A kind of flexible solar battery novel stainless steel substrate
Technical field
The present invention relates to thin-film solar cells flexible base board preparation technical field, specially a kind of flexible solar electricity
Pond novel stainless steel substrate.
Background technique
Thin-film solar cells belongs to solar battery of new generation, can be divided into hard substrate and flexible substrate two by substrate type
Major class.In the past, flexible thin-film solar cell was mainly using polymer P ET and PEN as conductive substrates, but the study found that polymer
The low melting point of substrate and it is easy to aging the problems such as limit the preparation and use of battery.Therefore, seek a kind of suitable flexible material
Become the important topic on flexible solar battery application study road as substrate used for solar batteries.
In many materials, in view of stainless steel have high temperature resistant, corrosion-resistant, electric conductivity is superior, ductility is good and at
The advantages that this is cheap, stainless steel, which becomes, replaces PET and PEN, as the preferred material of thin-film solar cells flexible substrate.But
Be stainless steel surface roughness it is smaller, show the state of smoother, this makes its fexible film with solar battery
Between adhesive property it is not good enough, cause it that can not effectively meet the requirement used.
The study found that the improvement of Substrate Surface Roughness is conducive to improve the bond properties between film and matrix, and film
The rolling of stainless steel substrate used for solar batteries is a complicated forming process, is having the same of strict demand to substrate flatness
When, substrate topography (including surface roughness, surface texture) is required higher.
Therefore, how to effectively improve between thin-film solar cells stainless steel substrate and the fexible film of solar battery
Adhesive property become current urgent problem.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of flexible solar battery novel stainless steel substrate, solutions
It has determined current flexible solar battery stainless steel substrate, the adhesive property between the fexible film of solar battery is inadequate
Well, the technical issues of making it that can not effectively meet requirement.
(2) technical solution
To achieve the above object, the invention provides the following technical scheme:
A kind of flexible solar battery novel stainless steel substrate, including stainless steel foil, in one side surface of stainless steel foil
The compound one layer of Cu base elasticity adhesion layer of central part, a side surface of Cu base elasticity adhesion layer and a side surface of stainless steel foil are in
The elastic connection of integrated molding formula is arranged;
Wherein, the preparation method of novel stainless steel substrate includes:
Using cupric sulfate pentahydrate as raw material, using potassium borohydride as reducing agent, using polyvinylpyrrolidine copper as dispersing agent, in highly basic
Under the conditions of, Liquid reduction reaction process occurs, nano Cu particle is prepared, the nano Cu particle is first raw with methyl vinyl silicone rubber
Glue be kneaded at uniform mixed system, then with raw material tetramethyl-ring tetrasiloxane, coupling agent allyl glycidyl ether, catalyst
Chloroplatinic acid and adhesive polymethyl methacrylate are reacted under the protective effect of nitrogen, and reaction product is by subtracting
Pressure distillation, prepares thick liquid, which is coated uniformly on to the central part of one side surface of stainless steel foil, Zhi Hou
Curing process is dried under vacuum condition, the Cu base elasticity adhesion layer for being adhered to stainless steel foil surface is prepared, to make
Standby novel stainless steel substrate out.
Preferably, the Cu base elasticity adhesion layer includes the raw material of following parts by weight: 13 parts of potassium borohydrides, 0.1 part of hydrogen
Sodium oxide molybdena, 12.5~25 parts of cupric sulfate pentahydrates, 0.5~1.5 part of polyvinylpyrrolidine copper, 25~40 parts of methyl vinyl silicone rubbers
Raw rubber, 20~35 parts of tetramethyl-ring tetrasiloxanes, 10~20 parts of allyl glycidyl ethers, 0.5 part of chloroplatinic acid, 5~10 parts it is poly-
Methyl methacrylate.
Preferably, the Cu base elasticity adhesion layer includes the raw material of following parts by weight: 13 parts of potassium borohydrides, 0.1 part of hydrogen
Sodium oxide molybdena, 18 parts of cupric sulfate pentahydrates, 1 part of polyvinylpyrrolidine copper, 30 parts of methyl vinyl silicon kautschuks, 30 parts of tetramethyl-rings
Tetrasiloxane, 15 parts of allyl glycidyl ethers, 0.5 part of chloroplatinic acid catalyst and 8 parts of polymethyl methacrylates.
Preferably, the novel stainless steel substrate preparation method the following steps are included:
Step 1: mainly with 13 parts of potassium borohydrides, 0.1 part of sodium hydroxide, 12.5~25 parts of cupric sulfate pentahydrates, 0.5~1.5
Part polyvinylpyrrolidine copper is raw material, prepares Cu particle of the average grain diameter within the scope of 50~100nm;
Step 2: first by 25~40 parts of methyl vinyl silicon kautschuks and the Cu particle of above-mentioned preparation in torque rheometer
It is middle to be kneaded uniformly, it is heat-treated 20~60min at a temperature of 130~170 DEG C, is cooled to room temperature, uniform mix is prepared
Zoarium system;
Step 3: the mixed system of above-mentioned preparation is added to equipped with agitating device, heating device and nitrogen protection device
Reactor in, be passed through nitrogen protection, revolving speed be 120~180rpm stirring rate under, by 20~35 parts of tetramethyl cyclotetrasiloxanes
Siloxanes, 10~20 parts of allyl glycidyl ethers, 0.5 part of chloroplatinic acid catalyst and 5~10 parts of polymethyl methacrylates according to
It is secondary to be added in above-mentioned reactor, switch to stir under 200~300rpm;
Later, 0.5h is reacted at being 20 DEG C in temperature, be warming up to 50~70 DEG C with the rate of 2 DEG C/min and reacts 1~2h,
80~120 DEG C are warming up to the rate of 2 DEG C/min again and reacts 1~3h, and reaction mixture is in 130~150 DEG C of temperature, pressure
Under 4kPa, vacuum distillation is steamed to no low-boiling-point substance, and thick liquid is prepared;
Step 4: the above-mentioned thick liquid prepared is coated uniformly on it is with a thickness of 0.3mm, width 100mm, length
The central part of one side surface of stainless steel foil of 100mm, stainless steel foil is put into vacuum oven, in vacuum degree 133Pa, temperature
It is dried in vacuo 1~3h at 60~80 DEG C of degree, the Cu base elasticity adhesion layer for being adhered to stainless steel foil surface is prepared, to prepare
Novel stainless steel substrate out.
(3) beneficial technical effect
Compared with prior art, the present invention has following beneficial technical effect:
The present invention is with cupric sulfate pentahydrate (CuSO4·5H2O) for raw material, with potassium borohydride (KBH4) it is reducing agent, with poly- second
Alkene pyrrolidines copper (PVP) is dispersing agent, under basic conditions, Liquid reduction reaction process occurs, nano Cu particle is prepared, this is received
Rice Cu particle is first kneaded with methyl vinyl silicon kautschuk into uniform mixed system, then with raw material tetramethyl cyclotetrasiloxane silicon oxygen
Alkane, coupling agent allyl glycidyl ether, catalyst chloroplatinic acid and adhesive polymethyl methacrylate (PMMA), in nitrogen
It under protective effect, is reacted, reaction product prepares thick liquid by vacuum distillation, and the thick liquid is uniform
Central part coated in one side surface of stainless steel foil for being 100mm with a thickness of 0.3mm, width 100mm, length, Zhi Hou
Curing process is dried under vacuum condition, the Cu base elasticity adhesion layer for being adhered to stainless steel foil surface is prepared, to make
Standby novel stainless steel substrate out;
And the volume resistivity of the Cu base elasticity adhesion layer on the novel stainless steel substrate prepared of the present invention be 1.32~
Removing of the peel strength between 147~154N/cm and fexible film (PI) between 1.46 Ω cm and stainless steel foil is strong
Degree is 136~139N/cm, rebound degree is 82~85%;
Therefore, the novel stainless steel substrate that the present invention prepares not only has excellent electric conductivity, but also and solar energy
Adhesive property between the fexible film of battery is also ideal, and the use that can effectively meet solar cell flexible substrate is wanted
It asks.
Detailed description of the invention
Fig. 1 is a kind of main view of flexible solar battery novel stainless steel substrate of the present invention;
Fig. 2 is a kind of top view of flexible solar battery novel stainless steel substrate of the present invention.
It is indicated in figure: 1- stainless steel foil, 2-Cu base elasticity adhesion layer.
Specific embodiment
Raw material used in the following embodiment is as follows:
The specification of stainless steel foil: with a thickness of 0.3mm, width 100mm, length 100mm;
Cupric sulfate pentahydrate (CuSO4·5H2O), pure, Shanghai chemical reagent Co., Ltd is analyzed;
Polyvinylpyrrolidine copper (PVP), trade mark K30, Nanjing Rui Ze Fine Chemical Co., Ltd;
Potassium borohydride (KBH4), analyze pure, fertile soil Chemical Co., Ltd., Anhui Province;
Sodium hydroxide (NaOH) analyzes pure, Tianjin Ke Miou reagent Co., Ltd;
Dehydrated alcohol (C2H5OH), pure, Anhui An Te biochemistry corporation,Ltd. is analyzed;
Methyl vinyl silicon kautschuk, 110 serial raw rubbers, Jia Haixin silicon rubber Co., Ltd, Shenzhen;
Tetramethyl-ring tetrasiloxane, technical grade, Shanghai Gui Shan high molecular material Co., Ltd;
Allyl glycidyl ether, technical grade, Qufu City Huarong new chemical materials Co., Ltd;
Chloroplatinic acid analyzes pure, Shenyang Research Institute of Nonferrous Metals;
Polymethyl methacrylate (PMMA), technical grade, Changsha Jia Zhen Biotechnology Co., Ltd;
Novel stainless steel substrate, referring to Fig. 1 and Fig. 2, including being 100mm's with a thickness of 0.3mm, width 100mm, length
Stainless steel foil 1, the compound one layer of Cu base elasticity adhesion layer 2 of central part in 1 one side surface of stainless steel foil, Cu base elasticity adhesion layer
2 side surface and a side surface of stainless steel foil 1 are arranged in the elastic connection of integrated molding formula;
Wherein, Cu base elasticity adhesion layer 2 the preparation method is as follows:
Embodiment one:
(1) preparation of Cu particle of the average grain diameter within the scope of 50~100nm:
A. 13g potassium borohydride (KBH is first weighed4) be dissolved in 250mL deionized water, then 0.1g sodium hydrate particle is added
Enter in above-mentioned potassium borohydride aqueous solution, adjust PH to 12, preparation obtains alkaline potassium borohydride aqueous solution;
B. the mixed solvent being first made of 300mL deionized water and 200mL dehydrated alcohol, is added to equipped with titration outfit
In the reactor of magnetic stirring apparatus, in the case where revolving speed is the stirring rate of 120rpm, first by 12.5g cupric sulfate pentahydrate
(CuSO4·5H2O it) is added in reactor, then 0.5g polyvinylpyrrolidine copper (PVP) is added in reactor, later, switch to
30min is stirred under 300rpm;
C. in the case where revolving speed is the stirring rate of 120rpm, by the alkaline potassium borohydride aqueous solution of above-mentioned preparation with 0.5mL/s
Titration speed be added drop-wise in reactor, after being added dropwise, switch to stir 10min under 200rpm;
D. after, it is filtered processing, 3 washings are carried out using product of the deionized water to generation, after washing, are put
Enter in vacuum oven, 6h be dried in vacuo under vacuum degree 133Pa, temperature 60 C, that is, be prepared average grain diameter 50~
Cu particle within the scope of 100nm;
(2) first 25g methyl vinyl silicon kautschuk and the Cu particle of above-mentioned preparation are kneaded in torque rheometer
It is even, it is heat-treated 20min at a temperature of 130 DEG C, is cooled to room temperature, uniform mixed system is prepared;
(3) mixed system of above-mentioned preparation is added to equipped with the anti-of agitating device, heating device and nitrogen protection device
It answers in device, is passed through nitrogen protection, in the case where revolving speed is the stirring rate of 120rpm, by 20g tetramethyl-ring tetrasiloxane, 10g allyl
Base glycidol ether, 0.5g chloroplatinic acid catalyst and 5g polymethyl methacrylate (PMMA) sequentially add in above-mentioned reactor,
Switch to stir under 200rpm;
Later, 0.5h is reacted at being 20 DEG C in temperature, 50 DEG C is warming up to the rate of 2 DEG C/min and reacts 1h, then with 2
DEG C/rate of min is warming up to 80 DEG C and reacts 1h, reaction mixture is at 130 DEG C of temperature, pressure 4kPa, vacuum distillation to nothing
Low-boiling-point substance steams, and thick liquid is prepared;
(4) the above-mentioned thick liquid prepared is coated uniformly on and is with a thickness of 0.3mm, width 100mm, length
The central part of 1 one side surface of stainless steel foil of 100mm, stainless steel foil 1 is put into vacuum oven, in vacuum degree 133Pa,
It is dried in vacuo 1h under temperature 60 C, Cu base elasticity adhesion layer 2 is prepared;
(5) the Cu base elasticity adhesion layer 2 of above-mentioned preparation is tested for the property, volume resistivity be 1.32 Ω cm,
The peel strength that peel strength between stainless steel foil is 147N/cm between fexible film (PI) is 136N/cm, rebound
Rate is 82%.
Embodiment two:
(1) preparation of Cu particle of the average grain diameter within the scope of 50~100nm:
A. 13g potassium borohydride (KBH is first weighed4) be dissolved in 250mL deionized water, then 0.1g sodium hydrate particle is added
Enter in above-mentioned potassium borohydride aqueous solution, adjust PH to 12, preparation obtains alkaline potassium borohydride aqueous solution;
B. the mixed solvent being first made of 300mL deionized water and 200mL dehydrated alcohol, is added to equipped with titration outfit
In the reactor of magnetic stirring apparatus, in the case where revolving speed is the stirring rate of 150rpm, first by 18g cupric sulfate pentahydrate (CuSO4·
5H2O it) is added in reactor, then 1g polyvinylpyrrolidine copper (PVP) is added in reactor, later, switch to stir under 400rpm
50min;
C. in the case where revolving speed is the stirring rate of 160rpm, by the alkaline potassium borohydride aqueous solution of above-mentioned preparation with 0.5mL/s
Titration speed be added drop-wise in reactor, after being added dropwise, switch to stir 10min under 250rpm;
D. after, it is filtered processing, 5 washings are carried out using product of the deionized water to generation, after washing, are put
Enter in vacuum oven, be dried in vacuo 7h at vacuum degree 133Pa, 75 DEG C of temperature, that is, be prepared average grain diameter 50~
Cu particle within the scope of 100nm;
(2) first 30g methyl vinyl silicon kautschuk and the Cu particle of above-mentioned preparation are kneaded in torque rheometer
It is even, it is heat-treated 40min at a temperature of 150 DEG C, is cooled to room temperature, uniform mixed system is prepared;
(3) mixed system of above-mentioned preparation is added to equipped with the anti-of agitating device, heating device and nitrogen protection device
It answers in device, is passed through nitrogen protection, in the case where revolving speed is the stirring rate of 150rpm, by 30g tetramethyl-ring tetrasiloxane, 15g allyl
Base glycidol ether, 0.5g chloroplatinic acid catalyst and 8g polymethyl methacrylate (PMMA) sequentially add in above-mentioned reactor,
Switch to stir under 250rpm;
Later, 0.5h is reacted at being 20 DEG C in temperature, 60 DEG C is warming up to the rate of 2 DEG C/min and reacts 1.5h, then with 2
DEG C/rate of min is warming up to 100 DEG C and reacts 1~3h, reaction mixture is at 140 DEG C of temperature, pressure 4kPa, vacuum distillation
It is steamed to no low-boiling-point substance, thick liquid is prepared;
(4) the above-mentioned thick liquid prepared is coated uniformly on and is with a thickness of 0.3mm, width 100mm, length
The central part of 1 one side surface of stainless steel foil of 100mm, stainless steel foil 1 is put into vacuum oven, in vacuum degree 133Pa,
It is dried in vacuo 2h under temperature 70 C, Cu base elasticity adhesion layer 2 is prepared;
(5) the Cu base elasticity adhesion layer 2 of above-mentioned preparation is tested for the property, volume resistivity be 1.38 Ω cm,
The peel strength that peel strength between stainless steel foil is 154N/cm between fexible film (PI) is 139N/cm, rebound
Rate is 83%.
Embodiment three:
(1) preparation of Cu particle of the average grain diameter within the scope of 50~100nm:
A. 13g potassium borohydride (KBH is first weighed4) be dissolved in 250mL deionized water, then 0.1g sodium hydrate particle is added
Enter in above-mentioned potassium borohydride aqueous solution, adjust PH to 12, preparation obtains alkaline potassium borohydride aqueous solution;
B. the mixed solvent being first made of 300mL deionized water and 200mL dehydrated alcohol, is added to equipped with titration outfit
In the reactor of magnetic stirring apparatus, in the case where revolving speed is the stirring rate of 180rpm, first by 25g cupric sulfate pentahydrate (CuSO4·
5H2O it) is added in reactor, then 1.5g polyvinylpyrrolidine copper (PVP) is added in reactor, later, switch to stir under 500rpm
Mix 60min;
C. in the case where revolving speed is the stirring rate of 180rpm, by the alkaline potassium borohydride aqueous solution of above-mentioned preparation with 0.5mL/s
Titration speed be added drop-wise in reactor, after being added dropwise, switch to stir 10min under 300rpm;
D. after, it is filtered processing, 6 washings are carried out using product of the deionized water to generation, after washing, are put
Enter in vacuum oven, be dried in vacuo 8h at vacuum degree 133Pa, 80 DEG C of temperature, that is, be prepared average grain diameter 50~
Cu particle within the scope of 100nm;
(2) first 40g methyl vinyl silicon kautschuk and the Cu particle of above-mentioned preparation are kneaded in torque rheometer
It is even, it is heat-treated 60min at a temperature of 170 DEG C, is cooled to room temperature, uniform mixed system is prepared;
(3) mixed system of above-mentioned preparation is added to equipped with the anti-of agitating device, heating device and nitrogen protection device
It answers in device, is passed through nitrogen protection, in the case where revolving speed is the stirring rate of 180rpm, by 35g tetramethyl-ring tetrasiloxane, 20g allyl
Base glycidol ether, 0.5g chloroplatinic acid catalyst and 10g polymethyl methacrylate (PMMA) sequentially add in above-mentioned reactor,
Switch to stir under 300rpm;
Later, 0.5h is reacted at being 20 DEG C in temperature, 70 DEG C is warming up to the rate of 2 DEG C/min and reacts 2h, then with 2
DEG C/rate of min is warming up to 120 DEG C and reacts 3h, reaction mixture is at 150 DEG C of temperature, pressure 4kPa, vacuum distillation to nothing
Low-boiling-point substance steams, and thick liquid is prepared;
(4) the above-mentioned thick liquid prepared is coated uniformly on and is with a thickness of 0.3mm, width 100mm, length
The central part of 1 one side surface of stainless steel foil of 100mm, stainless steel foil 1 is put into vacuum oven, in vacuum degree 133Pa,
It is dried in vacuo 3h at 80 DEG C of temperature, Cu base elasticity adhesion layer 2 is prepared;
(5) the Cu base elasticity adhesion layer 2 of above-mentioned preparation is tested for the property, volume resistivity be 1.46 Ω cm,
The peel strength that peel strength between stainless steel foil is 149N/cm between fexible film (PI) is 137N/cm, rebound
Rate is 85%.