Synthesis and characterization of nanoparticle thin films of a-(PbSe)100−xCdx lead chalcogenides

Alvi, M. A.; Khan, Zishan H.

doi:10.1186/1556-276x-8-148

Cited by 37 publications

(11 citation statements)

References 55 publications

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“…The high frequency peak that appeared at about 800 cm −l is in accordance with the polar theory reported for PbSe, which possibly corresponds to the ground state energy of the PbSe polaron. (48)(49)(50) This peak is not seen for 0 mol% PbSe.…”

Section: Compositional Dependence Of Pbse On Glass Networkmentioning

confidence: 99%

Influence of phase separation on structure–property relationships in the (GeSe2–3As2Se3)1−xPbSex glass system

Yadav¹,

Kang²,

Smith³

et al. 2017

Phys. Chem. Glasses: Eur. J. Glass Sci. Technol. B

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Section: Compositional Dependence Of Pbse On Glass Networkmentioning

confidence: 99%

Influence of phase separation on structure–property relationships in the (GeSe2–3As2Se3)1−xPbSex glass system

Yadav¹,

Kang²,

Smith³

et al. 2017

Phys. Chem. Glasses: Eur. J. Glass Sci. Technol. B

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“…summarized as either photo-induced change or a change in chemical composition that favors the increase of any metal content [43][44][45][46]. Consequently, the increase of the homopolar bonds between the atoms of the same metal.…”

Section: Absorption Coefficients and Optical Band Gapsmentioning

confidence: 99%

Effect of SnS addition on the morphological and optical properties of (SnS)m(Sb2S3)n nano-rods elaborated by glancing angle deposition

Abdelkader

Akkari

Khémiri

et al. 2018

Physica B: Condensed Matter

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(SnS) m (Sb 2 S 3) n thin films were prepared by thermal evaporation using the glancing angle deposition technique (GLAD). The incident angle between the particle flux and the normal to the substrate was fixed at 80°. The Raman and XRD characterization revealed the amorphous character of the films due to the columnar structure as shown by the SEM characterization and AFM analysis. A strong change of the surface morphology of the films was observed and it depends on the composition. Optical properties were extracted from transmittance T and reflectance R spectra. (SnS) m (Sb 2 S 3) n thin films exhibit high absorption coefficients (10 4-2×10 5 cm-1) in the visible range and the higher values were obtained for Sn 3 Sb 2 S 6 and it has the highest photocurrent values. The direct band gap (E g dir) was in the range 2.11-1.67 eV. The refractive indices are calculated from optical transmittance spectra of the films. The Sn 3 Sb 2 S 6 sample exhibits a lower refractive index. All the dispersion curves of refractive index match well with the Cauchy dispersion formula and they were analyzed using Wemple-DiDomenico model. The Bruggeman effective medium approximation EMA was used to calculate the packing density of different compositions, and SnSb 4 S 7 sample has the highest

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“…Among these materials, chalcogenides are the most studied materials. In fact, amorphous materials became popular only after the discovery of chalcogenides, and later, many interesting physical properties of these materials [ 3 , 4 ] were reported. These chalcogenides have special application in optical devices due to their transparency in the IR region.…”

Section: Introductionmentioning

confidence: 99%

Optical and structural properties of amorphous Se x Te100-x aligned nanorods

Al-Agel

2013

Nanoscale Res Lett

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In the present work, we report studies on optical and structural phenomenon in as-deposited thin films composed of aligned nanorods of amorphous SexTe100-x (x = 3, 6, 9, and 12). In structural studies, field emission scanning electron microscopic (FESEM) images suggest that these thin films contain high yield of aligned nanorods. These nanorods show a completely amorphous nature, which is verified by X-ray diffraction patterns of these thin films. Optical studies include the measurement of spectral dependence of absorption, reflection, and transmission of these thin films, respectively. On the basis of optical absorption data, a direct optical band gap is observed. This observation of a direct optical band gap in these nanorods is interesting as chalcogenides normally show an indirect band gap, and due to this reason, these materials could not become very popular for semiconducting devices. Therefore, this is an important report and will open up new directions for the application of these materials in semiconducting devices. The value of this optical band gap is found to decrease with the increase in selenium (Se) concentration. The reflection and absorption data are employed to estimate the values of optical constants (extinction coefficient (k) and refractive index (n)). From the spectral dependence of these optical constants, it is found that the values of refractive index (n) increase, whereas the values of extinction coefficient (k) decrease with the increase in photon energy. The real and imaginary parts of dielectric constants calculated with the values of extinction coefficient (k) and refractive index (n), are found to vary with photon energy and dopant concentration.

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Synthesis and characterization of nanoparticle thin films of a-(PbSe)100−xCdx lead chalcogenides

Cited by 37 publications

References 55 publications

Influence of phase separation on structure–property relationships in the (GeSe2–3As2Se3)1−xPbSex glass system

Influence of phase separation on structure–property relationships in the (GeSe2–3As2Se3)1−xPbSex glass system

Effect of SnS addition on the morphological and optical properties of (SnS)m(Sb2S3)n nano-rods elaborated by glancing angle deposition

Optical and structural properties of amorphous Se x Te100-x aligned nanorods

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