Metal-semiconductor contact structure and preparation method therefor, solar cell, solar cell string and preparation method therefor, and photovoltaic module

Abstract

A metal-semiconductor contact structure is provided. The metal-semiconductor contact structure includes a doped silicon-based semiconductor layer and a metal electrode in contact with each other. A contact region between the doped silicon-based semiconductor layer and the metal electrode includes a first conductive region and a second conductive region. In the first conductive region, the metal electrode is recessed towards an inner direction of the doped silicon-based semiconductor layer to form a pit island, a silicon-based eutectic in conductive connection with the doped silicon-based semiconductor layer is provided in the pit island, and a conductive crystal in conductive connection with the silicon-based eutectic is provided. A conductive aggregate including a glass phase material and metal conductive particles is provided in the second conductive region, and the metal conductive particles have a same kind of the metal element as the conductive crystal.