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Phosphorus-doped paste for selective emitter solar cell and preparation method thereof

A solar cell and emitter technology, applied in photovoltaic power generation, cable/conductor manufacturing, conductive materials dispersed in non-conductive inorganic materials, etc. Ideal, unable to meet printing needs and other problems, to achieve the effect of reducing production costs, improving chemical stability, and promoting industrialization

Active Publication Date: 2020-12-01
GUANGDONG AIKO SOLAR ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has high requirements on the performance of phosphorus-doped slurry, which needs to have suitable viscosity and good printability; while the traditional phosphorus-doped slurry has unsatisfactory advection and thixotropy, which cannot meet the printing requirements, and the yield rate is low. ; At the same time, due to the poor stability of the traditional slurry, the storage time is short, which increases the production cost

Method used

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Examples

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preparation example Construction

[0046] Correspondingly, the present invention also provides a method for preparing the above-mentioned phosphorus-doped slurry for selective emitter solar cells, which includes:

[0047] (1) Fully mixing the solvent and the thickener to obtain an organic vehicle;

[0048] Specifically, add the solvent and the thickener into the mixing tank, add water and stir at a certain speed until the solvent and the thickener are fully mixed; preferably, keep the temperature at 50-70°C during the stirring process; Temperature can speed up the dissolution of solvents and thickeners. Preferably, after the stirring is completed, filtering is performed, and the organic carrier is obtained after the filtering is completed.

[0049] (2) adding an inorganic binder, a functional additive, and silver powder in sequence to the organic vehicle and mixing them fully to obtain an intermediate slurry;

[0050] Specifically, the organic carrier is put into a stirring tank, and the inorganic binder, fun...

Embodiment 1

[0063] Phosphorus doped paste formula:

[0064] 15 parts of solvent, 3 parts of thickener, 2 parts of inorganic binder, 4 parts of functional additive, 85 parts of silver powder.

[0065] Wherein the solvent is acetone; the thickener is methyl cellulose;

[0066] Functional additives include: 15 parts of fumed silica; 26 parts of polyolefin wax; 25 parts of modified hydrogenated castor oil; 29 parts of reducing agent; Trimethyl phosphate;

[0067] Inorganic binders include: 3 parts of boron trioxide, 1 part of aluminum oxide, 1 part of lithium oxide, 3 parts of silicon dioxide, 5 parts of phosphorus pentoxide, 21 parts of vanadium pentoxide, 42 parts of zinc oxide, 31 parts of lead oxide, 6 parts of titanium oxide, and 8 parts of potassium oxide.

[0068] Preparation:

[0069] (1) Fully mixing the solvent and the thickener to obtain an organic vehicle;

[0070] Wherein, during the mixing process, the control temperature is 55-60°C;

[0071] (2) adding an inorganic binder...

Embodiment 2

[0075] Phosphorus doped paste formula:

[0076] 20 parts of solvent, 4 parts of thickener, 4 parts of inorganic binder, 3 parts of functional additive, 77 parts of silver powder.

[0077] Wherein the solvent is terpineol; the thickener is ethyl cellulose;

[0078] Functional additives include: 12 parts of fumed silica; 30 parts of polyolefin wax; 28 parts of modified hydrogenated castor oil; 36 parts of reducing agent; trimethyl ester;

[0079] Inorganic binders include: 2.5 parts of boron trioxide, 2 parts of aluminum oxide, 4 parts of silicon dioxide, 3 parts of phosphorus pentoxide, 30 parts of vanadium pentoxide, 48 parts of zinc oxide, 30 parts of lead oxide, 8 parts of titanium oxide, 3 parts of potassium oxide.

[0080] Preparation:

[0081] (1) Fully mixing the solvent and the thickener to obtain an organic vehicle;

[0082] Wherein, during the mixing process, the control temperature is 55-60°C;

[0083] (2) adding an inorganic binder, a functional additive, and ...

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Abstract

The invention discloses a phosphorus-doped slurry material for a selective emitting electrode solar battery. The slurry material is mainly prepared from the following raw materials in parts by weight:5-20 parts of solvent; 1-5 parts of thickening agents; 1-5 parts of inorganic binder agents, 1-5 parts of functional additives, and 70-90 parts of silver powder. Correspondingly, the invention further discloses a preparation method of the slurry material. The doping slurry material prepared by a printing method is used to replace high-cost laser, and the phosphorus-doped slurry material is helpful for improving the production yield and the electrical performance of the solar battery.

Description

technical field [0001] The invention relates to the field of solar cell preparation, in particular to a phosphorus-doped slurry for a selective emitter solar cell and a preparation method thereof. Background technique [0002] A solar cell is a device that effectively absorbs solar photon energy and uses the photoelectric conversion effect to convert light energy into electrical energy. When solar light shines on the surface of the solar cell, the PN junction in the solar cell effectively absorbs the photon energy in the sun, using the inherent built-in electric field in the PN junction, the electrons and holes are separated, and the electrons are drawn out by the electrodes, and the outside world forms The circuit, so the solar cell completes the output of electric energy under the light. [0003] At present, the method for preparing high-efficiency solar cells is to achieve selective doping of the emitter, and selectively re-doped phosphorus in a certain area of ​​​​the N...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L21/24H01L31/18H01B1/02H01B1/22H01B13/00
CPCH01B1/02H01B1/22H01B13/00H01L21/24H01L31/1876Y02E10/50Y02P70/50
Inventor 周新方结彬林纲正何达能陈刚
Owner GUANGDONG AIKO SOLAR ENERGY TECH CO LTD
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