Low-melting point glass powder for silver pastes on fronts of silicon solar cells and preparation method of glass powder

A silicon solar cell and low-melting glass technology, which is applied in the field of lead-free low-melting glass powder for front silver paste of crystalline silicon solar cells and its preparation, can solve the problem of the uniformity of anti-reflection film silver powder and silicon substrate without considering the particle size distribution. Focus on the influence of power and conductivity, without considering the influence of shadow absorption efficiency and conversion efficiency of contact grid lines and electrodes, and without considering the absorption and reflection of printed grid lines and electrodes, so as to improve photoelectric conversion efficiency and service life, low softening point, and raw materials The effect of less ingredients

Active Publication Date: 2013-02-06
贵州威顿晶磷电子材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the Chinese patent with the publication number CN101483207A discloses an environment-friendly silver conductor paste for the front grid wire electrodes of silicon solar cells, which uses Ba-Zn-B glass powder, which can well melt the anti-reflection of the silicon surface of silicon solar cells. film, so that silver and silicon can be in good contact, so that the battery sheet has excellent photoelectric conversion performance, but the glass powder has more components, the production control is more complicated, the glass softening point is high, and the glass powder particle size is large, which affects the slurry. The sintering performance of the material
[0004] In the application publication number CN102126829A Chinese patent discloses a lead-

Method used

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  • Low-melting point glass powder for silver pastes on fronts of silicon solar cells and preparation method of glass powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Batching 1000g according to the formula of Example 1 in Table 1, and mix evenly, put the mixture in the platinum crucible, cover the platinum crucible and put it into a silicon carbide rod resistance furnace for heating and melting, the heating and melting temperature is 1050 ° C, and the heat preservation is 30 Minutes; the melted glass liquid is immediately poured into pure water, and after water quenching, fine particles are formed, and dried in an oven at 120°C under normal pressure; the dried glass particles are crushed with a jet mill until the particle size D90 is below 8um , and then use a ball mill to further pulverize to a particle size of D90 to below 5um; classify the obtained glass powder with a particle size of below 5um with an air flow separator to obtain a low melting point with a particle size of 0.3-4um and a particle size span of less than 1.3 Glass powder, the performance parameters of the test glass powder are shown in Table 1, the prepared glass po...

Embodiment 2

[0025] Batching 1000g according to the formula of Example 2 in Table 1, and mix evenly, put the mixture in the platinum crucible, cover the platinum crucible and put it into a silicon carbide rod resistance furnace for heating and melting, the heating and melting temperature is 1000 ° C, and the heat preservation is 40 Minutes; the melted glass liquid is immediately poured into pure water, and after water quenching, fine particles are formed, and dried in an oven at 120°C under normal pressure; the dried glass particles are crushed with a jet mill until the particle size D90 is below 8um , and then use a ball mill to further pulverize to a particle size of D90 to below 5um; classify the obtained glass powder with a particle size of below 5um with an air flow separator to obtain a low melting point with a particle size of 0.3-4um and a particle size span of less than 1.3 Glass powder, the performance parameters of the test glass powder are shown in Table 1, the prepared glass po...

Embodiment 3

[0027]Batching 1000g according to the formula of Example 3 in Table 1, and mix evenly, put the mixture in the platinum crucible, cover the platinum crucible and put it into a silicon carbide rod resistance furnace for heating and melting, the heating and melting temperature is 1000 ° C, and the heat preservation is 50 Minutes; the melted glass liquid is immediately poured into pure water, and after water quenching, fine particles are formed, and dried in an oven at 120°C under normal pressure; the dried glass particles are crushed with a jet mill until the particle size D90 is below 8um , and then use a ball mill to further pulverize to a particle size of D90 to below 5um; classify the obtained glass powder with a particle size of below 5um with an air flow separator to obtain a low melting point with a particle size of 0.3-4um and a particle size span of less than 1.3 Glass powder, the performance parameters of the test glass powder are shown in Table 1, the prepared glass pow...

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Abstract

The invention discloses low-melting point glass powder for silver pastes on fronts of silicon solar cells and a preparation method of the glass powder. The low-melting point glass powder is mainly used as a binder for the silver pastes on the fronts of the silicon solar cells and comprises the following components in percentage by weight: 30-60% of Bi2O3, 1.5-18% of B2B3, 1-13% of ZnO, 1-15% of Al2O3, 0.1-6% of BaO, 10-45% of TeO2 and 3-25% of SiO2. The preparation method comprises the steps of: (1) weighing to prepare a mixture; (2) adding the mixture into a crucible and adding a cover for smelting; (3) carrying out water quenching on the smelted glass liquid; (4) drying and crushing; and (5) grading the powder. The prepared glass powder is favorable in conductivity, is capable of decreasing the absorption and the reflection of printed grid lines and electrodes to the sunlight and decreasing the shadow loss of contacting the grid lines and the electrode, has relatively low softening point and low thermal expansion coefficient at the same time and is beneficial for improving the photoelectric conversion efficiency and prolonging the service life of the solar cells.

Description

technical field [0001] The invention relates to the technical field of electronic materials, in particular to a lead-free low-melting-point glass powder for front silver paste of crystalline silicon solar cells and a preparation method thereof. Background technique [0002] Photovoltaic industry, as a sunrise industry in the 21st century, has broad prospects for development. It has been widely valued by countries all over the world, and a lot of human and financial resources have been invested in research and development. The key to affecting the efficiency of solar energy utilization is how to improve the conversion efficiency of solar cells. The factors that affect the conversion efficiency of solar cells mainly include the surface reflection loss of the battery, the shadow loss of the contact grid line and the electrode, the non-absorbing optical loss of the long-wave band, the recombination of photogenerated carriers on the surface and body of the semiconductor, and the b...

Claims

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Application Information

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IPC IPC(8): C03C12/00
Inventor 刘顺勇李飞代勇赵和英郭之军贺思全陈文强吕昌
Owner 贵州威顿晶磷电子材料股份有限公司
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