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Glass powder for PERC aluminum paste and preparation method thereof

A technology of glass powder and aluminum paste, applied in the field of back electrode paste of solar cells, can solve the problem that there is a large space for improving efficiency, and achieve the effects of being conducive to bonding, matching thermal expansion coefficient, and high softening point

Active Publication Date: 2018-02-09
GUANGZHOU RUXING TECH DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Compared with conventional batteries, the efficiency of PERC batteries has been significantly improved, but there is still a lot of room for improving efficiency through back-field aluminum paste

Method used

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  • Glass powder for PERC aluminum paste and preparation method thereof
  • Glass powder for PERC aluminum paste and preparation method thereof
  • Glass powder for PERC aluminum paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The glass powder for PERC aluminum paste provided in this embodiment is made of the following raw materials in mass percentage:

[0033]

[0034] The preparation method of the glass powder for PERC aluminum paste comprises the following steps: selecting raw materials, mixing them evenly, and melting them in a muffle furnace to obtain a refining liquid, drying and crushing the refining liquid after water quenching, and then ball milling and drying. Prepare glass frit for PERC aluminum paste.

[0035] Among them, a V-type mixer is used for dry mixing during mixing, the temperature during smelting is 900°C-1200°C, and the holding time is 30-90min.

[0036] Deionized water is used for water quenching, deionized water is used as the medium for ball milling, and the ball milling time is 20-48 hours. After the ball-milled glass slurry is left to stand, the upper layer of water is separated and removed, and then dried in an oven at 110-130°C.

Embodiment 2

[0038] The glass powder for PERC aluminum paste provided in this embodiment is made of the following raw materials in mass percentage:

[0039]

[0040] For the preparation method of the glass powder for PERC aluminum paste, refer to Example 1.

Embodiment 3

[0042] The glass powder for PERC aluminum paste provided in this embodiment is made of the following raw materials in mass percentage:

[0043]

[0044] For the preparation method of the glass powder for PERC aluminum paste, refer to Example 1.

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Abstract

The invention discloses glass powder for PERC aluminum paste. The glass powder is mainly prepared from the following raw materials by mass: 10 to 40% of B2O3, 0 to 10% of SiO2, 5 to 30% of ZnO, 5 to 30% of BaO, 5 to 30% of CaO, 1 to 10% of TiO2, 1 to 20% of V2O5, 1 to 10% of K2O and 0.1 to 1% of La2O3. When applied to the PERC aluminum paste, the glass powder can reduce corrosion of the aluminum paste to a passive film layer at a high temperature and promote formation of alloy in local contact areas. The invention also discloses a preparation method for the glass powder applied to the PERC aluminum paste.

Description

technical field [0001] The invention belongs to the technical field of solar cell back electrode paste, and in particular relates to a glass powder for PERC aluminum paste and a preparation method thereof. Background technique [0002] Crystalline silicon solar PERC cell technology utilizes SiNx and Al 2 o 3 A passivation layer is formed on the back of the battery, and then the passivation layer is locally etched by laser. The passivation layer can reduce defects on the silicon surface, increase the lifetime of minority carriers, increase the long-wave reflection effect on the back side, and increase the absorption of incident light. Compared with conventional solar cells, PERC cells have obvious advantages in Voc and Isc, and have higher photoelectric conversion efficiency. [0003] The main components of PERC battery aluminum paste are aluminum powder, inorganic binder, organic binder and other additives. Unlike conventional aluminum paste, PERC aluminum paste only form...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/068
Inventor 谢欣丁冰冰
Owner GUANGZHOU RUXING TECH DEV
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