Solar cells, modules, passivated contact structures and methods of manufacture and photovoltaic systems

Abstract

This disclosure provides a solar cell, module, passivated contact structure, fabrication method, and photovoltaic system. The solar cell passivated contact structure includes a first barrier layer, a gallium-doped silicon material layer, a second barrier layer, and a boron-doped silicon material layer sequentially stacked on a silicon substrate. The gallium-doped silicon material layer ensures minimal Ga diffusion within the silicon substrate under the first barrier layer, thereby guaranteeing a high passivation level. The boron-doped silicon material layer incorporates a small amount of boron after passing through the second barrier layer, extending to the side adjacent to the second barrier layer without entering the first barrier layer or the silicon substrate, thus preventing passivation from being affected by boron. The boron-doped silicon material layer ensures low contact resistance with the metal electrode, ultimately achieving high passivation and low contact resistance, significantly improving cell conversion efficiency.

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