Temperature-dependent growth and XPS of Ag-doped ZnTe thin films deposited by close space sublimation method

Potlog, Tamara; Duca, Dumitru; Dobromir, Marius

doi:10.1016/j.apsusc.2015.03.133

Cited by 61 publications

(20 citation statements)

References 15 publications

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“…These correspond to the binding energies of S 2p, which are assigned to S 2– of CdS . Furthermore, the XPS spectrum of Ag displays two peaks at 367.8 (Ag 3d 5/2 ) and 373.9 eV (Ag 3d 3/2 ), which confirms both the presence of Ag in its zero‐valent form and its metallic nature and elementary substance . This conforms with the above test results.…”

Section: Resultssupporting

confidence: 85%

Silver‐Loaded Bio‐Structured Carbon/Cadmium Sulfide Lamellar Composites with Enhanced Photocatalysis under Visible Light

Yan

Chen

You

et al. 2020

Zeitschrift anorg allge chemie

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A silver (Ag)-loaded biostructured carbon/cadmium sulfide (CdS) lamellar composite photocatalyst was synthesized using a hydrothermal and photodeposition method. Camellia petals functioned both as a biological layered template and as a source of carbon. The prepared composite photocatalyst demonstrated good absorption under visible light and exhibited excellent photocatalytic degradation performance. The photocatalytic degradation efficiency of the obtained 457 composites substantially improved compared with pure CdS. The 5 wt.-% Ag-loaded C/CdS sample exhibited the highest photocatalytic activity, reaching 96.5 % after 180 min, which was 8.7 times that of pure CdS. Specifically, the biocarbon sheet enhanced the absorption of visible light. Furthermore, the high electrical conductivity of Ag can effectively transfer and separate photogenerated electrons and holes, thus enhancing both photocatalytic performance and stability.

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Section: Resultssupporting

confidence: 85%

Silver‐Loaded Bio‐Structured Carbon/Cadmium Sulfide Lamellar Composites with Enhanced Photocatalysis under Visible Light

Yan

Chen

You

et al. 2020

Zeitschrift anorg allge chemie

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“…Therefore, ZnTe is the best candidate to fulfill these requirements and compatibility with the CdTe based tandem solar cells [6]. High resistivity of ZnTe system is another bottleneck, therefore, a heavily doped p -type element is required to uplift the conductivity in a ZnTe semiconductor [6,7]. Copper (Cu) can act as a suitable p -type acceptor to achieve this goal.…”

Section: Introductionmentioning

confidence: 99%

Pronounced Impact of p-Type Carriers and Reduction of Bandgap in Semiconducting ZnTe Thin Films by Cu Doping for Intermediate Buffer Layer in Heterojunction Solar Cells

et al. 2019

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Stabilized un-doped Zinc Telluride (ZnTe) thin films were grown on glass substrates under vacuum using a closed space sublimation (CSS) technique. A dilute copper nitrate solution (0.1/100 mL) was prepared for copper doping, known as an ion exchange process, in the matrix of the ZnTe thin film. The reproducible polycrystalline cubic structure of undoped and the Cu doped ZnTe thin films with preferred orientation (111) was confirmed by X-rays diffraction (XRD) technique. Lattice parameter analyses verified the expansion of unit cell volume after incorporation of Cu species into ZnTe thin films samples. The micrographs of scanning electron microscopy (SEM) were used to measure the variation in crystal sizes of samples. The energy dispersive X-rays were used to validate the elemental composition of undoped and Cu-doped ZnTe thin films. The bandgap energy 2.24 eV of the ZnTe thin film decreased after doping Cu to 2.20 eV and may be due to the introduction of acceptors states near to valance band. Optical studies showed that refractive index was measured from 2.18 to 3.24, whereas thicknesses varied between 220 nm to 320 nm for un-doped and Cu doped ZnTe thin film, respectively, using the Swanepoel model. The oxidation states of Zn2+, Te2+, and Cu+ through high resolution X-ray photoelectron spectroscopy (XPS) analyses was observed. The resistivity of thin films changed from ~107 Ω·cm or undoped ZnTe to ~1 Ω·cm for Cu-doped ZnTe thin film, whereas p-type carrier concentration increased from 4 × 109 cm−2 to 1.4 × 1011 cm−2, respectively. These results predicted that Cu-doped ZnTe thin film can be used as an ideal, efficient, and stable intermediate layer between metallic and absorber back contact for the heterojunction thin film solar cell technology.

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“…4 shows the Ag 3d doublets with binding energies of 368.1 eV and 374.1 eV, corresponding to Ag 3d 5/2 and Ag 3d 3/2 , respectively. According to the literature [ 27 – 28 ], these peaks can be attributed to metallic silver (Ag 0 ). Fig.…”

Section: Resultsmentioning

confidence: 99%

A visible-light-controlled platform for prolonged drug release based on Ag-doped TiO₂ nanotubes with a hydrophobic layer

Liang

Jiang

Liao

2018

Beilstein J. Nanotechnol.

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In this work, a visible-light-controlled drug release platform was constructed for localized and prolonged drug release based on two-layer titania nanotubes (TNTs) fabricated using by an in situ voltage up-anodization process. The visible-light photocatalytic activity is improved by loading Ag onto the TNTs by NaBH4 reduction. Then, the TNTs containing Ag nanoparticles were modified with dodecanethiol (NDM) to create a hydrophobic layer. To demonstrate the visible-light-controlled drug release, the Zn2+ release behavior of the samples was investigated. In the initial 12 h, TNTs without NDM displayed a faster release rate with 29.4% Zn2+ release, which was more than three times that of the TNTs with NDM (8.7% Zn2+ release). Upon visible-light illumination, drug release from the sample coated with NDM was shown to increase due to the photocatalytic decomposition of NDM. The amount of released Zn2+ for this sample increased up to 71.9% within 12 h, indicating visible-light-controlled drug release. This drug release system may exhibit promising application as a localized, prolonged drug delivery platform.

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Temperature-dependent growth and XPS of Ag-doped ZnTe thin films deposited by close space sublimation method

Cited by 61 publications

References 15 publications

Silver‐Loaded Bio‐Structured Carbon/Cadmium Sulfide Lamellar Composites with Enhanced Photocatalysis under Visible Light

Silver‐Loaded Bio‐Structured Carbon/Cadmium Sulfide Lamellar Composites with Enhanced Photocatalysis under Visible Light

Pronounced Impact of p-Type Carriers and Reduction of Bandgap in Semiconducting ZnTe Thin Films by Cu Doping for Intermediate Buffer Layer in Heterojunction Solar Cells

A visible-light-controlled platform for prolonged drug release based on Ag-doped TiO₂ nanotubes with a hydrophobic layer

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Temperature-dependent growth and XPS of Ag-doped ZnTe thin films deposited by close space sublimation method

Cited by 61 publications

References 15 publications

Silver‐Loaded Bio‐Structured Carbon/Cadmium Sulfide Lamellar Composites with Enhanced Photocatalysis under Visible Light

Silver‐Loaded Bio‐Structured Carbon/Cadmium Sulfide Lamellar Composites with Enhanced Photocatalysis under Visible Light

Pronounced Impact of p-Type Carriers and Reduction of Bandgap in Semiconducting ZnTe Thin Films by Cu Doping for Intermediate Buffer Layer in Heterojunction Solar Cells

A visible-light-controlled platform for prolonged drug release based on Ag-doped TiO2 nanotubes with a hydrophobic layer

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A visible-light-controlled platform for prolonged drug release based on Ag-doped TiO₂ nanotubes with a hydrophobic layer