PHOPHORUS PASTE FOR DIFFUSION AND PROCESS FOR PRODUCING SOLAR CELL UTILIZING THE PHOSPHORUS PASTE

摘要

DISCLOSED IS A PHOSPHORUS PASTE FOR DIFFUSION THAT IS USED IN CONTINUOUS PRINTING OF A PHOSPHORUS PASTE FOR DIFFUSION ON A SUBSTRATE BY SCREEN PRINTING. THE PHOSPHORUS PASTE FOR DIFFUSION DOES NOT UNDERGO A SIGNIFICANT INFLUENCE OF AMBIENT HUMIDITY ON VISCOSITY AND HAS NO POSSIBILITY OF THICKENING EVEN AFTER A LARGE NUMBER OF TIMES OF CONTINUOUS PRINTING. THE PHOSPHORUS PASTE FOR DIFFUSION IS COATED ON A SUBSTRATE BY SCREEN PRINTING FOR DIFFUSION LAYER FORMATION ON THE SUBSTRATE. THE PHOSPHORUS PASTE FOR DIFFUSION INCLUDES A DOPING AGENT CONTAINING PHOSPHORUS AS A DOPANT FOR THE DIFFUSION LAYER, A THIXOTROPIC AGENT CONTAINING AN ORGANIC BINDER AND A SOLID MATTER, AND AN ORGANIC SOLVENT. THE DOPING AGENT IS AN ORGANIC PHOSPHORUS COMPOUND.