Aging-resistant low-temperature curing type back surface silver slurry for total-aluminum back field crystalline silica solar cell

• Main Authors: GENG XINTONG, MIN YUQIN, ZHANG QUN, YANG QUANRONG, LENG QINGSONG
• Format: Patent
• Language: Chinese; English
• Published: 26.02.2019
• 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 provides an aging-resistant low-temperature curing type back surface silver slurry for a total-aluminum back field crystalline silica solar cell. The silver slurry is composed of the following components by weight: 5-15 parts of spherical silver powder; 0-5 parts of spherical tin powder; 50-60 parts of sheet-shaped silver powder; 0-5 parts of bisphenol A-type epoxy resin; 5-8 parts of hydrogenated bisphenol A-type epoxy resin; 3-10 parts of alicyclic epoxy resin; 11.6-20.5 parts of liquid anhydride curing agent; 0.02-0.1 part of curing accelerator; 0-0.08 part of processing auxiliary agent; and 0.2-0.5 part of thixotropic auxiliary agent. The average initial conversion efficiency of the crystalline silica solar cell plate which is prepared by the back surface silver slurry isabove 20.60%, and the initial welding adhesion force is above 5.7N/mm. The reduction rate of photoelectric conversion efficiency and the welding adhesion force of the cell plate are less than 5% thanthe initial values. The a