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A plant source composite binder for polycrystalline silicon solar cell light back electrode paste and preparation method thereof

A technology of solar cells and back electrodes, applied in conductive materials, circuits, photovoltaic power generation and other directions dispersed in non-conductive inorganic materials, can solve the problem of insufficient photoelectric conversion rate of batteries, large environmental pollution, and weak adhesion to silicon plates, etc. problem, to achieve the effect of improving the photoelectric conversion rate, low price, and avoiding the phenomenon of clumping

Inactive Publication Date: 2017-06-23
原文昊
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. The adhesion of the back electrode paste to the silicon plate is not strong after sintering
[0005] 2. The photoelectric conversion rate of the battery is not enough
[0006] 3. The use of organic solvents as dispersing binders causes excessive environmental pollution, poses a challenge to increasingly serious environmental problems, and poses a major threat to the health of workers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A plant-derived composite binder for the paste of the photo-rear electrode of a polycrystalline silicon solar cell, and its components and contents are shown in Table 1.

[0024] Its preparation method comprises the following steps:

[0025] 1) Gum Arabic, alginate, and safflower gum are mixed and then ground;

[0026] 2) dissolving the mixture ground in step 1) in water to form a binder solution;

[0027] 3) Under the condition of ultrasonic stirring, evenly disperse the talc powder in the binder solution.

[0028] The intensity of the ultrasound is 200-250w / cm 2 , preferably 225w / cm 2 .

[0029] The adhesive strength of this implementation adhesive is shown in Table 1.

[0030] Use this practice to mix the binder with conductive carbon fiber and active material (metal complex) to make a slurry, then print the slurry on a clean and dry glass substrate with a mesh of 40T to 120T, and then put it into the muffle Carry out high-temperature sintering in the furnace, ...

Embodiment 2

[0032] A plant-derived composite binder for the paste of the photo-rear electrode of a polycrystalline silicon solar cell, and its components and contents are shown in Table 1.

[0033] Its preparation method is with embodiment 1.

[0034] The adhesive strength of this implementation adhesive is shown in Table 1.

[0035] See Table 1 for the photoelectric conversion efficiencies of the polycrystalline silicon solar cells prepared by mixing the binder, the conductive agent, and the active material to form a slurry in this embodiment.

Embodiment 3

[0037] A plant-derived composite binder for the paste of the photo-rear electrode of a polycrystalline silicon solar cell, and its components and contents are shown in Table 1.

[0038] Its preparation method is with embodiment 1.

[0039] The adhesive strength of this implementation adhesive is shown in Table 1.

[0040] See Table 1 for the photoelectric conversion efficiencies of the polycrystalline silicon solar cells prepared by mixing the binder, the conductive agent, and the active material to form a slurry in this embodiment.

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Abstract

The invention discloses a plant-source composite binder used for a polycrystalline silicon solar cell light back side electrode slurry. The binder comprises, by weight, 6-10 parts of an Arabic gum, 2-6 parts of a sodium alginate, 0.2-2 parts of a sesbania gum, 0.05-0.2 parts of a talcum powder and 100 parts of water. The Arabic gum, the sodium alginate and the sesbania gum, which are low in price, safe and green, are composited and taken as a bonding component, and non-toxic water is taken as a solvent so that a binder solution with a stable structure can be formed. Simultaneously, because of adding of the talcum powder, dispersing performance of the binder solution is increased, generation of a coagulation phenomenon is avoided and troubles in a technology are reduced. By using the composite binder, photoelectric conversion efficiency of a solar cell is increased and simultaneously a viscosity is higher than bonding strength of a general organic binder. The composite gum adopted in the invention is a safe and harmless plant gum and possesses water solubility. The water can be taken as the binder so that a condition that a traditional binder is a toxic and organic solvent is avoided and an electrode slurry preparation process is green and environmental-protection.

Description

technical field [0001] The invention relates to a binder for solar cell photoelectrode paste, which belongs to the field of cell manufacturing. Background technique [0002] As a new energy source, solar energy has attracted more and more attention under the environment of global warming and smog. Among various thin-film solar cells, dye-sensitized solar cells have attracted more and more attention due to their advantages such as simple manufacturing process, easy mass production, and low cost. In dye-sensitized solar cells, the performance of the porous photoanode is particularly important to the performance of the cell, so there have been more and more studies on the photoanode film over the years. [0003] Compared with monocrystalline silicon, polycrystalline silicon thin-film solar cells have low cost and higher efficiency than amorphous silicon thin-film solar cells. The highest conversion efficiency in the laboratory is 18%, and the conversion efficiency in industria...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/20H01L31/0224
CPCH01B1/20H01L31/022425Y02E10/50
Inventor 林展刘培杨李高然高学会刘杰汪倩倩
Owner 原文昊
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