Solar cell back face silver paste and preparing method thereof

The invention discloses a solar cell back face silver paste and a preparing method thereof. The silver paste is used for producing back face electrodes of a solar cell. The silver paste comprises, by mass, 45-60% of electric conduction metal powder such as silver powder, copper powder, aluminum powd...

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Bibliographic Details
Main Authors ZHENG DASHOU, BU JIAWEI, ZENG KAI
Format Patent
LanguageEnglish
Published 29.04.2015
Subjects
BASIC ELECTRIC ELEMENTS
CABLES
CONDUCTORS
ELECTRICITY
INSULATORS
SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES
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Summary:The invention discloses a solar cell back face silver paste and a preparing method thereof. The silver paste is used for producing back face electrodes of a solar cell. The silver paste comprises, by mass, 45-60% of electric conduction metal powder such as silver powder, copper powder, aluminum powder and nickel powder, 31-46% of organic bond, 1-6% of lead-free bismuthate glass powder and 0-3wt% of additive. The preparing method of the silver paste comprises preparation of the lead-free bismuthate glass powder, preparation of the organic bond, preparation of the additive and the processing technology of the sizing agent. According to the prepared back face electrode silver paste containing the additive, silver layers are compact after the prepared back face electrode silver paste is sintered, makes very good ohmic contact with a silicon wafer and has low series resistance and excellent electrical conductivity, the adhesive force between the back face electrode and the silicon wafer is improved, and the photoelectric converting efficiency is high.
Bibliography:Application Number: CN2015129851