CN203573991U - Multi-junction multi-lamination-layer silicon-based film solar cell - Google Patents
Multi-junction multi-lamination-layer silicon-based film solar cell Download PDFInfo
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- CN203573991U CN203573991U CN201320738965.1U CN201320738965U CN203573991U CN 203573991 U CN203573991 U CN 203573991U CN 201320738965 U CN201320738965 U CN 201320738965U CN 203573991 U CN203573991 U CN 203573991U
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title abstract description 13
- 229910052710 silicon Inorganic materials 0.000 title abstract description 13
- 239000010703 silicon Substances 0.000 title abstract description 13
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 108
- 238000003475 lamination Methods 0.000 claims abstract description 29
- 229910021417 amorphous silicon Inorganic materials 0.000 claims abstract description 11
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910021419 crystalline silicon Inorganic materials 0.000 claims description 68
- 239000000758 substrate Substances 0.000 claims description 25
- 239000011248 coating agent Substances 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 18
- 239000004065 semiconductor Substances 0.000 claims description 10
- 210000001142 back Anatomy 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 14
- 230000031700 light absorption Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 51
- 239000010408 film Substances 0.000 description 45
- 238000000151 deposition Methods 0.000 description 41
- 239000007789 gas Substances 0.000 description 40
- 230000008021 deposition Effects 0.000 description 34
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 34
- 239000011521 glass Substances 0.000 description 17
- 238000005984 hydrogenation reaction Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 8
- 238000005240 physical vapour deposition Methods 0.000 description 8
- 239000010409 thin film Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000007792 gaseous phase Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 229910021424 microcrystalline silicon Inorganic materials 0.000 description 3
- 241000446313 Lamella Species 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000008367 deionised water Substances 0.000 description 2
- 229910021641 deionized water Inorganic materials 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 229910000085 borane Inorganic materials 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910014558 c-SiO Inorganic materials 0.000 description 1
- 239000002800 charge carrier Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- UORVGPXVDQYIDP-UHFFFAOYSA-N trihydridoboron Substances B UORVGPXVDQYIDP-UHFFFAOYSA-N 0.000 description 1
Images
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/548—Amorphous silicon PV cells
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Abstract
The utility model provides a multi-junction multi-lamination-layer silicon-based film solar cell. The multi-junction multi-lamination-layer silicon-based film solar cell is sequentially provided with a p-A-SiC contact layer, a p-A-SiC window layer, a p-A-SiC buffer layer and a lamination layer i-A-SiC on a TCO front electrode layer. The multi-junction multi-lamination-layer silicon-based film solar cell employs the wide band gap contact layer to reduces interface resistance with the TCO front electrode, improves capability of the cell in absorbing short wavelength blue light through the wide band gap window layer, employs the wide band gap buffer layer to reduce interface rampart, reduces series resistance and light absorption loss of the cell, further employs a lamination layer structure in an amorphous silicon carbide intrinsic layer and employs gradient type doping to form the amorphous silicon carbide intrinsic layer having gradient band gap width, and thereby short circuit current density and photoelectric conversion efficiency of the cell are improved.
Description
Technical field
The utility model belongs to area of solar cell, relates to a kind of many many laminated silicon-base films of knot solar cells, can conveniently be applied in the manufacturing technology of silicon-based film solar cells of extensive industrialization.
Background technology
Silicon-based thin film solar cell because of its raw material reserves abundant, pollution-free, preparation technology is simple, be convenient to the advantages such as large area serialization production, be subject to domestic and international expert's extensive concern, wherein amorphous silicon/microcrystalline silicon solar cell is the most frequently used lamination solar cell, but just at present, still there are many restrictions in laminated cell, as for p-type and N-shaped amorphous silicon and microcrystalline silicon film material, due to the unordered and high defect state density of structure and high doping, the diffusion length of charge carrier is very short, therefore need between p/n layer, add i layer structure, enough light absorption so both can have been guaranteed, enough internal electric fields can be provided again simultaneously.But interface problem is brought in the introducing of i layer equally into, because p layer is different with the band gap width of i layer, between p/i, exist boundary defect and barrier, cause photo-generated carrier effectively not collected.For deposited in single chamber, because pin layer deposits at same chamber, intrinsic i layer is easily subject to foreign atom and pollutes, and causes intrinsic layer and interfacial characteristics variation.Meanwhile, because electrode before p layer and tco layer will form good ohmic contact, play the effect that builds electric field.Therefore, the application designs the contact layer of high conductivity, the Window layer of broad-band gap and resilient coating, and the noncrystalline silicon carbide intrinsic layer with gradient band gap width is to meet characteristic needs.Patent 101866963A discloses the silica-based many knot multi-laminate PIN thin-film solar cells of a kind of high conversion and manufacture method thereof, and this patent is incorporated herein by reference.
Utility model content
The utility model is mainly for the deficiency in existing technology, and for example Window layer conductivity is lower, and transformation efficiency is low, and proposes a kind of new battery structure, and this battery, by adopting broad-band gap p-A-SiC contact layer, can promote the conductivity of battery; Adopt broad-band gap p-A-SiC Window layer, can promote the absorption of top battery to short wavelength's blue light; Adopt broad-band gap p-A-SiC resilient coating to reduce interface barrier, reduce series resistance and the optical absorption loss of battery, improve the collection efficiency of photo-generated carrier, the impact of the unnecessary boron element of elimination doping simultaneously on intrinsic layer; By employing, have the lamination i-A-SiC layer of gradient band gap width, the utilization ratio that increases solar spectrum with this, improves light absorption.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of many many laminated silicon-base films of knot solar cells, comprise successively substrate layer, the front electrode layer of TCO, n-A-SiC layer, at least two middle reflector, PIN layer, TCO dorsum electrode layer and back reflection films from top to bottom, between every adjacent two middle reflector, be provided with a PIN layer; It is characterized in that before TCO, between electrode layer and n-A-SiC layer, having successively p-A-SiC contact layer, p-A-SiC Window layer, p-A-SiC resilient coating and lamination i-A-SiC intrinsic layer, and before p-A-SiC contact layer and TCO, electrode layer is adjacent.
Described p-A-SiC contact layer is preferably p-type amorphous silicon carbide layer, and described p-A-SiC contact layer thickness is preferably: 2nm～10nm.
Described p-A-SiC Window layer is preferably p-type amorphous silicon carbide layer, and described p-A-SiC Window layer thickness is preferably: 2nm～10nm.
Described p-A-SiC resilient coating is preferably p-type amorphous silicon carbide layer, and described p-A-SiC buffer layer thickness is preferably: 5nm～15nm.
Described lamination i-A-SiC intrinsic layer quantity is preferably 1～3 layer, and described lamination i-A-SiC intrinsic layer thickness is preferably: 100nm～300nm.
Described middle reflector is preferably n-SiO
xlayer or SiN
xlayer; Described middle reflector thickness is preferably: 10nm～100nm.
Described PIN layer is preferably selected from one of following several structures: p-μ c-SiC layer/i-μ c-SiC layer/n-μ c-SiC layer, p-A-Si layer/i-A-Si layer/n-A-Si layer, p-A-Si
1-xge
xlayer/i-A-Si
1-xge
xlayer/n-A-Si
1-xge
xlayer, p-μ c-Si layer/i-μ c-Si layer/n-μ c-Si layer, p-μ c-Si
1-xge
xlayer/i-μ c-Si
1-xge
xlayer/n-μ c-Si
1-xge
xlayer; Wherein, n-represents electron type (N-shaped) semiconductor, and i-represents intrinsic semiconductor, and p-represents cavity type (p-type) semiconductor; 0 < x < 1; "/" represents the interface between two-layer.
Much more a kind of many laminated silicon-base films of knot solar cells, this battery structure is more preferably following one of all kinds of:
(1) reflector/p-A-Si in the middle of reflector/p-A-Si/i-A-Si/n-A-Si/ in the middle of electrode layer/p-A-SiC contact layer/p-A-SiC Window layer/p-A-SiC resilient coating/lamination i-A-SiC/n-A-SiC layer before substrate layer/TCO/middle reflector/p-μ c-SiC/i-μ c-SiC/n-μ c-SiC/
1-xge
x/ i-A-Si
1-xge
x/ n-A-Si
1-xge
xreflector/p-μ c-Si in the middle of/middle reflector/p-μ c-Si/i-μ c-Si/n-μ c-Si/
1-xge
x/ i-μ c-Si
1-xge
x/ n-μ c-Si
1-xge
x/ TCO dorsum electrode layer/back reflection film;
(2) the middle reflector/p-A-Si of electrode layer/p-A-SiC contact layer/p-A-SiC Window layer/p-A-SiC resilient coating/lamination i-A-SiC/n-A-SiC layer/middle reflector/p-A-Si/i-A-Si/n-A-Si/ before substrate layer/TCO
1-xge
x/ i-A-Si
1-xge
x/ n-A-Si
1-xge
xreflector/p-μ c-Si in the middle of/middle reflector/p-μ c-Si/i-μ c-Si/n-μ c-Si/
1-xge
x/ i-μ c-Si
1-xge
x/ n-μ c-Si
1-xge
x//TCO dorsum electrode layer/back reflection film;
(3) electrode layer/p-A-SiC contact layer/p-A-SiC Window layer/p-A-SiC resilient coating/lamination i-A-SiC/n-A-SiC layer/middle reflector/p-A-Si before substrate layer/TCO
1-xge
x/ i-A-Si
1-xge
x/ n-A-Si
1-xge
xreflector/p-μ c-Si in the middle of/middle reflector/p-μ c-Si/i-μ c-Si/n-μ c-Si/
1-xge
x/ i-μ c-Si
1-xge
x/ n-μ c-Si
1-xge
x/ TCO dorsum electrode layer/back reflection film;
(4) reflector/p-μ c-Si in the middle of electrode layer/p-A-SiC contact layer/p-A-SiC Window layer/p-A-SiC resilient coating/lamination i-A-SiC/n-A-SiC layer before substrate layer/TCO/middle reflector/p-μ c-Si/i-μ c-Si/n-μ c-Si/
1-xge
x/ i-μ c-Si
1-xge
x/ n-μ c-Si
1-xge
x/ TCO dorsum electrode layer/back reflection film;
Wherein, described p layer, i layer, n layer are all selected from c-Si
1-xge
x, A-Si
1-xge
x, c-SiC, A-SiC, c-Si, A-Si, A-SiO
x, μ c-Si, μ c-SiC, μ c-SiO
x, μ c-Si
1-xge
xone in semi-conducting material, n-represents electron type (N-shaped) semiconductor, and i-represents intrinsic semiconductor, and p-represents cavity type (p-type) semiconductor; 0 < x < 1; "/" represents the interface between two-layer; Substrate layer is glass, stainless steel or macromolecular material.A represents amorphous, and μ c represents crystallite.
Described contact layer adopts SiH
4/ H
2volumetric flow of gas is than the mist that is 0.5～5.0, by doping CH
4with TMB(trimethyl borine), and using plasma strengthens chemical gaseous phase depositing process (PECVD) formation, wherein CH
4/ SiH
4volumetric flow of gas ratio is that 0.01～3.0, TMB/SiH4 volumetric flow of gas ratio is 0.01～2.0, and the pressure of reative cell gas is 0.3mbar～1.0mbar, and radio frequency power density is 10mW/cm
2～350mW/cm
2, band gap width is 2.1eV～2.3eV.
Described Window layer adopts SiH
4/ H
2volumetric flow of gas is than the mist that is 0.05～5.0, by doping CH
4and TMB, and using plasma strengthens chemical gaseous phase depositing process formation, wherein CH
4/ SiH
4volumetric flow of gas ratio is 0.02～3.0, TMB/SiH
4volumetric flow of gas ratio is 0.01～3.0, and the reacting gas pressure of reative cell is 0.3mbar～3.0mbar, and radio frequency power density is 10mW/cm
2～350mW/cm
2, band gap width is 2.0eV～2.1eV.
Described resilient coating adopts SiH
4/ H
2volumetric flow of gas is than the mist that is 0.02～5.0, by doping CH
4, and using plasma strengthens chemical gaseous phase depositing process formation, wherein CH
4/ SiH
4volume ratio is 0.1～2.0, and described buffer layer deposition pressure is at 1.0mbar～3.0mbar, and band gap width is 1.8eV～2.0eV.
Described lamination i-A-SiC intrinsic layer using plasma strengthens chemical gaseous phase depositing process and forms, hydrogen thinner ratio SiH
4/ H
2be 0.2～5, the reacting gas pressure of reative cell is 0.3mbar～2.0mbar, and band gap width is 1.8eV～2.1eV.
Described middle reflector is preferably n-SiO
xor SiN
x; Wherein n-SiO
xpreparation technology be: using plasma strengthen chemical gaseous phase depositing process, wherein SiH
4/ H
2volumetric flow of gas ratio is 0.01～0.5, CO
2/ SiH
4volumetric flow of gas ratio is 0.5～3.5, (0.5%PH
3/ H
2)/SiH
4volume flow ratio is 0.01-0.5; Operation pressure is 1.0mbar～5.0mbar, and radio frequency power density is 10mW/cm
2～350mW/cm
2; Described middle reflector thickness is preferably: 10nm～100nm.Wherein 0.5%PH
3/ H
2represent PH
3with H
2mist, and PH wherein
3volume fraction is 0.5%.
Described many many laminated silicon-base films of knot solar cells, preferably:
Described p-A-SiC contact layer thickness is: 2nm～10nm;
Described p-A-SiC Window layer thickness is: 2nm～10nm;
Described p-A-SiC buffer layer thickness is: 5nm～15nm;
Described lamination i-A-SiC intrinsic layer thickness is: 100nm～300nm;
Described middle reflector thickness is: 10nm～100nm.
The manufacturing process of described many many laminated silicon-base films of knot solar cells, comprises the following steps:
(1) glass substrate is cleaned;
(2) on substrate, prepare electrode before TCO;
(3) adopt 355nm long wavelength laser electrode before TCO to be cut apart to the electrode that forms sub-battery;
(4) glass substrate after scribing is cleaned again;
(5), on the glass-based lamella with conducting film, using plasma strengthens chemical vapor deposition method and prepares amorphous and microcrystalline silicon film; Specifically comprise; P-A-SiC contact layer deposition, p-A-SiC Window layer deposition, p-A-SiC buffer layer deposition and lamination i-A-SiC intrinsic layer deposition;
Described p-A-SiC contact layer deposition, related process parameter is:
150 ℃～300 ℃ of underlayer temperatures, SiH
4/ H
2volumetric flow of gas ratio is 0.5～5.0, CH
4/ SiH
4volumetric flow of gas ratio is 0.02～3.0, TMB/SiH
4volumetric flow of gas ratio is 0.01～2.0, and reaction chamber air pressure is 0.3mbar～1.0mbar, and radio frequency power density is 10mW/cm
2～350mW/cm
2; Described p-A-SiC contact layer thickness is: 2nm～10nm;
Described p-A-SiC Window layer deposition, related process parameter is:
150 ℃～300 ℃ of underlayer temperatures, SiH
4/ H
2volumetric flow of gas ratio is 0.05～5.0, CH
4/ SiH
4volumetric flow of gas ratio is 0.02～3.0, TMB/SiH
4volumetric flow of gas ratio is 0.01～3.0, and reaction chamber air pressure is 0.3mbar～3.0mbar, and radio frequency power density is 10mW/cm
2～350mW/cm
2; Described p-A-SiC Window layer thickness is: 2nm～10nm;
Described p-A-SiC buffer layer deposition, related process parameter is:
150 ℃～300 ℃ of underlayer temperatures, SiH
4/ H
2volumetric flow of gas ratio is 0.02～5.0, CH
4/ SiH
4volume ratio is 0.1～2.0, and reaction chamber air pressure is 1.0mbar～3.0mbar, and radio frequency power density is 10mW/cm
2～350mW/cm
2; Described p-A-SiC buffer layer thickness is: 5nm～15nm;
Described lamination i-A-SiC intrinsic layer deposition, related process parameter is:
150 ℃～300 ℃ of underlayer temperatures, lamination quantity is 1～3 layer, lamination gross thickness is 100～300nm, hydrogen thinner ratio SiH
4/ H
2be 0.2～5, reaction chamber air pressure is 0.3mbar～2.0mbar, and radio frequency power density is 10mW/cm
2～350mW/cm
2; Described lamination i-A-SiC intrinsic layer thickness is: 100nm～300nm;
(6) adopt the glass-based lamella after 532nm long wavelength laser scribing plated film, be convenient to TCO back electrode as wire connexon battery;
(7) prepare TCO back electrode;
(8) adopt 532nm long wavelength laser scribing silica-base film and TCO back electrode, form single sub-battery;
(9) battery edge is carried out to laser scribing;
(10) battery is carried out to circuit connection and encapsulation.
The prepared p-A-SiC contact layer of the utility model, p-A-SiC Window layer, the performance of p-A-SiC resilient coating and i-A-SiC intrinsic layer film is as shown in table 1:
Table 1 p-A-SiC and i-A-SiC film performance
Compared with prior art, advantage of the present utility model is:
1, the utility model formation contact layer makes to form good ohmic contact between Window layer and front electrode, increases electric conductivity; Form Window layer and can effectively strengthen the absorption to short-wave band light, reduce the absorption of Window layer to long-wave band light, improve the absorption efficiency of intrinsic layer; Form resilient coating and can effectively cushion the barrier height between p layer and intrinsic layer, reduce the transition of band edge energy level, can also stop the pollution of residue B element impurity to intrinsic layer in chamber simultaneously.
2, the utility model can effectively improve the absorption efficiency of lamination solar cell and the collection efficiency of photo-generated carrier, improve the front electrode of p/TCO, interface performance between p/i layer, reduce the contaminating impurity of intrinsic layer, improve short-circuit current density and the electricity conversion of battery, the conversion efficiency of many many laminated silicon-base films of knot solar cells of the present utility model is expected to reach 19%, can be applicable to preparation and the industrial production in enormous quantities of bulk silicon based thin film solar cell.
Accompanying drawing explanation
Fig. 1 is the structural representation of many laminated silicon-base films of the knot of three in the utility model embodiment solar cell;
Fig. 2 is the structural representation of another kind of four many laminated silicon-base films of knot solar cells in the utility model embodiment;
Fig. 3 is a kind of I-V curve chart of many laminated silicon-base films of binode solar cell; This figure illustrates employing contact layer, Window layer, and many laminated silicon-base films of binode solar cell of resilient coating and lamination intrinsic layer technological parameter, institute's power of battery that obtains and conversion efficiency are all higher.
Embodiment
Below in conjunction with embodiment, the utility model is described further.
(1) reflector/p-μ c-Si in the middle of electrode layer/p-A-SiC contact layer/p-A-SiC Window layer/p-A-SiC resilient coating/lamination i-A-SiC/n-A-SiC layer before battery structure: substrate layer/TCO/middle reflector/p-μ c-Si/i-μ c-Si/n-μ c-Si/
1-xge
x/ i-μ c-Si
1-xge
x/ n-μ c-Si
1-xge
x/ TCO dorsum electrode layer/back reflection film;
(2) preparation technology:
1. cleaning glass substrate, adopts industrial washer and high temperature alkaline solution to clean, and recycles deionized water and clean also air-dry after completing.
2. on the glass substrate after cleaning, adopt the front electrode of B doping ZnO of 1500～1800nm deposited by physical vapour deposition (PVD).
3. adopt 355nm long wavelength laser that electrode before TCO is cut apart to form the electrode of sub-battery.
4. pair for the first time the glass substrate after laser scribing cleans.
5. before depositing silicon base film, glass substrate is carried out to 250 ℃ of the pre-heat treatment 12 minutes.
6. with the Amorphous GaN film contact layer of PECVD method deposition p-type carbon (C) doping, and by PECVD method hydrogenation treatment.Technical parameter is: SiH
4/ H
2gas flow ratio is 0.5～5.0, TMB/SiH
4gas flow ratio is 0.01～2.0, CH
4/ SiH
4gas flow ratio is 0.02～3.0, and reaction chamber air pressure is 0.3～1.0mbar, and radio frequency power density is 10～350mW/cm
2.
7. with the Amorphous GaN film window layer of PECVD method deposition p-type carbon (C) doping, and by PECVD method hydrogenation treatment.Technical parameter is: SiH
4/ H
2gas flow ratio is 0.05～5.0, TMB/SiH
4gas flow ratio is 0.01～3.0, CH
4/ SiH
4gas flow ratio is 0.02～3.0, and reaction chamber air pressure is 0.3～3.0mbar, and radio frequency power density is 10～350mW/cm
2.
8. by PECVD method, in Window layer, deposit the Amorphous GaN film resilient coating of p-type carbon (C) doping, and by PECVD method hydrogenation treatment.Technical parameter is: SiH
4/ H
2gas flow ratio is 0.02～5.0, CH
4/ SiH
4volume ratio is 0.1～2.0, and buffer layer deposition pressure is at 1.0～3.0mbar, and radio frequency power density is 10～350mW/cm
2.
9. with PECVD method deposition lamination i-A-SiC film, wherein rete sum can be 1～3 layer, and technical parameter is: lamination gross thickness is 100～300nm, hydrogen thinner ratio SiH
4/ H
2be 0.2～5, the reacting gas pressure of reative cell is 0.3～2.0mbar.
10. with PECVD method deposition n-A-SiC rete, and by PECVD method hydrogenation treatment.
Reflector n-SiO in the middle of 11. use PECVD method depositions
xor SiN
x, and by PECVD method hydrogenation treatment.Technical parameter is: SiH
4/ H
2gas flow ratio is 0.01～0.5, CO
2/ SiH
4gas flow ratio is 0.5～3.5, (0.5%PH
3/ H
2)/SiH
4flow-rate ratio is 0.01～0.5; Process atmospheric pressures is 1.0mbar～5.0mbar, and radio frequency power density is 10～350mW/cm
2.
The sub-battery of 12. use PECVD method deposition μ c-Si, completes respectively p-μ c-Si layer, i-μ c-Si layer and n-μ c-Si layer film, and deposition time substrate temperature is controlled at 160 ℃.
Reflector n-SiO in the middle of 13. use PECVD method depositions
xor SiN
x, and by PECVD method hydrogenation treatment.
14. use PECVD method deposition μ c-Si
1-xge
xsub-battery, completes respectively p-μ c-Si
1-xge
xlayer, i-μ c-Si
1-xge
xlayer and n-μ c-Si
1-xge
xlayer film, deposition time substrate temperature is controlled at 160 ℃.
15. use 532nm long wavelength lasers remove silicon thin film part to sub-battery is connected.
16. use, 1500～1800nm B deposited by physical vapour deposition (PVD) doping ZnO back electrode.
17. use 532nm long wavelength lasers remove silicon thin film and TCO back electrode to form single sub-battery.
18. complete after above technique, then carry out the clear limit of laser technique the 4th time.
19. finally carry out electrode connecting line, and with EVA as back reflection film and encapsulating material, in conjunction with back-panel glass, encapsulated together whole battery.
(1) electrode layer/p-A-SiC contact layer/p-A-SiC Window layer/p-A-SiC resilient coating/lamination i-A-SiC/n-A-SiC layer/middle reflector/p-A-Si before battery structure: substrate layer/TCO
1-xge
x/ i-A-Si
1-xge
x/ n-A-Si
1-xg
exreflector/p-μ c-Si in the middle of/middle reflector/p-μ c-Si/i-μ c-Si/n-μ c-Si/
1-xge
x/ i-μ c-Si
1-xge
x/ n-μ c-Si
1-xge
x/ TCO dorsum electrode layer/back reflection film;
(2) preparation technology:
1. cleaning glass substrate, adopts industrial washer and high temperature alkaline solution to clean, and recycles deionized water and clean also air-dry after completing.
2. on the glass substrate after cleaning, adopt the front electrode of B doping ZnO of 1500～1800nm deposited by physical vapour deposition (PVD).
3. adopt 355nm long wavelength laser that electrode before TCO is cut apart to form the electrode of sub-battery.
4. pair for the first time the glass substrate after laser scribing cleans.
5. before depositing silicon base film, glass substrate is carried out to 250 ℃ of the pre-heat treatment 12 minutes.
6. with the Amorphous GaN film contact layer of PECVD method deposition p-type carbon (C) doping, and by PECVD method hydrogenation treatment.Technical parameter is: SiH
4/ H
2gas flow ratio is 0.5～5.0, TMB/SiH
4gas flow ratio is 0.01～2.0, CH
4/ SiH
4gas flow ratio is 0.02～3.0.Reaction chamber air pressure is 0.3～1.0mbar, and radio frequency power density is 10～350mW/cm
2.
7. with the Amorphous GaN film window layer of PECVD method deposition p-type carbon (C) doping, and by PECVD method hydrogenation treatment.Technical parameter is: SiH
4/ H
2gas flow ratio is 0.05～5.0, TMB/SiH
4gas flow ratio is 0.01～3.0, CH
4/ SiH
4gas flow ratio is 0.02～3.0, and reaction chamber air pressure is 0.3～3.0mbar, and radio frequency power density is 0.01～0.05W/cm
2.
8. by PECVD method, in Window layer, deposit the Amorphous GaN film resilient coating of p-type carbon (C) doping, and by PECVD method hydrogenation treatment.Technical parameter is: SiH
4/ H
2gas flow ratio is 0.02～5.0, CH
4/ SiH
4volume ratio is 0.1～2.0, and buffer layer deposition pressure is at 1.0～3.0mbar, and radio frequency power density is 10～350mW/cm
2.
9. with PECVD method deposition lamination i-A-SiC film, wherein rete sum can be 1～3 layer, and technical parameter is: lamination gross thickness is 100～300nm, hydrogen thinner ratio SiH
4/ H
2be 0.2～5, reaction chamber air pressure is 0.3～2.0mbar, and radio frequency power density is 10～350mW/cm
2.
10. with PECVD method deposition n-A-SiC rete, and by PECVD method hydrogenation treatment;
Reflector n-SiO in the middle of 11. use PECVD method depositions
xor SiN
x, and by PECVD method hydrogenation treatment.Technical parameter is: SiH
4/ H
2gas flow ratio is 0.01～0.5, CO
2/ SiH
4gas flow ratio is 0.5～3.5, (0.5%PH
3/ H
2)/SiH
4flow-rate ratio is 0.01～0.5; Process atmospheric pressures is 1.0mbar～5.0mbar, and radio frequency power density is 10～350mW/cm
2.
12. use PECVD method deposition A-Si
1-xge
xsub-battery, completes respectively p-A-Si
1-xge
xlayer, i-A-Si
1-xge
xlayer and n-A-Si
1-xge
xlayer film, deposition time substrate temperature is controlled at 200 ℃.
Reflector n-SiO in the middle of 13. use PECVD method depositions
xor SiN
x, and by PECVD method hydrogenation treatment.Technical parameter is: SiH
4/ H
2gas flow ratio is 0.01～0.5, CO
2/ SiH
4gas flow ratio is 0.5～3.5, (0.5%PH
3/ H
2)/SiH
4flow-rate ratio is 0.01～0.5; Process atmospheric pressures is 1.0mbar～5.0mbar, and radio frequency power density is 10～350mW/cm
2.
The sub-battery of 14. use PECVD method deposition μ c-Si, completes respectively p-μ c-Si layer, i-μ c-Si layer and n-μ c-Si layer film, and deposition time substrate temperature is controlled at 160 ℃.
Reflector n-SiO in the middle of 15. use PECVD method depositions
xor SiN
x, and by PECVD method hydrogenation treatment.
16. use PECVD method deposition μ c-Si
1-xge
xsub-battery, completes respectively p-μ c-Si
1-xge
xlayer, i-μ c-Si
1-xge
xlayer and n-μ c-Si
1-xge
xlayer film, deposition time substrate temperature is controlled at 160 ℃.
17. use 532nm long wavelength lasers remove silicon thin film part to sub-battery is connected.
18. use, 1500～1800nm B deposited by physical vapour deposition (PVD) doping ZnO back electrode.
19. use 532nm long wavelength lasers remove silicon thin film and TCO back electrode to form single sub-battery.
20. complete after above technique, then carry out the clear limit of laser technique the 4th time.
21. finally carry out electrode connecting line, and with EVA as back reflection film and encapsulating material, in conjunction with back-panel glass, encapsulated together whole battery.
Claims (7)
1. many laminated silicon-base films of knot more than kind solar cell, comprise successively substrate layer, the front electrode layer of TCO, n-A-SiC layer, at least two middle reflector, PIN layer, TCO dorsum electrode layer and back reflection films from top to bottom, between every adjacent two middle reflector, be provided with a PIN layer; It is characterized in that before TCO, between electrode layer and n-A-SiC layer, having successively p-A-SiC contact layer, p-A-SiC Window layer, p-A-SiC resilient coating and lamination i-A-SiC intrinsic layer, and before p-A-SiC contact layer and TCO, electrode layer is adjacent.
2. tie many laminated silicon-base films solar cells according to claim 1 more, it is characterized in that, described p-A-SiC contact layer is p-type amorphous silicon carbide layer, and described p-A-SiC contact layer thickness is: 2nm～10nm.
3. tie many laminated silicon-base films solar cells according to claim 1 more, it is characterized in that, described p-A-SiC Window layer is p-type amorphous silicon carbide layer, and described p-A-SiC Window layer thickness is: 2nm～10nm.
4. tie many laminated silicon-base films solar cells according to claim 1 more, it is characterized in that, described p-A-SiC resilient coating is p-type amorphous silicon carbide layer, and described p-A-SiC buffer layer thickness is: 5nm～15nm.
5. tie many laminated silicon-base films solar cells according to claim 1 more, it is characterized in that, described lamination i-A-SiC intrinsic layer quantity is 1～3 layer, and described lamination i-A-SiC intrinsic layer thickness is: 100nm～300nm.
6. tie many laminated silicon-base films solar cells according to claim 1 more, it is characterized in that, described middle reflector is n-SiO
xlayer or SiN
xlayer; Described middle reflector thickness is: 10nm～100nm.
7. tie many laminated silicon-base films solar cells according to claim 1 more, it is characterized in that, described PIN layer is selected from one of following several structures: p-μ c-SiC layer/i-μ c-SiC layer/n-μ c-SiC layer, p-A-Si layer/i-A-Si layer/n-A-Si layer, p-A-Si
1-xge
xlayer/i-A-Si
1-xge
xlayer/n-A-Si
1-xge
xlayer, p-μ c-Si layer/i-μ c-Si layer/n-μ c-Si layer, p-μ c-Si
1-xge
xlayer/i-μ c-Si
1-xge
xlayer/n-μ c-Si
1-xge
xlayer; Wherein, n-represents N-type semiconductor, and i-represents intrinsic semiconductor, and p-represents P-type semiconductor; 0 < x < 1; "/" represents the interface between two-layer.
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|---|---|---|---|---|
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