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PERC crystalline silicon solar cell main grid slurry and preparation method thereof

A technology for solar cells and paste, applied in the field of solar cells, can solve the problems of high requirements on busbar printability, high productivity, fast printing speed, etc., and achieve the effects of improving cell filling factor, reducing space charge recombination, and improving compactness.

Active Publication Date: 2021-11-02
ZHEJIANG GUANGDA ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the current cell printing machine has high production capacity and fast printing speed, and has high requirements for the printability of the main grid; at the same time, the main grid is printed before the auxiliary grid is printed, and the electrode There are also higher requirements for drying strength

Method used

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  • PERC crystalline silicon solar cell main grid slurry and preparation method thereof
  • PERC crystalline silicon solar cell main grid slurry and preparation method thereof
  • PERC crystalline silicon solar cell main grid slurry and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: a kind of high reliability PERC crystalline silicon solar cell busbar conductive paste, the composition quality of described busbar conductive paste is such as Table 1:

[0022]

[0023]

[0024] Described glass powder composition is respectively:

[0025] One mole fraction composition of glass powder is 0.1-0.3 parts of PbO, 0.01-0.1 parts of Li 2 O, 0.01~0.1 part of Al 2 o 3 , 0.01 to 0.2 parts of ZnO, 0.05 to 0.3 parts of TiO 2 , 0.35~0.55 parts of SiO 2 , 0~0.2 parts of TeO 2 , 0~0.1 part of CeO 2 , 0-0.1 part of La 2 O, 0.05-0.2 part of MnO 2 , 0.01 to 0.3 parts of CuO;

[0026] The average particle size of the conductive phase of silver powder is between 0.2-3um, and the tap density is 2.0-5.0g / cm3;

[0027] The production process of the conductive silver paste for the busbar electrode of the PERC crystalline silicon solar cell is as follows:

[0028] Step 1: Ethyl cellulose, butyl carbitol, lauryl alcohol ester, and organic additives...

Embodiment 1

[0032] Embodiment one test electric performance is as table two:

[0033] Table II

[0034] PASTE Uoc Isc Rs. Rsh FF Eff Pull / N ref 0.677 9.880 0.00123 28.85 80.32 0.2208 1.5 Embodiment one 0.678 9.872 0.00138 111.18 80.36 0.2211 2.0

Embodiment 2

[0035] Embodiment 2: A kind of high reliability PERC crystalline silicon solar cell busbar conductive paste, the composition quality of described busbar conductive paste is such as Table 3:

[0036] Table three

[0037] Embodiment two glass powder 1.60％ silver powder 86.40％ Butyl Carbitol 2.90％ lauryl alcohol ester 2.70％ Butyl Carbitol Acetate 2.50％ Ethyl cellulose 1.50％ Organic additives 2.40％

[0038] Described glass powder composition is respectively:

[0039] The mole fraction composition of the glass powder is 0.1-0.3 parts of PbO, 0.01-0.1 parts of Bi 2 o 3 , 0.1 to 0.3 parts of Al 2 o 3 , 0.05 to 0.3 parts of TiO 2 , 0.01 to 0.2 parts of ZnO, 0.35 to 0.55 parts of SiO 2 , 0~0.1 WO 2 , 0~0.2 parts of TeO 2 , 0~0.1 part of CeO 2 , 0-0.1 part of La 2 O0.05~0.2 parts of MnO 2 , 0.01-0.3 parts of CuO; the average particle size of the silver powder conductive phase is between 0.2-3um, and the tap density is ...

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Abstract

The invention discloses PERC crystalline silicon solar cell main grid slurry and a preparation method thereof. The PERC crystalline silicon solar cell main grid slurry comprises the following components: 1 to 5 parts by mass of a glass powder, 70 to 90 parts by mass of a silver powder, 0.5 to 3 parts by mass of ethyl cellulose, 0.5 to 5 parts by mass of butyl carbitol, 0.2 to 5 parts by mass of dodecanol ester, 1 to 5 parts by mass of butyl carbitol acetate, and the balance of organic auxiliary agents. The method is simple to operate and easy to implement, the compactness of an electrode conductive network can be improved by the prepared silver electrode sintered by the main grid electrode silver slurry, the damage to silicon nitride is reduced, the filling factor of the battery is improved, and the comprehensive performance of the PERC battery is further improved. The method is simple to operate and easy to implement, the compactness of an electrode conductive network can be improved by the prepared silver electrode sintered by the main grid electrode silver slurry, the damage to silicon nitride is reduced, the filling factor of the battery is improved, and the comprehensive performance of the PERC battery is further improved.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a PERC crystalline silicon solar cell busbar paste and a preparation method thereof. Background technique [0002] PERC (Passivated Emitter and Rear Cell), that is, passivated emitter and rear cell technology, was first proposed by Australian scientist Martin Green in 1983, and is currently becoming a new generation of conventional technology for solar cells. PERC technology improves conversion efficiency by adding a passivation layer on the back of the cell. The PERC cell structure is as follows figure 1 shown. Generally speaking, the front busbar paste is printed on the front of the battery as the serial welding electrode to collect carriers. It is required that the paste has a weak reaction with SiNx and less damage to the battery structure. After sintering, the electrode is non-contact with Si and has a wide welding window. [0003] In order to maximize the battery efficiency ga...

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 谢继峰高荣泰许吉林唐元勋肖强陈卫龙
Owner ZHEJIANG GUANGDA ELECTRONICS TECH
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