TWI495913B - Light harvesting device capable of achieving one-step alignment and dye-sensitized solar cell structure of using the same - Google Patents

Description

Light-capturing device capable of being aligned at one time and dye-sensitized solar cell structure using same

The present invention relates to a light-trapping device and a dye-sensitized solar cell structure, and more particularly to a light-capturing device that can be aligned once and a dye-sensitized solar cell structure using the same.

The "light guiding member and the dye-sensitized solar cell structure using the same" disclosed in Japanese Laid-Open Patent Publication No. 201232791 discloses the use of a light guiding member to enhance the light capturing efficiency of a dye-sensitized solar cell. However, when the above-mentioned plurality of light guiding elements are assembled with the dye-sensitized solar cell, they must be aligned one by one to be optically coupled with the dye-sensitized solar cell, and the more the number of light guiding elements, the required The longer the assembly alignment time, the greater the assembly cost.

Therefore, it is necessary to provide an innovative and progressive single-alignment light-trapping device and a dye-sensitized solar cell structure using the same to solve the above problems.

The present invention provides a light-capturing device that can be aligned once, comprising: a first connecting member; a second connecting member opposite to the first connecting member; and a plurality of light guiding members disposed on the first connecting member Between the second connecting member, each of the light guiding members has a slot, and each of the light guiding members has a first end, a second end, a light incident surface, and a a first prism unit and a second mirror unit, each of the first ends is connected to the first connecting member, and each of the second ends is connected to the second connecting member, and the first prism unit is opposite to the light incident surface The second prism unit is symmetrically disposed with the first prism unit.

The invention further provides a dye-sensitized solar cell structure, comprising: a photoelectrode having a light incident surface and a plurality of nanoporous semiconductor films; a pair of electrodes disposed opposite to the photoelectrode; and a sealing spacer Between the photoelectrode and the pair of electrodes, the sealing spacer has a plurality of accommodating spaces, and each of the nanoporous semiconductor films of the photoelectrode is located in each of the accommodating spaces of the sealing spacer; Filling the accommodating space of the sealing spacer; and the light capturing device as described above is disposed on the light incident surface of the photoelectrode, and each of the light guiding members of the light capturing device corresponds to the sealing material, and Each of the slots of the light-trapping device corresponds to each of the nanoporous semiconductor thin films of the photoelectrode.

The invention enables the light guiding elements to be optically coupled with the dye-sensitized solar cell in only one alignment, which can greatly shorten the assembly alignment time and reduce the assembly cost.

The embodiments of the present invention can be more clearly understood, and the objects, features, and advantages of the present invention will become more apparent. The details are as follows.

10‧‧‧Light capture device

11‧‧‧First connector

12‧‧‧Second connector

13‧‧‧Light guiding components

13a‧‧‧ first end

13b‧‧‧second end

131‧‧‧light incident surface

132‧‧‧ first prism unit

132a‧‧‧First bevel

132b‧‧‧second slope

132c‧‧‧ first side

133‧‧‧Second mirror unit

133a‧‧‧3rd slope

133b‧‧‧four slope

133c‧‧‧ second side

14‧‧‧Slots

20‧‧‧Dye-sensitized solar cell structure

21‧‧‧Photoelectrode

21a‧‧‧Into the glossy side

211‧‧‧Transparent substrate

212‧‧‧Transparent conductive layer

213‧‧‧Nano porous semiconductor film

22‧‧‧ opposite electrode

221‧‧‧Substrate

222‧‧‧ Conductive layer

223‧‧‧catalytic layer

23‧‧‧ Sealed partition

231‧‧‧ accommodating space

24‧‧‧ Electrolytes

D1‧‧‧Width of the first connector

D2‧‧‧Width of the second connector

L1‧‧‧ first length

L2‧‧‧ second length

Thickness of T‧‧‧Light guiding elements

T1‧‧‧ thickness of the first connector

T2‧‧‧ thickness of the second connector

W1‧‧‧ first width

W2‧‧‧ second width

θ _a ‧‧‧first optical angle

θ _b ‧‧‧second optical angle

θ _c ‧‧‧third optical angle

θ ₁ ‧‧‧first angle

θ ₂ ‧‧‧second angle

1 is a perspective view showing the structure of a light-capturing device which can be aligned once in the present invention; FIG. 2 is a partial perspective view showing the light-capturing device of the present invention which can be aligned once along the line AA of FIG. 1. FIG. 3 shows that the present invention can be aligned once. FIG. 4 is a perspective view showing the structure of the dye-sensitized solar cell of the present invention using the light-capturing device of the present invention; and FIG. 5 is a cross-sectional view showing the structure of the dye-sensitized solar cell of the present invention taken along line BB of FIG. Vision Figure.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view showing the structure of a light-capturing device which can be aligned once in the present invention. Figure 2 is a partial perspective view of the light-capturing device of the present invention which can be aligned once along the line A-A of Figure 1. Figure 3 shows a cross-sectional view of a light-capturing device that can be aligned once in the present invention. Referring to FIG. 1 , FIG. 2 and FIG. 3 , the light-capturing device 10 of the present invention can include a first connecting member 11 , a second connecting member 12 and a plurality of light guiding members 13 . The second connecting member 12 is opposite to the first connecting member 11.

The light guiding members 13 are disposed between the first connecting member 11 and the second connecting member 12, and each of the light guiding members 13 has a slot 14 therebetween.

Each of the light guiding elements 13 has a first end 13a, a second end 13b, a light incident surface 131, a first prism unit 132, a second mirror unit 133, a first length L1, a first A width W1 and a thickness T. In this embodiment, each of the first ends 13a is connected to the first connecting member 11, and each of the second ends 13b is connected to the second connecting member 12. The first rectangular mirror unit 132 is opposite to the light incident surface 131. The second prism unit 133 is symmetrically disposed with the first prism unit 132.

The first prism unit 132 has a first inclined surface 132a, a second inclined surface 132b and a first side surface 132c. The second inclined surface 132b is opposite to the first inclined surface 132a. The first side surface 132c is perpendicular to the light incident surface 131. . In this embodiment, the first inclined surface 132a and the second inclined surface 132b have a first optical angle θ _a , and the first side surface 132 c and the second inclined surface 132 _b have a first angle θ ₁ .

The second prism unit 133 has a third inclined surface 133a, a fourth inclined surface 133b and a second side surface 133c. The fourth inclined surface 133b is opposite to the third inclined surface 133a, and the second side surface 133c is perpendicular to the light incident surface 131. . In this embodiment, the third inclined surface 133a and the first inclined surface 132a of the first rectangular mirror unit 132 have a second optical angle θ _b , and the third inclined surface 133 a and the fourth inclined surface 133 _b have a The third optical angle θ _c and the second side 133c and the fourth inclined surface 133b have a second angle θ ₂ .

In order to enable each of the light guiding elements 13 to smoothly guide the incident sunlight, in the embodiment, the second optical angle θ _b must be smaller than the first optical angle θ _a and when the sunlight is positively incident. (that is, when the incident angle is 0°), preferably, the second optical angle θ _b is between 50° and 60°, so that the positively incident solar light can be at the first inclined surface 132a and the first The three inclined faces 133a achieve total reflection. In addition, since the second prism unit 133 is symmetrical with the first mirror unit 132, the third optical angle θ _c is equal to the first optical angle θ _a , and the second angle θ ₂ is equal to the The first angle θ ₁ .

Moreover, in this embodiment, the first optical angle θ _a can be obtained from the second optical angle θ _b and the first included angle θ ₁ , and the calculation formula is θ _a =180°−θ ₁ +θ _b / 2, and the relationship between the first angle θ ₁ and the second optical angle θ _b is θ ₁ = θ _b +90°, so the calculation formula of the first optical angle θ _a can also be simplified as θ _a =90°- θ _b /2. Therefore, when the second optical angle θ _{b is} determined, the first optical angle θ _a and the first included angle θ ₁ can be calculated.

Each of the slots 14 has a second length L2 and a second width W2. Preferably, the second length L2 of each of the slots 14 is equal to the first length L1 of each of the light guiding elements 13. The second width W2 of the slot 14 is not less than the first width W1 of each of the light guiding elements 13 to prevent mutual interference between the adjacent light guiding elements 13, thereby reducing light capturing efficiency.

In addition, in the present embodiment, the width D1 of the first connecting member 11 and the width D2 of the second connecting member 12 are smaller than each of the light guiding members 13 in order to facilitate positioning of the light guiding members 13 after alignment. The first length L1, and the thickness T1 of the first connecting member 11 and the thickness T2 of the second connecting member 12 are not less than the thickness T of each of the light guiding members 13. Preferably, the thickness T1 of the first connecting member 11 and the thickness T2 of the second connecting member 12 are equal to the thickness T of each of the light guiding members 13.

Figure 4 is a perspective view showing the structure of a dye-sensitized solar cell of the present invention using a light-capturing device which can be aligned once. Figure 5 is a cross-sectional view showing the structure of the dye-sensitized solar cell of the present invention taken along line B-B of Figure 4 . Referring to FIG. 4 and FIG. 5, the present invention uses the light capturing device 10 The dye-sensitized solar cell structure 20 includes a photoelectrode 21, a pair of electrodes 22, a sealing spacer 23, an electrolyte 24, and the light capturing device 10.

The photoelectrode 21 has a light incident surface 21a, a transparent substrate 211, a transparent conductive layer 212, and a plurality of nanoporous semiconductor thin films 213.

The pair of electrodes 22 are disposed opposite to the photoelectrode 21, and the pair of electrodes 22 has a substrate 221, a conductive layer 222, and a catalytic layer 223.

The sealing spacer 23 is disposed between the photoelectrode 21 and the pair of electrodes 22. The sealing spacer 23 has a plurality of accommodating spaces 231, and each of the nanoporous semiconductor films 213 of the photoelectrode 21 is located at the sealing interval. Each of the materials 23 accommodates the space 231.

The electrolyte 24 is filled in the accommodating spaces 231 of the sealing spacer 23 .

The light-trapping device 10 is disposed on the light-incident surface 21a of the photo-electrode 21, and each of the light-guiding elements 13 of the light-trapping device 10 corresponds to the spacer 23, and each of the slots 14 of the light-trapping device 10 Each of the nanoporous semiconductor thin films 213 of the photoelectrode 21 should be used.

In this embodiment, after the light capturing device 10 is disposed on the light incident surface 21a of the photoelectrode 21, only one of the slots 14 of the light capturing device 10 needs to be aligned with its corresponding nanoporous semiconductor. The film 213 can simultaneously complete the alignment of the light guiding elements 13 at one time. Therefore, it is no longer necessary to perform multiple alignments for the respective light guiding elements 13, which greatly shortens the assembly alignment time.

Of course, in another embodiment, one of the light guiding elements 13 of the light capturing device 10 can also be aligned with its corresponding sealing spacer 23, and the other light guiding elements 13 can also be aligned once. .

After the alignment of the light guiding elements 13 is completed, the first connecting member 11 and the second connecting member 12 of the light capturing device 10 are fixed to the light incident surface 21a of the photoelectrode 21, that is, the light is completed. The guiding element 13 is optically coupled to the dye-sensitized solar cell.

The above embodiments are merely illustrative of the principles and functions of the present invention, and are not intended to limit the present invention. Therefore, those skilled in the art can make modifications and changes to the above embodiments. The spirit of the Ming. The scope of the invention should be as set forth in the appended claims.

10‧‧‧Light capture device

11‧‧‧First connector

12‧‧‧Second connector

13‧‧‧Light guiding components

13a‧‧‧ first end

13b‧‧‧second end

131‧‧‧light incident surface

14‧‧‧Slots

D1‧‧‧Width of the first connector

D2‧‧‧Width of the second connector

L1‧‧‧ first length

L2‧‧‧ second length

T1‧‧‧ thickness of the first connector

T2‧‧‧ thickness of the second connector

W1‧‧‧ first width

W2‧‧‧ second width

Claims (10)

A light-capturing device capable of being aligned once, comprising: a first connecting member; a second connecting member opposite to the first connecting member; and a plurality of light guiding members disposed on the first connecting member and the first connecting member Between the two connecting members, each of the light guiding elements has a slot, and each of the light guiding elements has a first end, a second end, a light incident surface, a first prism unit and a a second prism unit, each of the first ends is connected to the first connecting member, and each of the second ends is connected to the second connecting member, and the first prism unit is opposite to the light incident surface, the second mirror The unit is symmetrically disposed with the first prism unit. The light capturing device of claim 1, wherein the first prism unit has a first inclined surface and a second inclined surface, the second inclined surface is opposite to the first inclined surface, and the first inclined surface is opposite to the second inclined surface Having a first optical angle, the second prism unit has a third inclined surface and a fourth inclined surface, the fourth inclined surface is opposite to the third inclined surface, and the third inclined surface is opposite to the first curved mirror unit There is a second optical angle between the slopes, the second optical angle being smaller than the first optical angle. The light-trapping device of claim 1, wherein each of the light guiding elements has a first width, each of the slots has a second width, and a second width of each of the slots is not less than a size of each of the light guiding elements a width. The light-trapping device of claim 1, wherein each of the light guiding elements has a first length, each of the slots has a second length, and the second length of each of the slots is equal to the number of each of the light guiding elements One length. The light-trapping device of claim 4, wherein the width of the first connector is less than a first length of each of the light guiding members. The light-trapping device of claim 4, wherein the width of the second connector is less than a first length of each of the light guiding members. The light-trapping device of claim 1, wherein the thickness of the first connecting member is not less than a thickness of each of the light guiding members. The light-trapping device of claim 1, wherein the thickness of the second connecting member is not less than a thickness of each of the light guiding members. A dye-sensitized solar cell structure comprising: a photoelectrode having a light incident surface and a plurality of nanoporous semiconductor thin films; a pair of electrodes disposed opposite to the photoelectrode; and a sealing spacer disposed on the photonic electrode Between the photoelectrode and the pair of electrodes, the sealing spacer has a plurality of accommodating spaces, and each of the nanoporous semiconductor films of the photoelectrode is located in each of the accommodating spaces of the sealing spacer; an electrolyte is filled in the And the light-receiving device of claim 1 is disposed on the light-incident surface of the light electrode, and each of the light-guiding members of the light-harvesting device corresponds to the spacer, and the light Each of the slots of the capture device corresponds to each of the nanoporous semiconductor thin films of the photoelectrode. The dye-sensitized solar cell structure of claim 9, wherein the first connecting member and the second connecting member of the light capturing device are fixed to a light incident surface of the photoelectrode.