CN107154437A - The preparation method of solar battery antireflective film - Google Patents

The preparation method of solar battery antireflective film Download PDF

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Publication number
CN107154437A
CN107154437A CN201710521556.9A CN201710521556A CN107154437A CN 107154437 A CN107154437 A CN 107154437A CN 201710521556 A CN201710521556 A CN 201710521556A CN 107154437 A CN107154437 A CN 107154437A
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sih
passed
preparation
solar battery
flow
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CN201710521556.9A
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Chinese (zh)
Inventor
李跃恒
孟庆平
杨爱静
宋志成
王涛
申海超
王永冈
李绪存
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State Power Investment Corp Xian Solar Power Co Ltd
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State Power Investment Corp Xian Solar Power Co Ltd
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Priority to CN201710521556.9A priority Critical patent/CN107154437A/en
Publication of CN107154437A publication Critical patent/CN107154437A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02Details
    • H01L31/0216Coatings
    • H01L31/02161Coatings for devices characterised by at least one potential jump barrier or surface barrier
    • H01L31/02167Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells
    • H01L31/02168Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells the coatings being antireflective or having enhancing optical properties for the solar cells
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C16/00Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
    • C23C16/22Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
    • C23C16/30Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
    • C23C16/32Carbides
    • C23C16/325Silicon carbide
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/18Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
    • H01L31/1804Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof comprising only elements of Group IV of the Periodic System
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/547Monocrystalline silicon PV cells
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention discloses a kind of preparation method of solar battery antireflective film, including:The SiNx antireflective coatings of PECVD primary depositing gradually changed refractive indexes are used on the smooth surface of crystal silicon chip after the diffusion.Technical scheme technique is simple, and the damage to crystal silicon chip is small, is conducive to improving the conversion efficiency and open-circuit voltage of battery, is also beneficial to improve the uniformity of film deposition in coating process.

Description

The preparation method of solar battery antireflective film
Technical field
The present invention relates to manufacture of solar cells technology field, more particularly to a kind of solar battery antireflective film Preparation method.
Background technology
In solar cell large-scale production, increase the utilization of light frequently with the mode in silicon chip surface depositing antireflection film Rate, lifts battery conversion efficiency.Common film mainly has silicon nitride SiNx, and its film layer is usually 1-5 layers.Silicon nitride SiNx is thin Vapour deposition (PECVD, Plasma Enhanced the Chemical Vapor of many using plasma enhancing chemistry of film Deposition) prepared by the mode of deposition, with reflection preventing ability and the characteristics of body good passivation effect, but different film layers The lifting of cell conversion efficiency is then limited between silicon nitride film and with silicon substrate combination interface state height.
The content of the invention
Small, the system of the simple solar battery antireflective film of technique is damaged to silicon chip it is an object of the invention to provide a kind of Preparation Method.
To solve the above problems, the present invention provides a kind of preparation method of solar battery antireflective film:It is included in diffusion The SiNx antireflective coatings of PECVD primary depositing gradually changed refractive indexes are used on the smooth surface of crystal silicon chip afterwards.
Optionally, the SiNx antireflective coatings refractive index fades to linear gradient.
Optionally, the excursion of the SiNx antireflective coatings refractive index is [1.8,2.5].
Optionally, included using the SiNx antireflective coatings of PECVD primary depositing gradually changed refractive indexes:
It is passed through SiH4And NH3Mixed gas;
The NH being passed through is kept during PECVD3Flow it is constant, change the SiH that is passed through4Flow.
Optionally, included using the SiNx antireflective coatings of PECVD primary depositing gradually changed refractive indexes:
It is passed through SiH4And NH3Mixed gas;
The NH being passed through is kept during PECVD3Flow it is constant, reduce it is per second in the SiH that is passed through4Flow.
Optionally, it is passed through SiH4And NH3Mixed gas include:With SiH4And NH3Volume ratio be 1:3, SiH4It is initial Flow is 1500sccm, NH3Initial flow be passed through SiH for 4500sccm4And NH3Mixed gas.
Optionally, the SiH being passed through is changed4Flow include:The SiH being passed through is changed with the 1.5sccm per second that successively decreases4Flow.
Optionally, it is passed through SiH4And NH3Mixed gas include:With SiH4And NH3Volume ratio be 1:5, SiH4It is initial Flow is 1000sccm, NH3Initial flow be passed through SiH for 5000sccm4And NH3Mixed gas.
Optionally, the SiH being passed through is changed4Flow include:The SiH being passed through is changed with the 1sccm per second that successively decreases4Flow.
Optionally, the thickness of the SiNx antireflective coatings of gradually changed refractive index is between 65nm-100nm.
Compared with prior art, technical scheme has the advantages that:
The present invention is once sequentially depositing gradually changed refractive index from bottom to top using PECVD device on the smooth surface of crystal silicon chip SiNx antireflective coatings, namely the antireflective coating includes the SiNx films of different refractivity, due to that can deposit different refractivity SiNx films, therefore the film layer of antireflective coating is not limited to the SiNx films of limited film layer quantity, in addition, the refractive index of SiNx films Increase over time refractive index to be gradually reduced, the refractive index closer to layer deposition SiNx films is higher, closer to top layer deposition The refractive index of SiNx films is lower, and the passivation effect of bottom is also improved while reducing reflectivity, and then is conducive to improving electricity The conversion efficiency and open-circuit voltage in pond, are also beneficial to improve the uniformity of film deposition in coating process.In addition, by once The SiNx antireflective coatings technique of PECVD formation gradually changed refractive indexes is simple and small to the damage of crystal silicon chip.
Brief description of the drawings
Fig. 1 is the schematic diagram of antireflective coating;
Fig. 2 is the schematic diagram of the SiNx antireflective coatings of the gradually changed refractive index of the embodiment of the present invention.
Embodiment
Embodiment of the present invention provides a kind of preparation method of solar battery antireflective film, including:Crystalline substance after the diffusion The SiNx antireflective coatings of PECVD primary depositing gradually changed refractive indexes are used on the smooth surface of body silicon chip.
Technical scheme is described in further detail below in conjunction with the drawings and specific embodiments.According to following theory Bright and claims, advantages and features of the invention will become apparent from.It should be noted that, accompanying drawing is using very simplified form And non-accurately ratio is used, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
Embodiment 1
The preparation method of solar battery antireflective film comprises the following steps in the present embodiment:
(1) 156mm × 156mm crystal silicon chips are chosen, to it after making herbs into wool, diffusion, etching technics, load tubular type In PECVD.
(2) it is passed through SiH4And NH3Mixed gas, SiH4And NH3Initial volume ratio be 1:3, SiH4Initial flow be 1500sccm, NH3Initial flow be 4500sccm, depositing temperature be 480 DEG C.
(3) NH being passed through3Flow keep the gas flow of constant, to be passed through silane to successively decrease each second in coating process 1.5sccm, sedimentation time is 700 seconds.
Fig. 2 is the schematic diagram of the SiNx antireflective coatings of the gradually changed refractive index of the embodiment of the present invention, passes through the skill of the present embodiment Art scheme, obtains the film layer 3 of gradually changed refractive index as shown in Figure 2, film layer 3 include countless gradual change film layer n1, n2, n3, N4, n5, n6 etc..Fig. 1 is using existing plated film schemes generation to include film layer 1 and film in the schematic diagram of existing antireflective coating, Fig. 1 The antireflective coating of the limited film layer quantity of layer 2.The antireflective coating shown in Fig. 2 generated using the present embodiment method, reduces film The difference of refractive index between layer, and then also reduce the interfacial state of different film layers.
The SiNx antireflectives of gradually changed refractive index of the refractive index between [1.8,2.5] can be prepared by above-mentioned (1) to (3) Film, and by the gas flow of change silane linearly or nonlinearly, the folding of the SiNx antireflective coatings of deposition acquisition can be caused Penetrate the linear gradual change of rate or non-linear gradual change.
(4) solar battery sheet is prepared by silk-screen printing technique, obtained below by different coating process Open-circuit voltage Uoc, short circuit current flow Isc, fill factor, curve factor FF, the efficiency Ncell relevant parameter of solar cell.
Table 1
Technique Uoc Isc FF Ncell
Conventional antireflective coating technique 0 0 0 0
Gradual change antireflective coating technique 0.0015 0.04 0.1 0.15%
As can be seen from Table 1, Uoc, Isc of the solar cell obtained by gradual change antireflective coating technique are above routine The Uoc and Isc for the solar cell that antireflective coating technique is obtained, and its efficiency gain 0.15%, the photoelectricity of solar cell turn Efficiency is changed to significantly improve.
Embodiment 2
The preparation method of solar battery antireflective film comprises the following steps in the present embodiment:
(1) 156mm × 156mm crystal silicon chips are chosen, to it after making herbs into wool, diffusion, etching technics, load tubular type In PECVD.
(2) it is passed through SiH4And NH3Mixed gas, SiH4And NH3Initial volume ratio be 1:5, SiH4Initial flow be 1000sccm,NH3Initial flow be 5000sccm, depositing temperature be 480 DEG C.
(3) NH being passed through3Flow keep the gas flow of constant, to be passed through silane to successively decrease each second in coating process 1sccm, sedimentation time is 650 seconds.
Fig. 2 is the schematic diagram of the SiNx antireflective coatings of the gradually changed refractive index of the embodiment of the present invention, passes through the skill of the present embodiment Art scheme, obtains the film layer 3 of gradually changed refractive index as shown in Figure 2, film layer 3 include countless gradual change film layer n1, n2, n3, N4, n5, n6 etc..Fig. 1 is using existing plated film schemes generation to include film layer 1 and film in the schematic diagram of existing antireflective coating, Fig. 1 The antireflective coating of the limited film layer quantity of layer 2.The antireflective coating shown in Fig. 2 generated using the present embodiment method, reduces film The difference of refractive index between layer, and then also reduce the interfacial state of different film layers.
The SiNx antireflectives of gradually changed refractive index of the refractive index between [1.8,2.5] can be prepared by above-mentioned (1) to (3) Film, and by the gas flow of change silane linearly or nonlinearly, the folding of the SiNx antireflective coatings of deposition acquisition can be caused Penetrate that rate is linear or non-linear gradual change.
(4) solar battery sheet is prepared by silk-screen printing technique, obtained below by different coating process Open-circuit voltage Uoc, short circuit current flow Isc, fill factor, curve factor FF, the efficiency Ncell relevant parameter of solar cell.
Table 2
Technique Uoc Isc FF Ncell
Conventional antireflective coating technique 0 0 0 0
Gradual change antireflective coating technique 0.0005 0.03 0.2 0.10%
As can be seen from Table 2, Uoc, Isc of the solar cell obtained by gradual change antireflective coating technique are above routine The Uoc and Isc for the solar cell that antireflective coating technique is obtained, and its efficiency gain 0.10%, the photoelectricity of solar cell turn Efficiency is changed to significantly improve.
The present invention will be described for specific embodiment listed above, it should be pointed out that above-described embodiment is served only for this Invention is described further, and does not represent protection scope of the present invention, other people according to the present invention prompting make it is nonessential Modification and adjustment, still fall within protection scope of the present invention.

Claims (10)

1. a kind of preparation method of solar battery antireflective film, it is characterised in that including:Crystal silicon chip after the diffusion by The SiNx antireflective coatings of PECVD primary depositing gradually changed refractive indexes are used in smooth surface.
2. the preparation method of solar battery antireflective film according to claim 1, it is characterised in that the SiNx anti-reflections That penetrates film refractive index fades to linear gradient.
3. the preparation method of solar battery antireflective film according to claim 1 or 2, it is characterised in that the SiNx The excursion of antireflective coating refractive index is [1.8,2.5].
4. the preparation method of solar battery antireflective film according to claim 1, it is characterised in that use PECVD mono- The SiNx antireflective coatings of secondary deposition gradually changed refractive index include:
It is passed through SiH4And NH3Mixed gas;
The NH being passed through is kept during PECVD3Flow it is constant, change the SiH that is passed through4Flow.
5. the preparation method of solar battery antireflective film according to claim 1, it is characterised in that use PECVD mono- The SiNx antireflective coatings of secondary deposition gradually changed refractive index include:
It is passed through SiH4And NH3Mixed gas;
The NH being passed through is kept during PECVD3Flow it is constant, reduce it is per second in the SiH that is passed through4Flow.
6. the preparation method of solar battery antireflective film according to claim 4, it is characterised in that be passed through SiH4And NH3 Mixed gas include:With SiH4And NH3Volume ratio be 1:3, SiH4Initial flow be 1500sccm, NH3Initial flow SiH is passed through for 4500sccm4And NH3Mixed gas.
7. the preparation method of solar battery antireflective film according to claim 6, it is characterised in that change what is be passed through SiH4Flow include:The SiH being passed through is changed with the 1.5sccm per second that successively decreases4Flow.
8. the preparation method of solar battery antireflective film according to claim 4, it is characterised in that be passed through SiH4And NH3 Mixed gas include:With SiH4And NH3Volume ratio be 1:5, SiH4Initial flow be 1000sccm, NH3Initial flow SiH is passed through for 5000sccm4And NH3Mixed gas.
9. the preparation method of solar battery antireflective film according to claim 8, it is characterised in that change what is be passed through SiH4Flow include:The SiH being passed through is changed with the 1sccm per second that successively decreases4Flow.
10. the preparation method of solar battery antireflective film according to claim 1, it is characterised in that gradually changed refractive index SiNx antireflective coatings thickness between 65nm-100nm.
CN201710521556.9A 2017-06-30 2017-06-30 The preparation method of solar battery antireflective film Pending CN107154437A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107887473A (en) * 2017-11-07 2018-04-06 山西潞安太阳能科技有限责任公司 A kind of solar cell continuous gradation membrane preparation method
CN109037360A (en) * 2018-08-09 2018-12-18 润峰电力有限公司 A kind of solar cell inactivating antireflective film and its coating process
CN109243969A (en) * 2018-08-31 2019-01-18 常州亿晶光电科技有限公司 Tubular type PECVD silicon nitride gradual change membrane process
CN109545710A (en) * 2018-09-29 2019-03-29 东方日升新能源股份有限公司 A kind of film plating process reducing refractive index

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101022135A (en) * 2007-02-09 2007-08-22 江苏艾德太阳能科技有限公司 Silicon solar battery antireflective thin film
CN102534547A (en) * 2011-12-16 2012-07-04 合肥晶澳太阳能科技有限公司 Preparation process for gradient antireflection silicon nitride thin film of crystalline silicon solar cell
CN104952978A (en) * 2015-05-26 2015-09-30 江苏荣马新能源有限公司 Solar cell coating technology

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101022135A (en) * 2007-02-09 2007-08-22 江苏艾德太阳能科技有限公司 Silicon solar battery antireflective thin film
CN102534547A (en) * 2011-12-16 2012-07-04 合肥晶澳太阳能科技有限公司 Preparation process for gradient antireflection silicon nitride thin film of crystalline silicon solar cell
CN104952978A (en) * 2015-05-26 2015-09-30 江苏荣马新能源有限公司 Solar cell coating technology

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107887473A (en) * 2017-11-07 2018-04-06 山西潞安太阳能科技有限责任公司 A kind of solar cell continuous gradation membrane preparation method
CN109037360A (en) * 2018-08-09 2018-12-18 润峰电力有限公司 A kind of solar cell inactivating antireflective film and its coating process
CN109243969A (en) * 2018-08-31 2019-01-18 常州亿晶光电科技有限公司 Tubular type PECVD silicon nitride gradual change membrane process
CN109545710A (en) * 2018-09-29 2019-03-29 东方日升新能源股份有限公司 A kind of film plating process reducing refractive index

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