JP2010135334A - Dye-sensitized solar cell, decorative device, electronic equipment, and manufacturing method of dye-sensitized solar cell - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dye-sensitized solar cell capable of improving freedom of decoration without decreasing power generation amount, to provide a decorative device having the dye-sensitized solar cell, to provide electronic equipment having the decorative device, and to provide a manufacturing method of the dye-sensitized solar cell. <P>SOLUTION: The dye-sensitized solar cell 11 is provided with an upper plate glass g1, a lower plate glass g2 which is arranged opposed to the upper plate glass, a first dye-sensitized solar cell layer 111 which is arranged in a first region E1 between the upper plate glass and the lower plate glass, and a second dye-sensitized solar cell layer 112 which is arranged in a second region E2 that is a region between the upper plate glass and the lower plate glass and is different from the first region E1, and has a different color from that of the first dye-sensitized solar cell layer. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a dye-sensitized solar cell, a decoration device including the dye-sensitized solar cell, an electronic device including the decoration device, and a method for manufacturing the dye-sensitized solar cell.

2. Description of the Related Art A dial that is a decorative plate for a watch including a solar cell has been known (for example, see Patent Document 1).
The timepiece dial described in Patent Document 1 is provided with, for example, a solar cell, a light transmitting substrate provided on the viewing side (sunlight incident surface side) of the solar cell, and having a step portion, and the step portion. By providing a decorative member such as pyroxene, the two members of the light transmitting substrate and the decorative member can be visually recognized from the sunlight incident surface, and the decorativeness can be improved.

Japanese Patent Laid-Open No. 10-39048

  However, the dial of the timepiece described in Patent Document 1 can be decorated with a variety of colors by providing a decorative member such as pyroxene, but the decorative member is closer to the sunlight incident surface than the solar cell. Therefore, since the external light is blocked by the decorative member, the power generation amount of the solar cell is reduced, and there is a problem that the degree of freedom of decoration is limited.

  Therefore, an object of the present invention is to provide a dye-sensitized solar cell that can improve the degree of freedom of decoration without reducing the amount of power generation, a decoration device including the dye-sensitized solar cell, and the decoration device. To provide an electronic device and a method for producing a dye-sensitized solar cell.

In order to solve the above problems, the invention described in claim 1 is a dye-sensitized solar cell, which is a light-transmitting first substrate (for example, the upper glass g1 in FIG. 4 and the upper glass g6 in FIG. )When,
A second substrate (for example, the lower glass plate g2 in FIG. 4 and the lower glass plate g7 in FIG. 17) disposed to face the first substrate;
The first dye-sensitized solar cell layer (for example, the first dye-sensitized solar cell layer 111 in FIG. 4, FIG. 17) disposed between the first substrate and the second substrate. A first dye-sensitized solar cell layer 711);
Between the first substrate and the second substrate, and disposed in a region different from the region where the first dye-sensitized solar cell layer is disposed; Second dye-sensitized solar cell layer (for example, second dye-sensitized solar cell layer 112 in FIG. 4, second dye-sensitized solar cell layer in FIG. 17) having a color different from that of the sensitive solar cell layer 712),
It is characterized by having.

Invention of Claim 2 is the dye-sensitized solar cell of Claim 1,
A decorative portion (for example, the decorative portion 20 in FIG. 8 and the decorative portion 30 in FIG. 9) formed on the first substrate is provided.

Invention of Claim 3 is a dye-sensitized solar cell of Claim 2, Comprising:
The decorative portion is printed on an outer surface of the first substrate.

Invention of Claim 4 is the dye-sensitized solar cell of Claim 2, Comprising:
The decorative part is characterized by being typeset or affixed to an outer surface (for example, outer surface g11 in FIG. 8) of the first substrate.

Invention of Claim 5 is a dye-sensitized solar cell of Claim 2, Comprising:
The decorative portion is formed by etching the outer surface of the first substrate (for example, the outer surface g11 in FIG. 9).

Invention of Claim 6 is a dye-sensitized solar cell of Claim 1, Comprising:
A decorative portion (for example, the decorative portion 40 of FIG. 10) formed on the second substrate;
The second substrate is a light transmissive substrate.

The invention described in claim 7 is the dye-sensitized solar cell according to claim 6,
The decorative portion is printed on the outer surface of the second substrate (for example, the outer surface g21 in FIG. 10).

The invention according to claim 8 is the dye-sensitized solar cell according to claim 6,
The decorative portion is typeset or affixed to the outer surface of the second substrate.

The invention according to claim 9 is the dye-sensitized solar cell according to claim 6,
The decorative portion is formed on the outer surface of the second substrate by etching.

The invention according to claim 10 is a dye-sensitized solar cell,
First dye-sensitized solar cell layer (for example, first dye-sensitized solar cell layer 611 in FIG. 14)
The second dye-sensitized solar cell layer (for example, the second dye-sensitized solar cell in FIG. 14) disposed at a position different in the direction perpendicular to the light receiving surface of the first dye-sensitized solar cell layer. Battery layer 612),
With
The color of the first dye-sensitized solar cell layer is different from the color of the second dye-sensitized solar cell layer.

Invention of Claim 11 is a dye-sensitized solar cell of Claim 10, Comprising:
The first dye-sensitized solar cell layer has a light receiving area larger than that of the second dye-sensitized solar cell layer and is disposed so as to overlap the second dye-sensitized solar cell layer. It is characterized by being.

The invention according to claim 12 is the dye-sensitized solar cell according to claim 11,
A light-transmissive first substrate (for example, the intermediate glass g3 in FIG. 14);
A second substrate (for example, lower glass g4 in FIG. 14) disposed on the side opposite to the sunlight incident surface side from the first substrate;
A light-transmitting third substrate (for example, the upper glass g5 in FIG. 14) disposed closer to the sunlight incident surface than the first substrate;
With
One of the first dye-sensitized solar cell layer and the second dye-sensitized solar cell layer is disposed between the first substrate and the second substrate, and the other is The first substrate and the third substrate are disposed between the first substrate and the third substrate.

The invention according to claim 13 is a decoration device,
The dye-sensitized solar cell according to any one of claims 1 to 12,
A light storage member (for example, the light storage member 13 in FIG. 4) that is disposed on the opposite side of the sunlight incident surface side than the second substrate and stores external light;
With
The second substrate is a light transmissive substrate.

The invention according to claim 14 is a decoration device,
The dye-sensitized solar cell according to any one of claims 1 to 12 (for example, the dye-sensitized solar cell 51 in FIG. 11),
A decorative plate (for example, a decorative plate 50 in FIG. 11) disposed on the side opposite to the sunlight incident surface side of the dye-sensitized solar cell;
With
The second substrate is a light transmissive substrate.

The invention according to claim 15 is a decoration device,
The dye-sensitized solar cell according to any one of claims 1 to 12,
A light-transmitting decorative plate (for example, a decorative plate 63 in FIG. 13) disposed closer to the sunlight incident surface than the dye-sensitized solar cell;
It is characterized by having.

The invention described in claim 16 is the decorative device according to claim 14 or 15,
The decorative plate is colored with a color different from the color of the first dye-sensitized solar cell layer and the color of the second dye-sensitized solar cell layer.

The invention described in claim 17 is an electronic device (for example, the wristwatch 100 in FIG. 1 and the mobile phone 700 in FIG. 15),
The decoration device according to any one of claims 13 to 16 is arranged in a device case (for example, a watch case 2 in FIG. 1 and a second housing 720 in FIG. 15).

The invention according to claim 18 is the electronic device according to claim 17,
A pointer (for example, a pointer 8b in FIGS. 1 and 12) that is disposed closer to the sunlight incident surface than the dye-sensitized solar cell and indicates the time;
A drive unit for driving the pointer (for example, the analog pointer mechanism 8 in FIG. 2);
A time character recognized by the color of the first dye-sensitized solar cell layer and the color of the second dye-sensitized solar cell layer and indicated by the pointer (for example, the time character of FIG. 1) T, the time letter t) in FIG.
It is characterized by having.

The invention according to claim 19 is a method for producing a dye-sensitized solar cell,
A transparent electrode (for example, the first transparent electrode 111a in FIG. 5) is laminated on a light transmitting substrate (for example, the upper glass g1 in FIG. 5), and a metal oxide layer (for example, the TiO ₂ layer in FIG. 5) is laminated on the transparent electrode. Laminating step of laminating 111b);
A first application step of applying a first resist (for example, the first resist R1 in FIG. 5) to a predetermined region of the metal oxide layer;
First addition of adding a first photosensitizing dye (for example, the first photosensitizing dye 111c in FIG. 5) to a region other than the region to which the first resist is applied of the metal oxide layer. Process,
A second application step of removing the first resist and applying a second resist (for example, the second resist R2 in FIG. 5) to the region to which the first photosensitizing dye is added; ,
In the region of the metal oxide layer where the first resist is removed, a second photosensitizing dye having a color different from that of the first photosensitizing dye (for example, the second photosensitizing dye 112c in FIG. 5). ) To add a second step,
It is characterized by having.

  According to the invention described in claim 1, since the color of the first dye-sensitized solar cell layer and the color of the second dye-sensitized solar cell layer are different, each dye-sensitized solar cell layer is separately provided. Thus, the decoration using the color of each dye-sensitized solar cell layer can be performed. Therefore, since the dye-sensitized solar cell layer has functions of both photoelectric conversion and decoration, the decoration area can be increased without decreasing the power generation amount of the dye-sensitized solar cell. The degree of freedom of decoration can be improved. Thereby, it can respond to a user's needs.

  According to the second aspect of the present invention, it is possible to obtain the same effect as the first aspect of the invention. In particular, since the decorative portion formed on the first substrate is provided, the dye sensitization is performed. The design can be further improved by overlapping the decoration by the solar cell layer and the decoration of the decoration portion of the first substrate.

  According to the invention described in claim 3, it is possible to obtain the same effect as that of the invention described in claim 2, and in particular, the decorative portion is printed on the outer surface of the first substrate. A simple decoration can be provided more easily.

  According to the invention described in claim 4, it is of course possible to obtain the same effect as that of the invention described in claim 2. In particular, since the decorative part is typeset or pasted on the outer surface of the first substrate. Therefore, it is possible to give a decoration with a more three-dimensional feeling and a higher-class feeling.

  According to the fifth aspect of the present invention, it is possible to obtain the same effect as the second aspect of the invention. In particular, the decorative portion is formed on the outer surface of the first substrate by etching. Further, more various decorations can be suitably applied.

  According to the sixth aspect of the present invention, it is possible to obtain the same effect as the first aspect of the invention, and in particular, since the decorative portion formed on the light-transmitting second substrate is provided. The design can be further improved by overlapping the decoration with the dye-sensitized solar cell layer and the decoration of the decoration portion of the second substrate.

  According to the seventh aspect of the invention, it is possible to obtain the same effect as that of the sixth aspect of the invention, and in particular, the decorative portion is printed on the outer surface of the second substrate. A simple decoration can be provided more easily.

  According to the invention described in claim 8, it is possible to obtain the same effect as that of the invention described in claim 6. In particular, since the decorative portion is typeset or pasted on the outer surface of the second substrate. Therefore, it is possible to give a decoration with a more three-dimensional feeling and a higher-class feeling.

  According to the ninth aspect of the invention, it is possible to obtain the same effect as the sixth aspect of the invention, and in particular, the decorative portion is formed on the outer surface of the second substrate by etching. Further, more various decorations can be suitably applied.

  According to the tenth aspect of the present invention, the first dye-sensitized solar cell layer and the first dye-sensitized solar cell layer disposed at different positions in the vertical direction with respect to the light-receiving surface of the first dye-sensitized solar cell layer. Each of the dye-sensitized solar cell layers, and the color of the first dye-sensitized solar cell layer is different from the color of the second dye-sensitized solar cell layer. Since the layers are recognized with different colors, decoration using the color of each dye-sensitized solar cell layer can be performed. Therefore, since the dye-sensitized solar cell layer has functions of both photoelectric conversion and decoration, the decoration area can be increased without decreasing the power generation amount of the dye-sensitized solar cell. The degree of freedom of decoration can be improved. Thereby, it can respond to a user's needs.

  According to the invention described in claim 11, it is needless to say that the same effect as that of the invention described in claim 10 can be obtained. In particular, the first dye-sensitized solar cell layer has the second dye-sensitized method. Since it has a larger light receiving area than the solar cell layer and is disposed so as to overlap the second dye-sensitized solar cell layer, the light receiving area of external light is increased. Therefore, the power generation amount of the dye-sensitized solar cell can be further increased, and it becomes possible to deal with a device having a larger power consumption.

  According to the twelfth aspect of the present invention, the same effect as that of the eleventh aspect of the invention can be obtained, in particular, the first dye-sensitized solar cell layer and the second dye-sensitized solar cell. One of the battery layers is disposed between the light transmissive first substrate and the second substrate, and the other is disposed between the first substrate and the light transmissive third substrate. Therefore, even if the dye-sensitized solar cell layers are stacked, the number of substrates can be reduced, and the dye-sensitized solar cell can be thinned.

  According to the invention described in claim 13, it is needless to say that the same effect as in the invention described in any one of claims 1 to 12 can be obtained, in particular, since the phosphorescent member emits light at night. However, the decoration by the dye-sensitized solar cell can be visually recognized, and the power generation can be performed by the light emission of the phosphorescent member, so that the power generation efficiency can be further improved.

  According to the invention described in claim 14, it is needless to say that the same effect as that of the invention described in any one of claims 1 to 12 can be obtained, in particular, sunlight incidence of a dye-sensitized solar cell. Since it has a decorative plate arranged on the side opposite to the surface side, it is possible to further improve the design by overlapping the decoration with the dye-sensitized solar cell and the decoration of the decorative plate. .

  According to the invention described in claim 15, it is needless to say that the same effect as that of the invention described in any one of claims 1 to 12 can be obtained, in particular, sunlight incidence of a dye-sensitized solar cell. Since it has a light-transmitting decorative plate arranged on the surface side, the decoration by the dye-sensitized solar cell and the decoration of the light-transmitting decorative plate will be visually recognized, The design can be improved without reducing the power generation amount.

  According to the invention described in claim 16, it is needless to say that the same effect as that of the invention described in claim 14 or 15 can be obtained. In particular, the decorative plate has a color of the first dye-sensitized solar cell layer. And since the color different from the color of the second dye-sensitized solar cell layer is colored, the combined color of the color of the dye-sensitized solar cell and the color of the decorative plate is visually recognized, More color variations can be achieved.

  According to the seventeenth aspect of the present invention, since the decoration device according to any one of the thirteenth to sixteenth aspects is arranged in the equipment case, the decoration can be freely performed without reducing the power generation amount of the dye-sensitized solar cell. An electronic device capable of improving the degree can be provided.

  According to the invention described in claim 18, it is needless to say that the same effect as that of the invention described in claim 17 can be obtained. In particular, the solar cell is disposed closer to the sunlight incident surface than the dye-sensitized solar cell. And a driving part for driving the pointer, and the decoration part includes a time character indicated by the pointer, so that the power generation amount of the solar cell is not reduced and abundant Since the watch functions as a watch having a unique color, the commercial value of the watch can be improved.

  According to the nineteenth aspect of the present invention, the transparent electrode is laminated on the light transmitting substrate, the metal oxide layer is laminated on the transparent electrode, and the first resist is applied to a predetermined region of the metal oxide layer. A first coating step, a first addition step of adding a first photosensitizing dye to a region other than a region of the metal oxide layer to which the first resist is coated, Removing the resist, applying a second resist to the region to which the first photosensitizing dye has been added, and a region of the metal oxide layer from which the first resist has been removed; And a second addition step of adding a second photosensitizing dye having a different color from that of one photosensitizing dye, so that the photosensitizing dye has both functions of photoelectric conversion and decoration, Manufacturing a dye-sensitized solar cell capable of improving the degree of freedom of decoration without reducing the amount of power generated by the solar cell It is possible, it is possible to meet the needs of the user.

1 is a partially omitted plan view showing a wristwatch of Embodiment 1 according to the present invention. It is sectional drawing of the wristwatch in the II-II line of FIG. It is sectional drawing of the decoration apparatus of the wristwatch of FIG. It is an enlarged view of the principal part of the decoration apparatus of FIG. It is a figure for demonstrating the manufacturing method of the dye-sensitized solar cell concerning this invention. It is a figure for demonstrating the manufacturing method of the dye-sensitized solar cell concerning this invention. It is a block diagram which shows the principal part structure of the wristwatch of FIG. It is sectional drawing which shows the principal part of the decoration apparatus of Embodiment 2 concerning this invention. It is sectional drawing which shows the principal part of the decoration apparatus of Embodiment 3 concerning this invention. It is sectional drawing which shows the principal part of the decoration apparatus of Embodiment 4 concerning this invention. It is sectional drawing which shows the decoration apparatus of Embodiment 5 concerning this invention. It is a partially omitted plan view showing a wristwatch of Embodiment 6 according to the present invention. It is sectional drawing of the decoration device of the wristwatch in the XIII-XIII line of FIG. It is an enlarged view of the principal part of the decoration apparatus of FIG. It is a top view which shows the mobile telephone of Embodiment 7 concerning this invention. It is sectional drawing of the mobile telephone in the XVI-XVI line | wire of FIG. It is an enlarged view of the principal part of the dye-sensitized solar cell of the mobile phone of FIG. FIG. 16 is a block diagram illustrating a main configuration of the mobile phone in FIG. 15.

[Embodiment 1]
DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment in which a dye-sensitized solar cell according to the present invention is applied to a wristwatch as an electronic device will be described in detail with reference to the drawings.
1 is a partially omitted plan view showing a wristwatch of Embodiment 1 according to the present invention, FIG. 2 is a cross-sectional view of the wristwatch taken along line II-II in FIG. 1, and FIG. FIG. 4 is an enlarged view of a main part of the decoration device of FIG.

First, the overall configuration of the wristwatch 100 will be described.
As shown in FIGS. 1 and 2, the wristwatch 100 is provided with a watch case 2 as a cylindrical device case that accommodates a clock timing unit 1 therein, and a sunlight incident surface is provided above the watch case 2. A watch glass 3 covering the side opening is mounted. Furthermore, a back cover 4 that covers the opening opposite to the sunlight incident surface is attached to the lower portion of the watch case 2 with a screw (not shown) via a waterproof ring 4a.
Further, on the outer periphery of the watch case 2, switches 102a to 102d for instructing execution of various functions of the wrist watch 100 constituting the input unit 102 (see FIG. 7) are provided.

For example, as shown in FIG. 2, the clock timing unit 1 includes an upper housing 5, a lower housing 6 provided on the opposite side of the sunlight incident surface of the upper housing 5, and the upper housing 5 and the watch glass 3. A decoration device 10 provided between them is provided.
A frame-like member 7 is arranged on the upper portion of the upper housing 5 so that the upper surface thereof is substantially in contact with the lower surface of the watch glass 3.

In the lower housing 6, an analog pointer mechanism 8 as a drive unit and a secondary battery 9 for storing electric power generated by a dye-sensitized solar cell 11 (described later) of the decoration device 10 are incorporated.
The analog pointer mechanism 8 includes a pointer shaft 8a extending upward from a shaft hole a provided in the dye-sensitized solar cell 11, and a pointer composed of an hour hand 81, a minute hand 82, and a second hand 83 attached to the pointer shaft. 8b, and the pointer 8b moves above the dye-sensitized solar cell 11.
The analog pointer mechanism 8 and the secondary battery 9 are each electrically connected to the circuit board 12.

Next, the decoration device 10 will be described.
As shown in FIG. 3, the decoration device 10 includes a dye-sensitized solar cell 11 and a phosphorescent member 13 disposed on the side opposite to the sunlight incident surface side of the dye-sensitized solar cell 11. Is done.

First, the dye-sensitized solar cell 11 will be described.
As shown in FIGS. 3 and 4, the dye-sensitized solar cell 11 includes, for example, an upper glass g1 as a light-transmitting first substrate, and a second glass disposed opposite to the upper glass g1. A light-transmitting lower plate glass g2 as a substrate, a first dye-sensitized solar cell layer 111 disposed in a first region E1 between the upper plate glass g1 and the lower plate glass g2, and an upper plate glass g1 And a second dye-sensitized solar cell layer 112 and the like disposed in the second region E2 between the glass plate 2 and the lower glass plate g2.

The first dye-sensitized solar cell layer 111 includes a first transparent electrode 111a laminated on the inner surface g10 (lower surface) of the upper glass sheet g1, and a metal oxide layer laminated on the first transparent electrode 111a. A titanium oxide layer 111b (hereinafter referred to as a TiO ₂ layer), a first photosensitizing dye 111c (for example, an orange photosensitizing dye) adsorbed on the TiO ₂ layer 111b, There is provided a second transparent electrode 111d and the like laminated on the inner surface g20 (upper surface) of the plate glass g2 and disposed to face the first transparent electrode 111a.
The color of the first photosensitizing dye 111c is the color of the first dye-sensitized solar cell layer 111.

  Here, as the first photosensitizing dye 111c, any dye that absorbs light capable of generating electromotive force can be selected. Examples of such a dye include transition metal complexes such as ruthenium complexes, osmium complexes, rhodium complexes, and palladium complexes, or ruthenium-cis-diaqua-bipyridyl complexes, or phthalocyanines, porphyrins, dithiolate complexes, and acetylacetonate complexes. So-called metal chelate complexes, organic dyes such as cyanidin dyes, merocyanine dyes, rhodamine dyes, oxadiazole derivatives, benzothiazole derivatives, coumarin derivatives, stilbene derivatives, organic compounds having an aromatic ring, and the like are preferable. These dyes preferably have a large extinction coefficient and are stable against repeated redox. The dye molecule may be a low molecular compound or a polymer having a repeating unit.

The first photosensitizing dye 111c is preferably chemically adsorbed on the TiO ₂ layer 111b, such as a carboxyl group, a sulfonic acid group, a phosphoric acid group, an amide group, an amino group, a carbonyl group, and a phosphine group. It is preferable to have a functional group of Further, it is preferable that there are a plurality of such functional groups in the dye molecule.
As shown in FIG. 4, it is preferable to use a porous TiO ₂ layer 111b so that the first photosensitizing dye 111c can be adsorbed more.

Further, an electrolyte solution 111e for transporting electrons emitted from the first photosensitizing dye 111c is sealed between the upper glass plate g1 and the lower glass plate g2 by a sealing member 11a. As this electrolyte solution 111e, for example, a solution obtained by adding lithium iodide or metal iodine to polyethylene glycol, or containing lithium iodide or cerium (III) sulfate is used.

When the first dye-sensitized solar cell layer 111 is irradiated with external light, the first photosensitizing dye 111c absorbs light energy and emits electrons. The emitted electrons are transferred to the first transparent electrode 111a via the TiO ₂ layer 111b, and an external predetermined load resistance (for example, an analog pointer mechanism of the clock timing unit 1) is transferred from the first transparent electrode 111a. 8 etc.). The electrons that have moved through the load resistance reach the second transparent electrode 111d, and then return to the first photosensitizing dye 111c through the electrolyte layer 111e.
As described above, it is possible to generate electric power by generating an electric current by an electron circulation phenomenon and supply electric energy to the load resistance.

The second dye-sensitized solar cell layer 112 is provided with a second photosensitizing dye 112c (for example, a blue photosensitizing dye) having a color different from that of the first photosensitizing dye 111c. Since it is the same structure as the 1st dye-sensitized solar cell layer 111, detailed description is abbreviate | omitted.
Note that the color of the second photosensitizing dye 112c is the color of the second dye-sensitized solar cell layer 112.

  Further, as shown in FIG. 1, the dye-sensitized solar cell 11 is identified by the color of the first dye-sensitized solar cell layer 111, the color of the second dye-sensitized solar cell layer 112, and the like. Background area B1, time letter T, and letter L1.

For example, as illustrated in FIG. 1, the background region B1 is the entire region of the dye-sensitized solar cell 11 other than the time character T and the character L1.
More specifically, for example, the background region B1 has an orange color. That is, as shown in FIG. 4, the portion of the background region B1 is a portion corresponding to the first dye-sensitized solar cell layer 111.
Accordingly, the first region E1 itself in which the first dye-sensitized solar cell layer 111 is disposed becomes the background region B1 as it is.

For example, as shown in FIG. 1, the time letter T is a substantially rectangular pattern in plan view, and is provided at twelve positions at equal intervals in the circumferential direction. This time letter T is indicated by the pointer 8b, so that the current time can be known.
More specifically, for example, the time letter T is blue. That is, as shown in FIG. 4, the part of the time letter T is a part corresponding to the second dye-sensitized solar cell layer 112. That is, the time letter T is identified by the color of the second dye-sensitized solar cell layer 112 and the color of the first dye-sensitized solar cell layer 111 that is the color of the background region B1.
Accordingly, the second region E2 itself in which the second dye-sensitized solar cell layer 112 is disposed becomes the portion of the time letter T as it is.

The character L1 is character information indicating a company name, a product name, and the like, for example. Specifically, for example, as shown in FIG. 1, a four-letter alphabet of “A”, “B”, “C”, and “D” is formed in the vicinity of the portion corresponding to 12:00 of the time character T. , Character L1 ("ABCD").
More specifically, for example, the character L1 is green. That is, the letter L1 is a portion corresponding to a third dye-sensitized solar cell layer (not shown) having a green third photosensitizing dye (not shown). That is, the character L1 is identified by the color of the third dye-sensitized solar cell layer and the color of the first dye-sensitized solar cell layer 111 that is the color of the background region B1.

Next, the phosphorescent member 13 will be described.
As shown in FIG. 3, the phosphorescent member 13 is disposed over the entire outer surface g <b> 21 of the lower glass sheet g <b> 2 of the dye-sensitized solar cell 11, and is configured to be capable of storing external light incident on the wristwatch 100. . And even if outside light does not enter the wristwatch 100 at night or the like, the light can be emitted continuously for a predetermined time.
The phosphorescent member 13 may be formed by spraying, printing, or the like, or may be formed by applying a phosphorescent paint or the like.

Next, a method for manufacturing the dye-sensitized solar cell 11 will be described.
5 and 6 are diagrams for explaining a method of manufacturing the dye-sensitized solar cell 11 according to the present invention. Here, a method of adding the first photosensitizing dye 111c and the second photosensitizing dye 112c will be described.

(Lamination process)
As shown in FIG. 5A, first, the first transparent electrode 111a (transparent electrode) is laminated on the inner surface g10 (lower surface) of the upper glass sheet g1.
Specifically, for example, by a known vacuum deposition method, sputtering method, chemical vapor deposition method (Chemical Vapor Deposition; CVD method), physical vapor deposition method (Physical Vapor Deposition; PVD method), sol-gel method, etc. The first transparent electrode 111a is laminated.

Next, a TiO ₂ layer 111b that is a metal oxide layer is stacked on the first transparent electrode 111a.
Specifically, for example, a TiO ₂ layer 111b is laminated by applying a suspension containing porous TiO ₂ and drying, a vacuum deposition method, a sputtering method, a CVD method, a PVD method, a sol-gel method, or the like. To do.

(First application process)
Next, as shown in FIG. 5B, after applying a first resist R1 to a predetermined region of the TiO ₂ layer 111b, patterning is performed by photolithography. Here, the predetermined region refers to, for example, a region other than the region to which the first photosensitizing dye 111c (for example, orange photosensitizing dye) is added, Patterning is performed so that the first resist R1 remains.
(First addition step)
Next, the first photosensitizing dye 111c is added to the region of the TiO ₂ layer 111b where the first resist R1 is not applied. Specifically, for example, a solution in which the first photosensitizing dye 111c is dissolved in a solvent such as alcohol is prepared, and then the upper glass plate g1 is dipped in the solution and then dried to obtain TiO _2. The first photosensitizing dye 111c enters and adsorbs on the layer 111b.

(Second application process)
Next, as shown in FIG. 5C, after removing the first resist R1 applied to the TiO ₂ layer 111b, the second resist is applied only to the region to which the first photosensitizing dye 111c is added. Apply R2.
The removal of the first resist R1 is performed using, for example, a remover for the first resist R1.
(Second addition step)
Next, a _second photosensitizing dye 112c (for example, a blue photosensitizing dye) having a color different from that of the first photosensitizing dye 111c is added to the region of the TiO ₂ layer 111b from which the first resist R1 has been removed. To do. Specifically, for example, by preparing a solution in which the second photosensitizing dye 112c is dissolved in a solvent such as alcohol, and then immersing the upper glass plate g1 in the solution for a certain time, the TiO ₂ layer 111b The second photosensitizing dye 112c enters and is adsorbed.

(Final process)
Next, as shown in FIGS. 6A and 6B, for example, after the second resist R2 is removed with a resist remover or the like, the second transparent electrode 111d is opposed to the first transparent electrode 111a. A lower glass plate g2 having a thickness of 2 is disposed (FIG. 6A), an electrolyte solution 111e is injected between the upper glass plate g1 and the lower glass plate g2 (FIG. 6B), and the electrolyte solution 111e is used as a thermoplastic resin or the like. It seals with the sealing member 11a (refer FIG. 3).

Next, the internal configuration of the wristwatch 100 will be described with reference to FIG.
As shown in FIG. 7, the wristwatch 100 includes a CPU 101, an input unit 102, a pointer drive circuit unit 103, a RAM 104, a ROM 105, a time measuring circuit unit 106, and an oscillation circuit unit 107, and excludes the oscillation circuit unit 107. Each part is electrically connected by a bus B.

  The CPU 101 performs an instruction to each functional unit, data transfer, and the like based on various programs stored in the ROM 105 in accordance with predetermined timing or an operation signal input from the input unit 102. In particular, the CPU 101 performs various controls such as outputting a time signal based on the current time data counted by the time measuring circuit unit 106 to the pointer drive circuit unit 103 to update the display time.

  The input unit 102 includes switches 102a to 102d (see FIG. 1) for causing the wristwatch 100 to execute various functions. When these switches 102 a to 102 d are operated, operation signals for the corresponding switches 102 a to 102 d are output to the CPU 101.

  The pointer driving circuit unit 103 is a circuit that constitutes a part of the analog pointer mechanism 8, and for example, outputs a driving signal based on the current time data by the time measuring circuit unit 106, moves the pointer, and gives a time instruction. .

The RAM 104 temporarily stores data processed by the CPU 104 under the control of the CPU 101.
The ROM 105 mainly stores a system program and the like related to the wristwatch 100.

  The clock circuit unit 106 is connected to an oscillation circuit unit 107 that always outputs a signal with a constant frequency, and counts the signals output from the oscillation circuit unit 107 to obtain current time data and the like. Then, the current time data is output to the CPU 101.

Next, the operation of the wristwatch 100 having the above configuration will be described.
First, an example of the operation of the wristwatch 100 when external light is incident will be described.
When external light such as sunlight and light from an indoor lamp is incident from the sunlight incident surface side of the watch glass 3, the incident light is transmitted through the upper glass plate g1 of the dye-sensitized solar cell 11 and is subjected to the first dye sensitization. Is absorbed by the first photosensitizing dye 111c of the solar cell layer 111 and the second photosensitizing dye 112c (see FIG. 4) of the second dye-sensitized solar cell layer 112, thereby performing photoelectric conversion. Power generation is performed. The electric power obtained by this power generation is used as driving electric power for the analog pointer mechanism 8 and the like, and the surplus electric power is charged in the secondary battery 9.
At this time, the external light incident on the wristwatch 100 is stored in the phosphorescent member 13 provided on the lower glass plate g <b> 2 of the dye-sensitized solar cell 11.

Next, an example of the operation of the wristwatch 100 when no external light is incident will be described.
At night, the light stored in the phosphorescent member 13 is emitted and the time letter T can be identified, so that the current time is visible.
It should be noted that the pointer 8b of the wristwatch 100 is moved by power charged in the secondary battery 9 at night, in a dark place, and the like.

According to the wristwatch 100 described above, the time letter T identified by the color of the first dye-sensitized solar cell layer 111 and the color of the second dye-sensitized solar cell layer 112 is provided. Therefore, since these dye-sensitized solar cell layers have functions of both photoelectric conversion and decoration (time letters), the decoration region is increased without reducing the power generation amount of the dye-sensitized solar cell 11. As a result, the degree of freedom of decoration can be improved. Thereby, it can respond to a user's needs.
Further, since the phosphorescent member 13 is provided on the lower glass plate g2 of the dye-sensitized solar cell 11 and the phosphorescent member 13 storing the external light emits light at night, the background region B1, the time letter T, and the letter L1 even at night. Can be visually recognized, and power generation can be performed by the light emission of the phosphorescent member 13, so that the power generation efficiency can be further improved.

In addition, in the said embodiment, although the structure which uses the light-transmitting lower plate glass g2 was shown, it is good also as a structure which uses a non-light-transmitting board | substrate instead of the lower plate glass g2.
Further, the number of dye-sensitized solar cell layers is not limited to three layers, and is appropriately set according to the design.

Further, the metal oxide layer is not limited to the TiO ₂ layer 111b, and may be, for example, a zinc oxide (ZnO) layer.

(Modification)
Next, a modified example of the wristwatch 100 will be described. In the said Embodiment 1, although the phosphorescent member 13 showed the structure provided in the outer surface g21 whole region of the lower glass plate g2, while providing the phosphorescent member 13 only in the part corresponding directly under the time letter T, and an hour hand Alternatively, the phosphorescent member 13 such as phosphorescent paint may be applied to the sunlight incident surfaces of the hands 8b of the 81, the minute hand 82, and the second hand 83.

  That is, in the first embodiment, the background region B1, the time letter T, and the character L1 (see FIG. 1) are all visually recognized by the light emitted from the phosphorescent member 13 at night or the like. In the example, the portion of the time letter T and the pointer 8 b are visually recognized by the light emitted from the phosphorescent member 13. Therefore, it is possible to reduce the amount of use of the phosphorescent member 13 while enabling time visibility at night or the like.

[Embodiment 2]
Next, a decoration device 200 according to a second embodiment of the present invention will be described with reference to FIG. FIG. 8: is sectional drawing of the principal part of the decoration apparatus of Embodiment 2 concerning this invention. In addition, since Embodiment 2 is the same as that of Embodiment 1 except for the decoration part 20, the same code | symbol is attached | subjected about the same structure and detailed description is abbreviate | omitted.

  As shown in FIG. 8, the decorative portion 20 is typeset on the outer surface g <b> 11 of the upper glass plate g <b> 1 of the dye-sensitized solar cell 21. More specifically, it is typeset in the region corresponding to the second dye-sensitized solar cell layer 112 of the upper glass sheet g1.

The decoration unit 20 is, for example, a figure corresponding to the time letter T shown in FIG. 1, a character corresponding to the character L1 such as “A” shown in FIG. 1, or a lattice pattern, concentric pattern, It includes a pattern such as a radial pattern, and is formed to protrude from the upper glass plate g1 toward the watch glass 3 side.
The decorative portion 20 is made of, for example, a metal member or the like, but light is emitted so that the second dye-sensitized solar cell layer 112 (second photosensitizing dye 112c) can efficiently absorb external light. It is preferable that it is made of a permeable member.

According to the decoration device 200 of the second embodiment described above, since the decoration part 20 is typeset on the outer surface g11 of the upper glass plate g1, more various decorations can be applied.
Moreover, since it is possible to decorate three-dimensionally by typesetting, variations in decoration can be increased.
Moreover, the decoration part 20 is comprised with shellfishes, such as a white butterfly shell, and pyroxenes, such as opal, and can be provided with a more high-class feeling.

In addition, you may comprise by adhering the decoration part 20 to the outer surface g21 of the lower glass plate g2.
Further, the decorative portion 20 may be typeset or affixed to both the outer surface g11 of the upper glass plate g1 and the outer surface g21 of the lower glass plate g2.
Moreover, the typesetting method or the sticking method of the decoration part 20 is not specifically limited, Any of a manual work and an automatic work are not ask | required.

[Embodiment 3]
Next, with reference to FIG. 9, the decoration apparatus 300 of Embodiment 3 concerning this invention is demonstrated. FIG. 9: is sectional drawing of the principal part of the decoration apparatus of Embodiment 3 concerning this invention. In addition, since Embodiment 3 is the same as that of Embodiment 1 except the decoration part 30, the same code | symbol is attached | subjected about the same structure and detailed description is abbreviate | omitted.

  As shown in FIG. 9, a decorative portion 30 is formed on the outer surface g11 of the upper glass plate g1 of the dye-sensitized solar cell 31 by etching. More specifically, the upper glass sheet g1 is formed in a concave shape in the region corresponding to the second dye-sensitized solar cell layer 112 from the outer surface g11 of the upper glass sheet g1 toward the opposite surface.

  The etching process for forming the decoration part 30 is performed as follows, for example. First, a resist (not shown) is applied to the outer surface g11 of the upper glass plate g1 on portions other than the portion where the decorative portion 30 is formed to form a decorative pattern of the decorative portion 30, and then the upper glass plate g1 is used as an etching solution. Immerse, scrape off the area where the resist is not applied, and finally remove the resist.

  According to the decorative device 300 of the third embodiment described above, the decorative portion 30 is formed on the outer surface g11 of the upper glass sheet g1 by etching. Can be decorated.

The decorative portion 30 may be formed by etching on the outer surface g21 of the lower glass sheet g2.
Further, the decorative portion 30 may be formed by etching both the outer surface g11 of the upper glass sheet g1 and the outer surface g21 of the lower glass sheet g2.
Moreover, the decoration part 30 formed by etching is not limited to a concave shape. For example, the peripheral part of the decoration part 30 may be etched to form the decoration part 30 in a convex shape.

[Embodiment 4]
Next, with reference to FIG. 10, the decoration apparatus 400 of Embodiment 4 concerning this invention is demonstrated. FIG. 10: is sectional drawing which shows the principal part of the decoration apparatus of Embodiment 4 concerning this invention. In addition, since Embodiment 4 is the same as that of Embodiment 1 about structures other than the decoration part 40, the same code | symbol is attached | subjected about the same structure and detailed description is abbreviate | omitted.

  As shown in FIG. 10, the decorative portion 40 is printed on the outer surface g <b> 21 of the lower glass sheet g <b> 2 of the dye-sensitized solar cell 41 of the decorative device 400. More specifically, it is printed in a region corresponding to the second dye-sensitized solar cell layer 112 of the lower glass plate g2.

  The decoration unit 40 is, for example, a figure corresponding to the letter T shown in FIG. 1 or the like, a character corresponding to the character L1 such as “A” shown in FIG. 1, a lattice pattern, a concentric pattern, Includes patterns such as radial patterns.

The decorative portion 40 is configured such that, for example, a non-light-transmitting or light-transmitting coating material is printed on the outer surface g21 of the lower glass plate g2, and the amount of transmitted external light is different from that of other portions. By doing so, it can be visually recognized by external light.
Further, the phosphorescent member 13 shown in the first embodiment is disposed in an area other than the printing area of the decoration unit 40.

  According to the decoration device 400 of the fourth embodiment described above, since the decoration part 40 is printed on the outer surface g21 of the lower glass plate g2, various decorations can be applied more easily. Further, it is not necessary to separately provide a decorative board for decoration, and the decorative device 400 can be made thin.

In addition, the decoration part 40 may be printed on the outer surface g11 of the upper glass plate g1. In this case, a light-transmitting printing paint is applied so that the second dye-sensitized solar cell layer 112 (second photosensitizing dye 112c) can absorb external light efficiently. desirable.
Further, the decorative portion 40 may be printed on both the outer surface g11 of the upper plate glass g1 and the outer surface g21 of the lower plate glass g2.

  Moreover, the printing method of the decoration part 40 is not specifically limited, For example, it prints using several types of printing methods, and you may make it improve visibility and design property more.

[Embodiment 5]
Next, with reference to FIG. 11, the decoration apparatus 500 of Embodiment 5 concerning this invention is demonstrated. FIG. 11: is sectional drawing of the decoration apparatus of Embodiment 5 concerning this invention. Since the configuration of the fifth embodiment is the same as that of the first embodiment except for the decorative plate 50, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

A decoration device 500 shown in FIG. 11 includes a decoration plate 50 disposed on the side opposite to the sunlight incident surface of the dye-sensitized solar cell 51.
The decorative plate 50 has a decorative portion 501 on the sunlight incident surface 50a. The decorative portion 501 is, for example, a figure corresponding to the letter T shown in FIG. 1 or the like, a character corresponding to the character L1 such as “A” shown in FIG. 1, or a lattice pattern or a concentric pattern. When the external light is incident, the pattern 501 includes a pattern such as a radial pattern, and is transmitted through the dye-sensitized solar cell 51 so that the decorative portion 501 of the decorative plate 50 is visible.
In the present embodiment, the decorative plate 50 may be either light transmissive or non-light transmissive.

  The decorative plate 50 has a color (for example, orange) of the first dye-sensitized solar cell layer 111 (see FIG. 4) of the dye-sensitized solar cell 51 and the second dye-sensitized solar cell. A color (for example, red) different from the color (for example, blue) of the battery layer 112 is colored. And the color which the color of this pigment | dye sensitizing type | mold solar cell layer of the pigment | dye with the color of this decoration board 50 was synthesize | combined is visually recognized.

According to the decorative device 500 of the fifth embodiment described above, the dye-sensitized solar cell is provided with the decorative plate 50 disposed on the side opposite to the sunlight incident surface side of the dye-sensitized solar cell 51. The decoration by 51 and the decoration of the decoration portion 501 of the decoration plate 50 are visually recognized, so that the design can be improved without reducing the power generation amount of the dye-sensitized solar cell 51. .
Further, since the decorative plate 50 is colored different from the color of each dye-sensitized solar cell layer, the composite color of the color of the dye-sensitized solar cell 51 and the color of the decorative plate 50 is visually recognized. As a result, color variations can be further increased.

  In addition, the decoration board 50 is good also as a structure provided in a sunlight incident surface side rather than the dye-sensitized solar cell 51. FIG. In this case, a light-transmitting material is used so that the dye-sensitized solar cell 51 can absorb external light.

[Embodiment 6]
Next, with reference to FIGS. 12-14, the wristwatch 600 of Embodiment 6 concerning this invention is demonstrated. 12 is a partially omitted plan view of the wristwatch of Embodiment 6 according to the present invention, FIG. 13 is a cross-sectional view of the wristwatch decoration device taken along line XIII-XIII in FIG. 12, and FIG. 14 is a schematic diagram of the decoration device of FIG. It is an enlarged view of a part. In addition, since Embodiment 6 is the same as that of Embodiment 1 except for the dye-sensitized solar cell 61 of the decoration device 60, the same reference numeral is given to the same configuration, and detailed description is omitted. .

Here, the dye-sensitized solar cell 61 in the present embodiment will be described.
As shown in FIGS. 13 and 14, the dye-sensitized solar cell 61 includes an intermediate glass g3 as a light-transmitting first substrate, and is disposed on the opposite side of the sunlight incident surface side from the intermediate glass g3. A light-transmitting lower glass plate g4 as a second substrate provided, an upper glass plate g5 as a light-transmitting third substrate disposed closer to the sunlight incident surface than the intermediate glass g3, and the intermediate glass The first dye-sensitized solar cell layer 611 disposed between g3 and the lower glass plate g4, and the second dye-sensitized solar cell disposed between the intermediate glass g3 and the upper glass plate g5. Layer 612 and the like are provided.

As shown in FIG. 12, the upper glass plate g5 has a substantially rectangular shape in plan view. Moreover, the intermediate glass g3 has an area larger than each upper plate glass g5. The lower glass plate g4 has the same area as the intermediate glass g3.
The first dye-sensitized solar cell layer 611 has a larger light receiving area than the second dye-sensitized solar cell layer 612.
As described above, the second dye-sensitized solar cell layer 612 is disposed at a different position in the vertical direction with respect to the light receiving surface of the first dye-sensitized solar cell layer 611.

The first dye-sensitized solar cell layer 611 has, for example, an orange first photosensitizing dye (not shown). Accordingly, the first dye-sensitized solar cell layer 611 is orange.
The first dye-sensitized solar cell layer 611 constitutes the background region B2 shown in FIG. That is, the background region B2 has an orange color that is the color of the first dye-sensitized solar cell layer.

The second dye-sensitized solar cell layer 612 has, for example, a blue second photosensitizing dye (not shown). Therefore, the second dye-sensitized solar cell layer 612 is blue.
The second dye-sensitized solar cell layer 612 and each upper glass plate g1 constitute a time letter t (t1 to t12) indicated by the pointer 8b.

The time letters t (t1 to t5, t7 to t12) are, for example, as shown in FIG. 13 and FIG. 14, in which each upper glass plate g5 is circumferentially arranged at equal intervals on the peripheral edge of the sunlight incident surface of the intermediate glass g3. The color of the first dye-sensitized solar cell layer 611 (orange) and the color of the second dye-sensitized solar cell layer 612 (blue) overlap with each other so that the orange color And is visually recognized as a composite color of blue.
That is, the time letters t (t1 to t5, t7 to t12) indicate the color (orange) of the first dye-sensitized solar cell layer 611 and the color (blue) of the second dye-sensitized solar cell layer 612. ).

Further, the second dye-sensitized solar cell layer 612 constituting the time letter t6 is configured not to overlap the first dye-sensitized solar cell layer 611. For example, as shown in FIG. 13, the first dye-sensitized solar cell layer 611 is sealed by the seal member 11a so that the space 611a is formed only in the region corresponding to the time letter t6. . That is, the time letter t6 is visually recognized as the color (blue) of the second dye-sensitized solar cell layer 612.
In addition, the external light which permeate | transmitted the 2nd dye-sensitized solar cell layer 612 which comprises the time letter t6 passes through the space part 611a of the 1st dye-sensitized solar cell layer 611, and is stored in the luminous member 13 It has come to be.

Further, the respective transparent electrodes of the respective second dye-sensitized solar cell layers 612 constituting the time character t (t1 to t12) are electrically connected by the electrode connecting portion 62 shown in FIG.
More specifically, for example, the first transparent electrode (not shown) of the second dye-sensitized solar cell layer 612 constituting the time character t1 and the first character constituting the time character t2 adjacent to the time character t1. The second transparent electrode (not shown) of the second dye-sensitized solar cell layer 612 is connected in parallel by the electrode connecting portion 62.
Similarly, the second transparent electrode (not shown) of the second dye-sensitized solar cell layer 612 that constitutes the time character t1, and the second dye-sensitized solar cell layer 612 that constitutes the time character t2. The first transparent electrode (not shown) is also connected in parallel by the electrode connecting portion 62.
For example, as shown in FIG. 12, the electrode connecting portion 62 includes time letters t (for example, time letters t1 to t4, time letters t5 to t8, About t9-t12), it is provided so that between each transparent electrode may be connected as mentioned above.

  According to the wristwatch 600 of the sixth embodiment described above, the time characters t1 to t1 identified by the color of the first dye-sensitized solar cell layer 611 and the color of the second dye-sensitized solar cell layer 612. t12 is provided. Therefore, since each dye-sensitized solar cell layer has both functions of photoelectric conversion and decoration (time letters), the decoration area is increased without decreasing the power generation amount of the dye-sensitized solar cell 61. As a result, the degree of freedom of decoration can be improved. Thereby, it can respond to a user's needs.

  In addition, the first dye-sensitized solar cell layer 611 has a larger light receiving area than the second dye-sensitized solar cell layer 612, and the second dye constituting time letters t1 to t5 and t7 to t12. The sensitized solar cell layer 612 is disposed so as to overlap with the first dye-sensitized solar cell layer 611. Therefore, since the light receiving area of the external light is increased, the power generation amount of the dye-sensitized solar cell 61 can be further increased, so that it is possible to deal with a device having a larger power consumption.

  A first dye-sensitized solar cell layer 611 is disposed between the upper glass sheet g5 and the intermediate glass glass g3, and a second dye-sensitized solar cell is disposed between the intermediate glass glass g3 and the lower glass sheet g4. Since the battery layer 612 is provided, the number of substrates can be reduced even when the dye-sensitized solar cell layers are stacked, and the dye-sensitized solar cell 61 can be thinned. .

In addition, the number of dye-sensitized solar cell layers is not limited to two layers, and is appropriately set according to the design.
Further, the shape of the upper glass plate g1 and the decorative plate 63 constituting the time letter t is not limited to a substantially rectangular shape in plan view, and may be a circular shape, an elliptical shape, an Arabic numeral shape, or the like. Further, depending on the shape of the upper glass plate g1, in addition to the time letter t, a character or pattern corresponding to the character L1 shown in FIG. 1 is used for the color of the first dye-sensitized solar cell layer 611 and the second color. You may comprise so that identification by the color of the dye-sensitized solar cell layer 612 is possible.

Moreover, the connection between the transparent electrodes by the electrode connection part 62 is not limited to a parallel connection, A series connection may be sufficient.
Moreover, it is not limited to the connection between the transparent electrodes in the adjacent four time letters t, but can be set as appropriate.

  Moreover, in the said embodiment, although the structure which uses the light-transmitting lower plate glass g4 was shown, it is good also as a structure which uses a non-light-transmitting board | substrate instead of using the lower plate glass g4.

[Embodiment 7]
Next, a mobile phone 700 according to a seventh embodiment of the present invention will be described with reference to FIGS.
15 is a plan view showing a mobile phone according to a seventh embodiment of the present invention, FIG. 16 is a cross-sectional view of the mobile phone along the line XVI-XVI in FIG. 15, and FIG. 17 is a dye sensitization of the mobile phone in FIG. 18 is an enlarged view showing a solar cell, and FIG. 18 is a block diagram showing a main configuration of the mobile phone of FIG. Note that the seventh embodiment is different from the first embodiment only in that the decoration device 70 is applied to the mobile phone 700. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 15, a mobile phone 700 as an electronic device is, for example, a foldable type, and includes a first housing 710 having a key input portion 710 a and the first housing 710 that is rotatable. The apparatus includes a second housing 720 as a device case provided and a decoration device 70 housed in the second housing 720.

  The decoration device 70 is disposed on the side opposite to the sunlight incident surface side of the dye-sensitized solar cell 71, the liquid crystal display unit 72 for displaying time and the like in a liquid crystal display, and the dye-sensitized solar cell 71 and the liquid crystal display unit 72. The EL light emitting element 73 and the like are provided.

  In the dye-sensitized solar cell 71, a background region B3 and a character L2 shown in FIG. 15 are formed. More specifically, for example, as shown in FIG. 17, the color of the first dye-sensitized solar cell layer 711 (the color of the first photosensitizing dye 711c; for example, red) is the same as that of the background region B3. The color of the second dye-sensitized solar cell layer 712 (the color of the second photosensitizing dye 712c; for example, blue) is the alphabet “A”, “I”, “C”. Configure the color. That is, the character L2 (“AIC”) is identified by the color of the first dye-sensitized solar cell layer 711 and the color of the second dye-sensitized solar cell layer 712.

For example, as shown in FIG. 16, the liquid crystal display unit 72 is between the upper glass plate g6 and the lower glass plate g7, and includes a first dye-sensitized solar cell layer 711 and a second dye-sensitized solar cell. The liquid crystal unit 72a is provided in a region below the region in which the layer 712 is provided.
That is, the first dye-sensitized solar cell layer 711, the second dye-sensitized solar cell layer 712, and the liquid crystal unit 72a are sandwiched and integrated between the upper glass plate g6 and the lower glass plate g7, respectively. It is configured.

  Further, a transmissive polarizing plate 74 is disposed at a position corresponding to the liquid crystal part 72a of the outer surface g61 of the upper glass sheet g6, and at a position corresponding to the liquid crystal part 72a of the outer surface g71 of the lower glass sheet g7. A polarizing plate 75 with a transflective reflector is provided.

The liquid crystal unit 72a includes, for example, an upper transparent electrode (not shown) provided on the surface opposite to the outer surface g61 of the upper plate glass g6, and a lower transparent provided on the surface opposite to the outer surface g71 of the lower plate glass g7. It comprises an electrode (not shown) and a liquid crystal layer (not shown) sealed between the upper transparent electrode and the lower transparent electrode. For the liquid crystal layer, for example, twist nematic (TN) liquid crystal having a twist angle of 90 degrees is used.
The light emitted from the EL light emitting element 73 is transmitted to the sunlight incident surface side through the polarizing plate 75 with a semi-transmissive reflector, and the light can be irradiated to the liquid crystal part 72a. ing.

  The liquid crystal unit 72a is electrically connected to the display drive circuit unit 701 shown in FIG. For example, when the display drive circuit unit 701 applies a predetermined voltage between the pair of transparent electrodes (not shown) based on the output instruction signal output from the CPU 101, the time, date, etc., according to the application state. The information can be digitally displayed.

The EL light emitting element 73 is fixed to the inner wall part 720a on the back surface side (opposite to the sunlight incident surface side) of the second housing 720 via the substrate 721, and the first element of the dye-sensitized solar cell 71 is fixed. The dye-sensitized solar cell layer 711, the second dye-sensitized solar cell layer 712, and the liquid crystal unit 72 a of the liquid crystal display unit 72 are provided so as to emit light.
This EL light emitting element 73 is also electrically connected to the display drive circuit 701 shown in FIG. When a predetermined key of the key input unit 710a is input or when the second housing 720 is rotated from the folded state, a light emission signal is output from the display drive circuit unit 701 to the EL light emitting element 73, Light is emitted from the EL light emitting element 73 to the dye-sensitized solar cell 71 and the liquid crystal part 72a, so that the display of the characters L2 and the liquid crystal display part 72 can be visually recognized.

As described above, according to the mobile phone 700 of the seventh embodiment, the characters identified by the color of the first dye-sensitized solar cell layer 711 and the color of the second dye-sensitized solar cell layer 712. L2 is provided. Therefore, since each dye-sensitized solar cell layer has both functions of photoelectric conversion and decoration (characters), the decoration region can be increased without reducing the power generation amount of the dye-sensitized solar cell 71. As a result, the degree of freedom of decoration can be improved. Accordingly, it is possible to meet the needs of the user. Further, since the dye-sensitized solar cell 71 itself has a decoration function, it is not necessary to separately provide a decoration member for decoration and the like, so that the cellular phone 700 can be thinned. .

  Further, the dye-sensitized solar cell 71 and an EL light emitting element that is disposed on the opposite side of the sunlight incident surface side from the dye-sensitized solar cell 71 and irradiates the dye-sensitized solar cell 71 with light. 73, the dye-sensitized solar cell 71 can generate electric power using external light and light emitted from the EL light-emitting element 73, and the power generation amount of the dye-sensitized solar cell 71 is further increased. Can do.

  Further, the light emitted from the EL light emitting element 73 passes through the dye-sensitized solar cell 71 and the liquid crystal part 72 a and reaches the sunlight incident surface side of the mobile phone 700. Accordingly, by causing the EL light emitting element 73 to emit light in a dark place, the characters L2, the liquid crystal display unit 72, and the like can be irradiated with the light, and the time, decoration, and the like indicated by the mobile phone 700 can be visually recognized. it can.

  Moreover, in the structure which forms the general liquid crystal display part 72 that sandwiches the liquid crystal part 72a between the upper glass sheet g6 and the lower glass sheet g7, the dye-sensitized solar cell 71 is also composed of the upper glass sheet g6 and the lower glass sheet g7. Therefore, it is not necessary to provide the dye-sensitized solar cell 71 and the liquid crystal display unit 72 in the thickness direction, and the mobile phone 700 can be thinned.

In addition, although only the character L2 is formed in the dye-sensitized solar cell 71 of the mobile phone 700, it may be a figure or a pattern such as a logo mark.
In addition, as shown in the second embodiment, the decorative portion may be typeset or affixed to the outer surface g61 of the upper glass plate g6. As shown in the third embodiment, the decorative portion is used as the outer surface g61 of the upper glass plate g6. The decorative portion may be printed on the outer surface g71 of the lower glass plate g7 of the dye-sensitized solar cell 71 as shown in the fourth embodiment.

Moreover, it is good also as a structure which provides the light-guide plate etc. which introduce | transduce the light emitted from this LED and irradiate it toward the dye-sensitized solar cell 71 instead of providing the EL light emitting element 73.
Furthermore, it is good also as a structure provided with the light-transmitting decorative board shown in Embodiment 5. FIG.

  In the above embodiment, a wristwatch and a mobile phone have been described as examples of the electronic device. However, the present invention is not limited to this, and the electronic device may be a PDA, a personal computer, an automobile instrument, etc. Various electronic devices may be used.

In addition, the time character may form, for example, a numeral such as an Arabic numeral or a Roman numeral, or a figure such as a circle or an ellipse.
Further, the number of time characters and characters and the positions of the characters are not limited.

  Moreover, when forming a decoration part in both upper plate glass and lower plate glass, it is good also as a structure which prints on one glass and typesets or affixes on the other glass. Similarly, it is good also as a structure which sets and sticks to one glass, and etches the other glass, and it is good also as a structure which prints on one glass and etches the other glass.

2 Watch case (equipment case)
8 Analog pointer mechanism (drive unit)
8b Pointer 10, 60, 70, 200, 300, 400, 500 Decoration device 11, 21, 31, 41, 51, 61, 71 Dye-sensitized solar cell 13 Luminous storage member 20, 30, 40, 501 Decoration unit 50 Decoration Plate 100, 600 Watch (electronic equipment)
111,611,711 First dye-sensitized solar cell layer 112,612,712 Second dye-sensitized solar cell layer 111a First transparent electrode (transparent electrode)
111b TiO ₂ layer (metal oxide layer)
111c, 711c First photosensitizing dye 112c, 712c Second photosensitizing dye 700 Mobile phone (electronic device)
720 Second housing (equipment case)
g1, g6 Upper glass (first substrate)
g2, g7 Lower glass (second substrate)
g3 Intermediate glass (first substrate)
g4 Lower glass (second substrate)
g5 Upper glass (third substrate)
T, t Time letter R1 First resist R2 Second resist

Claims (19)

A light-transmissive first substrate;
A second substrate disposed opposite to the first substrate;
A first dye-sensitized solar cell layer disposed between the first substrate and the second substrate;
Between the first substrate and the second substrate, and disposed in a region different from the region where the first dye-sensitized solar cell layer is disposed; A second dye-sensitized solar cell layer having a color different from that of the sensitive solar cell layer;
A dye-sensitized solar cell comprising:   The dye-sensitized solar cell according to claim 1, further comprising a decorative portion formed on the first substrate.   The dye-sensitized solar cell according to claim 2, wherein the decorative portion is printed on an outer surface of the first substrate.   The dye-sensitized solar cell according to claim 2, wherein the decorative portion is typeset or affixed to an outer surface of the first substrate.   The dye-sensitized solar cell according to claim 2, wherein the decorative portion is formed on the outer surface of the first substrate by etching. A decorative portion formed on the second substrate;
The dye-sensitized solar cell according to claim 1, wherein the second substrate is a light-transmitting substrate.   The dye-sensitized solar cell according to claim 6, wherein the decoration portion is printed on an outer surface of the second substrate.   The dye-sensitized solar cell according to claim 6, wherein the decorative portion is typeset or affixed to an outer surface of the second substrate.   The dye-sensitized solar cell according to claim 6, wherein the decorative portion is formed on the outer surface of the second substrate by etching. A first dye-sensitized solar cell layer;
A second dye-sensitized solar cell layer disposed at a different position in the direction perpendicular to the light-receiving surface of the first dye-sensitized solar cell layer;
With
The dye-sensitized solar cell, wherein the color of the first dye-sensitized solar cell layer and the color of the second dye-sensitized solar cell layer are different.   The first dye-sensitized solar cell layer has a light receiving area larger than that of the second dye-sensitized solar cell layer and is disposed so as to overlap the second dye-sensitized solar cell layer. The dye-sensitized solar cell according to claim 10, wherein A light-transmissive first substrate;
A second substrate disposed on the side opposite to the sunlight incident surface side of the first substrate;
A light-transmitting third substrate disposed closer to the sunlight incident surface than the first substrate;
With
One of the first dye-sensitized solar cell layer and the second dye-sensitized solar cell layer is disposed between the first substrate and the second substrate, and the other is The dye-sensitized solar cell according to claim 11, wherein the dye-sensitized solar cell is disposed between the first substrate and the third substrate. The dye-sensitized solar cell according to any one of claims 1 to 12,
A light storage member disposed on the side opposite to the sunlight incident surface side than the second substrate, and stores external light;
With
The decoration apparatus according to claim 1, wherein the second substrate is a light-transmitting substrate. The dye-sensitized solar cell according to any one of claims 1 to 12,
A decorative plate disposed on the side opposite to the sunlight incident surface side than the dye-sensitized solar cell,
With
The decoration apparatus according to claim 1, wherein the second substrate is a light-transmitting substrate. The dye-sensitized solar cell according to any one of claims 1 to 12,
A light-transmitting decorative plate disposed on the sunlight incident surface side of the dye-sensitized solar cell,
A decoration device comprising:   15. The decorative plate is colored with a color different from the color of the first dye-sensitized solar cell layer and the color of the second dye-sensitized solar cell layer. 15. The decorative device according to 15.   An electronic device comprising the decoration device according to any one of claims 13 to 16 arranged in a device case. Arranged on the sunlight incident surface side of the dye-sensitized solar cell, a pointer for indicating the time,
A drive unit for driving the pointer;
A time character recognized by the color of the first dye-sensitized solar cell layer and the color of the second dye-sensitized solar cell layer and indicated by the pointer;
18. The electronic apparatus according to claim 17, further comprising: A lamination step of laminating a transparent electrode on a light transmitting substrate and laminating a metal oxide layer on the transparent electrode;
A first application step of applying a first resist to a predetermined region of the metal oxide layer;
A first addition step of adding a first photosensitizing dye to a region other than the region where the first resist of the metal oxide layer is applied;
Removing the first resist and applying a second resist to the region to which the first photosensitizing dye has been added; and
A second addition step of adding a second photosensitizing dye having a color different from that of the first photosensitizing dye to the region of the metal oxide layer from which the first resist has been removed;
A method for producing a dye-sensitized solar cell, comprising:

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