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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0008] Example one

[0009] Cellulose acetate butyrate3％ Butyl Carbitol50％ Butyl Carbitol Acetate20％ Acrylic6％ Alcohol ester 1212％ Tween-857％ Tributyl Citrate2％

[0010] (1) Preparation of the organic carrier: After weighing the above-mentioned components in proportions, place them in a reactor and heat to 80-100°C, stir while heating, and stir for 5-8 hours. Filter the carrier with a 200-mesh screen. Put it in a stainless steel bucket for later use.

[0011] ZnO35％ Bi 2 O 3

[0012] (2) Preparation of lead-free glass powder: weigh the above-mentioned components in proportion, mix them evenly with a mixer, put them into a quartz crucible, dry in a 110 ℃ oven for 2 to 3 hours, and then take out the quartz crucible Smelt in a box furnace at a temperature of 20℃ / min to 1000℃~1300℃ for 0.3~0.8h, then quench with deionized water and dry the glass slag, put it in a jaw crusher, and crush it to less than 25μm . Then dry ball milling for 1.5~3h, sieving to obtain lead-free g...

Example Embodiment

[0015] Embodiment two:

[0016] Cellulose acetate butyrate4％ Butyl Carbitol55％ Butyl Carbitol Acetate20％ Acrylic2％ Alcohol ester 1210％ Tween-854％ Tributyl Citrate5％

[0017] (1) Preparation of the organic carrier: After weighing the above-mentioned components in proportions, place them in a reactor and heat to 80-100°C, stir while heating, and stir for 5-8 hours. Filter the carrier with a 200-mesh screen. Put it in a stainless steel bucket for later use.

[0018] ZnO44％ Bi 2 O 3

[0019] (2) Preparation of lead-free glass powder: weigh the above-mentioned components in proportion, mix them evenly with a mixer, put them into a quartz crucible, dry in a 110 ℃ oven for 2 to 3 hours, and then take out the quartz crucible Smelt in a box furnace at a temperature of 20℃ / min to 1000℃~1300℃ for 0.3~0.8h, then quench with deionized water and dry the glass slag, put it in a jaw crusher, and crush it to less than 25μm . Then dry ball milling for 1.5~3h, sieving to obtain lead-fr...

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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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