CN103280474B - A kind of preparation method of rare earth ion doped EVA adhesive film used for encapsulation of solar battery - Google Patents
A kind of preparation method of rare earth ion doped EVA adhesive film used for encapsulation of solar battery Download PDFInfo
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Abstract
The invention discloses the preparation method of a kind of rare earth ion doped EVA adhesive film used for encapsulation of solar battery, comprise the following steps: preparation Eu (OH)3With Er (OH)3；Prepare europium acrylate or acrylic acid erbium；Vinyl acetate and the copolymerization of europium acrylate；Make EVA/VAA Eu or EVA/VAA Er film.Have employed the doping method of multielement, make encapsulating film ultraviolet band and infrared band to be changed simultaneously, be supplied to solar cell after being converted into visible waveband and absorb.The present invention, when producing europium acrylate, has abandoned the mode that originally direct acrylic acid and europium oxide react, because the method cannot be used for preparing acrylic acid erbium.The method that the present invention proposes, i.e. reacts with alkali first with rare earth oxide, then reacts with acrylic acid, can prepare acrylic acid erbium (or europium).When preparing europium acrylate and acrylic acid erbium, omit repeatedly still-process, and be the use of centrifugal process more easily, not only saved the time, also prevent the loss of raw material in still-process, improve productivity.
Description
Technical field
The invention belongs to technical field of solar batteries, particularly relate to a kind of used for encapsulation of solar battery rare earth ion doped
The preparation method of EVA adhesive film.
Background technology
Solar energy as a kind of can the clean energy resource of continuous utilization, have huge exploitation application potential.Photovoltaic
The exploitation of generation technology starts from the 1950's, is once restricted owing to cost is the highest in its early stage of development, but along with skill
The progress of art, photoelectric transformation efficiency is significantly improved, and cost constantly declines, and range of application is more and more wider.In the whole world at present
Under Energy situation intense situation increasingly, solar energy power generating, as a kind of continuable alternative energy source, obtains in recent years
To the attention of national governments, its growth momentum is the swiftest and the most violent.But, compared with other energy, the cost of current solar electrical energy generation
Or of a relatively high, difficult and conventional energy resource is competed.Solar cell is only in the case of service life is considerably long, in price
Can be at war with other energy.Occupy the core in the crystal silicon solar battery component of photovoltaic market share more than 80% at present
Heart part (silion cell) fully achieves the service life of more than 30 years, but cell piece is played fixing, seal and protect work
Transparent polymer EVA adhesive film in the weather environment that outdoor is severe easy aging yellowing, even degumming be full of cracks, make battery pack
Part ruptures or is corroded by weather, thus cause making the electricity conversion of whole battery component to decline or Damage by Short Circuit and
Lost efficacy.Therefore, the character of encapsulating material is very important to the long-term behaviour of battery component, and the life-span of solar cell must not
Do not limited by the working life institute of the shortest EVA adhesive film of life-span in battery component, here it is usually said " short plank law ".
The working life of EVA adhesive film or anti-weather-aging property become one of key factor into determining the battery component life-span, at battery
In assembly, it be one easy to be out in the cold but be the parts that must not despise in practicality.As can be seen here, cell piece one-tenth is being reduced
This, improve while photoelectric transformation efficiency, study natural weather condition (round the clock with circular temperature loads, ultraviolet radiation,
Moisture, air pollution etc.) under, optical, electrical reliable with stable mechanical property, service life, the EVA adhesive film of length was photovoltaic profit
The aspect that can not be ignored in, is also to develop the good solar module product of cost performance and reduce solar electrical energy generation
One of important channel of cost.
Due to the restriction of the energy gap of solar cell, the energy gap such as amorphous silicon film battery is about left at 1.7eV
The right side, the energy gap of microcrystalline silicon film battery can regulate between 1.1eV～1.4eV.Therefore battery can only absorb solar spectrum
Middle visible ray then can not be effectively absorbed to nearly red light portion, the sunshine of ultra-violet bands and infrared ray wave band.Doping
After EVA be a kind of encapsulating material that nonabsorable wave band can be converted into absorbable wave band.Improve battery packaging material light to turn
Changing rate, oneself becomes a problem in the urgent need to address of Solar use.
Rare earth luminescent material has many advantages: photoluminescent band is narrow, light absorpting ability is strong, conversion efficiency is high, launch wavelength
Distributed area field width, process based prediction model are stable, high temperature resistant, can bear high-energy radiation and the effect of strong ultraviolet light.Just these
Excellent performance, makes rare earth compound become the main study subject seeking new and high technology material.Currently used silicon metal is too
The feature of sun energy battery is: sunshine generating efficiency in the wave-length coverage that wavelength 750 nm is main is higher.Accordingly, there exist not
The solar ultraviolet light of 250 ~ 400 nm can be utilized, it is impossible to the problem effectively utilizing the sunshine of all wave bands.Ripple by exploitation
Long coversion material, then can effectively utilize the sunshine of various wavelength.Most study is a series of of ion centered by europium
Organic coordination compound or inorganic compound, simultaneously because sending the strongest feature ruddiness under the irradiation of ultraviolet light, made turns
Photo etching is existing on agricultural film more successfully to be applied, particularly preferable with Compatibility in Plastics organic coordination compound class light conversion agent.But
The application in the encapsulating material-EVA adhesive film of solar cell of this rare-earth light conversion agent seldom has been reported that.If in EVA adhesive film
In also add rare-earth light conversion agent, the ultraviolet portion in sunshine can be converted into and be prone to be absorbed by monocrystaline silicon solar cell
Ruddiness, then can effectively utilize the sunshine of various wavelength, improve the conversion efficiency of battery.
Owing to elements a lot of in rare earth have peculiar character, so trial is used low cost technology to exist by we simultaneously
Mixing europium and two kinds of rare earth elements of erbium in EVA, the new EVA encapsulating film made can be by nonabsorable infrared wavelength and ultraviolet waves
Long light is converted into the absorbable wavelength of silicon solar cell, thus improves the operating efficiency of solar cell.
Prior art
Owing to rare earth ion has a lot of d or f unoccupied orbitals, they are easily formed in the forming process of polymer
Close.If direct europium or the oxide of erbium or inorganic salts directly mix with EVA, they can not be compatible, and it is right to be difficult to be prepared as
The material of visible transparent, thus have impact on the transparency of material.And, rare earth is less with the compatibility of EVA, and they are difficult to all
Being scattered in EVA matrix evenly, easily cause Local enrichment and occur that fluorescence is broken to go out, rare earth is belonged to by the most different polymerization methodses
The various performances of polymeric material have a great impact.It is said that in general, rare earth polymer is divided into doping type and bonding type, doping type
Refer to that rare earth or rare earth compound are directly blended with polymer, and bonding type refers to rare earth or rare earth chemical combination by certain mode
Thing and polymer generation chemical reaction, make to be formed between them chemical bond, be blended on a molecular scale.Rare-earth europium is mixed at present
Miscellaneous eva film synthetic method, has following several, but the eva film synthetic method of rare earth erbium doping, as far as the applicant is aware,
Have not been reported.
1 simple doping method
Rear-earth-doped polymer is mainly realized by mechanical blending, melt blending, be a kind of easy applicability wide and
Practical method.But, this method has an obvious shortcoming: be difficult to ensure that the two-phase interface of composite has good
Good affinity, the performance of material is difficult to improve significantly.
2 polymerizations
Bonding type rare earth polymer be by rare earth monomer homopolymerization or with other monomer copolymerization, the direct chain of rare earth ion is together in height
On strand, effectively overcome the shortcoming that rare earth is poor with polymer compatibility, affinity is poor, for obtaining the rare earth of high transmission rate
Functionally structure provides possible approach.
3 reacting processing methods
Use and there is some macromolecule key as interface bond that can produce the functional group that extensive chemical is bonded with rare earth
Connect agent, under conditions of high temperature, high shear, it is achieved rare earth disperses, and then realizes the common friendship of functional group during cross moulding
Connection.
4 in-situ compositings
Synthesize the polymer of multiple different rare earth monomers with in-situ compositing design, and its photoluminescent property studied,
And analyze the impact on Polymer optical performance of different ligands, inert ion and the organic ligand relative scale with rare earth ion.
In above four kinds of rear-earth-doped EVA synthetic methods, although operation is simple for simple doping method, but compatible
Property very poor, and reacting processing method is excessively strict to the requirement of reaction condition, causes application aspect to be restricted, in-situ compositing
The preparation of rare earth part is the most loaded down with trivial details, it is difficult to realize mass production.The present invention uses in-situ compounding process, preparation to mix rare earth hetero metal
Eva film material, in rare earth introduces unsaturated hydrochlorate, the unsaturated character of the unsaturated hydrochlorate of recycling, rare earth is introduced
EVA material is prepared the eva film material containing rare earth.
Prior art only mixes europium in EVA, simply the ultraviolet portion in sunshine is transformed into visible light part,
And owing to using the way of distillation in preparation process, the more difficult control of course of reaction, production efficiency is low.Meanwhile, in existing technology
In, there is no the report of the EVA synthetic method about er-doped.
Utilize the eva film mixing europium and er-doped that the technology of the present invention synthesizes, can in sunshine can not be by crystalline silicon
The wavelength that solar cell effectively the absorbs ultraviolet light less than 400 nm, and effectively can not be absorbed by thin film silicon solar cell
The wavelength near infrared light more than 900 nm, is converted into the visible ray easily absorbed by crystalline silicon and thin film silicon solar cell, increases
Add the EVA absorptivity to visible ray, thus improve the photoelectric transformation efficiency of crystal silicon solar energy battery, it also avoid simultaneously
The flavescence caused owing to EVA absorbs ultraviolet light causes the decline of its light transmittance, then causes the reduction of battery efficiency.The most originally
The synthetic method that invention proposes is it is also possible that course of reaction is easily controlled, and production efficiency is high.
Summary of the invention
The purpose of the embodiment of the present invention is to provide the system of a kind of rare earth ion doped EVA adhesive film used for encapsulation of solar battery
Preparation Method, it is intended to solution prior art is only merely and the ultraviolet portion in sunshine is transformed into visible light part, and efficiency is not
High, it is difficult to fill up the loss of cost, and the infrared light occupying critical positions lacks and is difficult to be absorbed and used, and causes the wave of the energy
Take.During prior art operation, productivity is the highest, and bad control course of reaction, and speed is slow.The present invention can be effective
It is long to improve the reaction time, and productivity is low, and makes the convertible wave band of encapsulating film widen, original ultraviolet band expand to ultraviolet
Problem with infrared band.
The embodiment of the present invention is achieved in that the system of a kind of rare earth ion doped EVA adhesive film used for encapsulation of solar battery
Preparation Method, this preparation method comprises the following steps: preparation Eu (OH)3Or Er (OH)3；Prepare europium acrylate or acrylic acid erbium；Acetic acid
Vinyl acetate and the copolymerization of europium acrylate；Make EVA/VAA-Eu or EVA/VAA-Er film.
Further, preparation Eu (OH)3Or Er (OH)3 Method be:
Electronic balance accurately weighs the Eu of 1 mmol2O3(or Er2O3) it is dissolved in the hydrochloric acid of excess (6 mol/L), Xiang Rong
Liquid drips NaOH(0.1 mol/L) solution, produce white flock precipitate, continue dropping, till no longer producing precipitation.Will
This troubled liquor equivalent is sub-packed in 50 mL centrifuge tubes, rotates 5 min with the speed of 4000 revs/min.After rotation completes, take
Go out centrifuge tube and remove supernatant liquor, add deionized water, continue to put into centrifuge after stirring muddiness.Repeatedly after 2 ~ 3 times, use glass bar
Pick centrifuge tube clear liquid at the middle and upper levels, drip on pH test paper, then wash in neutrality completely, then repeat above-mentioned washing process in alkalescence.
After outwelling clear liquid, obtain Eu (OH)3Or Er (OH)3。
Further, the method preparing europium acrylate or acrylic acid erbium is:
In centrifuge tube, it is slowly dropped into acrylic acid, and constantly rocks stirring, until precipitation is completely dissolved, put into oil bath pan
In, distill at 120 DEG C, and put into magneton and be stirred, until original solution becomes thick, stop heating, take out cooling.Then
Pour absolute ethyl alcohol inwards into wash, cleaning solution equivalent is sub-packed in centrifuge tube, take after rotating 5min with 4000 revs/min
Go out, remove supernatant liquor, after back and forth washing 2 ~ 3 times with this, be precipitated europium acrylate or acrylic acid erbium.
Further, vinyl acetate with the method for the copolymerization of europium acrylate is:
In the there-necked flask of 250 mL, the ethanol of the europium acrylate or acrylic acid erbium and 70 mL that add above-mentioned preparation exists
65 DEG C of dissolvings, dropping 7.0g vinyl acetate and 3.0 mL contain the methyl alcohol of 0.02 g azodiisobutyronitrile the most respectively
Solution, 0.5 h dropping is complete, is incubated and continues reaction 2 h in 65 ~ 70 DEG C, is then down to room temperature, obtains vinyl acetate and third
The ethanol alcoholic solution of olefin(e) acid europium (or erbium) copolymer (VAA-Eu or VAA-Er).Boil off ethanol at 80 DEG C, obtain solid after drying
VAA-Eu or VAA-Er, i.e. vinyl acetate and the copolymer of europium acrylate (or erbium), its reaction equation is
Wherein
Further, the method for masking is:
The EVA of 100 mass fractions is separately added into VAA-Eu or VAA-that mass fraction is 0.01 ~ 0.2 % of Eu or Er
Er, after utilizing banbury banburying being blended 10 min at 100 DEG C, then on the open type plastic purificating set that temperature is 65 DEG C, with triangle
Thin logical 5 times of bag method, is finally the 0.15 uniform slice of mm with thickness；By the blend of slice, use electroplating surface, die cavity height
Be the mould of 0.15 mm at 150 DEG C, after hot pressing 15min, 20 ~ 25 DEG C cooling 10min, make EVA/VAA-Eu or EVA/
VAA-Er film.
When preparing europium acrylate and acrylic acid erbium, use new transition method so that reactive mode more generalization.
Abandon the process originally repeatedly distilled, but used centrifugal process instead, shortened the cycle of whole reaction, and prevent distillation
Time significant loss, improve productivity.This programme has not only absorbed the ultraviolet band in sunshine, also uses solar energy
The infrared band that battery cannot absorb, thus improve efficiency.And the EVA being doped with rare earth element has better than originally
Anti-aging property etc..
Accompanying drawing explanation
Fig. 1 EVA/VAA-Eu film emission spectrum under the light that wavelength is 393nm excites；
Fig. 2 EVA/VAA-Er film emission spectrum under the light that wavelength is 980nm excites；
The transmitted spectrum of Fig. 3 EVA/VAA-Eu film；
The transmitted spectrum of Fig. 4 EVA/VAA-Er film.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
The embodiment of the present invention have employed the doping method of multielement, makes the encapsulating film can by ultraviolet band and infrared band simultaneously
Conversion, is supplied to solar cell and absorbs after being converted into visible waveband.The present invention, when producing europium acrylate, has abandoned original straight
Connect the mode reacted with acrylic acid and europium oxide, because the method cannot be used for preparing acrylic acid erbium.The present invention proposes
Method, i.e. reacts with alkali first with rare earth oxide, then reacts with acrylic acid, can prepare acrylic acid erbium (or europium).
When preparing europium acrylate and acrylic acid erbium, omit repeatedly still-process, and be the use of centrifugal process more easily, not only
Save the time, also prevent the loss of raw material in still-process, improve productivity.
Below in conjunction with drawings and Examples, the present invention is further illustrated.
1.1 main raw material
Vinyl acetate (VA): technical pure, Nanjing Jin Peng Chemical Co., Ltd.
Azodiisobutyronitrile: technical pure, Dongguan City Qin Wei Chemical Co., Ltd.
Acrylic acid (AA): technical pure, Shandong Bock chemistry limited company
Europium oxide (Eu2O3), erbium oxide (Er2O3): technical pure, Ganzhou Jin Chengyuan new material Co., Ltd
Ethene and vinyl acetate (EVA): technical pure, vinyl acetate content is 26%, and Taiwan plastic cement industry share is limited
Company
1.2 main production equipment
Banbury, open type plastic purificating set, centrifuge, oil bath pan, magnetic stirring apparatus, electronic balance
1.3 main testers
Ultraviolet-uisible spectrophotometer, sepectrophotofluorometer
1.4 preparations Eu (OH)3Or Er (OH)3
Electronic balance accurately weighs the Eu of 1 mmol2O3(or Er2O3) it is dissolved in the hydrochloric acid of excess (6 mol/L), Xiang Rong
Liquid drips NaOH(0.1 mol/L) solution, produce white flock precipitate, continue dropping, till no longer producing precipitation.Will
This troubled liquor equivalent is sub-packed in 50 mL centrifuge tubes, rotates 5 min with the speed of 4000 revs/min.After rotation completes, take
Go out centrifuge tube and remove supernatant liquor, add deionized water, continue to put into centrifuge after stirring muddiness.Repeatedly after 2 ~ 3 times, use glass bar
Pick centrifuge tube clear liquid at the middle and upper levels, drip on pH test paper, then wash in neutrality completely, then repeat above-mentioned washing process in alkalescence.
After outwelling clear liquid, obtain Eu (OH)3Or Er (OH)3。
1.5 prepare europium acrylate or acrylic acid erbium
In centrifuge tube, it is slowly dropped into acrylic acid, and constantly rocks stirring, until precipitation is completely dissolved, put into oil bath pan
In, distill at 120 DEG C, and put into magneton and be stirred, until original solution becomes thick, stop heating, take out cooling.Then
Pour absolute ethyl alcohol inwards into wash, cleaning solution equivalent is sub-packed in centrifuge tube, take after rotating 5min with 4000 revs/min
Go out, remove supernatant liquor, after back and forth washing 2 ~ 3 times with this, be precipitated europium acrylate or acrylic acid erbium.
1.6 vinyl acetates and the copolymerization of europium acrylate
In the there-necked flask of 250 mL, the ethanol of the europium acrylate or acrylic acid erbium and 70 mL that add above-mentioned preparation exists
65 DEG C of dissolvings, drip 7.0 g vinyl acetates and first that 3.0 mL contain 0.02 g azodiisobutyronitrile the most respectively
Alcoholic solution, 0.5 h dropping complete, be incubated in 65 ~ 70 DEG C continue reaction 2 h, be then down to room temperature, obtain vinyl acetate with
The ethanol alcoholic solution of europium acrylate (or erbium) copolymer (VAA-Eu or VAA-Er).Boil off ethanol at 80 DEG C, consolidated after drying
Body VAA-Eu or VAA-Er, i.e. vinyl acetate and the copolymer of europium acrylate (or erbium), its reaction equation is
Wherein
1.7 masking
The EVA of 100 mass fractions is separately added into VAA-Eu or VAA-that mass fraction is 0.01 ~ 0.2% of Eu or Er
Er, after utilizing banbury banburying being blended 10 min at 100 DEG C, then on the open type plastic purificating set that temperature is 65 DEG C, with triangle
Thin logical 5 times of bag method, is finally about the 0.15 uniform slice of mm with thickness.By the blend of slice, use electroplating surface, die cavity high
Degree be the mould of 0.15 mm at 150 DEG C, after hot pressing 15 min, 20 ~ 25 DEG C cooling 10 min, make EVA/VAA-Eu or
EVA/VAA-Er film.
1.8 Properties Testing
Fig. 1 and Fig. 2 sets forth EVA/VAA-Eu and EVA/VAA-Er film at the light that wavelength is 393nm and 980nm
Emission spectrum under exciting.Ultraviolet light near 393nm can be changed into it can be seen that mix the eva film after europium
Visible ray near 590-700nm, and the eva film after er-doped can change into 540-the near infrared light near 980nm
Visible ray near 670nm.The solar energy of 500-700nm is can be effectively by by crystalline silicon and thin film silicon solar cell
Absorb, such that it is able to increase the photoelectric transformation efficiency of solar cell.
EVA/VAA-Eu and EVA/VAA-Er that Fig. 3 and Fig. 4 sets forth the europium mixed with different quality mark and erbium is thin
The transmitted spectrum of film.It can be seen that mix the transmitance of the eva film after rare-earth europium or erbium compared with not mixing, have
Bigger raising.When the dopant dose of europium or erbium increases, and the transmitance of eva film starts to increase, and then reduces.When mixing europium or erbium
Mass fraction when being 0.05%, the transmitance of film is maximum.Compared with the eva film being not incorporated into europium or erbium, mix europium or erbium
Film is risen to 96.4% to the transmitance of the light that wavelength is 600nm by 90.8%, has increased and decreased 5.6%.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (5)
1. the preparation method of a rare earth ion doped EVA adhesive film used for encapsulation of solar battery, it is characterised in that this preparation method
Comprise the following steps:
Preparation Eu (OH)3Or Er (OH)3；
Prepare europium acrylate or acrylic acid erbium；
Vinyl acetate and the copolymerization of europium acrylate；
Make the mixture film of EVA and VAA-Eu or the mixture film of EVA and VAA-Er；
VAA-Eu, i.e. vinyl acetate and the copolymer of europium acrylate；VAA-Er, i.e. vinyl acetate and the copolymerization of acrylic acid erbium
Thing.
The preparation method of rare earth ion doped EVA adhesive film used for encapsulation of solar battery the most as claimed in claim 1, its feature exists
In, preparation Eu (OH)3Or Er (OH)3Method be:
Electronic balance accurately weighs the Eu of 1.0 mmol2O3Or Er2O3It is dissolved in the hydrochloric acid of excess, in solution, instills NaOH molten
Liquid, produces white flock precipitate, continues dropping, till no longer producing precipitation；This troubled liquor equivalent is sub-packed in 50 mL
In centrifuge tube, rotate 5 min with the speed of 4000 revs/min；After rotation completes, take out centrifuge tube and remove supernatant liquor, add
Deionized water, continues to put into centrifuge after stirring muddiness；Repeatedly after 2 ~ 3 times, pick centrifuge tube clear liquid at the middle and upper levels with glass bar, drip
On pH test paper, then wash in neutrality completely, then repeat above-mentioned washing process in alkalescence；After outwelling clear liquid, obtain Eu (OH)3Or
Er(OH)3。
The preparation method of rare earth ion doped EVA adhesive film used for encapsulation of solar battery the most as claimed in claim 1, its feature exists
In, the method preparing europium acrylate or acrylic acid erbium is:
In centrifuge tube, it is slowly dropped into acrylic acid, and constantly rocks stirring, until precipitation is completely dissolved, put in oil bath pan,
Distill at 120 DEG C, and put into magneton and be stirred, until original solution becomes thick, stop heating, take out cooling；Then fall
Enter absolute ethyl alcohol to wash, cleaning solution equivalent is sub-packed in centrifuge tube, take out after rotating 5 min with 4000 revs/min, go
Supernatant liquor, is precipitated europium acrylate or acrylic acid erbium after back and forth washing 2 ~ 3 times with this.
The preparation method of rare earth ion doped EVA adhesive film used for encapsulation of solar battery the most as claimed in claim 1, its feature exists
In, vinyl acetate with the method for the copolymerization of europium acrylate is:
In the there-necked flask of 250 mL, add the europium acrylate of above-mentioned preparation or the ethanol of acrylic acid erbium and 70 mL at 65 DEG C
Dissolve, drip 7.0 g vinyl acetates the most respectively and methyl alcohol that 3.0 mL contain 0.02 g azodiisobutyronitrile is molten
Liquid, 0.5 h dropping is complete, is incubated and continues reaction 2h in 65 ~ 70 DEG C, is then down to room temperature, obtains vinyl acetate and acrylic acid
Europium or the ethanol alcoholic solution of erbium copolymer VAA-Eu or VAA-Er；Boil off ethanol at 80 DEG C, obtain after drying solid VAA-Eu or
VAA-Er, i.e. vinyl acetate and europium acrylate or the copolymer of erbium, its reaction equation is:
Wherein。
The preparation method of rare earth ion doped EVA adhesive film used for encapsulation of solar battery the most as claimed in claim 1, its feature exists
In, the method for masking is:
The EVA of 100 mass fractions is separately added into VAA-Eu or VAA-Er that mass fraction is 0.01 ~ 0.2 % of Eu or Er,
After utilizing banbury banburying being blended 10 min at 100 DEG C, then on the open type plastic purificating set that temperature is 65 DEG C, with triangle bag
Thin logical 5 times of method, is finally the 0.15 uniform slice of mm with thickness；By the blend of slice, employing electroplating surface, die cavity height are
The mould of 0.15 mm is at 150 DEG C, after hot pressing 15 min, 20 ~ 25 DEG C of cooling 10 min, make the mixing of EVA and VAA-Eu
Thing film or the mixture film of EVA and VAA-Er.
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|---|---|---|---|---|
| CN102093628A (en) * | 2010-12-31 | 2011-06-15 | 南京大学 | Ethylene vinyl acetate (EVA) adhesive film for light conversion |
| DE102011051918A1 (en) * | 2011-07-18 | 2013-01-24 | Schott Solar Ag | Photovoltaic thermal (PVT) collector has solar cell extended along radiation-side transparent element, and downstream heat exchanger that is provided for transferring heat to fluid leading element |
| CN102965039A (en) * | 2012-12-17 | 2013-03-13 | 无锡量紫谷新材料科技发展有限公司 | Light-conversion EVA (Ethylene Vinyl-Acetate Copolymer) adhesive film for solar battery and preparation method thereof |
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| CN103280474A (en) | 2013-09-04 |
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