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Back passivation solar cell aluminum paste

A solar cell and back passivation technology, applied in the field of solar cells, can solve the problems of affecting the passivation effect and insufficient pulling force

Inactive Publication Date: 2017-01-11
JIANGSU ZHENGNENG ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Secondly, the aluminum paste and the alumina passivation layer cannot react too much, which will affect the passivation effect, but they must not react without causing insufficient pulling force

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Cellulose acetate butyrate 3％ Butyl Carbitol 50％ Butyl Carbitol Acetate 20％ Acrylic 6％ Alcohol ester dodeca 12％ Tween-85 7％ tributyl citrate 2％

[0010] (1) Preparation of the organic carrier: after weighing the above-mentioned components in proportion, place them in a reaction kettle and heat them to 80-100°C, stir while heating for 5-8 hours, and filter the carrier with a 200-mesh screen. Store in a stainless steel barrel for later use.

[0011] ZnO 35％ Bi 2 o 3

18％ h 2 B 2 o 4

15％ SiO 2

2％ CaCO 3

2％ Al 2 o 3

1％ Sb 2 o 3

10％ BaCO3 10％ MoO 3％ BeO 1％ La2O3 3％

[0012] (2) Preparation of lead-free glass powder: weigh the above components in proportion, mix them evenly with a mixer, put them into a quartz crucible, dry them in an oven at 110°C for 2 to 3 hours, then take out the quartz crucible and place Heat up th...

Embodiment 2

[0016] Cellulose acetate butyrate 4％ Butyl Carbitol 55％ Butyl Carbitol Acetate 20％ Acrylic 2％ Alcohol ester dodeca 10％ Tween-85 4％ tributyl citrate 5％

[0017] (1) Preparation of the organic carrier: after weighing the above-mentioned components in proportion, place them in a reaction kettle and heat them to 80-100°C, stir while heating for 5-8 hours, and filter the carrier with a 200-mesh screen. Store in a stainless steel barrel for later use.

[0018] ZnO 44％ Bi 2 o 3

13％ h 2 B 2 o 4

12％ SiO 2

1％ CaCO 3

1.5％ Al 2 o 3

0.5％ Sb 2 o 3

10％ BaCO3 10％ MoO 4％ BeO 1％ La2O3 3％

[0019] (2) Preparation of lead-free glass powder: weigh the above components in proportion, mix them evenly with a mixer, put them into a quartz crucible, dry them in an oven at 110°C for 2 to 3 hours, then take out the quartz crucible and place Heat u...

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PUM

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Abstract

The invention relates to a back passivation solar cell aluminum paste, which is characterized in that the aluminum paste is composed of, by weight, 75 to 85% of aluminum powder, 2 to 8% of lead-free glass powder, 15 to 23% of an organic bond, 1.5 to 3.6% of an inorganic bond, the remaining being an organic carrier, wherein the sum of weight percents of all components is 100%; and the aluminum powder, the organic bond, the inorganic bond, the organic carrier and the lead-free glass powder are uniformly mixed and then rolled by using a three-roll grinder to be the back passivation solar cell aluminum paste with the fineness no more than 15 mum and the viscosity 25 to 37 Pa.s. The crystalline silicon solar cell back field aluminum paste has the advantages that the photoelectric conversion efficiency is high; the adhesion is high; the adhesion conversion efficiency attenuation after high-temperature aging is reduced; and the water boiling-resistance performance is good.

Description

technical field [0001] The invention relates to a back field aluminum paste for a crystalline silicon solar cell, in particular to a back field aluminum paste for a crystalline silicon solar cell with high efficiency and low warpage and a preparation method thereof, belonging to the technical field of solar cells. Background technique [0002] Reducing the cost of solar power generation is the goal pursued by the increasingly competitive photovoltaic industry. First: To reduce the cost of silicon raw materials, it is generally necessary to develop thinner silicon wafers. The use of thinner silicon wafers is one of the future development trends of the crystalline silicon solar cell industry. The lack of silicon raw materials has accelerated the development of silicon wafers into thin slices. The thickness of silicon wafers used by many photovoltaic companies is already between 180 and 220 μm, and the back of solar cells at this stage basically uses an aluminum back field. Th...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01L31/0224H01L31/18
CPCY02P70/50
Inventor 郭宏彬
Owner JIANGSU ZHENGNENG ELECTRONICS TECH CO LTD
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