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Preparation method of Topcon structure solar cell silver paste

A technology of solar cells and silver paste, applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problems of raw material accumulation, difficulty in mixing uniformly, inconvenient quantitative feeding, etc., to avoid raw materials Accumulation, uniform and fast effect of raw material mixing

Inactive Publication Date: 2021-09-07
DK ELECTRONICS MATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the disadvantages in the prior art that it is inconvenient to quantitatively feed silver powder, lead-free glass powder and absolute ethanol when mixing, and the feeding method is continuous feeding, which easily causes the accumulation of raw materials and is not easy to mix uniformly. And the preparation method of a kind of Topcon structure solar cell silver paste that proposes

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  • Preparation method of Topcon structure solar cell silver paste

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Comparison scheme
Effect test

Embodiment 1

[0029] refer to figure 1 , a preparation method of Topcon structure solar cell silver paste, comprising the following steps:

[0030] S1. First, put the silver powder, lead-free glass powder and absolute ethanol into three hoppers respectively. Solenoid valves are installed at the outlets of the three hoppers, and the weights of the three hoppers are measured by three weight sensors. , to transmit the measurement data to the control center;

[0031] S2. Set the amount of silver powder, lead-free glass powder and absolute ethanol for a single addition, and program the PLC controller according to the set amount;

[0032] S3, through the PLC controller to control the solenoid valve to open, the silver powder, lead-free glass powder and absolute ethanol in the three feeding hoppers enter the mixing container, and at the same time, the mixing container starts to stir;

[0033] S4. Use the timer to record the single opening time of the solenoid valve, and transmit the recorded dat...

Embodiment 2

[0046] refer to figure 1 , a preparation method of Topcon structure solar cell silver paste, comprising the following steps:

[0047] S1. First, put the silver powder, lead-free glass powder and absolute ethanol into three hoppers respectively. Solenoid valves are installed at the outlets of the three hoppers, and the weights of the three hoppers are measured by three weight sensors. , to transmit the measurement data to the control center;

[0048] S2. Set the amount of silver powder, lead-free glass powder and absolute ethanol for a single addition, and program the PLC controller according to the set amount;

[0049]S3, through the PLC controller to control the solenoid valve to open, the silver powder, lead-free glass powder and absolute ethanol in the three feeding hoppers enter the mixing container, and at the same time, the mixing container starts to stir;

[0050] S4. Use the timer to record the single opening time of the solenoid valve, and transmit the recorded data...

Embodiment 3

[0063] refer to figure 1 , a preparation method of Topcon structure solar cell silver paste, comprising the following steps:

[0064] S1. First, put the silver powder, lead-free glass powder and absolute ethanol into three hoppers respectively. Solenoid valves are installed at the outlets of the three hoppers, and the weights of the three hoppers are measured by three weight sensors. , to transmit the measurement data to the control center;

[0065] S2. Set the amount of silver powder, lead-free glass powder and absolute ethanol for a single addition, and program the PLC controller according to the set amount;

[0066] S3, through the PLC controller to control the solenoid valve to open, the silver powder, lead-free glass powder and absolute ethanol in the three feeding hoppers enter the mixing container, and at the same time, the mixing container starts to stir;

[0067] S4. Use the timer to record the single opening time of the solenoid valve, and transmit the recorded dat...

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Abstract

The invention belongs to the field of preparation of solar cell silver paste, particularly relates to a preparation method of Topcon structure solar cell silver paste, and aims to solve the problems that when silver powder, lead-free glass powder and absolute ethyl alcohol are mixed at present, quantitative feeding is inconvenient; meanwhile, the feeding mode is continuous feeding, raw materials are easily accumulated, and uniform mixing is not easy. According to the technical scheme, the method comprises the following steps of S1, putting the silver powder, the lead-free glass powder and the absolute ethyl alcohol in three feeding hoppers respectively, arranging the electromagnetic valves at the discharging ports of the three feeding hoppers, measuring the weights of the three feeding hoppers through three weight sensors, and transmitting the measured data to a control center; S2, arranging the amounts of the silver powder, the lead-free glass powder and the absolute ethyl alcohol added at a time, and programming a PLC according to the set amounts. According to the present invention, the quantitative feeding can be conducted, meanwhile, by adopting a discontinuous feeding mode, raw material accumulation is avoided, and the raw material mixing is more uniform and rapid.

Description

technical field [0001] The invention relates to the technical field of solar cell silver paste preparation, in particular to a preparation method of a Topcon structure solar cell silver paste. Background technique [0002] A solar cell is a photoelectric semiconductor sheet that uses sunlight to generate electricity directly, also known as a "solar chip" or "photovoltaic cell". Generating current, solar cell silver paste is an auxiliary material that plays a key role in the conversion efficiency of the cell, and plays a very important role in increasing the open circuit voltage and short circuit current of the cell, thereby improving the photoelectric conversion efficiency of the cell. The silver paste is printed on the front side of the silicon substrate by screen printing, and is sintered in a tunnel sintering furnace to form a grid line electrode. When preparing the silver paste for Topcon structure solar cells, silver powder, lead-free glass powder and absolute ethanol s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/16H01B1/22H01B13/00H01L31/0224
CPCH01B1/16H01B1/22H01B13/00H01L31/022425Y02E10/50
Inventor 张洪旺裘慧广黄立夫
Owner DK ELECTRONICS MATERIALS INC