CN101312220B - Two-sided light-absorbing and electricity-generating thin film solar battery - Google Patents
Two-sided light-absorbing and electricity-generating thin film solar battery Download PDFInfo
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- CN101312220B CN101312220B CN2007101045086A CN200710104508A CN101312220B CN 101312220 B CN101312220 B CN 101312220B CN 2007101045086 A CN2007101045086 A CN 2007101045086A CN 200710104508 A CN200710104508 A CN 200710104508A CN 101312220 B CN101312220 B CN 101312220B
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Abstract
Disclosed is film solar cell with dual-surface capable of absorbing light and generating power. The film solar cell comprises a first transparent substrate, a second transparent substrate, a first solar cell module, a second solar cell module and an insulation layer, the first solar cell module is placed on the first transparent substrate, wherein a metal layer is utilized as one electrode of the first solar cell module and a light reflecting layer, the insulation layer is placed on the metal layer of the first solar cell module, and the second solar cell module is placed between the insulation layer and the second transparent substrate.
Description
Technical field
The invention relates to a kind of solar cell, and particularly relevant for a kind of solar cell that can two-sided light-absorbing and electricity-generating.
Background technology
Along with the policy popularization of government and the trend of carbon dioxide decrement, the future architecture thing is integrated solar cell will have increasing trend.Solar cell can be seated in the roof, but the metropolitan area that is small in area but densely populated, its space is limited, and the installing area is not too large.But the glass curtain wall area of building facade is big, is the following available zone of solar cell.Wherein, especially thin film solar cell can access electric power and not lose attractive in appearance again.But, how to increase the electric power of the single module of its solar cell, will be important problem.
Summary of the invention
For addressing the above problem, the invention provides a kind of thin film solar cell of two-sided light-absorbing and electricity-generating, it comprises first and second transparency carrier, first and second solar battery module and insulating barrier.First solar battery module is positioned on first transparency carrier, wherein also has metal level, as a wherein electrode of first solar battery module and as reflection layer.Insulating barrier is positioned on the metal level of first solar battery module.Second solar battery module is between the insulating barrier and second transparency carrier.In addition, above-mentioned insulating barrier also can replace by cementing layer.
Above-mentioned first and second transparency carrier can for example be perspex substrate or transparent glass substrate.First and solar battery cell can be constituted by amorphous silicon, or by stacking structure that amorphous silicon and microcrystal silicon constituted.In addition, aforesaid gummed step can be utilized the ethyl vinyl acetate (ethyl vinylacetate EVA) carries out.
By above-mentioned structure, light passes the perspex substrate or glass substrate shines solar battery cell, to carry out the program of transform light energy electric energy.In addition, unabsorbed light more can make light get back to solar battery cell by the reflection of metal level, carries out the program of transform light energy electric energy again.Therefore, because metal level can reflect incident light (sunlight and room light etc.), so the utilization rate of sunlight and room light can promote, and then generating efficiency also can more promote.
State with other purposes, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Figure 1A to 1H illustrates the manufacturing process schematic diagram of the embodiment of the invention;
Fig. 2 illustrates the application examples of the thin film solar cell of two-sided light-absorbing and electricity-generating of the present invention;
Fig. 3 A to 3H illustrates the manufacturing process schematic diagram of another embodiment of the present invention.
The main element symbol description
100,200: transparency carrier
102,202: transparency conducting layer (electrode)
104,204: the first solar battery cells
106,206: metal level (electrode)
108,208: insulating barrier
110,216: conductive layer/transparency conducting layer (electrode)
112,214: the second solar battery cells
114,212: transparency conducting layer (electrode)
120,210: the second transparency carriers
130,220: ethyl vinyl acetate (EVA)
Embodiment
The present invention mainly is the thin film solar cell that proposes a kind of two-sided light-absorbing and electricity-generating, and it utilizes the metal level of tool reflex, as a wherein electrode of solar cell, in order to be reflected into irradiating light beam, with the service efficiency of increase light, and increases generating efficiency.Below just describe embodiments of the invention in detail.
As shown in Figure 1, at first provide a transparency carrier 100, this transparency carrier 100 can be plastic substrate or glass substrate.Then on transparency carrier 100, form a transparency conducting layer 102, for example be oxidic, transparent, conductive layers (transparent conductive oxide layer, TCO layer) 102, with these transparency conducting layer 102 patternings, make its usefulness afterwards as the electrode of solar battery cell.The material of transparency conducting layer can for example be ZnO, SnO
2Or other any suitable materials etc.After substrate 100 forms transparency conducting layer, can carry out patterning to transparency conducting layer via laser engraving modes such as (laser scriber), to form patterned transparent conductive layer 102.
Then, shown in Figure 1B, on patterned transparent conductive layer 102, form a plurality of solar battery cells 104.Solar battery cell 104 for example is the three-layer thin-film of P type, I type (that is Intrinsical (intrinsic)) and the N type of growth amorphous silicon.Solar battery cell 104 also can be the type that stacks (tandem) structure by three layers of stacking structure of the type that stacks (tandem) structure of amorphous silicon and microcrystal silicon six layers (2 groups P, I and N type) or amorphous silicon (1 group P, I and N type) and amorphous silicon germanium (2 groups P, I and N type) or amorphous silicon and crystallite SiGe six layers (2 groups P, I and N type).Afterwards via laser engraving modes such as (laser scriber) with these solar battery cell 104 patternings, make itself and contiguous solar battery cell isolated.
Then, shown in Fig. 1 C, after solar battery cell 104 forms, continue to form metal level 106 thereon.Afterwards via laser engraving modes such as (laser scriber) with these metal level 106 patternings, make itself and adjacent metal electrode isolated.This metal level 106 is on the one hand as the another one electrode of aforementioned each solar battery cell 104, and on the one hand also as the usefulness of reflection source, the back can be done explanation again.For convenience of description, some situation can be called first solar battery module with metal level 106 with this transparency conducting layer 102, solar battery cell 104 hereinafter.
Above-mentioned metal level 106 and transparency conducting layer 102 respectively as the usefulness of the electrode of each solar battery cell 104, make each solar battery cell 104 carry out the function of transform light energy electric energy behind patterning.In addition, metal level 106 and transparency conducting layer 102 behind patterning each electrode and each solar battery cell 104 for corresponding to each other.Corresponded manner at this can be according to design, and for example the mode of serial or parallel connection is carried out.With Fig. 1 C is example, solar battery cell 104 correspondences are formed on two adjacent electrodes of transparency conducting layer, to the electrode of metal level that should solar battery cell 104 is on being formed in this solar battery cell 104, also be electrically connected, use the arrangement mode that constitutes series connection with the pairing electrode in adjacent solar cell unit (transparency conducting layer 102).
Then, form an insulating barrier 108 on whole metal level 106, it is shown in Fig. 1 D.This insulating barrier 108 can also can carry out electrical isolation with second solar battery module of first solar battery module and follow-up formation to each other with each electrode of metal level 106 electrical isolation in addition.The technology that the method that forms insulating barrier can utilize deposition etc. generally to know is carried out, and it limits especially.Insulating barrier for example can be non-conductive oxide skin(coating), but so long as can reach the purpose that is electrically insulated, its material limits especially.
Shown in Fig. 1 E, on insulating barrier 108, continue to form a conductive layer 110.This conductive layer then carries out patterning, to form a plurality of electrodes.Those electrodes are easily as the electrode of aftermentioned solar battery cell.In addition, as mentioned above, this conductive layer 110 can including transparent conducting oxide layer.In addition, conductive layer 110 also can be a metal level, and this metal level also has function of reflecting, can be with sunlight reflected back solar battery cell again.
Shown in Fig. 1 F, the conductive layer 110 (electrode) behind patterning is gone up and is formed a plurality of second solar battery cells 112.Similarly, the three-layer thin-film of this solar battery cell 112 P type that for example is the growth amorphous silicon, I type (that is Intrinsical (intrinsic)) and N type.Solar battery cell 112 also can be the type that stacks (tandem) structure by three layers of stacking structure of the type that stacks (tandem) structure of amorphous silicon and microcrystal silicon six layers (2 groups P, I and N type) or amorphous silicon (1 group P, I and N type) and amorphous silicon germanium (2 groups P, I and N type) or amorphous silicon and crystallite SiGe six layers (2 groups P, I and N type).In the present embodiment, first and second solar battery cell 104,112 does not limit must use any type, and the solar battery cell of any kind all can be applied.
Afterwards, form transparency conducting layer 114 on each solar battery cell 112, and be patterned into and be electrode, it is shown in Fig. 1 G.
At last, shown in Fig. 1 H, second transparency carrier 120 is glued to transparency conducting layer 114, finishes the encapsulation of thin film solar cell of the two-sided light-absorbing and electricity-generating of present embodiment.Second transparency carrier can be transparent glass substrate.In above-mentioned gummed step, (ethyl vinylacetate, EVA) 130 cementing layer are glued to this second transparency carrier 120 on the transparency conducting layer 114, finishing encapsulation, or the glueing material that uses other to be fit to can for example to use the ethyl vinyl acetate.
Fig. 2 illustrates the application examples of the thin film solar cell of two-sided light-absorbing and electricity-generating of the present invention.As shown in Figure 2, the thin film solar cell of two-sided light-absorbing and electricity-generating is for example as the glass curtain wall in building building.
In the example of Fig. 2, it is the exterior wall of glass curtain wall that glass substrate 120 can be used as, and it is indoor wall wall that plastic substrate or glass substrate 100 then can be used as.At outdoor section, sunlight passes glass substrate 120 and shines solar battery cell 112, to carry out the program of transform light energy electric energy.In addition, unabsorbed sunlight more can make light get back to solar battery cell 112 by the reflection of metal level 106, carries out the program of transform light energy electric energy again.
In like manner, also has identical effect at indoor section.Indoor light passes the perspex substrate or glass substrate 100 shines solar battery cell 104, to carry out the program of transform light energy electric energy.In addition, unabsorbed indoor light more can make light get back to solar battery cell 104 by the reflection of metal level 106, carries out the program of transform light energy electric energy again.Therefore, because metal level can reflected sunlight and room light, so the utilization rate of sunlight and room light can promote, and then generating efficiency also can more promote.
Structurally, use a metal level just can achieve the above object, but also can also utilize metal level to form above-mentioned conductive layer 110, so that reflectivity is better.
As previously mentioned, selecting for use of solar battery cell, do not limited especially.But in general, the made solar cell of amorphous silicon has photoelectric conversion efficiency preferably under low luminous intensity; Therefore, for Fig. 2 be used in the situation of building the time, solar battery cell 104 can use the made solar cell of amorphous silicon, and solar battery cell 112 can use amorphous silicon and the made solar cell of microcrystal silicon.
In addition, selecting for use of substrate, when considering lightweight, can simultaneously use the perspex substrate, another side uses glass substrate.
Then, utilize Fig. 3 A to 3H, the manufacture method of another embodiment of the present invention is described.Last embodiment is the mode with continuous processing, and each layer of thin film solar cell in layer stacked formation.Ensuing embodiment makes solar battery module on transparency carrier, afterwards again in the gummed mode, two groups of solar battery modules are composed the thin film solar cell of two-sided light-absorbing and electricity-generating.
At first with reference to figure 3A, at first provide a transparency carrier 200, this transparency carrier 200 can be plastic substrate or glass substrate.Then on transparency carrier 200, form a transparency conducting layer 202, with these transparency conducting layer 202 patternings, make its usefulness afterwards as the electrode of solar battery cell.The material of transparency conducting layer can for example be ZnO, SnO
2Or other any suitable materials etc.A same embodiment, transparency conducting layer 202 can carry out patterning via modes such as laser engravings, to form electrode pattern.
Then, shown in Fig. 3 B, on transparency conducting layer 202, form a plurality of solar battery cells 204.Solar battery cell 204 for example is P, the I of growth amorphous silicon and the three-layer thin-film of N type.Solar battery cell 204 also can be the type that the stacks structure by amorphous silicon and microcrystal silicon six layers (2 groups P, I and N type).Then, shown in Fig. 3 C, after solar battery cell 204 forms, continue to form metal level or metal coating 206 thereon.This metal level 206 is on the one hand as the another one electrode of solar battery cell 204, on the one hand also as the usefulness of reflection source.
In like manner, shown in Fig. 3 D to 3F, on second transparency carrier 210, form transparency conducting layer 212, a plurality of solar battery cell 214 and conductive layer 216 in regular turn.Transparency conducting layer 212 is also identical with the explanation of Fig. 3 A to 3C with the use material with the structure of solar battery cell 214, in this few explanation.In addition, the conductive layer 216 of Fig. 3 F can be made of including transparent conducting oxide layer.Conductive layer 216 also can have the metal level of reflection function and form, so that sunlight at reflected back solar battery cell 214, increases generating efficiency.
At last, shown in Fig. 3 G, two groups of solar battery modules with Fig. 3 C and 3F are packaged together in the gummed mode, finish the thin film solar cell of the two-sided light-absorbing and electricity-generating shown in Fig. 3 H.Identical with last embodiment, this gummed step can utilize ethyl vinyl acetate (EVA) 220 to finish encapsulation.
In sum, by the thin film solar cell of two-sided light-absorbing and electricity-generating of the present invention, light can pass the perspex substrate or glass substrate shines solar battery cell, to carry out the program of transform light energy electric energy.In addition, unabsorbed light more can make light get back to solar battery cell by the reflection of metal level, carries out the program of transform light energy electric energy again.Therefore, because metal level can reflected sunlight and room light etc., so the utilization rate of sunlight and room light can promote, and then generating efficiency also can more promote.
In addition, the present invention more can utilize amorphous silicon still can absorb the advantage of most of spectrum and generation electric power at visible light, integrating amorphous silicon and two kinds of thin film solar cells of amorphous silicon (a-Si)/microcrystal silicon (μ c-Si) is one, but becomes the solar battery element of two-sided all extinctions.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the accompanying Claim person of defining.
Claims (23)
1. the thin film solar cell of a two-sided light-absorbing and electricity-generating comprises:
First and 1 second transparency carrier;
First solar battery module is positioned on this first transparency carrier, wherein also has the first metal layer, as the usefulness of the wherein electrode of this first solar battery module and as reflection layer;
Insulating barrier is positioned on this metal level of this first solar battery module; And
Second solar battery module is between this insulating barrier and this second transparency carrier.
2. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 1, wherein this first transparency carrier is perspex substrate or transparent glass substrate.
3. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 1, wherein this second transparency carrier is a transparent glass substrate.
4. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 1, wherein this first solar battery module also comprises:
First transparency conducting layer is patterned to a plurality of electrodes;
A plurality of first solar battery cells should dispose with those electrode pairs respectively; And
This first metal layer is patterned to a plurality of electrodes, respectively with the corresponding configuration of those first solar battery cells.
5. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 1, wherein this second solar battery module comprises:
Second transparency conducting layer is patterned to a plurality of electrodes, and is positioned on this insulating barrier;
A plurality of second solar battery cells are positioned on this second transparency conducting layer, and should dispose with those electrode pairs of this second transparency conducting layer respectively; And
The 3rd transparency conducting layer is patterned to a plurality of electrodes, be positioned on those second solar battery cells and respectively with the corresponding configuration of those second solar battery cells.
6. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 5 wherein also comprises cementing layer, in order to glue together the 3rd transparency conducting layer and this second transparency carrier.
7. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 6, wherein this cementing layer is an ethyl vinyl acetate layer.
8. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 1, wherein this second solar battery module comprises:
Second metal level is patterned to a plurality of electrodes, and is positioned on this insulating barrier;
A plurality of second solar battery cells are positioned on this second metal level, and should dispose with those electrode pairs of this second metal level respectively; And
Transparency conducting layer is patterned to a plurality of electrodes, be positioned on those second solar battery cells and respectively with the corresponding configuration of those second solar battery cells.
9. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 8 wherein also comprises cementing layer, in order to glue together this transparency conducting layer and this second transparency carrier.
10. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 9, wherein this cementing layer is an ethyl vinyl acetate layer.
11. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 4, wherein respectively this first solar battery cell is constituted by amorphous silicon, or by stacking structure that amorphous silicon and microcrystal silicon constituted.
12. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 5, wherein respectively this second solar battery cell is constituted by amorphous silicon, or by stacking structure that amorphous silicon and microcrystal silicon constituted.
13. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 6, wherein respectively this second solar battery cell is constituted by amorphous silicon, or by stacking structure that amorphous silicon and microcrystal silicon constituted.
14. the thin film solar cell of a two-sided light-absorbing and electricity-generating comprises:
First and 1 second transparency carrier;
First solar battery module is positioned on this first transparency carrier, wherein also has the first metal layer, as the usefulness of the wherein electrode of this first solar battery module and as reflection layer;
Cementing layer is positioned on this metal level of this first solar battery module; And
Second solar battery module is between this cementing layer and this second transparency carrier.
15. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 14, wherein this first transparency carrier is perspex substrate or transparent glass substrate.
16. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 14, wherein this second transparency carrier is a transparent glass substrate.
17. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 14, wherein this first solar battery module also comprises:
First transparency conducting layer is patterned to a plurality of electrodes;
A plurality of first solar battery cells should dispose with those electrode pairs respectively; And
This first metal layer is patterned to a plurality of electrodes, respectively with the corresponding configuration of those first solar battery cells.
18. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 14, wherein this second solar battery module comprises:
Second transparency conducting layer is patterned to a plurality of electrodes, and is positioned on this cementing layer;
A plurality of second solar battery cells are positioned on this second transparency conducting layer, and should dispose with those electrode pairs of this second transparency conducting layer respectively; And
The 3rd transparency conducting layer is patterned to a plurality of electrodes, be positioned on those second solar battery cells and respectively with the corresponding configuration of those second solar battery cells.
19. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 14, wherein this second solar battery module comprises:
Second metal level is patterned to a plurality of electrodes, and is positioned on this cementing layer;
A plurality of second solar battery cells are positioned on this second metal level, and should dispose with those electrode pairs of this second metal level respectively; And
Transparency conducting layer is patterned to a plurality of electrodes, be positioned on those second solar battery cells and respectively with the corresponding configuration of those second solar battery cells.
20. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 17, wherein respectively this first solar battery cell is constituted by amorphous silicon, or by stacking structure that amorphous silicon and microcrystal silicon constituted.
21. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 18, wherein respectively this second solar battery cell is constituted by amorphous silicon, or by stacking structure that amorphous silicon and microcrystal silicon constituted.
22. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 19, wherein respectively this second solar battery cell is constituted by amorphous silicon, or by stacking structure that amorphous silicon and microcrystal silicon constituted.
23. the thin film solar cell of two-sided light-absorbing and electricity-generating as claimed in claim 14, wherein this cementing layer is an ethyl vinyl acetate layer.
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| CN2007101045086A CN101312220B (en) | 2007-05-25 | 2007-05-25 | Two-sided light-absorbing and electricity-generating thin film solar battery |
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| CN2007101045086A CN101312220B (en) | 2007-05-25 | 2007-05-25 | Two-sided light-absorbing and electricity-generating thin film solar battery |
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| CN101312220B true CN101312220B (en) | 2010-06-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102760790A (en) * | 2011-04-29 | 2012-10-31 | 宇通光能股份有限公司 | Thin film solar cell and method for manufacturing same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103137758A (en) * | 2013-03-11 | 2013-06-05 | 常州天合光能有限公司 | Double-sided solar cell module composited by crystalline silicon solar cell and hull cell |
| CN107272235A (en) * | 2017-05-12 | 2017-10-20 | 惠科股份有限公司 | Display device and active array switch substrate thereof |
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| CN101312220A (en) | 2008-11-26 |
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