Organic adhesive for back surface field aluminum paste of double-sided PERC battery and preparation method of organic adhesive

• Main Authors: MAO YIQIANG, LIANG JIALE, XU JIN
• Format: Patent
• Language: Chinese; English
• Published: 03.01.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CONDUCTORS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES; SEMICONDUCTOR DEVICES

The invention discloses an organic adhesive for double-sided PERC battery back surface field aluminum paste and a preparation method of the organic adhesive, and belongs to the technical field of solar battery back surface paste preparation. The organic adhesive disclosed by the invention is prepared from the following components in percentage by mass: 5 to 10 percent of ethyl cellulose, 1 to 5 percent of polyvinyl acetal, 1 to 2 percent of modified thixotropic agent and 83 to 93 percent of organic solvent. The prepared organic adhesive carrier is applied to double-sided PERC aluminum paste, the printing performance of the paste on a large-size silicon wafer and a high-speed printing process is good, and the adhesion of an aluminum grid line is high after drying. 本发明公开了一种双面PERC电池背场铝浆用有机粘合剂及其制备方法，属于太阳能电池背面浆料制备技术领域。本发明所述有机粘合剂，按质量百分比计，所述有机粘合剂包括如下组分：乙基纤维素5～10％、聚乙烯醇缩乙醛1～5％、改性触变剂1～2％、有机溶剂83～93％。本发明制备的有机粘合剂载体，应用于双面PERC铝浆，在大尺寸硅片，高速印刷工艺上浆料印刷性能好，烘干后铝栅线粘附性强。