Glass composition for front silver paste of crystalline silicon solar double-side passivation PERC battery and preparation method thereof
A glass composition, double-sided passivation technology, applied to conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc. The problem of shortening the life of components, etc., achieves good applicability, solves the requirements for good electrical contact performance, and achieves the effect of good contact resistance.
Active Publication Date: 2019-09-20
ZHEJIANG GUANGDA ELECTRONICS TECH
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Problems solved by technology
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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Embodiment 1-6
[0046] For the front silver paste glass composition of crystalline silicon solar PERC cells, the formula of lead-free glass (a) is according to No. 1-4 formula in Table 1, and the lead-containing glass (b) is according to No. 5-9 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 the group consisting of 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,...
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Abstract
The invention discloses a glass composition for front silver paste of a crystalline silicon solar double-side passivation PERC battery and preparation method thereof. The glass composition comprises two types of glass, including 1) lead-free glass and 2) lead-containing glass, and one or more additives. Exemplary additives may include metals, metal oxides, or any compound capable of generating these metal oxides during firing. The glass composition disclosed by the invention has good applicability to a double-sided passivated PERC battery adopting a superposition selective emitter process (SE process); the problem that the contact resistance (Rs) of front silver paste is high due to a double-side passivation process is mainly solved. The functional requirements of an SE process double-side passivation PERC battery on a low-burning-temperature sintering window (730-770 DEG C) can be effectively satisfied, and meanwhile, good open-circuit voltage (VOC) and adhesive force of an SE process PERC battery piece are maintained.
Description
technical field [0001] The invention relates to a glass composition of silver paste on the front side of a solar cell, in particular to a glass composition used for double-sided passivation of silver paste on the front side of a PERC cell with crystalline silicon solar energy 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'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 limited by the tendency for photogenerated electrons to recombine...
Claims
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Login to View More IPC IPC(8): C03C3/066C03C3/12H01B1/16H01B13/00H01L31/0224
CPCC03C3/066C03C3/122H01B1/16H01B13/00H01L31/022433Y02E10/50
Inventor 谢继峰杨超卢波王勇林赛孟淑媛
Owner ZHEJIANG GUANGDA ELECTRONICS TECH