CN204272009U - Photonic crystal concentrator - Google Patents
Photonic crystal concentrator Download PDFInfo
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- CN204272009U CN204272009U CN201420768121.6U CN201420768121U CN204272009U CN 204272009 U CN204272009 U CN 204272009U CN 201420768121 U CN201420768121 U CN 201420768121U CN 204272009 U CN204272009 U CN 204272009U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
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Abstract
The utility model discloses a kind of photonic crystal concentrator, comprise transparent glass casing, described glass casing side surface glass substrate inner surface is convexly equipped with at least two crystal medium posts, in described at least two crystal medium posts, each crystal medium post has identical predetermined refraction, and described at least two crystal medium posts only distribute according to predetermined rule in the first area and second area of described glass substrate inner surface, visible ray is made to exist and/or to propagate wherein, the space segment of described at least two crystal medium posts between described first area and second area forms optical channel, the predetermined rule distribution of at least two crystal medium posts described in breaking at described optical channel place makes visible ray can directly by this optical channel.The utility model can avoid unnecessary sunlight to be directly incident on solar-energy photo-voltaic cell, improves solar-energy photo-voltaic cell photoelectric conversion efficiency.
Description
Technical field
The utility model relates to concentrating photovoltaic power generation field, particularly makes sunlight project photonic crystal concentrator on photovoltaic cell for controlling sunlight propagation path.
Background technology
Solar energy have the restriction of clean, No Assets region, concerning the mankind forever without good characteristics such as exhaustions, be more and more subject to the favor of people, wherein solar energy photovoltaic utilization and the sunlight technology that is directly changed into electric energy by photovoltaic device is especially noticeable.
At present, a complete light gathering photovoltaic power generating system mainly comprises several parts such as concentration solar cell assembly, sun tracker, power storage or contravariant equipment.Concentration solar cell assembly, as photoelectric conversion part, formed with the circuit board being provided with photovoltaic battery wafers primarily of transmission-type or reflection-type beam condenser.Collector lens is made substantially just to sunniness direction by sun tracker during use, then respectively sunlight converged by these collector lenses and project on the receiving plane of photovoltaic battery wafers corresponding with each collector lens on circuit board, thus making generation current in each photovoltaic battery wafers, these electric currents are exported by the circuit on circuit board.In prior art during optically focused sunlight except to be converged by collector lens and to project photovoltaic battery wafers corresponding with each collector lens on circuit board upper outside, sunlight also can arrive photovoltaic battery wafers from the direct outgoing in other positions, solar-energy photo-voltaic cell temperature is raised, and then photoelectric conversion efficiency is reduced.
Utility model content
The purpose of this utility model is to overcome above-mentioned deficiency existing in prior art, provides a kind of photonic crystal concentrator, to avoid unnecessary sunlight to be directly incident on solar-energy photo-voltaic cell, improves solar-energy photo-voltaic cell photoelectric conversion efficiency.
In order to realize foregoing invention object, the technical solution adopted in the utility model is: a kind of photonic crystal concentrator, comprises transparent glass casing, and described glass casing side surface glass substrate inner surface is convexly equipped with at least two crystal medium posts; In described at least two crystal medium posts, each crystal medium post has identical predetermined refraction, and described at least two crystal medium posts only distribute according to predetermined rule in the first area and second area of described glass substrate inner surface, make visible ray to exist in described first area and second area and/or to propagate; The space segment of described at least two crystal medium posts between described first area and second area forms optical channel, and the described predetermined rule distribution of at least two crystal medium posts described in breaking at described optical channel place makes visible ray can directly by this optical channel.
Preferably, described first area and second area are rectangular area, and described at least two crystal medium posts are only specially according to predetermined rule distribution in the first area of described glass substrate inner surface and second area:
Described at least two crystal medium posts all distribute in array uniform intervals in the first area and second area of described glass substrate inner surface.
Preferably, it is the optical channel of rectangle that the part between described first area and second area forms cross section, and the width of described optical channel is greater than the distance in described first area or second area between adjacent crystal dielectric posts.
Preferably, the distance in described first area and second area between adjacent crystal dielectric posts is 0.436 ± 0.1 μm.
Preferably, the ratio of the distance in described at least two crystal medium posts between the radius of each crystal medium post and described adjacent crystal dielectric posts is 0.4.
Preferably, in described at least two crystal medium posts, the described predetermined refraction of each crystal medium post is 3.34 ± 0.15.
Preferably, in described at least two crystal medium posts, each crystal medium post is iodine crystal dielectric posts.
compared with prior art, the beneficial effects of the utility model: the glass casing side surface glass substrate inner surface of the utility model photonic crystal concentrator is convexly equipped with at least two crystal medium posts; In described at least two crystal medium posts, each crystal medium post has identical predetermined refraction, and described at least two crystal medium posts only distribute according to predetermined rule in the first area and second area of described glass substrate inner surface, make visible ray to exist in described first area and second area and/or to propagate; The space segment of described at least two crystal medium posts between described first area and second area forms optical channel, and the described predetermined rule distribution of at least two crystal medium posts described in breaking at described optical channel place makes visible ray can directly by this optical channel.Optical channel one end during use in casing arranges solar cell, when light enters to inject this concentrator from upper surface, visible ray can from the fault location of breaking crystal dielectric posts aligned transfer, namely optical channel place arrives solar cell, visible ray can not arrive solar cell from other position outgoing simultaneously, unnecessary sunlight is avoided to be directly incident on solar-energy photo-voltaic cell, thus solar cell temperature is decreased relative to traditional spot mode, and then photoelectric conversion efficiency is improved, it can realize round-the-clock non-tracking optically focused, simple and convenient cost is low.
accompanying drawing illustrates:
Fig. 1 is the photonic crystal concentrator external overall schematic diagram in the utility model embodiment;
Fig. 2 is the internal structure schematic diagram of Fig. 1;
Fig. 3 is the cutaway view of Fig. 1 along BB line;
Fig. 4 is the forbidden band scope light curve schematic diagram of the photonic crystal concentrator in the utility model embodiment.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail.But this should be interpreted as that the scope of the above-mentioned theme of the utility model is only limitted to following embodiment, all technology realized based on the utility model content all belong to scope of the present utility model.
Photonic crystal concentrator of the present utility model, comprises transparent glass casing, and described glass casing side surface glass substrate inner surface is convexly equipped with at least two crystal medium posts; In described at least two crystal medium posts, each crystal medium post has identical predetermined refraction, and described at least two crystal medium posts only distribute according to predetermined rule in the first area and second area of described glass substrate inner surface, make visible ray to exist in described first area and second area and/or to propagate; The space segment of described at least two crystal medium posts between described first area and second area forms optical channel, and the described predetermined rule distribution of at least two crystal medium posts described in breaking at described optical channel place makes visible ray can directly by this optical channel.
Optical channel one end when this photonic crystal concentrator uses in casing arranges solar cell, optical channel width can specifically set as required, adaptive with solar cell sizes, when light enters to inject this concentrator from upper surface, visible ray can from the predetermined rule of breaking crystal dielectric posts fault location arranged evenly, namely optical channel place arrives solar cell, visible ray can not arrive solar cell from other position outgoing simultaneously, unnecessary sunlight is avoided to be directly incident on solar-energy photo-voltaic cell, thus solar cell temperature is decreased relative to traditional spot mode, and then photoelectric conversion efficiency is improved, it can realize round-the-clock non-tracking optically focused, simple and convenient cost is low.Illustrate the utility model below.
Referring to Fig. 1-2, the photonic crystal concentrator of the present embodiment comprises transparent glass casing 1, and described glass casing 1 one side glass substrate 2 inner surface is convexly equipped with at least two crystal medium posts 3, the preferred iodine crystal dielectric posts of the present embodiment.In described at least two crystal medium posts 3, each crystal medium post has identical predetermined refraction, and described at least two crystal medium posts 3 only distribute according to predetermined rule in the first area 201 of described glass substrate 2 inner surface and second area 202, visible ray is made to exist in described first area 201 and second area 202 space and/or to propagate; The space segment of described at least two crystal medium posts 3 between described first area 201 and second area 202 forms optical channel 4, and the described predetermined rule distribution of at least two crystal medium posts 3 described in breaking at described optical channel 4 place makes visible ray can directly by this optical channel 4.
The utility model has the crystal medium post of predetermined refraction by using, control the propagation of light according to predetermined rule rule arranged evenly.Its principle is to exist in the crystal medium post of periodic law distributed architecture when what meet certain condition, and photon will form band structure, there is energy gap, be called in " forbidden band " between being with and being with, and frequency is that the light of forbidden band scope can not exist wherein and propagate.The utility model utilizes this principle, introduces defect passage, i.e. described optical channel, namely the passage of the cycle arrangement rule of breaking crystal dielectric posts, and frequency is that the light of forbidden band scope just penetrates by this defect (i.e. optical channel).The utility model is by the spatial arrangement of the refractive index and crystal medium post that arrange crystal medium post, the light of forbidden band scope is made to be in visible-range, this photonic crystal concentrator passes through defect (i.e. described optical channel) outgoing for the effective light of solar cell like this, solar cell receives in optical channel end, other light then can not arrive solar cell, thus realizes optically focused.Owing to having excluded useless light, the temperature of solar cell can be reduced, the conversion efficiency of solar cell is promoted further.
Concrete, in one example, in conjunction with referring to Fig. 1-3, described first district 201 and second area 202 are rectangular area, two area size are identical, described at least two crystal medium posts 3 are only specially according to predetermined rule distribution in the first area 201 of described glass substrate 2 inner surface and second area 202: described at least two crystal medium posts 3 all distribute in array uniform intervals in the first area 201 and second area 202 of described glass substrate 2 inner surface, crystal medium post 3 first area with 201 with second area 202 in distribute according to identical mode, the center of each row and column all crystals dielectric posts 3 point-blank, distance in first area 201 and second area 202 between adjacent crystal dielectric posts 3 is equal.Describedly can certainly to distribute according to other aligned transfer according to the distribution of predetermined rule, as triangular shaped periods distribution.Part between described first area 201 and second area 202 forms the optical channel 4 that cross section is rectangle, and the width of described optical channel 4 is greater than the distance in described first area 201 or second area 202 between adjacent crystal dielectric posts 3.Distance in described first area 201 and second area 202 between adjacent crystal dielectric posts 3 is 0.436 ± 0.1 μm.The ratio (i.e. normalization radius) of the distance in described at least two crystal medium posts 3 between the radius of each crystal medium post and described adjacent crystal dielectric posts is 0.4.In described at least two crystal medium posts 3, the described predetermined refraction of each crystal medium post is 3.34 ± 0.15.
At described first area 201 and second area 202 crystal medium post 3 according to predetermined rule (i.e. array uniform intervals distribution) arranged evenly, and break predetermined rule in optical channel 4 region arranged evenly, different at optical channel 4 place crystal medium post arrangement architecture mode and first area 201 and second area 202, namely the width of optical channel 4 is greater than the distance in described first area 201 or second area 202 between adjacent crystal dielectric posts 3.Optical channel 4 regional edge is the crystal medium post being positioned at first area 201 and second area 202 edge placement along both sides, spacing distance between the crystal medium post of its both sides is obviously wider than the distance in first area 201 and second area 202 between adjacent crystal dielectric posts, namely in first area 201 and second area 202, the periodicity of adjacent crystal dielectric posts arranged distribution does not exist in this place, and the cycle is broken.
The utility model is by the spatial arrangement of the refractive index and crystal medium post that arrange crystal medium post, the light of forbidden band scope is made to be in visible-range, this photonic crystal concentrator passes through defect (i.e. described optical channel) outgoing for the effective light of solar cell like this, solar cell receives in optical channel end, other light then can not arrive solar cell, thus realizes optically focused.Owing to having excluded useless light, the temperature of solar cell can be reduced, the conversion efficiency of solar cell is promoted further.
Test is made to photonic crystal concentrator performance of the present utility model below, solve Maxwell equation by plane wave expansion method and can obtain one group of eigenvalue equation, that is:
……①
……②
1., 2. formula is respectively the eigen[value of TE and TM pattern,
for the expansion coefficient of Fourier series, k is wave vector,
with
for the reciprocal lattice vector of photonic crystal,
for photon intrinsic circular frequency, c is the light velocity in vacuum.The electric field intensity that Ekn (G) is light wave is losing the component on k direction and crystal reciprocal lattice vector G direction perpendicular to ripple; The magnetic vector that Hkn (G) is light wave is losing the component on k direction and crystal reciprocal lattice vector G direction perpendicular to ripple.Ekn (
) losing k direction and crystal reciprocal lattice vector perpendicular to ripple for the electric field intensity of light wave
component on direction; Hkn (
) losing k direction and crystal reciprocal lattice vector perpendicular to ripple for the magnetic vector of light wave
component on direction.
The distance a got between adjacent crystal dielectric posts is 0.436 μm, and normalization radius (distance between crystal medium column radius/adjacent crystal dielectric posts) is 0.4, and described crystal medium post is among the air of described transparent cabinet.Determine that the value Γ of random selecting in Brillouin distributed area, X, m are as abscissa according to the spacing a of crystal medium post.Wherein Γ=2 π/a * [0,0] X=2 π/a * [1/2,0] m=2 π/a * [1/2,1/2].These three points of Γ, X, m are encircled a city a class delta-shaped region, i.e. the curve of bottom and the region in axis of abscissas besieged city, get any number and bring double counting in above formula into as parameter k and obtain curve chart in this triangle.Fig. 4 result can be obtained by MATLAB simulation.The light of forbidden band scope is the light of 0.36-0.78 mum wavelength as can be seen from Fig. 4.Namely the light of wavelength within the scope of this can pass through defect (i.e. optical channel) outgoing arrival solar cell.The value of random selecting in the Brillouin distributed area that what abscissa represented is determines according to the spacing of crystal medium post, what ordinate represented is wavelength, and this wavelength is according to frequency
calculating is converted to, and has done to process to make image more directly perceived herein.Distance between upper lower curve represents the forbidden band range wide of this point.Minimum widith in the region surrounded by two curves is bottom exactly the forbidden band range wide of this photonic crystal concentrator, i.e. 0.36-0.78 μm of scope.
The utility model can realize round-the-clock non-tracking optically focused, as long as light enters this photonic crystal concentrator from the upper surface plane of incidence, the light within the scope of forbidden band just can arrive solar cell from the fault location of crystal medium post arrangement.Simultaneously to the invalid light of solar cell then from other position outgoing, photonic crystal concentrator can not be entered and arrive solar cell, thus battery temperature is decreased relative to traditional spot mode, and then photoelectric conversion efficiency improves.
The manufacture method of photonic crystal concentrator as Figure 1-3, the method comprising the steps of:
The step of crystal medium post is connected: connect at least two crystal medium posts 3 in described glass substrate 2 surface crystallization projection, preferred iodine crystal dielectric posts in glass baseplate surface crystallization.In described at least two crystal medium posts 3, each crystal medium post has identical predetermined refraction, and described at least two crystal medium posts 3 only distribute according to predetermined rule in the first area 201 of described glass substrate 2 inner surface and second area 202, visible ray is made to exist in described first area 201 and second area 202 and/or to propagate; The space segment of described at least two crystal medium posts 3 between described first area 201 and second area 202 forms optical channel 4, and the described predetermined rule distribution of at least two crystal medium posts 3 described in breaking at described optical channel 4 place makes visible ray can directly by this optical channel 4.Described method for crystallising is prior art, no longer describes in detail herein.
Concrete, described first area 201 and second area 202 are rectangular area, and described at least two crystal medium posts 3 are only specially according to predetermined rule distribution in the first area 201 on described glass substrate 2 surface and second area 202: described in making, at least two crystal medium posts 3 all distribute in array uniform intervals in the first area 201 and second area 202 on described glass substrate 2 surface; Space segment between described first area 201 and second area 202 forms the optical channel 4 that cross section is rectangle, and the width of described optical channel 4 is greater than the distance in described first area 201 or second area 202 between adjacent crystal dielectric posts.
Wherein, the distance in described first area 201 and second area 202 between adjacent crystal dielectric posts is 0.436 ± 0.1 μm; The ratio of the distance in described at least two crystal medium posts 3 between the radius of each crystal medium post and described adjacent crystal dielectric posts is 0.4; In described at least two crystal medium posts 3, the described predetermined refraction of each crystal medium post is 3.34 ± 0.15.
Connect (as bonding) face glass in the surrounding of described glass substrate 2 and top that form crystal medium post 3, form the step of a transparent glass casing 1.
The utility model is by the spatial arrangement of the refractive index and crystal medium post that arrange crystal medium post, the light of forbidden band scope is made to be in visible-range, this photonic crystal concentrator passes through defect (i.e. described optical channel) outgoing for the effective light of solar cell like this, solar cell receives in optical channel end, other light then can not arrive solar cell, thus realizes optically focused.Owing to having excluded useless light, the temperature of solar cell can be reduced, the conversion efficiency of solar cell is promoted further.
Optical channel one end during use in casing arranges solar cell, optical channel width can specifically set as required, adaptive with solar cell sizes, when light enters to inject this concentrator from upper surface, visible ray can from the predetermined rule of breaking crystal dielectric posts fault location arranged evenly, namely optical channel place arrives solar cell, visible ray can not arrive solar cell from other position outgoing simultaneously, unnecessary sunlight is avoided to be directly incident on solar-energy photo-voltaic cell, thus solar cell temperature is decreased relative to traditional spot mode, and then photoelectric conversion efficiency is improved, it can realize round-the-clock non-tracking optically focused, simple and convenient cost is low.
By reference to the accompanying drawings embodiment of the present utility model is described in detail above, but the utility model is not restricted to above-mentioned execution mode, in the spirit and scope situation of claim not departing from the application, those skilled in the art can make various amendment or remodeling.
Claims (5)
1. a photonic crystal concentrator, is characterized in that, comprises transparent glass casing, and described glass casing side surface glass substrate inner surface is convexly equipped with at least two crystal medium posts; In described at least two crystal medium posts, each crystal medium post has identical predetermined refraction, and described at least two crystal medium posts only distribute according to predetermined rule in the first area and second area of described glass substrate inner surface, make visible ray to exist in described first area and second area and/or to propagate; The space segment of described at least two crystal medium posts between described first area and second area forms optical channel, and the described predetermined rule distribution of at least two crystal medium posts described in breaking at described optical channel place makes visible ray can directly by this optical channel;
wherein,described first area and second area are rectangular area, and described at least two crystal medium posts are only specially according to predetermined rule distribution in the first area of described glass substrate inner surface and second area: described at least two crystal medium posts all distribute in array uniform intervals in the first area and second area of described glass substrate inner surface; It is the optical channel of rectangle that part between described first area and second area forms cross section, and the width of described optical channel is greater than the distance in described first area or second area between adjacent crystal dielectric posts.
2. photonic crystal concentrator according to claim 1, is characterized in that, the distance in described first area and second area between adjacent crystal dielectric posts is 0.436 ± 0.1 μm.
3. photonic crystal concentrator according to claim 2, is characterized in that, the ratio of the distance in described at least two crystal medium posts between the radius of each crystal medium post and described adjacent crystal dielectric posts is 0.4.
4. the photonic crystal concentrator according to Claims 2 or 3, is characterized in that, in described at least two crystal medium posts, the described predetermined refraction of each crystal medium post is 3.34 ± 0.15.
5. photonic crystal concentrator according to claim 4, is characterized in that, in described at least two crystal medium posts, each crystal medium post is iodine crystal dielectric posts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420768121.6U CN204272009U (en) | 2014-12-08 | 2014-12-08 | Photonic crystal concentrator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420768121.6U CN204272009U (en) | 2014-12-08 | 2014-12-08 | Photonic crystal concentrator |
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| CN204272009U true CN204272009U (en) | 2015-04-15 |
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| CN201420768121.6U Withdrawn - After Issue CN204272009U (en) | 2014-12-08 | 2014-12-08 | Photonic crystal concentrator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485880A (en) * | 2014-12-08 | 2015-04-01 | 四川钟顺太阳能开发有限公司 | Photonic crystal condenser and manufacturing method thereof |
-
2014
- 2014-12-08 CN CN201420768121.6U patent/CN204272009U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104485880A (en) * | 2014-12-08 | 2015-04-01 | 四川钟顺太阳能开发有限公司 | Photonic crystal condenser and manufacturing method thereof |
| CN104485880B (en) * | 2014-12-08 | 2016-07-20 | 四川钟顺太阳能开发有限公司 | Photonic crystal condenser and preparation method thereof |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150415 Effective date of abandoning: 20160720 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |