Creation of bilateral structures of macroporous silicon with nanocoatings for solar cells

L. A. Karachevtseva; M. T. Kartel; Wang Bo; O. O. Lytvynenko; M. I. Karas; V. F. Onyshchenko

doi:10.15407/hftp12.02.090

Authors

L. A. Karachevtseva V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine / Ningbo University of Technology
M. T. Kartel Ningbo University of Technology
Wang Bo Ningbo University of Technology
O. O. Lytvynenko V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine
M. I. Karas V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine
V. F. Onyshchenko V. Lashkaryov Institute of Semiconductor Physics of National Academy of Sciences of Ukraine

DOI:

https://doi.org/10.15407/hftp12.02.090

Keywords:

macroporous silicon, nanocoatings, bilateral structures, solar cell technology

Abstract

We have proposed a new technological solution for the creation of solar energy elements using bilateral structures of macroporous silicon to increase the overall efficiency of converting light energy into electricity. Recently, the research on R&D in solar cell technology has focused mainly on crystalline silicon technologies and photovoltaic systems, including organic ones. The main physical phenomenon that determines the prospects of two-dimensional structures of macroporous silicon with nanocoatings as solar cells is the increase in absorption of electromagnetic radiation and photoconductivity as a result of interaction of optical modes with the developed surface of cylindrical macropores with a barrier on the nanocoating-surface boundary. We fabricated two-sided macroporous silicon structures with nanocoatings for solar cells, including silicon technology, organic nanoformations, and photovoltaic system formation. Silicon is a promising material for the manufacture of structures with a cylindrical geometry of air macropores due to the anisotropy of the cheap process of photoelectrochemical etching. The presence of periodically located cylindrical pores separated by silicon columns provides a large effective surface of the samples and enhanced optical and photophysical characteristics of silicon structures. Polymer composites with nanocoatings with CdS nanocrystals and multilayer carbon nanotubes in polyethyleneimine generate charges of opposite sign on both surfaces of the structures under illumination. The formation of bilateral structures of macroporous silicon with nanocoatings increases the overall energy conversion efficiency in solar cells by up to 60 %. In addition, one can use our proposed solar cells in the upper atmosphere.

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