CN101418218A - Solar cell luminescent conversion layer and inorganic fluorescent powder - Google Patents
Solar cell luminescent conversion layer and inorganic fluorescent powder Download PDFInfo
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- CN101418218A CN101418218A CNA2008101803670A CN200810180367A CN101418218A CN 101418218 A CN101418218 A CN 101418218A CN A2008101803670 A CNA2008101803670 A CN A2008101803670A CN 200810180367 A CN200810180367 A CN 200810180367A CN 101418218 A CN101418218 A CN 101418218A
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Abstract
The invention relates to the technical field of energy technology, in particular to a material structure for manufacturing a silicon solar cell. The structure of the silicon solar cell is formed by collected an organosilicon polymer and inorganic oxide fluorescent powder. The compositions of the solar cell come from polysilicon, monocrystal silicon and amorphous silicon, which aim at better improving effective parameters of the solar cell. In the inorganic fluorescent powder containing an oxidation composition, the material structure adopts orthosilicate, aluminate, phosphate-vanadate and oxysulfide. When d50 is less than or equal to 0.8 micron, the weight ratio of synthetic fluorescent powder is between 0.05 and 10 percent; and the organosilicon polymer on the surface has the same thickness layer which is formed through 0.3 to 5 mm thermoplastic loading or thermosetting loading Three modes are comprehensively adopted to promote all electrical parameters of the solar cell by 10 percent and increase efficiency by 20 percent than the prior efficiency.
Description
Technical field
The present invention is relevant energy alternation power technology, specifically depends on material structure and be used in to produce in the silicon solar cell.Silicon solar cell is widely used in substitute energy, and silicon is that the kind of solar cell generally adopts:
--based on the silicon single crystal thin plate of Si;
--based on the polycrystalline sheet of Si; And
--with the non-crystalline silicon is the film of matrix, is referred to as α-Si.
The concrete research direction of the present invention is the silicon solar cell of relevant silicon structure.Be similar to the solar battery structure that this kind stems from the silicon composition, comprise: two surfaces respectively have an electrode, and one of them is whole (entity) for (1); (2) second is the palisade kenel; (3) outside surface at silicon thin plate forms the p-n junction layer; And the product of the gaseous state of (4) boracic diffusion produces bright brightness under silicon thin plate.
Prior art
By the significant parameter usefulness of present stage solar cell, come from the output ratio of solar cell power in the sunlight overall power, see through the specialty measuring and calculating, when lighting angle and sea line are 60 when spending, the power of solar light irradiation on the top layer, soil is 1000 watts/m
2Because the ratio of electric power is set up, and has determined effective solar cell.In theoretical gem-pure being documented in " silicon solar cell " like this, the efficient limit of silicon single crystal can not exceed 24%, for example document Qiao Pula A. solar film battery " world " Moscow P360 page or leaf (Russia) in 1985 (Ч о п р а А. Т о н к о п л e н о ч н ы н e с о л н e ч н ы e з л e м e н т ы. И з д-в о " М и р ", М о с к в a, 1985 г о д, 360 с т р. (н а р у с с к o м)) put down in writing.In the composition of solar cell, lack necessary heat energy cooling, caused mainly losing of efficient, especially in the energy field of silicon single crystal.
First relevant for for solar cell in conjunction with thermodynamic (al) theory, any one energy derive, the Kapho of institute's basis reduction circulation (law title), corresponding efficient reduces η=(T
1-T
2)/T
1, η-be T wherein
1The validity cycle under the temperature cycle, T
2-be the temperature under the transmission procedure energy, if
Effective cycle values minimum, so the solar cell of all large size profiles has solid base (base) and can accept mandatory cooling.
Second reason of being spoken of is directly relevant with monocrystal silicon structure, for passing through transfer transport, the energy that is added when bottom conductive district and vertical valency regional work, can convert equal heat energy to, to silicon crystal lattice heating (physical phenomenon that is produced such as sound, ground unrest etc.), this numerical range is at 0.8～1 kilovolt usually according to the heat fluctuation mechanics principle.
Also have some other reason to make decrease in efficiency, for example thermosteresis.Part sunlight quantum has energy h ν=3 ev, but for the wide forbidden zone E of silicon single crystal
g=1.1 ev, that is to say after sunlight hits the silicon single crystal plate has energy heat wave power in lattice of 1.9 ev to exist, and to the heating of silicon single crystal plate, causes thermosteresis.In addition, monocrystaline silicon solar cell also exists the losing of an important virtual value-sunlight greatest irradiation spectrum (λ=470nm) and silicon single crystal sensitivity spectrum maximum value (spectral displacement between the λ=940nm).Inharmonious existing description of KP2007011205 patent application case of being filed an application to Korean Patent office on December 11st, 2007 of relevant this spectrum the contriver.Quote the data in this patent case, change, get rid of its inharmonic defective for the luminous radiation in yellow wavelengths scope zone in the silicon solar cell spectrum composition.
On luminescence converter, adopt microlite garnet fluorescent powder composition to obtain practicable result, although this idea is very attractive, data deficiencies in this theory of carrying of realization.In addition, lack for mentioned monocrystaline silicon solar cell data are also very poor.
The open U.S. the 2007/0295383rd A1 patent case in 27 days December in 2007 that had of Intematix company for example, for the usefulness that improves solar cell and adopted theory in the aforementioned Korea S KP2007011205 patent application case, adopt silicate series fluorescent material to get for promoting the photoelectric transformation efficiency suggestion for expensive garnet, the contriver of this Korea S KP2007011205 patent application case (Soshchin N.P.) proposes in this case patent specification, the efficient of solar cell can promote 1% (absolute numerical value), though do not quote in concrete experimental data.
Through pointed in conversion layer in this U.S. Patent Publication the 2007/0295383rd A1 case, must adopt the fluorescent material of nano-sized particles, the intensive radiant light of when first step radiation, getting rid of, absorb light is no more than 5% in the mentioned transmodulator.In fact, still exist a series of deficiency in this U.S. Patent Publication the 2007/0295383rd A1 case:
--lack the high efficiency photoelectric coefficient of lifting of expection;
--the mentioned technical characterictic of patent is difficult to realize.
Summary of the invention
The present invention realizes increasing the effectiveness coefficient of solar cell, and main purpose system provides preparation monocrystaline silicon solar cell and polysilicon solar cell.This silicon solar cell has following advantage:
--make the structure of solar cell with best-of-breed technology;
--promote the conduction parameter of solar cell; And
--the optimum operation condition that silicon solar cell is luminous.
The accompanying drawing summary
For the enforcement of mentioned solution, the present invention further discloses concrete technology contents, at first see also graphic, wherein:
Fig. 1 is the composition and the structure iron of relevant silicon solar cell of the present invention.
Fig. 2 a and Fig. 2 b are the reflected light spectrogram of monocrystaline silicon solar cell of the present invention.
Fig. 3 is λ for the present invention in excitation wavelength
ExciteDuring=464 nanometers, the spectrogram of gold-tinted fluorescent material.
Fig. 4 is λ for the present invention in excitation wavelength
ExciteDuring=464 nanometers, the spectral radiance map of aluminate fluorescent powder.
Wherein, the primary clustering nomenclature is as follows:
End face 3 coatings 4
Luminescent conversion layer 5 polymkeric substance 6
Inorganic fluorescent powder 7
[embodiment]
Research direction for purpose according to the invention and establishment, for the performance perameter that promotes silicon solar cell, mentioned organosilicon polymer and inorganic fluorescent powder particulate distribution range is characterized in that, the molecule that organosilicon polymer contains is M=10000～25000 carbons.The miniature fluorescent powder grain of introducing be aluminate, silicate, phosphoric acid salt, vanadate, oxysulfide with and the mixture weight ratio be 0.01～10%, be 0.01 gram/cm at the spectrum conversion layer of silicon solar energy battery surface
2
Among the silicon solar cell constituent structure figure as shown in Figure 1: the thickness of a silicon chip 1 is 180
-360 microns, physical dimension is 30*40mm, and it has the electrode system of bottom surface 2 and end face 3.In the thin coatings 4 of the surface coverage of end face 3 silicon, its material is silicon nitride (Si
3N
4), tectum is positioned on the thin P-N layer.Luminescent conversion layer 5 ties up on the coatings 4, and this luminescent conversion layer 5 is made up of the organosilicon polymer 6 of filling full inorganic fluorescent powder 7.In the element silicon composition that does not have illumination, do not produce electric power,,, have following special efficacy parameter as form with fluorescent lamp in the illumination of sunlight and at the synthetic hair luminous point:
V
OC-non-load voltage, V
I
SC-short circuit (closure) current density, mA/cm
2
The FF-effectiveness coefficient
η-battery absolute efficiency
η＝V
OC·FF·I
SC。
In table 1, quote special sun power electrode size 30*40mm, come from dissimilar silicon solar cells.
Table 1
Can learn that fluorescent material is based on organosilicon polymer at the luminescence converter of silicon solar energy battery surface in the process of invention, it has perveance and the luminous coefficient thereof that changes all silicon solar cells.Change and come from different reasons, its major cause can be divided into:
--the fluorescent material as the organosilicon polymer Chemical Composition forms (temperature, viscosity, set time) on its top layer;
--inorganic oxide matter fluorescent powder Chemical Composition spectrogram, the mutual relationship of spectrum that it is special and fluorescent powder grain and polymer quality; And
--the type of the silicon that adopts.
The contriver has found that, for adopting with polysilicon (Poly-Si) solar cell when being main V
OCCoefficient has increased by 0.22～0.89%, and promotes closing current density 0.22～0.89%, and when the increase overall current was worth 1.1～4.1%, the average cell absolute efficiency had changed sample parameter V 12%
OC=0.5728V, I
SC=30.4077mA/cm
2, the prior effectiveness coefficient FF=0.6884 that changed, the mean value before changing is at FF=0.6705, and maximum increases to Δ FF=15.24%.
The contriver further finds, can improve battery absolute efficiency η=1.46～20.38% by organosilicon polymer at the coating and the fluorescent material component of monocrystalline silicon surface, and mean effective value is promoted to Δ η=+ 6.8%.The silicon single crystal that mainly is utilization traditional parameters value in solar cell is main, and for example shown in the Korea S KP2007011205 patent application case, its conduction parameter increases to V
OC=0.5809V, FF=0.7532, J
SC=33.8624 milliamperes/cm
2And battery absolute efficiency η=14.5606.
Use for non-crystalline silicon in solar cell is considerably less, because experiment quantity and employing thereof are limited, points out to use parameter value when of the present invention to exceed original 12
-28%.
Sum up all data, that can affirm says, the silicon composition of mentioned solar cell of the present invention has higher special usefulness in present stage, has equally also increased whole actual parameter.
Solar cell of the present invention is formed a unexpected experimental result in this test, the organosilicon polymer that proposes in order to make, it is characterized in that it contains the particle of fluorescent material, for example orthosilicate fluorescent material composition+divalent activator Eu of exciting of UV spectrum
+ 2Stoichiometric equation be shown below:
(Me
2+O)
a(Si(O
1-pC
xD
yE
z)
2)
b
Wherein,
Me
2+=Ba
2+And/or Sr
2+And/or Ca
2+And/or Mg
2+And/or Eu
2+,
C=Hal=F
-And/or Cl
-And/or Br
-And/or I
-,
D=Chal=S
2-And/or Se
2-,
E＝N
3-，
p＝x/2+y+3z/2，
The stoichiometry of this fluorescent material is such as shown in the following numerical value: 0.0001≤X≤0.01,0.0001＜y≤0.01,0.0001＜z≤0.01, a=1,2,3,8; B=1,2,4, excite down at solar radiation, the radiation scope of this fluorescent material is by λ
1=500nm to λ
2=660nm.
The contriver will be in hereinafter further setting forth this notion.At first, compare with excitation wavelength for the material of fluorescent material, external radiation absorbs down and has longer radiation wavelength, and this kind fluorescent material is referred to as " stokes " material.Similarly, this fluorescent material major ingredient is divided into:
--sulphide fluorescent material;
--halogenide fluorescent powder;
--Nitride phosphor; And
--oxide fluorescent powder.
The relevant material that belongs to oxide fluorescent powder, its major ingredient is oxygen and phosphoric acid in the composition, silicate, aluminate, negatively charged ion and positively charged ion and active element.
In test the data of it " conversion composition " in the spectrum that the must be introduced in conversion, concrete orthosilicate fluorescent material composition be (Ba, Sr, Ca, Mg)
8Si
4O
15.4F
0.2Cl
0.1N
0.3: Eu
2+, this synthetizing phosphor powder adopts well-known method, and the contriver Soshchin N.P. of case for example of the present invention is in shown on October 2nd, 2008 open the 2008/0236667th A1 patent case, and+divalent active ions Eu
+ 2, the sensitized ions VII F of family wherein
-, Cl
-And the N of V family
3-
The fluorescent material sample that adopts can be had neutrality line particle diameter d by ultraviolet excitation
50≤ 0.5 micron and d
90≤ 3.6 microns, and green emitting radiation wavelength λ=521nm, the radiation wavelength of fluorescent material extends to λ=630nm, and the organosilicon polymer composition of configuration comprises mentioned silicate fluorescent powder, system is introduced in the ultrasound agitator routinely, and the weight ratio of fluorescent material is 0.001～10%.The contriver is careful, and for the fluorescent material of its introducing, particle size can increase to d
50=5 microns.
Find that as the contriver best fluorescent material weight ratio is m=0.6～1.3% when adopting polysilicon.Use the fluorescent material of small particle diameters, similarly, numerical value should reach in the polysilicon sample increases Δ V
OC=1.457% o'clock m=0.23%, when m=1%, Δ V=1.281%, current density increased by 0.96% to 3.5% o'clock, the weight ratio that reduces fluorescent material is by m=2.6% to m=0.98%, obtain best increasing value FF, Δ FF=1% similarly, the weight ratio that has obtained fluorescent material is m=1.2%.
The maximum effectively rate of increase of monocrystaline silicon solar cell is Δ FF〉10%, the weight in average of fluorescent material is than being m=0.8～1.6%.This content typical case quotes shown in Fig. 2 a and the 2b, relatively the reflector of polysilicon chip and the working method of forming luminescent conversion layer subsequently.Then the compare polycrystalline sheet excites the littler reflection of acquisition in the scope at the shortwave wavelength, such decline, and the energy that may be the fluorescent material absorption is at sub-band wavelength 300～500nm, and the reflectance value of constituent is 50～100%.
Find the reflection coefficient of similar reduction effect in original silicon single crystal composition, its absolute value is lower.Need hang down the polymkeric substance of fluorescent material weight ratio for the non-crystal silicon solar energy composition, effectively rate of increase surpasses 20% in this solar cell.This definite numerical value is confirmed in test, the silicon solar cell component of being set up, and contriver's observation is not only on above-mentioned silicate fluorescent powder, similarly is applicable to the fluorescent material that adopts two set types.
It is main that the contriver quotes mentioned fluorescent material equally, for example rare earth element aluminium and yttrium, and activator is a cerium, the stoichiometric equation of its composition is shown below:
Ln
3Al
5(O
1-pC
xD
yE
z)
12
Wherein
Ln=Y and/or Gd and/or La and/or Ce and/or Pr and/or Yb and/or Nd and/or Lu,
C=Hal=F
-1And/or Cl
-1And/or Br
-1And/or I
-1,
D=Chal=S
2-And/or Se
2-,
E＝N
3-，
p＝x/2+y+3z/2，
This fluorescent material stoichiometry is such as shown in the following numerical value: 0.0001≤x≤0.01,0.0001＜y≤0.01,0.0001＜z≤0.01.
Similarly the fluorescent material radiation spectrum discloses in the Fig. 4 shown in this case specification sheets, and its following numerical value is that mentioned fluorescent material radiation is by λ
1=490nm to λ
2During=720nm, exciting light has wavelength X=464nm, is suitable for maximum solar spectrum.
Silicon single crystal reflection spectrum composition is made up of the organosilicon polymer of introducing aluminate fluorescent powder, as shown in Figure 2, reduces 1.6-1.9 doubly for the wavelength reflection coefficient compound coating in short wavelength regions.
Aluminate fluorescent powder is in the luminous influence few (efficient has increased by 10%) in yellow spectrum zone in test, but under the standard of the employing mono-crystalline silicon solar composition, shown in aforementioned KP2007011205 patent application case, this yellow spectrum area efficiency can reach 18
-20%.This group can promote the silicate fluorescent powder composition of parameter, can the aforementioned existing defective of U.S. Patent Publication the 2007/0295383rd A1 case of technical solution.
Also have a technology to solve organosilicon polymer and the oxygen containing fluorescent material of system relevant for silicon solar cell, for the fluorescent powder grain of quoting in organosilicon polymer, for example based on the yttrium of rare earth element, the stoichiometric equation of activator ytterbium and neodymium is:
Ln(P
1-nV
n)O
4
Wherein Ln=Y and/or Gd and/or La and/or Ce and/or Pr and/or Yb and/or Nd and/or Lu, this fluorescent material stoichiometric ratio n changes into 0.0001＜n≤0.6, excites down at sunlight, and the radiation wavelength of this fluorescent material is by λ
1=800nm to λ
2=1060nm.
For similar phosphoric acid salt-vanadate fluorescent material, special spectral class is similar to the description of contriver in U.S.'s patent disclosure the 2008/0236667th A1 case on October 2nd, 2008, observes out its reflection parameters at λ
1=700nm to λ
2The zone of=1000nm, fluorescent powder grain have the intensive radiation and absorb, near the infrared spectrum zone.The radiation of fluorescent material has the luminous energy that increases by 700～1000nm in the dissimilar silicon solar cells.The radiation areas of the maximum spectral absorption outside of silicon solar cell are at 1000～1200nm.Phosphoric acid salt and the weight ratio of vanadate fluorescent material in organosilicon polymer are 0.4～1.8%, and the medium particle diameter of fluorescent powder grain is d
500.8 micron of ≈.
The quantity of radiant energy once more of mentioned fluorescent material is bigger in the silicon solar cell thin plate, can adopt the silicon single crystal thin-slab construction of thicker thickness (to 360 microns) in such cases.
Solar cell of the present invention comprises mainly that by the structure that oxygen containing fluorescent material and organosilicon polymer are formed that has that covers on the monocrystalline silicon battery wherein introduced oxygen containing fluorescent powder grain, the stoichiometric equation that it had is shown below:
Ln
2O
2S
1-qC
2q
Wherein Ln=Y and/or Gd and/or La and/or Ce and/or Pr and/or Yb and/or Nd and/or Lu, C=Hal=F
1-And/or Cl
1-And/or Br
1-And/or I
1-, this fluorescent material stoichiometric ratio is 0.0001＜q＜0.5, and this fluorescent material can be excited by the sunlight near infrared light region.
According to contriver's observation, in this fluorescent material, contain oxygen fluorescent material composition, active ions Yb for introducing
3+, Nd
3+And Ce
3+Existence reduced the surface reflection of silicon single crystal, polysilicon, be positioned at the reflection of wavelength region may λ=720nm to λ=1100nm, in ensuing Fig. 2 a and Fig. 2 b detailed analysis the spectral reflectance of silicon single crystal thin plate.Reflection coefficient has reduced by 10～30% for short wavelength regions.Shown in Fig. 2 b, light emitting ionic Yb in the zone of λ=840-860nm
+ 3Significantly have influence, wherein can find out this ionic radiation, the silicon chip thin plate has intensive and absorbs, and this radiation that is positioned at sulfur oxide fluorescent material absorbs the electrode parameter that can make the silicon composition equally increases by 4～16% relatively.
These not only are suitable for mentioned special fluorescent material relevant for the experimental data that increases the silicon solar cell efficiency of conversion, also be suitable for simultaneously its mixture, be suitable for fluorescent material based on silicate, sulfur oxide especially, its blending ratio is 3:1 to 2:1.Similarly the weight ratio of phosphor mixture in organosilicon polymer is 0.7～0.8%, and reaching the battery absolute efficiency increases at 10.75% o'clock, and effectiveness coefficient increases Δ FF=4.05%.
The advantage of described solar cell is the luminescence converter that constituted, and this transmodulator is with cover sheet form and silicon single crystal, polysilicon, and non-crystal silicon solar cell contacts and forms, and the cladding thickness of its conversion layer is δ=0.5～18 milligram/cm
2, reflection R is reduced to 50%.
The contriver finds, in the data of Fig. 2 a and Fig. 2 b, at silicon single crystal, when the thickness of the luminescent conversion layer on polysilicon solar cell surface is changed into δ=0.1～2.5mm, makes radiation excitation reflection R=60% reduce to R=31%.Reduce the reflection coefficient of silicon solar energy battery surface, increase luminescent activator, produce electronics and electric hole in p-n junction, increase electronics and electric hole concentration, the electrode parameter of silicon solar cell ought to increase.
The contriver finds that again similarly special luminescence converter depends on the dispersion that contains the oxygen inorganic fluorescent powder.In sum, for the miniature fluorescent powder grain that can adopt in luminescent conversion layer, its weight ratio is low, therefore effectively improves the conduction parameter of solar cell.The contriver adopts oxygen containing inorganic fluorescent powder when experiment, best particle size is d
50＜1 micron, best result is that the employing grain graininess is d
50≤ 0.8 micron fluorescent material (less than the maximum spectral wavelength of silicon solar cell).Once in experimental observation, find to stem from orthosilicate, boron, cerium, in the nano particle of europium and the aluminium garnet that contains cerium be d
50≤ 0.2 micron, the largest particle diameter of fluorescent material can not surpass d here
97≤ 4 microns, such particle under observation has coherency.Therefore, be 0.1≤d≤0.6 micron for the optimal selection of grain value.In this case, the efficient of silicon solar cell increases Δ η=15%.
Be similar to and have luminescence converter that the fluorescent material that contains the oxygen composition and inorganic silicon synthetics constitute like this when having senior staff officer's numerical value, the particle size of inorganic fluorescent powder wherein, the distribution in the luminescence converter scope consists of d
50≤ 0.8 micron, d
97＜4 microns, the dense weight ratio of fluorescent powder grain best in the organosilicon polymer is 0.05～3%.
As mentioned above, the present invention is main to be characterised in that, adopts the transmodulator of inorganic silicon luminescent conversion to be respectively with respect to three dissimilar silicon components for the parameter that promotes solar cell:
--the silicon single crystal thin plate is of a size of 6 inches;
--the polycrystalline sheet area size is 12cm
2And
--the area size of non-crystalline silicon thin plate is 12cm
2
Table 2 is to quote explanation at the parameter of three kinds of dissimilar solar cell components.
Table 2
| The composition type | Electric current J SC，A | Voltage V 0 | Effectiveness coefficient F F | Battery absolute efficiency η | ％ | |
| 1 | Six inches silicon single crystal 6 -- | 5.07 | 0.624 | 0.725 | 15.4 | +14.2 |
| 2 | Six inches silicon single crystal 6 -- | 5.28 | 0.632 | 0.727 | 15.8 | +12.4 |
| 3 | Area is 12cm 2Polysilicon | 0.396 | 0.5826 | 0.6627 | 12.46 | +11.2 |
| 4 | Area is 12cm 2Polysilicon | 0.388 | 0.5887 | 0.6641 | 11.93 | +16.4 |
| 5 | Area is 12cm 2Polysilicon | 0.396 | 0.5902 | 0.674 | 13.02 | +5.4 |
| 6 | Area is 12cm 2Polysilicon | 0.388 | 0.566 | 0.6853 | 11.90 | +20.3 |
| 7 | Amorphous silicon chip (α Si) | 0.201 | 0.494 | 0.468 | 7.8 | +19.6 |
| 8 | The silicon single crystal 6cm of standard 2 | 0.24 | 0.624 | 0.68 | 12.8 | 0 |
Shown in the data in the table 2, increasing the conduction parameter such as V
OC, I
SCAnd during FF, the mentioned solar cell that has multi-form luminescence converter on the silicon structure composition has the improved efficiency of 11.2～20.3% scopes.
Particularly, the contriver is at the invention research of silicon solar cell, comprise the silicon single crystal component, this battery has the inorganic silicon polymkeric substance and contains the transmodulator that oxygen fluorescent material is constituted, and solar cell composition, main silicon single crystal is of a size of 4 inches to 6 inches, and thickness is δ=360 micron, improved efficiency 14%.
Second target of silicon solar cell of the present invention invention comprises polysilicon, the luminescent conversion layer on organosilicon polymer, and wherein this polysilicon composition thickness is δ=220～360 micron, area is 6～256cm
2, improved efficiency 11.5%.
The 3rd target of silicon solar cell of the present invention invention comprises non-crystalline silicon and luminescence converter, and wherein this non-crystalline silicon thin plate α-Si thickness is δ=16～32 micron, and efficient increases to 7%.
This case those disclosed herein are a kind of of preferred embodiment, and the patent right category of this case is not all taken off in the change of part or modification and come from the technological thought of this case and be easy to the person of knowing by inference by the people who has the knack of this skill such as.
Claims (10)
1. organosilicon polymer, it is to be assembled by thermoplastic polymer and oxygen containing fluorescent material to form, wherein the molecular weight ranges of organosilicon polymer composition is M=10000～25000 carbons, the fluorescent material that is introduced in particulate state oxidation synthetics in the organosilicon polymer stems from orthosilicate, aluminate, phosphoric acid salt-vanadate and oxysulfide, its weight ratio are 0.05～10%, and with its synthetic luminescent conversion layer and with the surface coverage be combined into of silicon solar cell.
2. organosilicon polymer as claimed in claim 1, wherein this organosilicon polymer is introduced the silicate fluorescent powder particle in synthetic composition, and its stoichiometric equation is shown below:
(Me
2+O)
a(Si(O
1-pC
xD
yE
z)
2)
b
Wherein,
Me
+ 2=Ba
2+And/or Sr
2+And/or Ca
2+And/or Mg
2+And/or Eu
2+,
C=Hal=F
-And/or Cl
-And/or Br
-And/or I
-,
D=Chal=S
2-And/or Se
2-,
E＝N
3-，
p＝x/2+y+3z/2，
This fluorescent material stoichiometry is such as shown in the following numerical value: 0.0001≤x≤0.01,0.0001＜y≤0.01,0.0001＜z≤0.01, a=1,2,3,8; B=1,2,4, excite down at solar radiation, the radiation scope of this fluorescent material is by λ
1=500nm to λ
2=660nm.
3. organosilicon polymer as claimed in claim 1, wherein this organosilicon polymer has been introduced the fluorescent material of aluminate composition in synthetic component, and its stoichiometric equation is shown below:
Ln
3Al
5(0
1-pC
xD
yE
z)
12
Wherein
Ln=Y and/or Gd and/or La and/or Ce and/or Pr and/or Yb and/or Nd and/or Lu,
C=Hal=F
-And/or Cl
-And/or Br
-And/or I
-,
D=Cha1=S
2-And/or Se
2-,
E＝N
3-，
p＝x/2+y+3z/2，
This fluorescent material stoichiometry is such as shown in the following numerical value: 0.0001≤x≤0.01,0.0001＜y≤0.01,0.0001＜z≤0.01; In addition, the radiation scope of this fluorescent material is λ under the solar radiation optical excitation
1=490nm to λ
2=720nm.
4. organosilicon polymer as claimed in claim 1, the particle of the synthetizing phosphor powder quoted of this organosilicon polymer wherein, its stoichiometric equation is shown below:
Ln(P
1-nV
n)O
4
Wherein
Ln=Y and/or Gd and/or La and/or Ce and/or Pr and/or Yb and/or Nd and/or Lu, this fluorescent material stoichiometric ratio n changes into 0.0001＜n≤0.6, excites down at sunlight, and the radiation field of this fluorescent material is by λ
1=800nm to λ
2=1060nm.
5. organosilicon polymer as claimed in claim 1, the synthetizing phosphor powder particle quoted of this organosilicon polymer wherein, its stoichiometric equation is shown below:
Ln
2O
2S
1-qC
2q
Wherein
Ln=Y and/or Gd and/or La and/or Ce and/or Pr and/or Yb and/or Nd and/or Lu, C=Hal=F
-And/or Cl
-And/or Br
-And/or I
-, this fluorescent material stoichiometric ratio is 0.0001＜q＜0.5, and this fluorescent material can be excited by the sunlight near the infrared light field.
6. luminescent conversion layer, it comprises the organosilicon polymer that contains fluorescent powder grain as claimed in claim 1, and with tectal form, polysilicon with the top layer, silicon single crystal, the contact of the surface of the solar cell of non-crystalline silicon, this cover thickness is δ=0.5～3.8 milligram/cm
2, reflection R is less than 50%.
7. luminescent conversion layer as claimed in claim 6 wherein is distributed in the interior fluorescent powder grain size of this luminescent conversion layer scope by d
50≤ 0.8 micron to d
500.1 micron, best mass concentration is 0.05～3%.
8. silicon solar cell, it comprises the luminescence converter with silicon single crystal, and its luminescence converter of forming comprises luminescent conversion layer as claimed in claim 6, and this silicon single crystal is of a size of by 4
-6 inches, thickness is δ=180～360 micron, and efficiency of conversion surpasses 14%.
9. silicon solar cell, it comprises the luminescence converter with polysilicon, and this luminescence converter comprises luminescent conversion layer as claimed in claim 6, and the thickness of this polycrystalline sheet is δ=220～360 micron, improved efficiency γ=11.5%.
10. silicon solar cell, it comprises the luminescence converter with non-crystalline silicon, and this luminescence converter comprises luminescent conversion layer as claimed in claim 6, and this luminescence converter is derived from the silicon film of α-Si, and its thickness is δ=16～32 micron, improved efficiency 7%.
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| CNA2008101803670A CN101418218A (en) | 2008-11-25 | 2008-11-25 | Solar cell luminescent conversion layer and inorganic fluorescent powder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074608A (en) * | 2010-10-21 | 2011-05-25 | 罗维鸿 | Conversion layer for solar cell and synergy thereof |
| CN104813484A (en) * | 2012-09-28 | 2015-07-29 | 国家科学研究中心 | Photovoltaic component with a high conversion efficiency |
-
2008
- 2008-11-25 CN CNA2008101803670A patent/CN101418218A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074608A (en) * | 2010-10-21 | 2011-05-25 | 罗维鸿 | Conversion layer for solar cell and synergy thereof |
| CN102074608B (en) * | 2010-10-21 | 2012-08-29 | 罗维鸿 | Conversion layer for solar cell and synergy thereof |
| CN104813484A (en) * | 2012-09-28 | 2015-07-29 | 国家科学研究中心 | Photovoltaic component with a high conversion efficiency |
| CN104813484B (en) * | 2012-09-28 | 2017-09-29 | 国家科学研究中心 | photovoltaic module with high conversion efficiency |
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