Peculiar optical properties of modified surface of monocrystalline cadmium telluride

Makhniy, V. P.; Slyotov, M. M.; Skrypnyk, N. V.

doi:10.3116/16091833/10/1/54/2009

Cited by 6 publications

(4 citation statements)

References 4 publications

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“…This behavior s corresponds to some experimental facts, according to which there is a difference in the values of the photoluminescence intensity Iph for different types of substrates, since one should take into account the value Iph, which in the first approximation is inversely proportional to the recombination rate surface. The experiments carried out in this work show that for the studied CdTe, CdTe:Li substrates, the photoluminescence intensity decreases by about three orders of magnitude [14,18].…”

Section: Resultsmentioning

confidence: 64%

Surface-Barrier CdTe Diodes for Photovoltaics

Mazur¹,

Mazur²,

Halushchak³

2023

J. Nano- Electron. Phys.

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In this paper, a comparative analysis of the use of semiconductor solar cells based on single-crystal, polycrystalline and amorphous silicon (Si), as well as cadmium telluride (CdTe) in the energy sector is carried out. It is shown that the advantages of thin-film technology and CdTe itself as a direct-gap semiconductor open the prospect of large-scale production of competitive CdTe solar modules (batteries). The technology of manufacturing substrates, applying indium ohmic contact to the plates, exposing some of the substrates to a number of additional treatments in an aqueous suspension of alkali metals, in particular Li -CdTe:Li and conducting research on them, as well as on chemically etched substrates that have not undergone any additional processing and conventionally designated CdTe. The possibilities of using devices based on single-crystal CdTe, which are called surface barrier diodes (SBDs), are being studied for converters. Technological advances that lead to changes in the physicochemical properties of single-crystal surfaces of n-CdTe substrates (their main optical, electrical, and photoelectric parameters, as well as the characteristics of metal-semiconductor contacts based on single-crystal cadmium telluride) are being discussed. Analyzing the properties of the research objects it should be noted that surface modification not only affects the potential barrier height but also significantly changes the course of electric and photoelectric processes, while the surface morphology of CdTe:Li substrates remains similar to unmodified ones, although the SBDs based on them are noticeably higher. It was also found that the rate of surface recombination of SBDs based on substrates with a surface nanostructure is two and one orders of magnitude lower than in structures based on basic substrates and alkali metal salts treated in suspension, respectively. The modification of substrates leads to an increase in the efficiency of solar cells (SCs), and the highest photoconversion efficiency is observed for SBDs based on substrates with a surface nanostructure and reaches 9 % at 300 K under AM2 illumination. The methods of using the technologies proposed in this work for the creation of surface-barrier photocells based on thin CdTe films are considered.

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Section: Resultsmentioning

confidence: 64%

Surface-Barrier CdTe Diodes for Photovoltaics

Mazur¹,

Mazur²,

Halushchak³

2023

J. Nano- Electron. Phys.

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“…To elucidate this question, the luminescence properties of samples with mirror surfaces and modified (quantum-size) surfaces were compared. We should point out that the modified surfaces substantially increase the efficiency of the edge radiation, 15 and this can be treated as a decrease of the surface-recombination rate. In this connection, it is logical to assume that the creation of a quantum-size surface in CdTe : Sn layers in principle must cause luminescence to appear.…”

Section: Discussion Of the Resultsmentioning

confidence: 99%

Luminescence of broad-band compounds of elements of groups II–VI with a tin impurity

2012

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This paper discusses the luminescence properties of films of cadmium and zinc chalcogenides obtained by the diffusion of tin from the vapor phase in a closed volume. It is established that the doping of ZnSe, CdS, and CdSe substrates increases the efficiency of the edge emission, while that of ZnTe causes it to disappear and causes a new band to appear in the energy region 1.8-2.1 eV. The absence of luminescence of CdTe : Sn films in the 0.6-1.6-eV range is explained by band corrugation.

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“…Various surface passivation methods can be applied to reduce this recombination velocity (s) by 1-2 orders of magnitude. These methods can be used for both single crystal and large-grain semiconductor films [38,44].…”

Section: Thin-film Heterostructures Based On Cdte In Solar Energymentioning

confidence: 99%

Solar cells based on CdTe thin films (Part II)

Mazur

Вакалюк

2023

Phys. Chem. Solid St.

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This paper discusses the use of semiconductor solar cells based on thin-film cadmium telluride (CdTe) in modern energy production. The advantages and disadvantages of using CdTe thin-film solar cells are analyzed, and arguments are presented in favor of the implementation of mass production technologies for CdTe solar modules, which can compete with silicon analogs in terms of compromise between efficiency and cost. The physical and chemical properties of the binary Cd-Te system are described, and the relationship between the physical, chemical, electrical, and optical properties of CdTe is analyzed, making it attractive for use in thin-film solar cells. Special attention is given to the investigation of photovoltaic properties, which are important parameters for determining photoconductivity, and the advantages and disadvantages of CdTe film photovoltaic properties are discussed. CdTe thin-film heterostructures (HSs), which are important components of modern solar cells, are considered, and their main advantages and disadvantages are described. It is argued that simple methods of manufacturing and forming HSs, which do not require complex and expensive equipment, are an important advantage of CdTe-based solar cell technology.

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Peculiar optical properties of modified surface of monocrystalline cadmium telluride

Cited by 6 publications

References 4 publications

Surface-Barrier CdTe Diodes for Photovoltaics

Surface-Barrier CdTe Diodes for Photovoltaics

Luminescence of broad-band compounds of elements of groups II–VI with a tin impurity

Solar cells based on CdTe thin films (Part II)

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