Structural and optical properties of chemically deposited Cd(S-Se): CdCl2, Sm films

Singh, Rajinder; Bhushan, S.

doi:10.1007/s12034-009-0019-7

Cited by 24 publications

(7 citation statements)

References 24 publications

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“…The appearance of the three mentioned peaks was observed by several other authors Baranov (2003), Dabbousi et al (1997), Schumacher et al (2009).The broadening of the apparent X-ray diffraction peaks indicates that the CdSe/ZnS core-shells are in nanodimension. Using the width of (111) peak in Scherer relation John et al (2010), Gupta et al (2009), Ramalingam et al (2008) and Singh et al (2010):…”

Section: Resultsmentioning

confidence: 99%

CdSe/ZnS Core-Shell System Enhance the Efficiency of the White Light Generation

Suhail¹,

Kadim²,

Ibrahim³

et al. 2012

APR

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The synthesis techniques of highly luminescent CdSe/ZnS core-shell composite nanocrystals are reported. The color-conversion, incorporating the photoluminescence emission of CdSe/ZnS core-shell nanocrystals in blue λ=350 nm and green λ=520 nm on near UV-InGaN/GaN LED λ=365 nm, was studied. The generated white light resulting from color-mixing of the emitted wavelengths of the core-shell composite and that of the near UV emission from the LED was analyzed depending upon the chromaticity coordinates. The X-ray diffraction pattern was used to study the CdSe/ZnS core-shell structure and the nanocrystal size formation. The absorption and photoluminescence spectra of the composite core-shell were investigated. The Gaussian fit was applied to the fluorescence spectrum of the CdSe/ZnS core-shell in order to determine the chromaticity coordinates of the output white light emitted on the chromaticity diagram.

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Section: Resultsmentioning

confidence: 99%

CdSe/ZnS Core-Shell System Enhance the Efficiency of the White Light Generation

Suhail¹,

Kadim²,

Ibrahim³

et al. 2012

APR

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“…2a-e. As shown in the images, they displayed spherical or ball type structures with heterogeneous size along with some voids or macro pores around them, with smooth background, indicates that the film was deposited via layered type growth which appeared due to the overlapping of layers under continued deposition process (Singh and Bhushan 2009). In Fig.…”

Section: Sem Studiesmentioning

confidence: 90%

Structural, morphological and optical studies on chemically deposited nanocrystalline Gd-doped $$\hbox {Cd}_{0.5} \hbox {Zn}_{0.5}\hbox {Se}$$ Cd 0.5 Zn 0.5 Se thin films

Deo

Singh²,

Deshmukh

et al. 2014

Opt Quant Electron

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The thin films of cadmium zinc selenide (Cd 0.5 Zn 0.5 Se) were prepared over glass substrates by chemical bath deposition technique. The Cd 0.5 Zn 0.5 Se thin films were doped with Gd at various doping values. The structural, morphological, compositional and optical properties were examined by XRD, SEM, EDX, UV-visible absorption and photoluminescence studies, respectively. Various structural parameters were calculated and the band gaps for these thin films were estimated and found in the range of 2.19-1.79 eV with respect to increasing doping values.

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“…The X-ray diffractograms of CdS, CdSe, CdS 0.9 Se 0.1 (as-deposited and annealed), have mixed hexagonal and cubic phases. Singh and Bhushan [1] have suggested that, the pure CdS thin film might be described as consisting of different atomic layers of CdS in cubic as well as hexagonal phases. A similar explanation can be used for the pure CdSe thin film.…”

Section: X-ray Diffraction Studiesmentioning

confidence: 99%

“…This is due to the interesting properties they exhibit such as, high absorption coefficients in the visible and infrared part of the electromagnetic spectrum, good electrical properties (e.g. carrier mobility and lifetime) and the possibility of obtaining adjustable n-or p-type conductivity by doping [1]. Both compounds have direct band gaps with values suitable for photovoltaic applications.…”

Section: Introductionmentioning

confidence: 99%

Optical and Structural Properties of Chemical Bath Deposited Cadmium Sulphur Selenide (CdS1–xSex (0 ≤ x ≤ 1)) Thin Films

Ngbiche¹,

Nkrumah²,

Ampong³

et al. 2019

OJAppS

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The tuneable band gap property of Cadmium-sulphur-selenide (CdS 1-x Se x ) thin film makes it an appropriate material for a wide range of optoelectronic applications and this has aroused a lot of interest. In this paper, we report the study of Cadmium-sulphur-selenide (CdS 1-x Se x ) thin films, successfully grown on commercial glass slide substrate by the chemical bath deposition technique. The effect of selenium content (x value) on the structural, and some optical properties have been studied. The bath solution contained cadmium acetate dehydrate [Cd(CH 3 COO) 2 ·2H 2 O], sodium selenosulphate [Na 2 SeSO 3 ] and thiourea [CS(NH 2 ) 2 ] were used as the sources of Cd 2+ , Se 2− and S 2+ , respectively. Tartaric acid (C 4 H 6 O 6 ) was used as a complexing agent. The pH of the solution was adjusted to 12 by drop-wise addition of ammonia. The bath temperature was kept at 90˚C for a deposition time of 1 hour. Post deposition annealing processes of the thin films were performed in a furnace at a temperature of 400˚C for two hours. Both as-deposited and annealed films were characterised by Powder X-Ray Diffraction, Scanning Electron Microscopy, UV-Visible Optical Absorption Spectroscopy and Energy Dispersive X-Ray Analysis. Optical absorption data analysis indicates that direct allowed transitions occur in the films. The band gap of the as-deposited CdS 1-x Se x decreased linearly from 2.34 eV to 1.48 eV, with increasing selenium content, and in the annealed samples, decreased from 1.84 eV to 1.36 eV. X-ray diffraction measurements revealed, that pure CdS, and CdSe had mixed hexagonal and cubic phases. All the remaining ternary compounds were composed of cubic CdS and hexagonal CdSe phases. The annealed samples showed well defined and more intense peaks, suggesting an improvement in crystallinity. The average grain size increased slightly with increasing selenium content. SEM micrographs showed that the films were compact with a smooth texture and good coverage across the entire area of the substrate.

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Structural and optical properties of chemically deposited Cd(S-Se): CdCl2, Sm films

Cited by 24 publications

References 24 publications

CdSe/ZnS Core-Shell System Enhance the Efficiency of the White Light Generation

CdSe/ZnS Core-Shell System Enhance the Efficiency of the White Light Generation

Structural, morphological and optical studies on chemically deposited nanocrystalline Gd-doped $$\hbox {Cd}_{0.5} \hbox {Zn}_{0.5}\hbox {Se}$$ Cd 0.5 Zn 0.5 Se thin films

Optical and Structural Properties of Chemical Bath Deposited Cadmium Sulphur Selenide (CdS1–xSex (0 ≤ x ≤ 1)) Thin Films

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