used for a long time without driving the engine, the rechargeable battery is discharged and the engine cannot be started again, and the complete discharge of the rechargeable battery also shortens the life of the rechargeable battery. The above problems can be solved by installing an auxiliary power source capable of self-generating in a vehicle.

The solar cell may be a power generation means that can effectively perform the role of an auxiliary power source of the vehicle. Auxiliary power sources such as solar cells should be installed outside the car to receive external light such as solar light. The rear spoiler can be installed in the car through a separate mounting process after the launch of the car. There is an advantageous position where it can be mounted. Solar cells are devices for converting light energy into electrical energy. Recently, various kinds of solar cells such as silicon solar cells, organic solar cells, or dye-sensitized solar cells have been developed. Among them, dye-sensitized solar cells have a problem of lower energy conversion efficiency than conventional silicon solar cells. However, dye-sensitized solar cells have low manufacturing costs and can be generated by visible light. In particular, dye-sensitized solar cells have the advantage of being able to generate power even when the vehicle is parked indoors because the power can be generated by visible light instead of ultraviolet light.

When the solar cell is installed on the upper side of the rear spoiler, the power generation efficiency is changed according to the incident angle of sunlight. Considering the function of the rear spoiler, since it is impossible to adjust the installation angle of the rear spoiler, it would be advantageous to be equipped with a dye-sensitized solar cell which is not affected by the incident angle of sunlight and has a constant electricity generation efficiency. However, until now, there has been no research to install solar cells in the rear spoiler or to solve the incident angle problem of sunlight.

Therefore, the problem to be solved by the present invention is a dye-sensitized solar cell that can be firmly coupled to the dye-sensitized solar cell while maintaining the original function of the rear spoiler, the power generation efficiency does not change significantly according to the incident angle of the external light To provide a mounted rear spoiler.

In order to achieve the above object, It provides a rear spoiler combined with a dye-sensitized solar cell on top of the airflow control plate.

According to an embodiment of the present invention, the rear spoiler may further include a protective plate made of a transparent material formed on the top of the dye-sensitized solar cell and protecting the dye-sensitized solar cell from an external impact.

According to another embodiment of the present invention, the dye-sensitized solar cell is buried in the upper portion of the airflow control plate and coupled, and the height of the upper surface of the protection plate and the upper surface of the dye-sensitized solar cell is not buried. Can be.

According to another embodiment of the present invention, the dye-sensitized solar cell includes an electrode and an oxide layer formed on the electrode to adsorb the dye molecules, the oxide layer is patterned on the first oxide layer and the first oxide layer formed on the electrode And a second oxide layer formed thereon.

According to another embodiment of the present invention, the patterned second oxide layer may be patterned in the form of lines spaced apart from each other.

According to another embodiment of the present invention, the patterned second oxide layer may be patterned in the form of an isolated island.

According to another embodiment of the present invention, the diameter of the oxide constituting the first oxide layer may be smaller than the diameter of the oxide constituting the second oxide layer.

According to another embodiment of the present invention, the diameter of the oxide constituting the first oxide layer is 2 to 50nm, the diameter of the oxide constituting the second oxide layer is preferably 100 to 1,000nm.

According to another embodiment of the present invention, the separation distance between adjacent patterns of the patterned second oxide layer is preferably 50% or more of the thickness of the second oxide layer.

According to another embodiment of the present invention, since the transparency of the second oxide layer is lower than that of the first oxide layer, a pattern of a predetermined pattern may be formed on the upper surface of the dye-sensitized solar cell by the patterned second oxide layer. Can be.

According to the present invention, since the dye-sensitized solar cell is coupled to the rear spoiler, it is possible to use electronic devices such as audio or TV for a long time in a car interior by using an auxiliary power source even in a condition where the engine of the vehicle is not driven. The dye-sensitized solar cell is embedded in the upper airflow control plate of the rear spoiler and forms a protection plate thereon, thereby preventing the solar cell from being damaged by an external impact, and the protection plate has the same height as the upper surface of the airflow control plate. It does not interfere with the flow of airflow. In addition, in the dye-sensitized solar cell of the present invention, since the oxide layer is formed on the electrode in a three-dimensional structure, the change in power generation efficiency according to the incident angle of external light can be minimized by the light scattering effect.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated in detail.

The rear spoiler of the present invention is coupled to the vehicle to control the airflow, the dye-sensitized solar cell is coupled to the upper portion of the airflow control plate can use the electricity generated by the external light as an auxiliary power source.

Figure 2 (a) shows the structure of the rear spoiler of the present invention. Referring to FIG. 2A, the rear spoiler 200 includes an airflow control plate 201, a support 202, a protection plate 203, and a dye-sensitized solar cell 204. Air flow control plate 201 may be made of a streamlined convex bottom to transfer the load to the rear wheel of the vehicle by adjusting the air flow of the upper portion and the lower portion when the vehicle is running. The airflow control plate 201 has a rear spoiler that is installed in such a way that the installation angle of the airflow control plate is adjusted so that the load can be transmitted downward while the vehicle is driven, even when the airflow control plate 201 is not formed in a streamlined convex shape as shown in FIG. It is also possible to retain the original function. The support 202 is coupled to the bottom of the airflow control plate 201 in a columnar form as a means for forming an airflow passage between the rear spoiler 200 and the upper surface (not shown) of the automobile trunk. The support 202 is not limited to the columnar shape, and may be formed in any form as long as it can form an air flow passage on the airflow control plate 201 and the trunk upper surface (not shown), and the airflow control plate 201 It may be made in one piece. The protection plate 203 is formed on the airflow control plate 201 as a means for protecting the dye-sensitized solar cell 204 from external impact, and external light may reach the dye-sensitized solar cell 204. It may be made of a transparent material such as tempered glass or polymer resin. The dye-sensitized solar cell 204 is embedded below the protective plate 203.

Figure 2 (b) shows a cross section of the rear spoiler of the present invention. Referring to Figure 2 (b), the lower surface of the airflow control plate 201 is formed in a convex shape compared to the upper surface to make the air flow downward downward. However, as described with reference to (a) of FIG. 2, the airflow control plate may maintain the function of the spoiler at an installation angle, not in the shape of a cross section. A step is formed in the upper surface of the airflow control plate 201, and the dye-sensitized solar cell 204 is buried in the low surface where the step is formed. The upper surface of the protection plate 203 formed above the airflow control plate 201 is installed at the same height as the portion of the upper surface of the airflow control plate 201 where the dye-sensitized solar cell 204 is not embedded. Therefore, the upper surface of the airflow control plate 201 is made of a smooth structure that is not formed stepped, it is possible to prevent the air flow is disturbed to generate noise or to reduce the function of the rear spoiler.

The rear spoiler advantageously holds the airflow throttle fixed at a constant angle in order to faithfully perform the original function of transferring the load to the rear wheels of the vehicle while driving. If the angle of the airflow control plate is fixed, the position of the dye-sensitized solar cell embedded therein is also fixed, so the power generation efficiency of the dye-sensitized solar cell is changed according to the angle of incidence of external light, especially solar light. In the dye-sensitized solar cell coupled to the rear spoiler of the present invention, an oxide layer formed on an electrode has a three-dimensional structure to solve the above problem. The dye adsorbed on the oxide layer absorbs light to generate electron-hole pairs, and the oxide layer transfers electrons to the photoelectrode to generate electrical energy, so that the efficiency of receiving external light varies depending on the structure of the oxide layer. do.

3 illustrates a substrate 301, an electrode 302, and an oxide layer 303 of a dye-sensitized solar cell in which an oxide layer is formed in a two-dimensional plane on an electrode. Referring to FIG. 3, an electrode 302 is formed on a substrate 301, and an oxide layer 303 is formed on one electrode on the electrode 302. Since the oxide layer 303 is formed of one layer, no step is formed on the surface of the oxide layer 303. Therefore, when the incident angle of the external light is changed, the intensity of the external light incident on the oxide layer 303 of the unit area is also changed.

4 illustrates a substrate 401, an electrode 402, and oxide layers 403a and 403b of a dye-sensitized solar cell coupled to a rear spoiler in accordance with one embodiment of the present invention. Referring to FIG. 4, an electrode 402 is formed on a substrate 401, and an oxide layer including a first oxide layer 403a and a second oxide layer 403b is formed thereon. The second oxide layer 403b is patterned in the form of lines spaced apart from each other on the first oxide layer 403a. The patterned second oxide layer 403b scatters incident light to reduce the degree of change in power generation efficiency according to the incident angle of external light. In more detail, when the external light irradiated to the dye-sensitized solar cell is sunlight, the incident angle of sunlight is continuously changed during the day. When the oxide layer is formed flat on the electrode, it is adsorbed on the oxide layer. Since dye molecules are also distributed in a plane, there is a problem that the amount of generated current is not sufficient when sunlight is irradiated at a non-vertical angle with respect to the dye-sensitized solar cell. However, when the dye molecules adsorbed on the second oxide layer are distributed in a three-dimensional form as in the case of the present invention, even though the angle of sunlight irradiated to the solar cell is not perpendicular to the electrode plane, some dye molecules are irradiated with sunlight. It is distributed at an angle perpendicular to and can generate a sufficient amount of current. Therefore, the dye-sensitized solar cell coupled to the rear spoiler of the present invention has an advantageous effect of stably producing a relatively uniform amount of electricity even if the incident angle of sunlight changes during the day. In addition, the patterned second oxide layer has a three-dimensional structure as a whole to increase the surface area of the oxide layer, thereby increasing the adsorption amount of the dye molecules to increase the overall power generation efficiency of the solar cell.

In one embodiment of the present invention, the electrode may be made of a conductive transparent material such as indium tin oxide or fluorine tin oxide, the oxide layer has a nanoporous structure and a wide bandgap It is preferable to be composed of an n-type oxide having, the oxide may be any one selected from the group consisting of TiO ₂ , ZnO and SnO ₂ . Various methods used in the art may be used to form the first oxide layer and the second oxide layer. For example, it is possible to form the first oxide layer and the second oxide layer by screen printing.

In one embodiment of the present invention, the diameter of the oxide constituting the first oxide layer is preferably smaller than the diameter of the oxide constituting the second oxide layer. Since the second oxide layer provides a function of scattering the bonding site where the dye molecules are adsorbed and the irradiated light, the larger the diameter of the oxide constituting the second oxide layer, the larger the amount of dye molecules adsorbed, and if the diameter is excessively small Due to the excessively close distance between the adsorbed dye molecules, mutual repulsive forces are generated, thereby reducing the adsorption amount of the dye molecules. However, in the case of the oxide constituting the first oxide layer, the adhesion strength with the electrode decreases as the diameter increases, and the efficiency of the solar cell may decrease because the dye directly contacts the electrode. From this point of view, the diameter of the oxide constituting the first oxide layer is preferably 2 to 50 nm, and the diameter of the oxide constituting the second oxide layer is preferably 100 to 1,000 nm. If the diameter of the oxide constituting the first oxide layer is less than 2 nm, the production of oxide particles is difficult, and if it exceeds 50 nm, the adhesive strength with the electrode becomes weak. If the diameter of the oxide constituting the second oxide layer is less than 100 nm or more than 1,000 nm, there is a problem that the dye molecules to be adsorbed are not sufficient. In general, as the diameter of the oxide layer becomes larger, the transparency of the oxide layer becomes lower. In the dye-sensitized solar cell, as the diameter of the oxide layer forms an oxide layer, the transparency of the solar cell is reduced as a whole. Compared to one of the advantages of dye-sensitized solar cells, transparency is greatly reduced. However, since the present invention is formed by patterning the second oxide layer, the remaining portion where the second oxide layer is not formed may maintain sufficient transparency. In addition, by forming a pattern of a predetermined pattern on the solar cell using a second oxide layer having a relatively low transparency, it has the advantage of displaying a pattern or letters, such as a heart pattern or business name on the exterior.

FIG. 5 illustrates a substrate 501, an electrode 502, and oxide layers 503a and 503b of a dye-sensitized solar cell coupled to a rear spoiler in accordance with another embodiment of the present invention. Referring to FIG. 5, an electrode 502 is formed on a substrate 501, and a first oxide layer 503a and a second oxide layer 503b are formed on the electrode 502. In this case, the second oxide layer 503b is patterned in the form of an island isolated on the first oxide layer 503a. The second oxide layer 503b serves to scatter light incident from the outside. The isolated island-type second oxide layer 503b may have a circular shape as shown in FIG. 5, but It is not limited and may be formed in various planar shapes as long as it can scatter external light. When the second oxide layer is formed in the form of an island isolated on the first oxide layer, the scattering effect of the external light by the second oxide layer may be maximized. That is, when the second oxide layer is linearly patterned, the scattering effect of the external light may change when the external light is incident along the traveling direction of the second oxide layer and when it is incident in the direction perpendicular to the traveling direction. This change can be minimized if the second oxide is in the form of an isolated island.

According to the present invention, the separation distance between the second oxide layers is preferably 50% or more of the thickness of the second oxide layer. When the separation distance between the second oxide layer is less than 50%, since the scattering effect by the second oxide layer is too low, the efficiency change of the dye-sensitized solar cell according to the incident angle of the external light is increased, the object of the present invention is to achieve May not be achieved. That is, when the separation distance between the second oxide layers is less than 50% of the thickness of the second oxide layer, the dye molecules adsorbed on the side surface of the patterned second oxide layer are covered by the neighboring second oxide layer so that sufficient light is not irradiated. As a result, overall dye-sensitized solar cells may be less efficient.

Hereinafter, the present invention will be described in more detail with reference to preferred examples. However, these examples are intended to illustrate the present invention in more detail, it will be apparent to those skilled in the art that the scope of the present invention is not limited thereby.

Example 1

The indium tin oxide coated glass substrate was first washed using an ultrasonic cleaner containing alcohol, and then washed secondly using a detergent to remove the residue. Thereafter, TiO ₂ paste (average diameter 20 nm) was coated on the indium tin oxide to a thickness of about 5 to 15 μm by screen printing, and then fired at about 450 to 500 ° C. to stack the first TiO ₂ thin film. On the first TiO ₂ thin film, TiO ₂ paste (average diameter 300 nm) was patterned and coated in the form of a line parallel to the longitudinal direction of the electrode made of indium tin oxide as shown in FIG. 6, and then fired at 500 ° C. to N719 dye. The negative electrode substrate on which the second TiO ₂ thin film was formed was immersed for 12 hours or more. At this time, the longitudinal direction of the electrode made of indium tin oxide was compared with the longitudinal and longitudinal lengths of the electrode, and the longer direction was referred to as the longitudinal direction. The counter electrode (anode) substrate was prepared by coating a platinum layer on a transparent conductive glass substrate coated with indium tin oxide. The negative electrode substrate and the counter electrode substrate are bonded to each other, and lithium iodide, iodine, 4-tert-butylpyridine, and guanidine thiocyanate are interposed therebetween. ) And 1-propyl-3-methylimidazolium iodide (1-propyl-3-methylimidazoliumiodide) was charged to finally prepare a dye-sensitized solar cell.

Example 2

A dye-sensitized solar cell was manufactured in the same manner as in Example 1, except that the _second TiO ₂ thin film was patterned and coated in the form of a line perpendicular to the longitudinal direction of the electrode made of indium tin oxide.

Comparative example

Spaced apart from each other instead of the structure were prepared, and the dye-sensitized solar cell in the same manner as in the first embodiment except that the second thin film on the 1TiO ₂ 2TiO ₂ thin film is deposited uniformly in a plane.

Experimental Example

The voltage and current of the dye-sensitized solar cells of Examples 1, 2 and Comparative Examples were measured and shown in Table 1 below.

Voltage (V) Current (mA) Example 1 5.6 68 Example 2 6.1 72 Comparative example 5.3 55

Referring to the above results, when the second TiO ₂ thin film has a plurality of linear structures spaced apart from each other as in Example 1 and Example 2, the second TiO ₂ thin film has a planar structure compared to the dye-sensitized solar cell of the comparative example. It can be seen that the improved current and voltage characteristics are exhibited. In particular, the case of Example _{2 in which the} second TiO ₂ thin film was patterned in the form of a line perpendicular to the longitudinal direction of the electrode made of indium tin oxide showed higher current and voltage characteristics than Example 1.

(A) and (b) of FIG. 1 respectively show a cross section and air flow of a vehicle equipped with a rear spoiler and a rear spoiler.

2A and 2B are respectively a perspective view and a cross-sectional view of the rear spoiler of the present invention.

3 illustrates a substrate, an electrode, and an oxide layer of a dye-sensitized solar cell in which an oxide layer is formed in a two-dimensional plane on an electrode.

4 illustrates a substrate, an electrode, and an oxide layer of a dye-sensitized solar cell coupled to a rear spoiler in accordance with one embodiment of the present invention.

5 illustrates a substrate, an electrode and an oxide layer of a dye-sensitized solar cell coupled to a rear spoiler in accordance with another embodiment of the present invention.

6 illustrates a structure in which a first thin film on the 2TiO ₂ 1TiO ₂ thin film according to the first embodiment of the present invention.

Figure 7 illustrates a structure in which a first thin film on the 2TiO ₂ 1TiO ₂ thin film according to the second embodiment of the invention.

Claims (10)

In the rear spoiler coupled to the car to regulate the airflow, Rear spoiler characterized in that the dye-sensitized solar cell is coupled to the top of the airflow control plate. The method of claim 1, A rear spoiler is formed on the airflow control plate, and further comprising a protective plate of a transparent material to protect the dye-sensitized solar cell from an external impact. The method of claim 2, The dye-sensitized solar cell is embedded in the upper portion of the air flow control plate coupled to the rear spoiler, characterized in that the height of the upper surface of the protective plate and the portion of the top surface of the dye-sensitized solar cell is not embedded. The method of claim 1, The dye-sensitized solar cell includes an electrode and an oxide layer formed on the electrode to adsorb dye molecules, and the oxide layer is formed on the first oxide layer and the first oxide layer patterned on the electrode. Rear spoiler characterized by including a layer. The method of claim 4, wherein The patterned second oxide layer is a rear spoiler characterized in that the patterned in the form of spaced apart from each other. The method of claim 4, wherein And the patterned second oxide layer is patterned in the form of an isolated island. The method of claim 4, wherein And a diameter of an oxide forming the first oxide layer is smaller than a diameter of the oxide forming the second oxide layer. The method of claim 4, wherein The diameter of the oxide constituting the first oxide layer is 2 to 50nm, the diameter of the oxide constituting the second oxide layer is a rear spoiler, characterized in that 100 to 1,000nm. The method of claim 4, wherein The spacing distance between the adjacent pattern of the patterned second oxide layer is at least 50% of the thickness of the second oxide layer. The method of claim 4, wherein The transparency of the second oxide layer is lower than the transparency of the first oxide layer, the rear spoiler characterized in that a pattern of a predetermined pattern is formed on the upper surface of the dye-sensitized solar cell by the patterned second oxide layer.

Images