Physical Property Characterization of Pb2+-Doped CdS Nanofilms Deposited by Chemical-Bath Deposition at Low Temperature

Dı́az-Reyes, J.; Contreras-Rascón, J.I.; Galván-Arellano, M.; Arias-Cerón, J.S.; Gutiérrez-Arias, José Eligio Moisés; Flores-Mena, J. E.; Morín-Castillo, M. M.

doi:10.1007/s13538-016-0445-0

Cited by 8 publications

(9 citation statements)

References 35 publications

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“…It can be observed that each peak corresponds fairly well with data of CdS marked in the software DICVOL04 data. The structural parameters obtained with the software DICVOL04 data are in good agreement with the published ones elsewhere 23 . From this close agreement, it is confirmed that as-deposited CdS:RE 3+ nanofilms for all the used synthesis times and precursor concentrations belong to face-centered cubic system (fcc).…”

Section: Resultssupporting

confidence: 87%

“…From this close agreement, it is confirmed that as-deposited CdS:RE 3+ nanofilms for all the used synthesis times and precursor concentrations belong to face-centered cubic system (fcc). The X-ray diffraction patterns of CdS and CdS:RE 3+ nanofilms are described in the Fm-3m(225), whose lattice parameters were calculated using the software DICVOL04, obtaining the lattice parameter value for C60: a = 5.76 Å, which is in agreement with the reported values [23][24][25] . As has been reported Cadmium sulphide exists in two crystalline phase modifications: the wurtzite (WZ) 26 and zinc blende (ZB) phase 25 .…”

Section: Resultssupporting

confidence: 70%

“…There is a tendency of the Full Width at Half Maximum (FWHM) of (111) peak of the growth films probably due to all of the possible RE 3+ species present in Cd 2+ sites and interstitials positions 33 , and also to the existence of RE 2 S 3 , which distort the crystalline lattice and provoke disorder. The distortion produces a strong strain that affects the interatomic distances; this similar fact has been reported 23,34 . In this work, the strain and distortion of the lattice can be smaller.…”

Section: +supporting

confidence: 71%

“…6a shows the first derivative of the optical density [d(OD)/dE] as a function of the incident photon energy (E) of typical samples. The relative minima in the transmittance spectra of the first derivative d(OD)/ dE versus E graph define the critical points of the band structure 35,36 , which are associated absorption bands due impurities and vacancies 23 , as is observed in Fig. 6a.…”

Section: +mentioning

confidence: 85%

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Characterization of CBD-CdS Doped with Some Rare Earths III (Eu3+,Ce3+) as Function of Synthesis Time

et al. 2018

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Rare earths (Europium, cerium)-doped CdS nanofilms are prepared using the growth technique chemical bath deposition (CBD) at the reservoir temperature of 70±2°C varying the synthesis time in a wide range. For the rare earths doped CdS nanofilms the synthesis time was ranged from 80 to 135 min. The rare earths molar concentration was in the range 0.0≤x≤3.47, which was determined by energy dispersive X-ray spectroscopy (EDS). The X-ray diffraction (XRD) analysis reveals that CdS nanofilms showed the zinc blende (ZB) crystalline phase. The nanocrystal size was ranged from 2.67 to 2.35 nm for the CdS and 1.84-2.33 nm for rare earth-doped CdS that were determined by the Debye-Scherrer equation from ZB (111) direction and it was confirmed by transmission electron microscopy (TEM). The doped CdS exhibits a direct band gap that diminishes with the increase of the synthesis time, from 2.50 to 2.42 eV, which was obtained by transmittance. The room-temperature photoluminescence of CdS presents the band-to-band transition at 431 nm, which is associated with quantum confinement because the grain size is less than its Bohr exciton radius and a dominant band at 523 nm, which is called the optical signature of interstitial oxygen. Eu 3+ -doped CdS photoluminescence shows the dominant radiative peak at 576 nm that is associated to the intra-4f radiative transition of Eu 3+ ions, which corresponds to the magnetic dipole transition, (). For the Ce 3+-doped CdS the dominant radiative transitions are clearly redshifted. Additionally, other radiative peaks associated at structural defects are observed. The passivation of the CdS by rare earths was approximately of two orders of magnitude obtaining better results with cerium.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 70%

Section: +supporting

confidence: 71%

Section: +mentioning

confidence: 85%

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Characterization of CBD-CdS Doped with Some Rare Earths III (Eu3+,Ce3+) as Function of Synthesis Time

et al. 2018

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“…As is known the atomic weight of the ideal unit cell is ∼288.95 u that corresponds to 22.19% sulphur atoms and 77.81% cadmium atoms. Therefore, if there is excess cadmium and lack of sulphur that is indicative that cadmium is interstitial and there are vacancies of sulphur [16]. Table I shows that the nanofilms contain a lower concentration of sulphur, indicating that have a high concentration of sulphur vacancies.…”

Section: Resultsmentioning

confidence: 99%

Rare earths (Ce, Eu) molar concentration-dependent of the structural and optical properties of CBD-CdS nanofilms

et al. 2018

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It presents the characterization of rare earths (Eu,Ce)-doped CdS nanofilms that were synthesised by the growth technique chemical bath deposition (CBD) at the reservoir temperature of 70 ± 2• C. The doping of CdS with rare earths is performed by varying the synthesis time from 60 to 135 min. The rare earths molar concentration was range from 0.0 ≤ x ≤ 3.5, which was determined by energy dispersive X-ray spectroscopy. X-ray diffraction (XRD) analysis and Raman scattering reveal that CdS nanofilms showed the zinc blende (ZB) crystalline phase. The CdS average nanocrystal size was ranged from 1.84 to 2.67 nm that was determined by the Debye-Scherrer equation from ZB (111) direction, which was confirmed by transmission electron microscopy. Raman scattering shows that the lattice dynamics is characteristic of bimodal behaviour and the multipeaks adjust of the first optical longitudinal mode for the (Eu,Ce)-doped CdS, which denotes the Raman shift of the characteristic peak about 305 cm −1 of the CdS nanocrystals. The CdS nanofilms exhibit a direct bandgap that slightly decreases with increasing doping, from 2.50 to 2.42 eV, which was obtained by room temperature transmittance. The room-temperature photoluminescence of CdS shows the band-to-band transition at 2.88 eV, which is associated to quantum confinement and a dominant radiative band at 2.37 eV that is called the optical signature of interstitial oxygen. The Eu 3+ -doped CdS photoluminescence shows the dominant radiative band at 2.15 eV, which is associated to the intra-4f radiative transition of Eu 3+ ions that corresponds to the magnetic dipole transition, ( 5 D0→ 7 F 1 ).For the Ce 3+ -doped CdS the dominant radiative transition, at 2.06 eV, is clearly redshifted, although the passivation of the CdS nanofilms byCe was approximately by a factor about 21 for the best results.Keywords: CdS; Chemical bath deposition; Rare earths; cerium; europium.Se presenta la caracterización de las nanopelículas de CdS impurificadas con tierras raras (Eu,Ce) que se sintetizaron mediante la técnica de crecimiento deposición de baño químico (CBD) a la temperatura del reservorio de 70 ± 2 • C. La impurificación de CdS con tierras raras se realizó variando el tiempo de síntesis de 60 a 135 min. La concentración molar de las tierras raras fue de 0.0 ≤ x ≤ 3.5, que se determinó mediante espectroscopia de rayos X de energía dispersiva. El análisis de difracción de rayos X (XRD) y dispersión de Raman revelan que las nanopelículas de CdS mostraron la fase cristalina de zinc blenda (ZB). El tamaño medio de los nanocristales de CdS varió de 1.84 a 2.67 nm, que se determinó mediante la ecuación de Debye-Scherrer a partir de la dirección ZB (111), que se confirmó mediante microscopía electrónica de transmisión. La dispersión Raman muestra que la dinámica de la red es característica del comportamiento bimodal y el ajuste multipicos del primer modo longitudinalóptico para el CdS impurificado con (Eu, Ce), el cual denota el desplazamiento Raman del pico característico en aproximadamente 305 ...

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Characterization of CBD–CdS nanocrystals doped with Co2+

Contreras-Rascón

Dı́az-Reyes

Linares-Avilés

et al. 2018

J Mater Sci: Mater Electron

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Physical Property Characterization of Pb2+-Doped CdS Nanofilms Deposited by Chemical-Bath Deposition at Low Temperature

Cited by 8 publications

References 35 publications

Characterization of CBD-CdS Doped with Some Rare Earths III (Eu3+,Ce3+) as Function of Synthesis Time

Characterization of CBD-CdS Doped with Some Rare Earths III (Eu3+,Ce3+) as Function of Synthesis Time

Rare earths (Ce, Eu) molar concentration-dependent of the structural and optical properties of CBD-CdS nanofilms

Characterization of CBD–CdS nanocrystals doped with Co2+

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