Valery Yerokhov

• Professional Doctorate in Engineering (PDEng) at Lviv Polytechnic,Ukraine, Lviv

When using nanoporous silicon (nano-PSi) as a texture and anti-reflective coating, the nanoporous layer is formed directly on the silicon surface of the front layer of solar cells (SC). Along with blooming, it must also provide passivation of the SC surface. Research in this area has shown that the passivating properties of PSi are insufficient to...

Purpose. Texturing of the silicon surface, both by chemical and electrochemical etching, is an integral part of the technology of modern high-performance silicon solar cells. The texture on the front surface of the solar cells not only reduces reflection losses, but also helps to capture long-wave light in the SC structure, thereby expanding its op...

In this study, to obtain frontal functional nanolayers of solar cells, an analysis of existing models of PSi was made. In order to achieve a low integral reflection coefficient of a textured Si surface, which can be further used as an efficient anti-reflective coating, a number of experiments were performed to establish the influence of technologic...

Experimental results on application of metal-assisted chemical etching (MACE) method for fabricating different morphologies on the surface of Si wafer, and the comparison of their optical properties in terms to develop structures with low reflectivity and high light absorption are presented. In order to obtain efficient anti-reflecting surfaces, Si...

Background. Application of the silicon-based porous textures as an efficient and commercially viable coating has to be maximally adapted to processes of the silicon solar cell manufacturing. To improve the antireflective property of Si frontal surface it is desirable to use methods allowing simultaneous changing of the value of refraction coefficie...

World photovoltaics is one of the most promising sectors of modern industry, rapidly developing, which in recent years has experienced one of the large increases in the production of electricity. Prices for traditional energy sources are constantly growing, due to the growth of the world population, intensive growth of consumption of industrial pro...

Here we demonstrate the prospects of creating a solar cells using the hybrid technologies of obtaining multifunctional multitextures of porous silicon (PS) to the frontal surface. We conducted analysis of the existing models of PSand selected the models, most suitable for the creation of microtexture. We theoretically examined the relationship betw...

The paper describes the prospects of preparing an antireflective coating based on porous silicon by electrochemical and chemical methods for photovoltaic converters with improved parameters. Application of the silicon-based porous textures as an efficient and commercially viable coating has to be maximally adapted to processes of the silicon solar...

The paper deals with obtaining of textured silicon surfaces by chemical etching. As a result of experiments based on the modification and optimization of obtaining a textured silicon, several methods of chemical texturing of the crystalline silicon surface were developed. It was shown that modified isotropic and anisotropic etching methods are appl...

Prospects for preparation of functional “Black Si” multi-layered anti-reflective coating (ARC) of the frontal surface by the electrochemical etching were shown. Both creation of geometrical model of the “Black Si” coating with discreet non-uniformity of a refraction coefficient and technological aspects of the “Black Si” type were described.

The paper describes a chemical etching technique as one of the promising methods to create Si nanostructures. The aim of this work is the development of Si photovoltaic converters using modern resourse-saving manufacturing methods for silicon micro- and nanostructures based on isotropic and anisotropic chemical etching techniques. It is shown that...

The paper deals with investigation of CVD grown silicon nanowires fabrication for antireflective coatings of photovoltaic cells.

ColloIDal dispersions and thin films containing poly-N-(epoxypropyl)carbazole (PEPK) and Ag—Au nanoparticles (2–3 nm in diameter) were prepared and investigated by TEM, optical and IR spectro-scopy, and electrophysical tools. The introduction of nanoparticles results in cooperative phenomena between the polymer and the Ag—Au particles; as a consequ...

The object of the present study is to develop profitable methods of isotropic texturing of silicon solar cells.

The tendency of transition to more cheaper silicons coating for silicon solar cells, from c-Si to FZ-Si and further to mc-Si, are observed the last 5 years. Reduction of optical losses in single- and multi-crystal silicon solar cells by texturing their surface is one of the most actual issues of modern silicon photovoltaics. Anisotropic chemical et...

The objective of the present study was to develop the multidimensional and multilayers macroporous crater-like surface for the cost-effective solar cells, which is easily possible to realize by chemical and electrochemical etching. A mathematical model of the macroporous silicon of the real layer was realized, to develop the technology of chemical...

For porous silicon (PS) layer preparation, only the electrochemical method of DC- anodizing in HF-based electrolytes and the chemical method using HF/HNO3 electrolytes are widely used. In solar cell applications, the former possesses major disadvantages, such as the need for a rear contact (a metal or high conductivity diffused layer) and for other...

The purpose of the present paper was technology development of generation of efficient and cost-effective porous silicon (PS) based antireflection coating (ARC), which would be the best adapted to the silicon solar cell (SC) processing sequence. Owing to optimisation of anodisation process conditions an average reflection coefficient of PS in the r...

Porous silicon, which is being obtained by electrochemical etching of silicon wafers in electrolytes on the base of hydrofluoric acid, recently attracted the attention of specialists in photovoltaics even more due to a number of its unique properties. However, at present, acceptable results are obtained for the use of porous silicon as antireflecti...

A new method of improvement of efficiency of silicon solar cells (SC) with structure of Al/tunneling thin SiOx/p-Si with induced inversion layer (MIS/IL) during their operation in solar modules structure has been presented. The method proposes modification of joining of the SC into modules as well as their photovoltaic properties improvement by mea...

A theoretical evaluation of the photoelectric properties of a metal-insulator-semiconductor structure with induced inversion layer (MIS/IL) like the Al/tunnel SiOx/p-Si structure by using of an external bias. The MIS/IL structure with a special inversion grid is considered. A back bias is applied between substrate and metal inversion grid. It inves...

Porous silicon (por-Si), which is being obtained by electrochemical etching of single crystalline silicon in electrolytes on the base of hydrofluoric acid, recently attracts the attention of specialists in photovoltaics even more due-to a number of its unique properties. However, at present, acceptable results are obtained only for the use of por-S...

A theoretical evaluation of the photoelectric properties of a metal–insulator–semiconductor with induced inversion layer (MIS/IL) like the Al/tunnel-oxide/p-Si structure by using an external electric bias is given. In particular a MIS/IL structure with a special inversion grid and with a back bias applied between substrate and metal inversion grid...