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High-adhesion solar cell lead-free aluminum slurry

A solar cell and high adhesion technology, applied in the field of solar cells, can solve the problems of inability to form ohmic contact between the aluminum film and the silicon substrate, reduce the cost of crystalline silicon solar cells, low warpage and strong adhesion, etc. Interconnectivity, good ohmic contact, improved printing performance

Inactive Publication Date: 2018-02-09
JIANGSU ZHENGNENG ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) The organic binder in the slurry contains low-toxic substances, which volatilizes seriously during the preparation process, has low efficiency, and is very harmful to the human body;
[0006] (2) Inorganic adhesive metal glass powder contains toxic elements such as lead, which is harmful to the environment and human body to a certain extent;
[0007] (3) Good ohmic contact cannot be formed between the aluminum film and the silicon substrate, and it is easy to fall off and blister, resulting in low photoelectric conversion efficiency;
[0008] (4) In order to reduce the cost of crystalline silicon solar cells, the requirements of low warpage and strong adhesion cannot be met at the same time

Method used

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  • High-adhesion solar cell lead-free aluminum slurry
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Experimental program
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Effect test

Embodiment 1

[0018] 1. Aluminum powder

[0019] Aluminum powder Aluminum powder D50 density 2.3um and aluminum powder D50 density 5.6um mixed tap density 4.7um, oxygen content is 1.3-1.8 and the shape is spherical.

[0020] 2. Preparation of organic binder

[0021] Weigh 50% of terpineol, 5% of ethyl cellulose, 40% of butyl carbitol acetate, 14% of acetate, and 5% of BYK316N and mix them evenly. After mixing the above materials, heat to 80-100°C and dissolve for 100 minutes to obtain Transparent colloid with good lubricity and printability.

[0022] 3. Preparation of lead-free glass powder

[0023] Bi 2 o 3 60 parts, Sb 2 o 3 10 copies, Sio 2 8 parts, Al 2 o 3 2 copies, V 2 o 3 2 copies, B 2 o 3 10 parts, ZnO6 parts, Zro 2 After the 2 parts are mixed evenly with a mixer, put them into a ceramic crucible, dry them in an oven at 150°C for 2 hours, put them in a muffle furnace, melt them at 1000-1200°C for 1 hour, dry them after water quenching, and then use a planetary ball mil...

Embodiment 2

[0032] 1. Aluminum powder

[0033] Aluminum powder Aluminum powder D50 density 2.3um and aluminum powder D50 density 5.6um mixed tap density 4.7um, oxygen content is 1.3-1.8 and the shape is spherical.

[0034] 2. Preparation of organic binder

[0035] Weigh 40% of terpineol, 5% of ethyl cellulose, 35% of butyl carbitol acetate, 14% of acetate, and 5% of BYK316N and mix them evenly. After the above materials are mixed, they are heated to 80-100°C and dissolved for 100 minutes to obtain Transparent colloid with good lubricity and printability.

[0036] 3. Preparation of lead-free glass powder

[0037] Bi 2 o 3 75 parts, Sb 2 o 3 40 copies, Sio 2 6 parts, Al 2 o 3 2 copies, V 2 o 3 1 copy, B 2 o 3 12 parts, ZnO5 parts, Zro 2 After the 2 parts are mixed evenly with a mixer, put them into a ceramic crucible, dry them in an oven at 150°C for 2 hours, put them in a muffle furnace, melt them at 1000-1200°C for 1 hour, dry them after water quenching, and then use a plane...

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Abstract

The invention relates to high-adhesion solar cell aluminum slurry. The lead-free aluminum slurry comprises the following raw materials: by weight, 75 to 90 parts of aluminum powder, 15 to 30% of an organic binder and 1 to 10% of lead-free glass powder, and the sum of the weight percents of the above components is 100%. The high-adhesion solar cell aluminum slurry of the invention has the advantages that no toxic substances such as lead are contained; harm to a human body is little; good ohmic contact can be formed between an aluminum film and a silicon substrate; the warp degree is low; the boiling resistance is good; the photoelectric conversion efficiency is high; and falling off is not easy.

Description

technical field [0001] The invention relates to a back field aluminum paste of a crystalline silicon solar cell, belonging to the technical field of solar cells. Background technique [0002] Solar energy is a kind of green energy. People pay more and more attention to it because of its advantages of non-pollution, inexhaustibility, and not limited by geographical resources, so solar cells emerge as the times require. A crystalline silicon solar cell is a device that can respond to light energy and convert light energy into electrical energy. It can convert light energy into electrical energy by using the photovoltaic effect. The back field aluminum paste of crystalline silicon solar cells is mainly composed of aluminum powder, organic binder and inorganic binder-metal glass powder. Aluminum powder is used as the functional phase in the aluminum electrode paste. After sintering, the aluminum powder is connected to each other to form a conductive channel, and forms a silicon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01L31/0224
CPCH01B1/16H01B1/22H01L31/022441Y02E10/50
Inventor 郭宏彬
Owner JIANGSU ZHENGNENG ELECTRONICS TECH CO LTD
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