Etching-technology-based silicon science (SIS) junction solar cell

Abstract

The invention discloses an etching-technology-based silicon science (SIS) junction solar cell, which comprises a lower electrode (10), a light absorption material layer (20), an oxide insulating layer (30), a total cost of ownership (TCO) thin-film layer (40), an upper pattern electrode (50) and nanoparticles (60), wherein the light absorption material layer (20) is prepared on the lower electrode (10); due to the etching technology, a micron-scale one-dimensional bar structure or two-dimensional columnar structure which has different periods and depths is prepared on the light absorption material layer (20); the oxide insulating layer (30) is formed by oxidizing the light absorption material layer (20) through a chemical method; the TCO thin-film layer (40) is deposited on the oxide insulating layer (30); the upper pattern electrode (50) is prepared on the TCO thin-film layer (40); and the nanoparticles (60) are arranged on the TCO thin-film layer (40). The problem that the conventional SIS junction solar cell has low conversion efficiency is solved, and the aim of improving the capacities of optical absorption of the cell and carrier extraction is fulfilled.

Description

technical field [0001] The invention relates to the technical field of semiconductor photovoltaic devices, in particular to an SIS (semiconductor-insulator-semiconductor) junction solar cell based on etching technology. Background technique [0002] Solar cells can directly convert sunlight energy into electrical energy and solve the current energy crisis facing the world. Therefore, the construction of low-cost, high-efficiency solar cells has become the focus of research in the photovoltaic industry at home and abroad. At present, semiconductor solar cells with single or multiple PN junction structures have been widely used in technical fields such as aerospace, military affairs, satellites, landscape lighting and household electricity. [0003] Solar cells take advantage of the photovoltaic effect of materials, the phenomenon in which a device generates a voltage when exposed to light. Currently commonly used solar cells are mostly made of semiconductor materials, using ...

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Problems solved by technology

[0007] In view of this, the main purpose of the present invention is to provide a SIS junction solar cell based on etching technology to solve the problem of low conversion efficiency of the current SIS junction solar cell and achieve the purpose of improving the optical absorption and carrier extraction capabilities of the cell

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