Back contacted solar cell

Abstract

This invention relates to a cost effective method of producing a back contacted silicon solar cell and the cell made by the method, where the method comprises applying a silicon substrate, wafer or thin film, doped on the back side with alternating P-type and N-type conductivity in an interdigitated pattern and optionally a layer of either P- or N-type on the front side of the wafer, depositing one or more surface passivation layers on both sides of the substrate, creating openings in the surface passivation layers on the back side of the substrate, depositing a metallic layer covering the entire back side and which fills the openings in the surface passivation layers, and creating openings in the deposited metallic layer such that electric insulated contacts with the doped regions on the back side of the substrate is obtained.

Description

technical field [0001] The present invention relates to a cost-effective method of manufacturing back-contact silicon solar cells and cells produced by the method. Background technique [0002] The world's oil supply is expected to gradually deplete over the next few decades. This means that our primary energy source of the last century will have to be replaced within a few decades to ensure current energy consumption and future increases in global energy demand. [0003] In addition, much concern has been raised that the use of fossil energy is increasing the global warming effect to such an extent that it may become dangerous. Thus, the current consumption of fossil fuels should preferably be replaced by energy sources / carriers that are renewable and sustain our climate and environment. [0004] One such source of energy is sunlight, which strikes the Earth with an energy far greater than the current and any foreseeable increase in human energy consumption. However, sol...

AI Technical Summary

Problems solved by technology

However, solar cell electricity has until now been too expensive to compete with nuclear, thermal, etc.

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