CN108614314A - A kind of full spectral region perfection light absorber of solar energy - Google Patents
A kind of full spectral region perfection light absorber of solar energy Download PDFInfo
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- CN108614314A CN108614314A CN201810440165.9A CN201810440165A CN108614314A CN 108614314 A CN108614314 A CN 108614314A CN 201810440165 A CN201810440165 A CN 201810440165A CN 108614314 A CN108614314 A CN 108614314A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/003—Light absorbing elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/008—Surface plasmon devices
Abstract
A kind of visible near-infrared region broadband perfection absorber, it is characterised in that including metallic diaphragm, media coating and metal medium stack layer, the metal medium stack layer is set on media coating, and media coating is set on metallic diaphragm；The metal medium stack layer is formed by metal medium composite construction cyclic array.The present invention has the physical characteristic of high temperature resistant high fever, so as to effectively avoid the problems such as metal ohmic loss, fuel factor and thermal instability；Realize the wide band absorption of UV, visible light infrared band；Include that the fields such as infrared acquisition and opto-electronic conversion, infrared imaging, solar energy anti reflection paint and heat radiator are all with a wide range of applications in the photoelectric device of high temperature resistant high fever in the electromagnetic wave perfection absorption characteristic of the full spectral region of solar energy.
Description
Technical field
The present invention relates to photoelectric functional materials and device and solar photovoltaic device field, and in particular to a kind of solar energy
Full spectral region perfection light absorber.
Background technology
The free electron that surface plasmon resonance (Surface Plasmon) typically refers to metal structure surface is adding outside
Caused collective oscillation under electromagnetic wave irradiation forms local Electromagnetic enhancement effect in metal surface.
Meta Materials refer to the composite material with periodic structure of engineer and manufacture, and research was rapid in recent years
As the forward position crossing domain of the subjects such as physics, function technology and material science.
The concept of perfect light absorber be earliest 2008 (《Physical Review Letters》, volume 100, the
Page 207402) it proposes, it is a kind of electromagnetic wave plasmon resonance absorption based on Meta Materials.Typical Meta Materials perfection absorber
There is three-decker：Top layer is arranged by the metal microstructure unit with single or multiple plasmon resonance response modes
Periodic array in two dimensions, middle layer is one layer of medium or insulating materials tablet, and bottom is typically one layer of lighttight metallic plate.It is logical
The structure size and material parameter for rationally designing device are crossed, can generate and couple with the electromagnetic component of incident electromagnetic wave, to right
The electromagnetic wave realization being incident in the special frequency band of absorber absolutely absorbs.That is, being realized by electromagentic resonance phenomenon
Structure is in resonance wave strong point both no reflection (reflectivity is close to 0) or without transmission (transmissivity 0), to according to absorptivity
The definition of A=1-R-T (wherein A represents absorptivity, and R represents reflectivity, and T represents transmissivity) the rate A that can be absorbed is close
100% perfect absorption.Electromagnetic wave perfection absorber is to realize that efficient electromagnetic wave or solar spectral absorb and its in photoelectricity
An indispensable element in sensitive detection parts.From 2008, electromagnetic wave perfection absorber (《Advanced Materials》, the
Volume 24, the OP98 pages) research obtain the extensive concern of domestic and international researcher.The electricity of ultraviolet, visible waveband, near infrared band
Magnetic wave perfection absorber can be as the structural unit of photoelectric effect or photoelectric converter, the structural unit of heat emitters, or makees
To reduce the wave-absorbing coating material of electromagnetic wave spurious emissions.
The research system of existing perfection light absorber is mainly based upon the multilayer plasmon resonance of metal-dielectric-metal
Structural system or Meta Materials system realize from microwave frequency band to visible light wave range it is perfect absorb response (《Laser
Photonics Reviews》, volume 8, page 495).However in these perfect absorber systems, can only often it absorb single
The electromagnetic wave of resonant wavelength is the light absorption of narrowband.In addition, these electromagnetic wave perfection absorber systems are all based on noble metal material
Expect (such as gold, silver), the coupling of electromagnetic wave, these free electrons are realized by the free electron oscillation mode of these metal materials
Oscillation necessarily leads to very strong ohmic loss and fuel factor, is unfavorable for the structural stability of metal micro-nano material, also limits to
Application prospect of such absorber under the irradiation of high-strength magnetic wave.Chinese invention patent discloses a kind of titanium-based solar energy selection
Property absorber coatings, but the absorber coatings have high-selenium corn efficiency wave-length coverage it is narrow and complicated, need tightly configured absorber,
The structural units such as anti-reflection layer and absorbed layer.
In conclusion how to break through the limitation of existing research system and how to realize broadband perfection light absorption and be resistant to high
The perfect absorber of the full spectral region of solar energy of mild high-heat environment is still contemporary scientific in a problem of technical field.
Therefore, it is existing for solving to design and Implement the structural system with the full spectral region perfection light absorption response of solar energy
There is perfect absorb that research system and inventive structure can not be provided simultaneously with will with the problem of high temperature resistance and high strength radiotechnology requirement
With very important realistic meaning and application value.
Invention content
The problem of being proposed for background technology now provides a kind of full spectral region perfection light absorber of solar energy to reach solution
Certainly effect is now further elaborated the present invention.
For the deficiency of above-mentioned perfect light absorber, the present invention is to provide for one kind and being operated in ultraviolet-visible-infrared waves
The full spectral region perfection light absorber of solar energy of section, it is intended to introduce the piece of refractory metal material such as titanium, vanadium, tungsten and nickel, utilize difference
The broadband Resonance Absorption Properties of the metallic particles of size itself and its electromagentic resonance characteristic of grain periods array, letter
The structure for changing absorptive unit increases the bandwidth of absorption spectrum, realizes the perfect light absorption of the full spectral region of solar energy.Meanwhile it is logical
The relevant characteristic of geometric dimension size of the electromagentic resonance pattern and particle that are provided using refractory metal particle is provided, realizes and absorbs
Spectral tuning of the bandwidth of spectrum in solar energy spectral limit.
A kind of Visible-to-Near InfaRed region broadband perfection absorber, it is characterised in that including metallic diaphragm, media coating with
And metal-dielectric stack layer, the metal-dielectric stack layer be set to media coating on, media coating be set to metallic diaphragm it
On.
The metal-dielectric stack layer is formed by metal-dielectric composite construction cyclic array；The metal-dielectric is multiple
Conjunction structure is six layer structure, is from bottom to top followed successively by lower metal particle cylinder, layer dielectric particle cylinder, middle layer metal particle
Cylinder, middle level media particle cylinder and upper layer metallic particles cylinder, top dielectric particle cylinder.
The thickness of the metallic diaphragm is not less than 200 nanometers.
The material of the metallic diaphragm is titanium, vanadium, tungsten or nickel.
The thickness range of the media coating is 20 nanometers to 60 nanometers.
The material of the media coating is silica, magnesium fluoride or aluminium oxide.
Advantageous effect：Compared with prior art, the full spectral region perfection light absorber of solar energy of the invention has as follows
Advantage：
1, the resonating member structure of entire absorber is made of refractory material, has the physical characteristic of high temperature resistant high fever, from
And it is possible to prevente effectively from previous common based on the systems group such as noble metal granule array or multi-element metal resonance array composite construction
At perfect light absorber can not overcome the loss of inherent metal ohmic, the problems such as fuel factor and thermal instability；
2, by using piece of refractory metal material, the strong electromagnetic resonance mode having using refractory metal grain structure and wide wave
The Resonance Absorption Properties of section, realize the wide band absorption of ultraviolet-visible-infrared band；
3, the metal-dielectric grain structure layer based on different sizes generates the electromagnetism in the full spectral region of solar energy
Wave perfection absorption characteristic includes infrared acquisition and opto-electronic conversion, infrared imaging, too in the photoelectric device of high temperature resistant high fever
Positive energy anti reflection paint and heat radiator etc. fields are all with a wide range of applications.
Description of the drawings
Fig. 1：The texture edge schematic diagram of the full spectral region perfection light absorber of solar energy of the present invention；
Fig. 2：The structure schematic top plan view of the full spectral region perfection light absorber of solar energy of the present invention；
Fig. 3：Light absorption figure in the full spectral region perfection light absorber of solar energy of embodiment one；
Fig. 4：The full spectral region perfection light absorber of solar energy of embodiment two is under the AM1.5 irradiations of standard light source of solar energy
Light absorption figure；
Fig. 5：The full spectral region perfection light absorber of solar energy of embodiment three is under the AM1.5 irradiations of standard light source of solar energy
Light absorption and loss comparison light absorption figure；
Fig. 6：The light absorption figure of the full spectral region perfection light absorber of solar energy of example IV；
Fig. 7：The light absorption figure of the full spectral region perfection light absorber of solar energy of embodiment five；
In figure：1- metallic diaphragms；2- media coatings；3- lower metal particle cylinders；4- layer dielectric particle cylinders；In 5-
Layer metallic particles cylinder；The middle levels 6- media particle cylinder；The upper layers 7- metallic particles cylinder；8- top dielectric particle cylinders；9- gold
Category-dielectric stack；10- metal-dielectric composite constructions.
Specific implementation mode
1~6 couple of present invention elaborates below in conjunction with the accompanying drawings, and still, the following drawings is only that the idealization of the present invention is real
The schematic diagram of example is applied, wherein in order to clearly show the structure of device involved by the present invention, to wherein selected metal-dielectric circular cone
The thickness of shape cylindrical particles structure layer region has carried out appropriate amplification, but it should not be considered as strictly reflecting as schematic diagram
The proportionate relationship of geometric dimension.In addition, embodiment shown in the present invention also should not be considered limited to region shown in figure
Specific shape.In general, the following drawings is schematical, be should not be considered as limiting the scope of the invention.
A kind of Visible-to-Near InfaRed region broadband perfection absorber, including metallic diaphragm 1, media coating 2 and metal-
Dielectric stack 9, the metal-dielectric stack layer 9 are set on media coating 2, and media coating 2 is set on metallic diaphragm 1.
The metallic diaphragm 1 is located at the lowermost end of absorber, and the top and bottom of metallic diaphragm 1 can be even surface, at other
In embodiment, top and bottom also can at least one side be irregular face.
The material of metallic diaphragm 1 can be titanium, vanadium, tungsten or nickel.
The thickness of metallic diaphragm 1 is at least not less than 200 nanometers.
In other embodiments, 1 top and bottom of metallic diaphragm can also have one side to be irregular face or be all irregular face.
Deposition has media coating 2 on metallic diaphragm 1, and the material of media coating 2 can be silica, magnesium fluoride or oxidation
Aluminium.
The thickness range of media coating 2 is 20 nanometers to 60 nanometers.
Deposition has metal-dielectric stack layer 9, the metal-dielectric stack layer 9 compound by metal-dielectric on media coating 2
10 cyclic array of structure forms, between the metal-dielectric composite construction 10 of the arbitrary neighborhood of the metal-dielectric stack layer 9
Horizontal distance fall into 400 nanometers to 700 nanometers.
The metal-dielectric composite construction 10 be six layer structure, be from bottom to top followed successively by lower metal particle cylinder 3, under
Layer media particle cylinder 4, middle layer metal particle cylinder 5, middle level media particle cylinder 6 and upper layer metallic particles cylinder 7, upper layer are situated between
Matter particle cylinder 8.
In six layers of cylindrical structure that metal-dielectric composite construction 10 is, lower metal particle cylinder 3 and layer dielectric particle
The diameter of cylinder 4 is consistent, and middle layer metal particle cylinder 5 is consistent with the diameter of middle level media particle cylinder 6, upper layer metallic particles column
Body 7 is consistent with the diameter of top dielectric particle cylinder 8, also, the diameter of lower metal particle cylinder 3 is more than middle layer metal particle
The diameter of cylinder 5, the diameter of middle layer metal particle cylinder 5 are more than the diameter of upper layer metallic particles cylinder 7.
The diameter range of the maximum diameter of metal-dielectric composite construction 10, that is, lower metal particle cylinder 3 be 100 nanometers extremely
Between 500 nanometers.
Three-layer metal particle cylinder, that is, lower metal particle cylinder 3, middle layer metal in metal-dielectric composite construction 10
The material of grain cylinder 5 and upper layer metallic particles cylinder 7 is titanium, vanadium, tungsten or nickel.
Three layers of media particle cylinder, that is, layer dielectric particle cylinder 4, middle level medium in metal-dielectric composite construction 10
Grain cylinder 6, top dielectric particle cylinder 8 material be silica, magnesium fluoride or aluminium oxide.
Also, any one layer of thickness range is 30 nanometers to 50 in the six layer structure of metal-dielectric composite construction 10
Between nanometer.
In certain embodiments, metal-dielectric composite construction 10 can be more than six layers of structure, and every layer of structure can be
Round platform or other rules or irregular structure.
In certain embodiments, the thickness value of 10 arbitrary double-layer structure of metal-dielectric composite construction can be identical or differs,
But any one layer of thickness range is 30 nanometers to 50 nanometers.
Technical scheme of the present invention is described in detail with reference to several preferred embodiments and relevant drawings：
In one embodiment of the present of invention one：
The material of metallic diaphragm 1 is titanium and thickness is 200 nanometers, and the material of media coating 2 is silica and thickness is
30 nanometers.
In metal-dielectric composite construction 10, lower metal particle cylinder 3 is consistent with the diameter of layer dielectric particle cylinder 4
And be 200 nanometers, middle layer metal particle cylinder 5 is consistent with the diameter of middle level media particle cylinder 6 and is 300 nanometers, upper layer gold
Metal particles cylinder 7 is consistent with the diameter of top dielectric particle cylinder 8 and is 400 nanometers.
The thickness of any one layer of cylindrical structure is all 30 nanometers in metal-dielectric composite construction 10.
The lattice constant for the square cyclic array that metal-dielectric composite construction 10 forms is 500 nanometers, i.e., adjacent gold
The horizontal distance of category-medium composite construction 10 is 500 nanometers.
Refer to the attached drawing 3, wherein spectrum solid line are the absorptivity spectrum of structure, and dash line is reflectivity spectral line, and dotted line is
Penetrate rate spectral line.It can be found that all presenting high light absorption, wherein absorptivity in entire spectral region from the spectrogram of test
Efficiency is more than that 0.9 wave-length coverage has reached 1438 nanometers, and maximum absorbance has reached 99.9%.
In an alternative embodiment of the invention two：
Irradiation light is changed to the irradiation light of standard light source of solar energy AM1.5 by the present embodiment on the basis of embodiment one.It is attached
Fig. 4 is light absorption figure of the full spectral region perfection light absorber of solar energy of the present invention under the AM1.5 irradiations of standard light source of solar energy.
Refer to the attached drawing 4, from the spectrogram of test it can be found that under the AM1.5 irradiations of standard light source of solar energy, absorber
The absorption spectrum essentially coincided with standard sources optic spectrum line is produced to respond.In entire solar energy spectral limit from 280 nanometers
To 4000 nanometers self-visible-infrared band in, the absorption spectrum spectral line of absorber substantially repeats standard light source of solar energy
Spectral line, only have very faint strength difference in visible waveband.These results all show that absorber can be in the full light of solar energy
Perfect light absorption is generated in spectral limit.
In an alternative embodiment of the invention three：
The present embodiment measures the full spectral region perfection light absorber of the present embodiment solar energy and exists on the basis of embodiment two
The light absorption figure of light absorption and loss comparison under the AM1.5 irradiations of standard light source of solar energy.
Refer to the attached drawing 5, solid line are the solar energy that absorber of the present invention is absorbed under the AM1.5 irradiations of standard light source of solar energy
The spectral line of spectrum.Dotted line is the spectrum that absorber is not absorbed i.e. loss under the irradiation of this light source.
It can be found that absorber only has very small part of solar spectral not have in visible waveband from the spectrogram of test
Have and is absorbed.In entire solar energy spectral limit, absorber is provided relative to the exposure intensity of standard light source of solar energy AM1.5
Up to 0.972 absorption efficiency, that is, the perfection realized in solar energy full spectral region absorb.
In an alternative embodiment of the invention four：
The present embodiment measures the light absorption figure of the full spectral region perfection light absorber of solar energy.
The material of metallic diaphragm 1 is tungsten and thickness is 250 nanometers, and the material of media coating 2 is silica and thickness is
40 nanometers.
In metal-dielectric composite construction 10, lower metal particle cylinder 3 is consistent with the diameter of layer dielectric particle cylinder 4
And be 300 nanometers, middle layer metal particle cylinder 5 is consistent with the diameter of middle level media particle cylinder 6 and is 400 nanometers, upper layer gold
Metal particles cylinder 7 is consistent with the diameter of top dielectric particle cylinder 8 and is 500 nanometers.
The thickness of any one layer of cylindrical structure is all 40 nanometers in metal-dielectric composite construction 10.
The lattice constant for the square cyclic array that metal-dielectric composite construction 10 forms is 600 nanometers, i.e., adjacent gold
The horizontal distance of category-medium composite construction 10 is 600 nanometers.
Refer to the attached drawing 6, it can be found that in the spectral region of entire visible-infrared band all from the spectrogram of test
Present high light absorption, absorptivity has been above 0.82, and the spectral region that wherein absorptivity efficiency is more than 0.9 is more than 1700 to receive
Rice, maximum absorbance have reached 0.998.
In an alternative embodiment of the invention five：
The present embodiment measures the light absorption figure of the full spectral region perfection light absorber of solar energy.
The material of metallic diaphragm 1 is only changed to vanadium by the present embodiment on the basis of embodiment one.
What refer to the attached drawing 7, wherein solid line represented be in absorber metal material as vanadium absorption line, dash line represent
The absorption line that metal material in absorber is nickel, what dotted line represented is the metal material in absorber as tungsten absorption spectra
Line.
It can be found that the absorber based on vanadium metal material absorbs in entire spectral region from the spectrogram of test
Rate has also been above 0.82, and wherein maximum absorbance has reached 0.999, shows that the absorber based on piece of refractory metal material vanadium can
To generate the perfect light absorption in solar energy spectral limit.
In other embodiments of the invention six, embodiment seven, all on the basis of embodiment five, by the material of metallic diaphragm 1
Matter is changed to nickel, tungsten respectively, can equally show that the absorber based on piece of refractory metal material nickel or tungsten can from the spectrogram of test
To generate the perfect light absorption in solar energy spectral limit.
The embodiment of the present invention is only elaborated technical scheme of the present invention, and however, it is not limited to this, every to this hair
Bright technical solution is modified or replaced equivalently, and without departing from the spirit of the technical scheme of the invention and range, should all be covered
In protection scope of the present invention.
Claims (10)
1. a kind of Visible-to-Near InfaRed region broadband perfection absorber, it is characterised in that including metallic diaphragm, media coating and
Metal-dielectric stack layer, the metal-dielectric stack layer are set on media coating, and media coating is set on metallic diaphragm.
2. broadband perfection absorber in Visible-to-Near InfaRed region according to claim 1, it is characterised in that：The metal-
Dielectric stack is formed by metal-dielectric composite construction cyclic array；The metal-dielectric composite construction is six layer structure,
From bottom to top it is followed successively by lower metal particle cylinder, layer dielectric particle cylinder, middle layer metal particle cylinder, middle level media particle
Cylinder and upper layer metallic particles cylinder, top dielectric particle cylinder.
3. broadband perfection absorber in Visible-to-Near InfaRed region according to claim 2, it is characterised in that：The metal-
Six layers of cylindrical structure of medium composite construction are all cylindrical structure.
4. broadband perfection absorber in Visible-to-Near InfaRed region according to claim 3, it is characterised in that：The metal-
In six layers of cylindrical structure of medium composite construction, lower metal particle cylinder is consistent with the diameter of layer dielectric particle cylinder, in
Layer metallic particles cylinder is consistent with the diameter of middle level media particle cylinder, upper layer metallic particles cylinder and top dielectric particle cylinder
Diameter it is consistent, also, the diameter of lower metal particle cylinder be more than middle layer metal particle cylinder diameter, middle layer metal particle
The diameter of cylinder is more than the diameter of upper layer metallic particles cylinder.
5. broadband perfection absorber in Visible-to-Near InfaRed region according to claim 1, it is characterised in that：The metal
The thickness of film layer is not less than 200 nanometers.
6. broadband perfection absorber in Visible-to-Near InfaRed region according to claim 1, it is characterised in that：The metal
The material of film layer is titanium, vanadium, tungsten or nickel.
7. broadband perfection absorber in Visible-to-Near InfaRed region according to claim 1, it is characterised in that：The medium
The thickness range of film layer is 20 nanometers to 60 nanometers.
8. broadband perfection absorber in Visible-to-Near InfaRed region according to claim 1, it is characterised in that：The medium
The material of film layer is silica, magnesium fluoride or aluminium oxide.
9. broadband perfection absorber in Visible-to-Near InfaRed region according to claim 1, it is characterised in that：The metal-
Horizontal distance in dielectric stack 9 between two metal-dielectric composite constructions 10 of arbitrary neighborhood is more than or equal to 400 nanometers small
In equal to 700 nanometers.
10. broadband perfection absorber in Visible-to-Near InfaRed region according to claim 4, it is characterised in that：The gold
Any one layer of thickness range in category-medium composite construction 10 is 30 nanometers to 50 nanometers.
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| CN109324361A (en) * | 2018-12-14 | 2019-02-12 | 深圳大学 | A kind of closely perfect absorber of ultra wide wave band and its manufacturing method |
| CN110196464A (en) * | 2019-07-01 | 2019-09-03 | 江南大学 | A kind of a kind of method and composite microstructure for realizing that ultra-wideband-light absorbs |
| CN110634966A (en) * | 2019-10-14 | 2019-12-31 | 江西师范大学 | Ultrathin sunlight black silicon wave absorber and preparation method thereof |
| CN110873909A (en) * | 2019-12-02 | 2020-03-10 | 华东交通大学 | Ultra-wideband polarization insensitive absorber of full ultraviolet-mid-infrared band |
| CN110927840A (en) * | 2019-11-26 | 2020-03-27 | 宁波工程学院 | Three-grating cascade structure and ultra-wideband absorber based on three-grating cascade structure |
| CN112856837A (en) * | 2021-01-11 | 2021-05-28 | 中南大学 | Spectrum selective light absorption structure for solar water gasification |
| CN112952400A (en) * | 2021-02-01 | 2021-06-11 | 西安电子科技大学 | Broadband wave-absorbing structure with high-transmittance wave-transmitting window |
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| CN112856837A (en) * | 2021-01-11 | 2021-05-28 | 中南大学 | Spectrum selective light absorption structure for solar water gasification |
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| CN112952400A (en) * | 2021-02-01 | 2021-06-11 | 西安电子科技大学 | Broadband wave-absorbing structure with high-transmittance wave-transmitting window |
| CN114460673A (en) * | 2022-01-21 | 2022-05-10 | 中南大学 | High-temperature solar spectrum selective absorber based on plasmon resonance and preparation method thereof |
| CN114460673B (en) * | 2022-01-21 | 2023-05-26 | 中南大学 | High-temperature solar spectrum selective absorber based on plasmon resonance and preparation method thereof |
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