Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of passive emitter solar cell front silver paste

A technology of solar cells and passivated emitters, applied in photovoltaic power generation, circuits, electrical components, etc., can solve the problems of passivation layer damage, insufficient low-temperature sintering window, limiting the efficiency potential of PERC cells, etc., to widen the sintering window, The effect of good low temperature sintering characteristics

Active Publication Date: 2018-12-14
JIANGSU RUIDE NEW ENERGY TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Industry practice shows that although the front silver paste used for conventional batteries can meet the basic use effect of PERC batteries, because the sintering window is generally biased toward high temperature, the low-temperature sintering window is not wide enough, which will cause damage to the passivation layer. Underperforming, limiting the efficiency potential of PERC cells

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of passive emitter solar cell front silver paste
  • A kind of passive emitter solar cell front silver paste
  • A kind of passive emitter solar cell front silver paste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In the embodiment 1, the inorganic binder is the disclosed inorganic binder (PbO78%, SiO 2 10%, Al 2 o 3 2%, MgO 1%, ZnO 9%); wherein the organic solvent in the organic vehicle is diethylene glycol ethyl ether acetate, and the weight percentage of the organic solvent in the organic vehicle is 85%, does not include surfactant and rheological agent.

[0025] The specific surface area of ​​embodiment 1 silver powder is 1~2m 2 / g; tap density 2.5~3.5g / cm 3 . The silver powder has a conventional particle size of 0.2-1.7 μm; the thickener is alkyd resin, and the sintering accelerator is sodium hexafluoroantimonate.

[0026] Embodiment 2-5 inorganic binding agent is PbO5%, Bi 2 o 3 50%, B 2 o 3 20%, SiO 2 14%, Al 2 o 3 3%, ZnO1%, CaO7%.

Embodiment 6

[0027] Embodiment 6 component is the same as embodiment 5, and difference only is that the composition of inorganic binder is: PbO0.5%, Bi 2 o 3 80%, B 2 o 3 5%, SiO 2 5%, Al 2 o 3 3%, ZnO2%, CaO4.5%;

Embodiment 7

[0028] The component of embodiment 7 is the same as that of embodiment 5, and the only difference is that the composition of the inorganic binder is: PbO2%, Bi 2 o 3 55%, B 2 o 3 10%, SiO 2 14%, Al 2 o 3 5%, ZnO6%, CaO8%.

[0029] By adjusting the weight percentage of the components of the inorganic binder, the sintering peak temperature changes accordingly.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
densityaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses positive side silver slurry for a passivation emitter electrode solar cell. The main components of the positive side silver slurry include organic carrier, an inorganic binder, silver powder and sintering promoter, wherein the organic carrier contains organic solvent, thickening agent and other auxiliary agents, the sintering promoter is sodium hexafluoroantimonate, and the inorganic binder contains calcium oxide. The positive side silver slurry is formed by adjusting inorganic binder, the inorganic binder is low in activity, the reaction between the inorganic binder and a passive film is reduced, and lots of composite centers formed on the contact portion between the silver slurry and a silicon chip can be prevented. The sintering peak value temperature of the inorganic binder is relatively low, and reaction between the inorganic binder and passive film under high temperature conditions is enhanced. Sintering promoter is added in the positive side silver slurry to lower and expand the sintering window. Excellent contact performance under relatively low sintering temperature is ensured, and better low temperature sintering properties are displayed.

Description

technical field [0001] The invention relates to the technical field of electronic paste, in particular to a front silver paste of a passivated emitter solar cell. Background technique [0002] PERC solar cells are passivated emitter backside contact cells. The characteristics of the cells are: (1) Passivation films are deposited on both sides of the cells. The passivation films have dual functions of anti-reflection and increasing red light, and reduce the current carrying (2) Grooves are made on the back dielectric layer by laser technology to expose the linear or dot-shaped silicon substrate, and the aluminum paste of the back field is directly covered on the back passivation film to form a local silicon substrate. touch. According to the structural characteristics of the PERC battery, the battery needs double-sided passivation and local contact on the back, so as to greatly reduce the surface recombination and improve the conversion efficiency of the battery. [0003] I...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/22H01L31/0224
CPCH01B1/22H01L31/022441Y02E10/50
Inventor 戈士勇
Owner JIANGSU RUIDE NEW ENERGY TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com