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Glass composition for front silver paste of crystalline silicon solar perc cell and preparation method thereof

A glass composition and solar energy technology, which is applied in the field of glass for silver paste on the front side of crystalline silicon solar cells, can solve the problems of shortened component life, low electrode adhesion, and low production capacity, and achieve good applicability and solve functional requirements.

Active Publication Date: 2022-04-15
ZHEJIANG GUANGDA ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are two kinds of aluminum oxide coating processes. One is to grow aluminum oxide film by atomic layer deposition (ALD). The main problems are: low production capacity and frontal diffraction problem.
However, in the case of low heating temperature, it is easy to cause low adhesion of the electrode, and the mechanical strength of the cell at the component end is not enough, which may shorten the life of the component.

Method used

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  • Glass composition for front silver paste of crystalline silicon solar perc cell and preparation method thereof
  • Glass composition for front silver paste of crystalline silicon solar perc cell and preparation method thereof

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preparation example Construction

[0058] Another object of the present invention is to provide a method for preparing the glass composition for front silver paste of silicon solar PERC cells, comprising: uniformly mixing according to the predetermined ratio to obtain mixed raw materials, putting the mixed raw materials into a platinum crucible, and then Put the platinum crucible into a high-temperature box furnace to heat up, and keep it warm at a temperature of 1100-1300°C for 0.5-1 hour, so that the melt completely becomes a homogeneous liquid and does not contain any residual raw material decomposition products; The homogeneous liquid is poured into deionized water for water quenching, and the glass particles are taken out after cooling, and put into a blast oven for drying; the dried glass particles, grinding balls, and deionized water are put into a ball mill jar And seal it, put it into a ball mill for ball milling, and after ball milling for 2-5 hours, sieve and filter out the balls to obtain glass slurr...

Embodiment 1-6

[0069] For the silver paste glass composition on the front side of crystalline silicon solar PERC cells, the formula of lead-free glass (a) is according to No. 1-6 formula in Table 1, and the lead-containing glass (b) is according to No. 7-12 formula in Table 2, after After components adjustment, melting, water quenching, drying, ball milling, sieving and other processes, a glass composition with low softening temperature, high adhesion and low RS after sintering of silver paste on the front side of crystalline silicon solar PERC cells is obtained. The glass composition in the formula also includes 0.01-5wt% of additives; the additives are selected from the group consisting of: (1) metals, wherein the metals are selected from strontium, barium, titanium, zirconium, vanadium, niobium, Chromium, molybdenum, tungsten, manganese, iron, ruthenium, rhodium, cobalt, nickel, copper, tin, cerium and gadolinium; (ii) metal oxides of one or more metals selected from Strontium, barium, ti...

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Abstract

The invention discloses a front silver paste glass composition for crystalline silicon solar PERC cells and a preparation method thereof. The glass composition contains two types of glasses and one or more additives. 1) Lead-free glass; 2) Lead-containing glass. Exemplary additives may include metals, metal oxides, or any compound capable of forming these metal oxides upon firing. The glass composition of the present invention has good applicability to superimposed selective emitter process (SE process) PERC cells, and maintains the good open circuit voltage (VOC), contact resistance (Rs) and adhesion of SE process PERC cells, and can Effectively solve the functional requirements of the SE process PERC battery for the sintering window with a low firing temperature (730-760°C).

Description

technical field [0001] The invention relates to the technical field of glass for silver paste on the front side of crystalline silicon solar cells, and more specifically, the invention relates to a silver paste glass composition and a preparation method thereof for front side silver paste of crystalline silicon solar PERC cells stacked with selective emitter technology. 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's efficiency records have been continuously refreshed in recent years, and it will become the most cost-effective technology in the next three years. PERC technology increases conversion efficiency by adding a dielectric passivation layer on the rear side of the cell. Better efficiency levels in standard cell configurations are lim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/066C03C3/12
CPCC03C3/066C03C3/122
Inventor 谢继峰李京章卢波王勇林赛孟淑媛
Owner ZHEJIANG GUANGDA ELECTRONICS TECH
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