Front surface texture formation of the solar cell by the porous silicon technology
DOI:
https://doi.org/10.15587/1729-4061.2015.36754Keywords:
porous silicon, texture, electrochemical etching, solar cell, photovoltaic converterAbstract
The prospects of forming textures of different formats by electrochemical porous silicon technologies for obtaining front functional layers of solar cells are shown. Creating a schematic model of different types of porous silicon for textures depending on the current form has allowed to simulate the experimental process of texture formation. In the pore formation process, one of the most important characteristics is current density distribution, which depends on many parameters and affects the porous silicon element type formation. With the increase and distribution of current density on the pore bottom surface, we obtain the usual bell-shaped kind of pores. By applying zigzag mode to the bell-shaped current, we can get two-layer porous silicon, where macroporous silicon can be filled or partially filled with microporous silicon. Thus, coral-like, columnar and drop-shaped textures based on porous silicon as an element of an effective and profitable coverage were experimentally obtained. The texture formation process should be the best adapted to the processes of formation of silicon solar cells. Analysis of integrated reflection coefficients in the range of 400 nm - 1000 nm for textures with columnar and drop-shaped pores shows their high efficiency compared with other textures, especially in the infrared.
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Copyright (c) 2015 Анатолій Олександрович Дружинін, Валерій Юрійович Єрохов, Ольга Валерієвна Єрохова
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