P-type silicon heterojunction solar cell

Abstract

Use: The utility model relates to the field of semiconductor electronics and solar energy, in particular to silicon-based photovoltaic converters designed to convert solar radiation into electrical energy, and can be used in solar batteries, photovoltaic modules, autonomous and network power supply systems, as well as in power plants for various purposes. Objective: to increase the efficiency of converting solar energy into electrical energy by reducing the series resistance of a heterojunction silicon solar cell based on p-type silicon and improving the conditions for the transport of charge carriers through the heterojunction region. The essence of the utility model: a heterojunction silicon solar cell contains a silicon substrate with p-type conductivity, a heterojunction semiconductor layer, a transparent conductive layer, a front current collector contact, a rear contact, and an internal thin layer made of amorphous silicon with a thickness of 1–10 nm. The inner thin layer is located directly between the p-type silicon substrate and the heterojunction semiconductor layer and is designed as a transition interlayer element, providing a reduction in the series resistance of the solar cell, a decrease in recombination losses and an improvement in the conditions for the transfer of charge carriers through the heterojunction region. In a specific embodiment, the inner thin layer can be formed by vacuum magnetron sputtering followed by rapid heat treatment. The technical result: reduced solar cell series resistance, reduced recombination losses, improved charge carrier transport across the heterojunction region, and increased efficiency and stability of the photovoltaic converter's electrical characteristics.