Low-temperature composite conductive silver paste for HJT solar cell and preparation method of low-temperature composite conductive silver paste

Abstract

The invention discloses low-temperature composite conductive silver paste for an HJT solar cell and a preparation method, and belongs to the technical field of conductive silver paste. The silver nanowires are doped into the flaky silver powder low-temperature conductive silver paste, the organic carrier and the conductive silver paste are prepared, the silver nanowires form a network structure between the flaky silver powder, the supply-price bond acting force of resin is increased, the silver paste adhesive force is achieved, and the compactness and tensile strength of a silver layer are improved. Meanwhile, a conductive network is formed in a printing and curing manner, and a conductive path is increased, so that free electrons can flow through the whole conductive system more easily, charge migration is reduced, the potential barrier of a polymer is overcome, and the resistivity of the whole system is reduced. According to the preparation method of the low-temperature composite conductive silver paste of the HJT solar cell, the conductivity is increased, the use amount of the flake silver powder is reduced, and the adhesive force of a silver film can be increased through a formed network.

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