Influence of pH on the optical, structural and compositional properties of nanocrystalline CdSe thin films prepared by chemical bath deposition

Piryaei, Masoumeh; Hatam, Ebrahim Gholami; Ghobadi, Nader

doi:10.1007/s10854-016-5830-5

Cited by 10 publications

(2 citation statements)

References 14 publications

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“…Examination of the crystal lattice parameters of CdSe revealed the following values: a = 4.2116 Å and c = 6.8901 Å. It is worth noting that the amorphous character of the resulting CdSe films aligns well with existing literature data derived from experiments investigating the structural characteristics of films produced through electrochemical deposition [25,26]. Table 1 provides the results of evaluating the structural attributes of the examined films in relation to variations in their production conditions.…”

Section: Resultssupporting

confidence: 72%

Evaluation of the Applicability of Modifying CdSe Thin Films by the Addition of Cobalt and Nickel to Enhance the Efficiency of Photocatalytic Decomposition of Organic Dyes

Omarova,

Ayazbaev,

Yesdauletova

et al. 2023

J. Compos. Sci.

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This article presents the results of an assessment of the use of CdSe, NiCdSe, and CoCdSe thin films as a basis for photocatalysts used for the decomposition of the organic dyes rhodamine B, cargo red, and indigo carmine. Interest in this area was determined by the need to solve a number of issues related to increasing the efficiency purifying aqueous media from the negative effects of organic dyes, which cannot be disposed of using traditional methods associated with adsorption or filtration. The use of the electrochemical synthesis method to obtain thin films of a given thickness showed that the addition of nickel or cobalt sulfates to the standard electrolyte solution used to obtain CdSe films results in the formation of CdSe films with a higher degree of structural ordering (the crystallinity degree was more than 50%), as well as a decline in the band gap. When analyzing data on the photocatalytic decomposition of organic dyes, it was found that a change in the structure of the films due to the introduction of nickel and cobalt leads, in the case of the decomposition of the rhodamine B dye, to a more efficient decomposition, and in the case of the cargo red and indigo carmine dyes, not only to their complete decomposition and mineralization, but also to a reduction in the time of photocatalytic reactions (decomposition growth rate). Moreover, an analysis of cyclic tests demonstrated that NiCdSe and CoCdSe films maintain 90% of their photocatalytic decomposition efficiency compared to that achieved during the first decomposition cycle, while CdSe degrades after three consecutive cycles and its efficiency reduces by more than 2.5–3 times.

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Section: Resultssupporting

confidence: 72%

Evaluation of the Applicability of Modifying CdSe Thin Films by the Addition of Cobalt and Nickel to Enhance the Efficiency of Photocatalytic Decomposition of Organic Dyes

Omarova,

Ayazbaev,

Yesdauletova

et al. 2023

J. Compos. Sci.

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“…Cu 2 Se thin films synthesized by chemical methods strongly depend on the growth mechanism (Thirumavalavan et al 2015). By adjusting the initial conditions such as the concentration, the complex agent (pH), and thermal behavior of the solution during the deposition process it is possible to control the stoichiometry, optical transition and other main quantities related to semiconductors (Piryaei et al 2016). Here, besides to the constituent concentration, the role of deposition time in sample preparation on surface structures and crystallinity was also studied.…”

Section: Introductionmentioning

confidence: 99%

Optical band gap, photocatalysis, surface structures and depth profile properties of Cu₂Se nanostructured thin films

Ghobadi¹,

Hatam²

2022

Mater. Res. Express

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The optical behaviour, stoichiometry, surface configuration of Cu2Se nanostructured thin layers prepared at different reaction times by the chemical process has been considered. The optical band gap of the deposited thin films decreases from 2.92 eV to 2.08 eV for the first transition and from 2.18 to 1.2 eV for the second transition. In addition, it was shown that Urbach energy is independent from the film thickness, and tail values of the localized states has decreased from 1.15 to 0.33 eV. It was found that the concentration of Cu: Se remains approximately constant across the depth of the deposited film at higher deposition time. The degradation efficiency of 98% was achieved by Congo red for the prepared Cu2Se thin film at optimal condition which make it a good candidate for organic dye. From these measurements and by controlling the band gap energy, the Cu2Se can find application in solar cell application.

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Studies on chemically synthesized PbS thin films for IR detector application

Rohom

Londhe

Jadhav

et al. 2017

J Mater Sci: Mater Electron

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Influence of pH on the optical, structural and compositional properties of nanocrystalline CdSe thin films prepared by chemical bath deposition

Cited by 10 publications

References 14 publications

Evaluation of the Applicability of Modifying CdSe Thin Films by the Addition of Cobalt and Nickel to Enhance the Efficiency of Photocatalytic Decomposition of Organic Dyes

Evaluation of the Applicability of Modifying CdSe Thin Films by the Addition of Cobalt and Nickel to Enhance the Efficiency of Photocatalytic Decomposition of Organic Dyes

Optical band gap, photocatalysis, surface structures and depth profile properties of Cu₂Se nanostructured thin films

Studies on chemically synthesized PbS thin films for IR detector application

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Influence of pH on the optical, structural and compositional properties of nanocrystalline CdSe thin films prepared by chemical bath deposition

Cited by 10 publications

References 14 publications

Evaluation of the Applicability of Modifying CdSe Thin Films by the Addition of Cobalt and Nickel to Enhance the Efficiency of Photocatalytic Decomposition of Organic Dyes

Evaluation of the Applicability of Modifying CdSe Thin Films by the Addition of Cobalt and Nickel to Enhance the Efficiency of Photocatalytic Decomposition of Organic Dyes

Optical band gap, photocatalysis, surface structures and depth profile properties of Cu2Se nanostructured thin films

Studies on chemically synthesized PbS thin films for IR detector application

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Optical band gap, photocatalysis, surface structures and depth profile properties of Cu₂Se nanostructured thin films