Growth, crystal structure and theoretical studies of energy and optical properties of CdTe1−xSex thin films

Kashuba, A. I.; Ільчук, Г. А.; Petrus, R. Yu.; Andriyevsky, B.; Semkiv, І. V.; Zmiyovska, E. O.

doi:10.1007/s13204-020-01635-0

Cited by 10 publications

(3 citation statements)

References 49 publications

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“…One more method of the bandgap determination is based on the analysis of the absorption spectrum of a film at the long-wavelength edge of fundamental absorption [7]. Here, the spectral dependence of the optical absorption of CdTe thin film in the (ahν) 2 vs hν (a is the absorption coefficient and hν is the photon energy) coordinates (see fig.…”

Section: Resultsmentioning

confidence: 99%

Optical properties of CdTe thin film obtained by high-frequency magnetron sputtering method

Kashuba

Andriyevsky

Ільчук

et al. 2021

Journal of the Belarusian State University. Physics

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Cadmium telluride (CdTe) thin films relate to AII BVI compounds and show semiconductor behaviour. They present an important research field because of their wide application in various optoelectronic devices. CdTe-based solar cells attract attention since CdTe is characterised by the direct energy bandgap Eg and high absorbance, which makes it an excellent light-absorbing layer of solar cells. Material evaporation in vacuum by using the high-frequency magnetron sputtering method is one of the most advantageous methods for obtaining uniform films. The present work is dedicated to the investigation of the optical properties of CdTe thin film, which is produced on quarts substrate by the high-frequency magnetro sputtering method. The optical transmission, reflectivity, and μ-Raman spectra of the CdTe thin film have been determined. Linearity of the spectral dependence of the coefficient of optical absorption α of CdTe thin film in the coordinates (αhν)2 vs hν indicates for the direct character of optical transitions corresponding to the long-wavelength edge of fundamental absorption. The optical bandgap of the studied CdTe thin film is found to be Eg = 1.53 eV. The peaks of the experimental m-Raman spectra at 121; 139; 142; 167 and 331 cm–1 are attributed to the phonons in crystalline CdTe and Te.

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Section: Resultsmentioning

confidence: 99%

Optical properties of CdTe thin film obtained by high-frequency magnetron sputtering method

Kashuba

Andriyevsky

Ільчук

et al. 2021

Journal of the Belarusian State University. Physics

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“…Deposition methods play a critical role in the performance of the solar cells. In CdTe based solar cells, the CSS method has been intensively preferred recently [20][21][22]. However, evaporation method in vacuum allows more precise control of the thin Cd(Se,Te) layer and the roughness of the films compared to commonly used CSS and promises high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Impact of CdSeTe and CdSe film deposition parameter on the properties of CdSeTe/CdTe absorber structure for solar cell applications

Çiriş,

Atasoy,

Tomakin

et al. 2024

Semicond. Sci. Technol.

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In this study, the effect of depositing CdSeTe and CdTe layers at different substrate temperatures by evaporation in vacuum on the properties of the CdSeTe/CdTe stacks was investigated. First, CdSeTe layers in stack structure were grown at substrate temperatures of 150, 200 and 250°C and then CdTe layers on the CdSeTe produced with the optimum temperature were coated at substrate temperatures of 150, 200 and 250°C. The employing of substrate temperatures up to 150°C on both CdSeTe and CdTe films in CdSeTe/CdTe stacks demonstrated the presence of Te and/or oxide phases as well as the alloying, while more stable phase structures at higher temperatures. In the CdSeTe/CdTe stack, the increase in substrate temperature of CdSeTe promoted the alloying, while it weakened the alloy in which was applied in CdTe. It was concluded that under the applied experimental conditions, substrate temperatures of 250°C and 200°C with the graded alloying structure, suitable absorption sites, more homogeneous surface morphology for potential solar cell applications would be more suitable for CdSeTe and CdTe, respectively. As a result, the application of substrate temperature to CdSeTe or CdTe in the stacks can be used as a tool to control the properties of the stack structure.

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“…II-VI semiconductor group has potential applications in solar cell, light-emitting diodes and efficient thin film transistors [4]. Among thin-film systems, heterostructures of the CIS type [5][6], CIGS [7], CdTebased materials [8][9][10] have become the most effective. The expected effectiveness of the latter, in particular, reaches 28-30 % [11].…”

Section: Introductionmentioning

confidence: 99%

First-Principles Calculations of Stable Geometric Configuration and Thermodynamic Parameters of Cadmium Sulfide Thin-Film Condensates

Oleksyn

Naidych

Chernikova

et al. 2021

Phys. Chem. Solid St.

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Thin-film CdS layers obtained by the open evaporation method in vacuum are considered and cluster models for calculation of crystal, band structure and thermodynamic parameters are proposed. The thermodynamic parameters of the formation energy ΔE, enthalpy of formation ΔH, Gibbs energy ΔG, entropy ΔS and specific heat capacities at constant pressure and volume for cubic and hexagonal crystallographic modifications are determined. The stable crystal structure for cadmium sulfide was determined from the analysis of Gibbs energy temperature dependences for the sphalerite and wurtzine phases.

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Growth, crystal structure and theoretical studies of energy and optical properties of CdTe1−xSex thin films

Cited by 10 publications

References 49 publications

Optical properties of CdTe thin film obtained by high-frequency magnetron sputtering method

Optical properties of CdTe thin film obtained by high-frequency magnetron sputtering method

Impact of CdSeTe and CdSe film deposition parameter on the properties of CdSeTe/CdTe absorber structure for solar cell applications

First-Principles Calculations of Stable Geometric Configuration and Thermodynamic Parameters of Cadmium Sulfide Thin-Film Condensates

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