CN101393941A - Fluorescent flat optical waveguide solar cell photovoltaic power generation system - Google Patents
Fluorescent flat optical waveguide solar cell photovoltaic power generation system Download PDFInfo
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- CN101393941A CN101393941A CNA2008101944490A CN200810194449A CN101393941A CN 101393941 A CN101393941 A CN 101393941A CN A2008101944490 A CNA2008101944490 A CN A2008101944490A CN 200810194449 A CN200810194449 A CN 200810194449A CN 101393941 A CN101393941 A CN 101393941A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention relates to a fluorescent planar optical wave guide solar-cell photovoltaic generation system, and aims to form the fluorescent planar optical wave guide solar-cell photovoltaic generation system by combining a fluorescent material, the planar optical wave guide technology and solar cells so as to reduce the cost of solar-cell photovoltaic generation. The system for the invention comprise a fluorescent planar optical wave guide and the solar cells; as a flake-shaped optical structure, the fluorescent planar optical wave guide is composed of a transparent medium layer and a fluorescent material layer; and the solar cells are arranged on side surfaces of the fluorescent planar optical wave guide through scotch tapes. The beneficial technical effect of the invention leads to the realization of using the solar cells arranged on the side surfaces to receive light supposed to arrive at the whole surfaces, thereby achieving great equivalent light concentration effects. The fact that the cost of the fluorescent planar optical wave guide is far less that that of the solar cells results in a heavy decrease in the quantity of the solar cells for use with the cost of the solar power photovoltaic generation greatly reduced.
Description
Technical field
The present invention relates to the photovoltaic generating system that a kind of planar optical waveguide of utilizing fluorescent material to make is caught sunlight and converted thereof into fluorescence input solar cell.
Background technology
Along with the fast development of global economy, the consumption sharp increase of the energy.The flood tide of fossil fuel uses and has not only caused the day by day exhausted of non-renewable resources such as oil, coal, natural gas, threatens the energy security of human society, and a large amount of CO
2Discharging also caused serious day by day social environment problem.Therefore, the development and use of various regenerative resources are subjected to increasing attention.
In various regenerative resources, characteristics such as solar energy is inexhaustible, nexhaustible, pollution-free with it, facility become the object of giving priority to.
The scheme of utilizing of solar energy mainly comprises photo-thermal and photovoltaic two big classes, wherein succinct, long-life of photovoltaic generation, system efficient with it, maintenance is simple and enjoy favor, becomes the mainstream technology that solar energy utilizes.
The core parts of photovoltaic generation are solar cells.Solar cell can be divided into inorganic, organic, compound (fuel sensitization) by the kind of material; Can be divided into body material, film, lamination by structure; And can be divided into monocrystalline, polycrystalline and amorphous by the form of material.In the solar cell of numerous kinds, the most ripe with the technology of single crystalline Si and polycrystalline Si, market share maximum (～90%) is a main flow in the market.
The maximum bottleneck of solar cell large-scale application is a price.At present the price of Si solar cell is about 3.5$/Wp, and life-cycle cost of electricity-generating～0.15$/kWh is about 10 times of thermal power generation, is difficult to popularize.Therefore, raising the efficiency, reducing cost is the research emphasis of solar cell.
People have attempted many approach and have improved the efficient of solar cell, the cost of reduction solar cell, but all fail to solve well this to contradiction.For example: the efficient of compound solar cell, lamination solar cell is than Si solar energy height, but cost is also high; And the concentrating solar battery that utilizes optical focus can reduce the consumption of solar cell significantly, but the decrease in efficiency that heating causes, the cost of cooling system and tracking system rises and has offset the minimizing of solar cell consumption again.
Summary of the invention
The objective of the invention is to combine with solar cell, construct a kind of photovoltaic generating system of fluorescent flat optical waveguide solar cell, to reduce the cost of solar energy power generating by fluorescent material, plane light wave waveguide technology.
Fluorescent flat optical waveguide solar cell photovoltaic power generation system comprises fluorescent flat optical waveguide and solar cell;
Described fluorescent flat optical waveguide is a kind of length, the width sheet-form optical structure much larger than thickness.
Described fluorescent flat optical waveguide comprises transparent dielectric layer and fluorescent material layer.
Described transparent dielectric layer is glass or transparent polymer (polymethyl methacrylate) or other transparent medium.
Described fluorescent material is the radiation that can absorb a certain wavelength (or wave band), emits the material of another wavelength (or wave band) radiation.Fluorescent material of the present invention is meant and can absorbs sunlight, sending solar cell can absorbing wavelength fluorescence (to crystal silicon solar energy battery, wavelength＜1100nm; For gallium arsenide solar cell, wavelength＜840nm; For phosphorus gallium indium solar cell, wavelength＜650nm etc.) material.Be subjected to the restriction of planar optical waveguide, satisfy the fluorescence of certain condition, can in planar optical waveguide, propagate very long distance.
Solar cell is set in four sides of fluorescent flat optical waveguide forms coupling optical path.
The sheet fluorescent flat optical waveguide is a parallelogram, and one to three in four sides of fluorescent flat optical waveguide is provided with reflectance coating, and remaining side is provided with solar cell, and described reflective film material is aluminium or silver or gold.
The fluorescent material layer of described fluorescent flat optical waveguide and transparent medium laminar surface are provided with selective reflecting layer, and the wherein non-sunlight plane of incidence can be provided with reflectance coating; Described selective reflecting layer is a photonic crystal, or the high anti-coating of optics, and described reflective film material is aluminium or silver or gold.
Structure of the present invention as shown in Figure 1.Fluorescent flat optical waveguide solar cell photovoltaic power generation system comprises fluorescent flat optical waveguide and solar cell 3; Fluorescent flat optical waveguide is by transparent dielectric layer 1, and fluorescent material layer 2 is formed, and four sides are provided with solar cell 3.Its operation principle is: when sunlight 4 from the top or when the below is radiated at fluorescent flat optical waveguide, fluorescent material absorbs sunlight, sends fluorescence.The fluorescence that is produced evenly distributes on all directions.
As shown in Figure 2, a series of reflection, refraction take place in described fluorescence on the interface of fluorescent material layer 2 and transparent dielectric layer 1, arrive upward (transparent medium/air interface), following (fluorescent material/air interface) surface of fluorescent flat optical waveguide, in the time of in it is in the angle of total reflection that transparent medium refractive index (upper surface), fluorescent material refractive index (lower surface) determined, total reflection will take place on upper and lower surface in described fluorescence, and fluorescent flat optical waveguide turns back.Like this, fluorescence until reaching four side outgoing, is coupled into solar cell 3 by reflecting one by one, reflect in fluorescent flat optical waveguide to the transmission of the side of fluorescent flat optical waveguide, is converted to electric energy output.
Consider the rectangle fluorescent flat optical waveguide of length of side l, wide d, thickness (comprising transparent dielectric layer and fluorescence coating) t, its area is S=l * d, and the gross area of 4 sides is 2 (l+d) t.The fluorescent materials quantum efficiency is η, and the ratio that the fluorescence that satisfies total reflection condition accounts for whole fluorescence is α, and the luminous flux that then enters solar cell is:
I＝I
0l×d·αη
I wherein
0Be intensity of sunlight.Compare with sunlight direct irradiation solar cell, light intensity has increased:
Doubly.
This shows, useful technique effect of the present invention is the illumination with the fluorescent flat optical waveguide surface, focus on the very little side of fluorescent flat optical waveguide in conjunction with the planar optical waveguide transmission by the fluorescence conversion, thereby realize accepting the illumination of surface size, reach very big equivalent spotlight effect with the solar cell of side size.Because the cost of fluorescent flat optical waveguide is far below solar cell, the present invention has greatly reduced the consumption of solar cell, has also just greatly reduced the cost of solar energy power generating.
Optical concentration with routine is compared, the present invention need not tracking system, also can not produce serious thermal effect, because what enter solar cell is useful fluorescence, the infrared radiation that only produces thermal effect in the sunlight can only shine on the fluorescent flat optical waveguide, and can not enter solar cell.
Referring to Fig. 3, overflow from the lower surface of fluorescent flat optical waveguide in order to prevent fluorescence, reflectance coating 5 (for clarity, positive solar cell does not draw) can be set at the lower surface of fluorescent flat optical waveguide, this moment, sunlight can only be from upper surface incident.Described reflective film material is aluminium or silver or gold.
Referring to Fig. 4, in order further to reduce the consumption of solar cell, parallel tongue and groove 6 can be set on the surface of fluorescent flat optical waveguide, fluorescence can only be transmitted to two sides along the direction that is parallel to tongue and groove 6, promptly only establish solar cell, thereby solar cell is kept to two from four in fluorescent flat optical waveguide two sides perpendicular to tongue and groove 6.Further, also can be with substituting with offside reflection film 7, shown in 7 among Fig. 4 perpendicular to one in two solar cells of tongue and groove 6.The fluorescence that offside reflection film 7 will arrive this side reflects back, and is coupled into solar cell from opposite side.
Referring to Fig. 5, in order to reduce the consumption of solar cell, also parallel tongue and groove can be set, directly replace with offside reflection film 7 with three in four side solar cells.
Referring to Fig. 6, in order to increase the ratio (also promptly increasing α) that transmission fluorescence accounts for whole fluorescence, also can selective reflecting layer 8 at wavelength of fluorescence be set, or upper and lower surface all is provided with the selective reflecting layer (this moment, lower surface was not provided with the reflector) at wavelength of fluorescence at fluorescence fiber waveguide upper surface.Selective reflecting layer is the high anti-coating of photonic crystal or optics.Photonic crystal is a kind of material that is formed by the material periodic arrangement of two kinds of different refractivities.Photonic crystal has different reflectivity and transmissivity to the light of different wave length, and this wavelength dependence can be by shape, the refractive index of two kinds of materials of photonic crystal, and the size in arrangement cycle etc. is adjusted.Photonic crystal among the present invention is selected at optical fiber institute emitted fluorescence wavelength specially, and reflected fluorescent light sees through sunlight.Described photonic crystal also can be provided with the periodicity convex-concave at optical fiber surface and realize, as Fig. 7.At this moment, air and transparent medium, air and fluorescent material have constituted the material of two kinds of different refractivities of photonic crystal.And optical coating is a mature technique, is widely used in the optical elements such as anti-reflection and interferometric filter on camera lens surface.Wherein high anti-plated film is made of the high and low refractive index material layer of alternating deposit, and the thickness of each coating is 1/4th of institute's reverberation wavelength.The high anti-coating of optics of the present invention is specially at fluorescence optical fiber institute emitted fluorescence wavelength, and reflected fluorescent light sees through sunlight.
Referring to Fig. 8, Fig. 9 and Figure 10, in order further to reduce the consumption of solar cell, planar optical waveguide can be done wedgewise or rescinded angle polygon, at the polygonal long side face of rescinded angle the reflector is set, only solar cell is set in the short side.
Above-mentioned measure can be used in combination.
If as transparent medium, utilize the flexible characteristics of polymer with transparent polymer, described fluorescent flat optical waveguide solar cell photovoltaic power generation system will have flexible characteristics, suitable mobile portable use.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is reflection, the refraction schematic diagram of fluorescence of the present invention in fiber waveguide.
Fig. 3 is the schematic diagram that lower surface of the present invention is provided with the reflector.
Fig. 4 is that upper surface of the present invention is provided with the schematic diagram that cutting and side are provided with the reflector.
Fig. 5 is the schematic diagram that three sides of the present invention are provided with the reflector.
Fig. 6 is the schematic diagram of upper surface selective reflecting layer of the present invention.
Fig. 7 is the structural representation of surface periodic convex-concave structure photonic crystal of the present invention.
Fig. 8 is a rescinded angle triangle fluorescent flat optical waveguide solar photovoltaic generating system structure of the present invention.
Fig. 9 is rescinded angle quadrangle of the present invention (cutting four a jiaos) fluorescent flat optical waveguide solar photovoltaic generating system structure.
Figure 10 is rescinded angle quadrangle of the present invention (cutting an a jiao) fluorescent flat optical waveguide solar photovoltaic generating system structure.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described by embodiment.
Embodiment 1:
Referring to Fig. 1, Fig. 3 and Fig. 5, with the common luminous organic coordination compound (Eu of the rare earth of 5wt%
0.05, La
0.4) (DBM)
3Phen (rare earth dibenzoyl methane phenanthroline complex) mixes polymethyl methacrylate (PMMA) matrix, is spun on the simple glass 1 that 3mm is thick, 1.5m is long, 0.5m is wide, forms the fluorescent material layer 2 of 10 micron thickness.(Al) reflectance coating 7 of aluminizing in the side of the side of two 1.5m of glass 1 and a 0.5m, another 0.5m side is with the gluing silicon solar cell 3 that connects of UV-3129 ultra-violet curing of Shenzhen letter meaning glue industry Co., Ltd.The refractive index of simple glass and PMMA all about 1.5, the numerical aperture 0.75 of respective planes fiber waveguide (also promptly 75% fluorescence enters transmission mode).This fluorescent material absorb the 300nm-400nm wave band sunlight (ultraviolet portion, account for global solar radiation 5%), the fluorescence of radiation 608nm-630nm, fluorescence efficiency is about 60%.Consider when sunlight enters fluorescent flat optical waveguide that there is 10% reflection loss on the fluorescent flat optical waveguide surface, total conversion efficiency is:
5％×90％×75％×60％＝2％
The surface area of fluorescent flat optical waveguide is: 1.5m * 0.5m=0.75m
2, the lateral area with the solar cell coupling of fluorescent flat optical waveguide is: 0.5m * 3mm=0.0015m
2Therefore, the increase of the light intensity on the solar cell (also being equivalent light concentrating times) is:
Doubly.For the 614nm fluorescence near monochrome, the efficient of gallium arsenide solar cell is about 40%, and system total efficiency is about 0.8%.
Because the fluorescent material that is spun on glass surface in the present embodiment only absorbs the ultraviolet portion of sunlight, see through visible light, and thickness has only 10 microns, therefore, do not influence the use of glass, can be as in glass pane or the roof glass, output is the electric energy (situation of sunlight normal incidence) of the most about 6W.
Embodiment 2:
Referring to Fig. 6 and Fig. 7, with the common luminous organic coordination compound (Eu of the rare earth of 5wt%
0.05, Tb
0.1) (DBM)
3Phen (rare earth dibenzoyl methane phenanthroline complex) mixes polymethyl methacrylate (PMMA) matrix, is spun on the polyethylene that 0.1mm is thick, 1m is long, 20cm is wide (PE) slide 1, forms the fluorescent material layer 2 of 10 micron thickness.Lower surface at fluorescent material layer 2 (Al) reflectance coating 5 of aluminizing is provided with efficient sunlight, the reflection (Eu of seeing through at the upper surface of slide 1
0.05, Tb
0.1) (DBM)
3The photonic crystal 8 of Phen wavelength of fluorescence, (Al) reflectance coating 7 of aluminizing in the side of the side of two 1m of slide 1 and a 20cm, another 20cm side is with the gluing gallium arsenide solar cell 3 that connects of UV-3129 ultra-violet curing of Shenzhen letter meaning glue industry Co., Ltd.This fluorescent material absorbs the sunlight (account for global solar radiation 25%) of 300nm-570nm, the fluorescence of radiation 608nm-630nm, and fluorescence efficiency is about 60%.Owing to be provided with photonic crystal at upper surface, lower surface is provided with the reflector, and all fluorescence all enter transmission mode, and total conversion efficiency is:
Sunlight enters the reflection of fluorescent flat optical waveguide can be ignored, and described fluorescence can not be from upper and lower surface and three plating Al side effusion fluorescent flat optical waveguides.
25％×60％＝15％
The surface area of fluorescent flat optical waveguide is: 1m * 20m=200cm
2, the lateral area with the solar cell coupling of fluorescent flat optical waveguide is: 20cm * 0.11mm=0.22cm
2Therefore, the increase of the light intensity on the solar cell (also being equivalent light concentrating times) is:
Doubly.For the 614nm fluorescence near monochrome, the efficient of gallium arsenide solar cell is about 70%, and system total efficiency is about 10%.
Since in the present embodiment transparent medium---polyethylene has flexible character, therefore, whole system has flexibility, realizes portable use.
Embodiment 3:
Referring to Fig. 4, in order further to reduce the consumption of solar cell, on the basis of embodiment 1, parallel tongue and groove 6 can be set on the surface of fluorescent flat optical waveguide, fluorescence can only be transmitted to two sides along the direction that is parallel to tongue and groove 6, promptly only establish solar cell 3, thereby the consumption of solar cell is kept to two from four in fluorescent flat optical waveguide two sides perpendicular to tongue and groove 6.Further, also can be with substituting with offside reflection film 7, shown in 7 among Fig. 4 perpendicular to one in two solar cells of tongue and groove 6.The fluorescence that offside reflection film 7 will arrive this side reflects back, and is coupled into solar cell from opposite side.
Embodiment 4:
Referring to Fig. 8, Fig. 9 and Figure 10, in order further to reduce the consumption of solar cell, on the basis of embodiment 2, can be with planar optical waveguide wedging or rescinded angle polygon, with place, long limit solar cell replace with offside reflection film 7 reflector, at the minor face place solar cell 3 is set.
Claims (8)
1, fluorescent flat optical waveguide solar cell photovoltaic power generation system is characterized in that:
Comprise fluorescent flat optical waveguide and solar cell;
Described fluorescent flat optical waveguide is a kind of sheet-form optical structure, comprises layer of transparent dielectric layer and another layer fluorescent material layer;
The fluorescent flat optical waveguide side is provided with solar cell respectively.
2, fluorescent flat optical waveguide solar cell photovoltaic power generation system according to claim 1 is characterized in that: described transparent medium layer material is glass or transparent polymer, and its thickness range is the 0.1-20 millimeter.
3, fluorescent flat optical waveguide solar cell photovoltaic power generation system according to claim 1, it is characterized in that: described fluorescent material is for can absorb sunlight, sending solar cell can the absorbing wavelength fluorescent material, the scope of its emit wavelength is to crystal silicon solar energy battery, wavelength＜1100nm; For gallium arsenide solar cell, wavelength＜840nm; For phosphorus gallium indium solar cell, the material of wavelength＜650nm; The fluorescent material layer thickness is the 0.5-100 micron.
4, fluorescent flat optical waveguide solar cell photovoltaic power generation system according to claim 1, it is characterized in that: described sheet fluorescent flat optical waveguide is a parallelogram, 1-3 side reflectance coating is set, other side is provided with solar cell by transparent adhesive tape.
5, fluorescent flat optical waveguide solar cell photovoltaic power generation system according to claim 4 is characterized in that: described reflective film material is aluminium or silver or gold.
6, fluorescent flat optical waveguide solar cell photovoltaic power generation system according to claim 4 is characterized in that: the transparent dielectric layer of described sheet fluorescent flat optical waveguide is laid with parallel tongue and groove with the fluorescent material laminar surface.
7, fluorescent flat optical waveguide solar cell photovoltaic power generation system according to claim 1, it is characterized in that: the fluorescent material layer of described fluorescent flat optical waveguide and transparent medium laminar surface are provided with selective reflecting layer, and the wherein non-sunlight plane of incidence can be provided with reflectance coating; Described selective reflecting layer is a photonic crystal, or the high anti-coating of optics, and described reflective film material is aluminium or silver or gold.
8, fluorescent flat optical waveguide solar cell photovoltaic power generation system according to claim 1, it is characterized in that: fluorescent flat optical waveguide be shaped as the rescinded angle polygon, at the polygonal long side face of rescinded angle the reflector is set, solar cell is set in the short side.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709376A (en) * | 2012-05-08 | 2012-10-03 | 常州天合光能有限公司 | Back plate integrated with fluorescent planar optical waveguide structure for solar battery module and application |
| CN103236462A (en) * | 2013-04-01 | 2013-08-07 | 重庆大学 | Efficient solar energy fluorescence condenser |
| CN103684241A (en) * | 2013-12-05 | 2014-03-26 | 北京大学 | Fiber photovoltaic building integration assembly and preparing method thereof |
| CN103855248A (en) * | 2012-11-30 | 2014-06-11 | 财团法人交大思源基金会 | Solar cell module and method for manufacturing same |
| CN104157715A (en) * | 2014-08-27 | 2014-11-19 | 四川钟顺太阳能开发有限公司 | Birefringence crystal condenser |
| CN105099358A (en) * | 2015-07-28 | 2015-11-25 | 南方科技大学 | Solar fluorescent focusing power generation system of quantum dot doped type, and manufacturing method therefor |
| CN106856396A (en) * | 2016-11-14 | 2017-06-16 | 中山大学 | A kind of plane fluorescent concentrator |
-
2008
- 2008-10-24 CN CNA2008101944490A patent/CN101393941A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102709376A (en) * | 2012-05-08 | 2012-10-03 | 常州天合光能有限公司 | Back plate integrated with fluorescent planar optical waveguide structure for solar battery module and application |
| CN103855248A (en) * | 2012-11-30 | 2014-06-11 | 财团法人交大思源基金会 | Solar cell module and method for manufacturing same |
| CN103855248B (en) * | 2012-11-30 | 2017-06-23 | 飞立威光能股份有限公司 | Solar cell module and method for manufacturing same |
| CN103236462A (en) * | 2013-04-01 | 2013-08-07 | 重庆大学 | Efficient solar energy fluorescence condenser |
| CN103684241A (en) * | 2013-12-05 | 2014-03-26 | 北京大学 | Fiber photovoltaic building integration assembly and preparing method thereof |
| CN103684241B (en) * | 2013-12-05 | 2016-01-20 | 北京大学 | A kind of fiber building integrated photovoltaic component and preparation method thereof |
| CN104157715A (en) * | 2014-08-27 | 2014-11-19 | 四川钟顺太阳能开发有限公司 | Birefringence crystal condenser |
| CN105099358A (en) * | 2015-07-28 | 2015-11-25 | 南方科技大学 | Solar fluorescent focusing power generation system of quantum dot doped type, and manufacturing method therefor |
| CN105099358B (en) * | 2015-07-28 | 2018-06-05 | 深圳扑浪创新科技有限公司 | A kind of manufacturing method of quantum dot-doped type solar energy fluorescence concentrating generating system |
| CN106856396A (en) * | 2016-11-14 | 2017-06-16 | 中山大学 | A kind of plane fluorescent concentrator |
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