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Ion scavenger for solar cell, solar cell sealant composition containing same, and solar cell module

A technology of solar cells and ion scavengers, applied in phosphorus compounds, circuits, photovoltaic power generation, etc., can solve the problems of insufficient, bad effect of sealing resin, and corrosion of solar cell components, and achieves the reduction of output and the inhibition of corrosion. Effect

Active Publication Date: 2018-11-09
TOAGOSEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] In Patent Document 4, an example of using zirconium phosphate (an ion exchanger for inorganic use) as a phosphoric acid metal salt is described. Although this ion-scavenging agent captures Na + ions, but not sufficiently, additionally, due to the release of H by ion exchange + ions, so there is a problem that the pH decreases depending on the structure, which adversely affects the sealing resin and promotes the corrosion of the components of the solar cell element such as electrodes.

Method used

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  • Ion scavenger for solar cell, solar cell sealant composition containing same, and solar cell module
  • Ion scavenger for solar cell, solar cell sealant composition containing same, and solar cell module
  • Ion scavenger for solar cell, solar cell sealant composition containing same, and solar cell module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] After dissolving 0.272 mol of zirconium oxychloride octahydrate in 850 mL of pure water, 0.788 mol of oxalic acid dihydrate was added and dissolved. While stirring this aqueous solution, 0.57 mol of phosphoric acid was added. Stirring this, it refluxed at 103 degreeC for 8 hours. After cooling, the obtained precipitate was sufficiently washed with water, and then dried at 150°C to obtain a scaly powder composed of zirconium phosphate. As a result of analyzing this zirconium phosphate, it was confirmed that it was α-zirconium phosphate (H type) (hereinafter referred to as "α-zirconium phosphate (Z1)").

[0123] The above-mentioned α-zirconium phosphate (Z1) was boiled and dissolved in nitric acid to which hydrofluoric acid was added, and then subjected to ICP emission spectroscopic analysis to obtain the following composition formula.

[0124] ZrH 2.03 (PO 4 ) 2.01 0.05H 2 o

[0125] Moreover, when the median diameter of (alpha)-zirconium phosphate (Z1) was measur...

Embodiment 2

[0129] Except that the amount of 0.1N-LiOH aqueous solution used was set to 2500 mL, the same operation as in Example 1 was carried out to manufacture ZrLi in which all cation exchange groups (cation exchange capacity: 6.7 meq / g) were replaced by lithium ions. 2.03 (PO 4 ) 2.01 0.05H 2 Lithium ion substituted α-zirconium phosphate composed of O. The moisture content was 0.3%. Hereinafter, it will be referred to as "all Li substitution type α-zirconium phosphate A1-2".

[0130] Next, the above-mentioned various evaluations were performed using the ion scavenger for solar cells containing this all-Li substituted type α-zirconium phosphate A1-2, and the results are shown in Table 1.

Embodiment 3

[0132] Instead of 0.1N-LiOH aqueous solution, use 0.1N-KOH aqueous solution, in addition, carry out the operation similar to Example 1, manufacture by ZrK 1.03 h 1.00 (PO 4 ) 2.01 0.03H 2 Potassium-substituted α-zirconium phosphate composed of O. The moisture content was 0.5%. This potassium-substituted α-zirconium phosphate is α-zirconium phosphate in which 4 meq / g of the total cation exchange capacity is substituted with lithium ions. Hereinafter, it will be referred to as "4meq-K substitution type α-zirconium phosphate A1-3".

[0133] Next, the above-mentioned various evaluations were performed using the ion scavenger for solar cells containing this 4meq-K substitution-type α-zirconium phosphate A1-3, and the results are shown in Table 1.

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Abstract

The ion scavenger for a solar cell according to the present invention contains (A) an Alpha-zirconium phosphate in which at least a portion of ion-exchange groups is substituted by at least one type of an ion (a1) selected from among a lithium ion, a potassium ion, a cesium ion, a rubidium ion, a magnesium ion, and a calcium ion, and / or (B) an Alpha-titanium phosphate in which at least a portion of ion-exchange groups is substituted by at least one type of an ion (b1) selected from among a lithium ion, a potassium ion, a cesium ion, a rubidium ion, a magnesium ion, and a calcium ion.

Description

technical field [0001] The present invention relates to the highly selective adsorption of Na which leads to the PID (Potential Induced Decay) of solar cells + Ions, thereby providing a solar cell excellent in PID resistance, an ion scavenger for a solar cell, a sealant composition for a solar cell containing the same, and a solar cell module. Background technique [0002] Due to increasing awareness of environmental issues, solar cells are being utilized as clean energy. Generally, a solar cell is a complex including a plurality of solar cell modules having a structure including a front-side transparent protective member, a layer sealing a solar cell element, and a rear-side protective member (back sheet). [0003] In recent years, there has been a rapid increase in large-scale photovoltaic power generation systems called giant solar cells, in which a large number of crystalline silicon solar cell modules are installed on large sites to construct photovoltaic power generat...

Claims

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Application Information

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IPC IPC(8): C01B25/45C08K3/32C08L23/08C08L101/00H01L31/048
CPCC01B25/45C08K3/32C08L23/08C08L101/00H01L31/048Y02E10/50Y02P20/133H01L31/0481
Inventor 大野康晴
Owner TOAGOSEI CO LTD
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