A kind of method preparing cigs solaode
Technical field
The present invention relates to the preparation method of cigs solaode.
Background technology
In recent years, photovoltaic industry assumes the trend of accelerated development, and the feature of development is: yield increases, and transformation efficiency improves,
Cost reduces, and application constantly expands.Compared with before 10 years, solaode price is greatly lowered.It is contemplated that with
The progress of technology and the expansion in market, light cell cost and price will decline to a great extent.After 2010, due to solaode
The decline of cost is it is expected to make photovoltaic technology enter extensive development period.With the progress of technology, the sending out of thin-film solar cells
Exhibition will be maked rapid progress, and will step up in the market share of following photovoltaic market.As the best thin-film solar cells of performance,
Cigs thin-film solar cells also will welcome fast-developing period.Existing cigs (CIGS) solaode includes base
Plate, has several layer films in substrate surface deposition.The cigs thin-film solar cells that prior art produces are due to the process control time
Longer, its production efficiency is not high, and quality of forming film is not high.
Wherein, the most key is cigs absorbed layer, and it is the core of solaode, the preparation method of absorbed layer
Steam selenizing method after method and magnetron sputtering as polynary altogether.Method of steaming altogether respectively has different fusing points due to the element different using four kinds,
Make to control formation on large substrate for the stoichiometric compound to be highly difficult.At present, market has one kind by splashing
Penetrate the method that method directly prepares absorbed layer and cushion, the method that it adopts is so that substrate circumference is run, and passes through to splash outside circumference
The method of penetrating makes to be formed absorbed layer and cushion on substrate.This method sputters due to using level, due to the effect of gravity, its
On substrate, the absorbed layer of deposition and cushion are not uniform, the quality of impact battery.
Content of the invention
For above-mentioned technical problem, a kind of production efficiency of present invention offer is higher, quality of forming film preferable cigs solar energy
The preparation method of battery.
The present invention solves above-mentioned technical problem and the technical scheme is that a kind of method preparing cigs solaode,
It comprises the following steps:
(1) sputter molybdenum electrode layer on substrate;
(2) substrate with molybdenum electrode layer is placed in vacuum interior, and positive promotion substrate, on substrate, sputter cigs inhales
Receive layer;
(3) substrate, sputter cds cushion on absorbed layer are reversely promoted;
(4) will there is the substrate of cushion from vacuum interior taking-up, and plate zno conductive oxide layer on the buffer layer;
(5) azo layer is plated on conductive oxide layer;
(6) cutting encapsulation.
Preferably, described substrate is using alkaline soda-lime glass.
Preferably, described molybdenum electrode layer surface is in fish scale-shaped, thickness is 0.5--1.5 μm.
Preferably, being provided with absorption layer target material, cushion target and and target in indoor being located on the upside of substrate of described vacuum
The corresponding sputtering source of material, sputtering source passes through to bombard two targets respectively, sputter absorbed layer and cushion on substrate.
Preferably, described absorption layer target material and cushion target are arranged on same rotary body, a rotating body is provided with
Sputtering source, switches absorption layer target material and cushion target by rotating rotary body.
Preferably, described absorption layer target material is formed by the compacting of cigs powder.
Preferably, by cucl2、incl3、gacl3、na2Described cigs powder is synthesized in se addition ethylenediamine.
Preferably, the thickness of described absorbed layer is 1.5--2.0 μm, the thickness of cushion is 0.05 μm.
Preferably, described conductive oxide layer adopts magnetic control sputtering plating method to prepare, its thickness is 0.05 μm.
Preferably, azo thickness degree is 0.5--1.5 μm.
The present invention compared with prior art has the advantage that
1st, the present invention passes through positive mobile, the sputter absorbed layer of substrate;Substrate moves backward, and sputter cushion not only carries
High production efficiency, and save space, reduce production cost.
2nd, the effective control of the present invention sputter of cigs absorbed layer, and the precise control thickness of each layer, the product of production
Quality is good.
3rd, using single target sputtering method sputter absorbed layer from top to bottom and cushion, it is to avoid because the impact of gravity makes to sink
Long-pending not uniform phenomenon, further increases product quality.
Specific embodiment
The present invention be described in detail below:
The method comprise the steps that sputter molybdenum electrode layer on substrate;Substrate is contained using alkaline soda-lime glass, this glass
There is metal sodium ion, the absorbed layer of battery can be entered by diffusion, contribute to the growth of thin film crystal grain;Described molybdenum electrode layer table
Face is in fish scale-shaped, and to increase the contact area between levels, thus increasing adhesive force, and molybdenum electrode thickness degree should control
0.5--1.5μm.
The substrate with molybdenum electrode layer is placed in vacuum interior, and positive promotion substrate, on substrate, sputter cigs absorbs
Layer;Reversely promote substrate, sputter cds cushion on absorbed layer;When preparing absorption layer target material, first by cucl2、incl3、
gacl3、na2Se adds stirring in ethylenediamine, and ethylenediamine can absorb the waste heat that synthetic reaction is discharged, and can increase forerunner
Salt dissolubility in a solvent, so that reaction is more complete;Reacted by above-claimed cpd, thus synthesizing cigs powder,
And the particle diameter of cigs is more uniform;Then powder is pressed into absorption layer target material, this mode can make the consistency of target up to
More than 90%.The cushion target of the present invention adopts existing cds target.In process of production, by above-mentioned two targets and corresponding
Sputtering source is placed in the vacuum interior of heating so that sputtering is carried out in a vacuum, and is heated by heater, and it is suitable to maintain
Temperature conditionss;Sputtering source adopts the noble gases of plasma, such as makes argon produce plasma electrical body by ionization device;Sputtering
Source is passed through to bombard target, makes corresponding component deposition on substrate.
In the present invention, on the downside of two targets, workbench is set, the substrate containing molybdenum electrode layer can be along movable workbench;Work
Platform supporting substrate, can make substrate along the forward and reverse movement of workbench by existing apparatus such as rollers simultaneously;Substrate is positive along workbench
When mobile, absorption layer target material is located at directly over substrate, and sputtering source bombards absorption layer target material from top to bottom, makes deposition on molybdenum electrode layer
Absorbed layer;After the completion of absorbed layer deposition, substrate moves backward along workbench, now absorption layer target material should be switched to cushion target
Material, making cushion target be located at directly over substrate, thus bombarding cushion target from top to bottom by sputtering source, making on absorbed layer
Buffer layer.Due to using sputtering method deposit absorbent layer from top to bottom and cushion, it is to avoid because the impact of gravity makes
The not uniform phenomenon of deposition, not only can continuously prepare absorbed layer and cushion, production efficiency is high;And quality of forming film is high.With
When, the thickness of absorbed layer should control at 1.5--2.0 μm, and buffer layer thickness should control at 0.05 μm about.
To there is the substrate of cushion from vacuum interior taking-up, and plate zno conductive oxide layer on the buffer layer;Conductive oxygen
Changing layer adopts magnetic control sputtering plating method to prepare, and its THICKNESS CONTROL is at 0.05 μm about;Again azo layer is plated on conductive oxide layer, it is thick
Degree controls at 0.5--1.5 μm;Then carry out cutting encapsulation.As the Top electrode of battery, it has low sheet resistance to azo, good
Visible light transmissivity, with al electrode constitute Ohmic contact.
Above-mentioned embodiment is used for illustrative purposes only, and is not limitation of the present invention, relevant technical field
Those of ordinary skill, without departing from the spirit and scope of the present invention, acceptable various changes can be made and modification, therefore institute
There is equivalent technical scheme also should belong to scope of the invention.