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Method for quickly determining burn-through depth of metal slurry without damage

A metal paste, non-damaging technology, applied in the direction of material excitation analysis, electrical components, circuits, etc., can solve the problems of reduced burn-through depth of metal paste, no detection of burn-through depth of metal paste, etc., and achieves a simple detection method convenient effect

Active Publication Date: 2019-12-06
东方日升(江苏)新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned invention patent application has the advantage of greatly reducing the burn-through depth of the metal paste, but it still does not provide a more convenient method for detecting the burn-through depth of the metal paste

Method used

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  • Method for quickly determining burn-through depth of metal slurry without damage
  • Method for quickly determining burn-through depth of metal slurry without damage
  • Method for quickly determining burn-through depth of metal slurry without damage

Examples

Experimental program
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Effect test

Embodiment 1

[0027] This embodiment provides a method for quickly judging the burn-through depth of metal paste without damage, such as figure 1 shown, including the following steps:

[0028] Step 1: Take the cleaned P-type silicon wafer as the substrate;

[0029] Step 2: grow a passivation film on the surface of the substrate, the passivation film is AlO x / SiN x Double-layer passivation film, the total thickness of the passivation film is 200nm, and the sample to be processed is obtained;

[0030] Step 3: Coating the metal paste on one side of the sample to be treated obtained in Step 2, and then sintering, the sintering temperature is 800°C, to obtain the experimental sample;

[0031] Step 4: Use the PL tester to collect the PL intensity values ​​of the metal paste area 1 and non-metal paste area 2 of the experimental sample obtained in step 3 respectively, and obtain the average PL intensity value PL of the metal paste area 1 of the experimental sample 金属 and the average PL intensi...

Embodiment 2

[0037] This embodiment provides a method for quickly judging the burn-through depth of metal paste without damage, such as figure 1 shown, including the following steps:

[0038] Step 1: Take the cleaned N-type silicon wafer as the substrate;

[0039] Step 2: growing a passivation film on the surface of the substrate, the passivation film is a SiN passivation film, the total thickness of the passivation film is 200nm, and the sample to be processed is obtained;

[0040] Step 3: Coating the metal paste on one side of the sample to be treated obtained in Step 2, and then sintering, the sintering temperature is 800°C, to obtain the experimental sample;

[0041] Step 4: Use the PL tester to collect the PL intensity values ​​of the metal paste area 1 and non-metal paste area 2 of the experimental sample obtained in step 3 respectively, and obtain the average PL intensity value PL of the metal paste area 1 of the experimental sample 金属 and the average PL intensity value PL of the ...

Embodiment 3

[0044] This embodiment provides a method for quickly judging the burn-through depth of metal paste without damage, such as figure 1 shown, including the following steps:

[0045] Step 1: Take the cleaned N-type silicon wafer as the substrate;

[0046] Step 2: grow a passivation film on the surface of the substrate, the passivation film is SiO 2 / SiN double-layer passivation film, the total thickness of the passivation film is 200nm, and the sample to be processed is obtained;

[0047] Step 3: Coating the metal paste on one side of the sample to be treated obtained in Step 2, and then sintering, the sintering temperature is 800°C, to obtain the experimental sample;

[0048] Step 4: Use the PL tester to collect the PL intensity values ​​of the metal paste area 1 and non-metal paste area 2 of the experimental sample obtained in step 3 respectively, and obtain the average PL intensity value PL of the metal paste area 1 of the experimental sample 金属 and the average PL intensity ...

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Abstract

The invention belongs to the technical field of solar cell testing, and particularly relates to a method for quickly determining the burn-through depth of metal slurry without damage. The method sequentially comprises the following steps: respectively acquiring PL strength values of a metal slurry region and a non-metal slurry region of an experimental sample by using a PL tester; and performing calculating to obtain an effective PL intensity value. According to the invention, the photoluminescence spectrum technology is utilized, and the pL numerical values of the metal slurry area and the non-metal slurry area are collected, and then an effective PL strength value capable of directly representing the metal slurry burn-through depth is calculated through a certain calculation method, so the burn-through depth of metal slurry is determined. The detection method is simple and convenient, is suitable for problem search in industrial production, does not cause the damage to the battery inthe process of determining the burn-through depth of the metal slurry, and can determine the burn-through depth of the metal slurry without damage.

Description

technical field [0001] The invention belongs to the technical field of solar cell testing, in particular to a method for quickly judging the burn-through depth of metal paste without damage. Background technique [0002] With the rapid development of photovoltaic technology, the pursuit of battery cost and efficiency is becoming more and more intense. For battery efficiency, the most important factor is recombination. Recombination includes interface defect recombination, base region defect recombination and recombination caused by metal paste. The effects of interfacial defect recombination and base defect recombination are usually tested by making samples with special structures. The recombination evaluation brought by metal paste is much more complicated. It is necessary to use chemical reagents, such as dangerous mixed acid solutions such as aqua regia, to Metal removal, or observe the burn-through depth and corrosion area under a high-power microscope, or make a sampl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L21/66G01N21/63
CPCH01L22/12G01N21/63
Inventor 崔艳峰袁声召万义茂
Owner 东方日升(江苏)新能源有限公司