Optical characterization of pyrolytically deposited ZnxCd1−xS thin films

Eleruja, Marcus Adebola; Adedeji, Adetayo; Ojo, I. A. O.; Djebah, A; Osasona, O.; Aladekomo, J. B.; Ajayi, E. O. B.

doi:10.1016/s0925-3467(97)00178-x

Cited by 15 publications

(9 citation statements)

References 21 publications

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“…The lithium manganese oxide thin film samples were prepared by the pyrolysis of synthesized lithium manganese acetylacetonate precursor using MOCVD deposition technique, earlier reported [9,13,14]. The films were deposited on sodalime glass substrates positioned on stainless steel blocks for good and uniform thermal contact.…”

Section: Thin Film Depositionmentioning

confidence: 99%

Metal-organic chemical vapour deposition of lithium manganese oxide thin films via single solid source precursor

Oyedotun

Ajenifuja

Olofinjana

et al. 2015

Materials Science-Poland

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Lithium manganese oxide thin films were deposited on sodalime glass substrates by metal organic chemical vapour deposition (MOCVD) technique. The films were prepared by pyrolysis of lithium manganese acetylacetonate precursor at a temperature of 420°C with a flow rate of 2.5 dm 3 /min for two-hour deposition period. Rutherford backscattering spectroscopy (RBS), UV-Vis spectrophotometry, X-ray diffraction (XRD) spectroscopy, atomic force microscopy (AFM) and van der Pauw four point probe method were used for characterizations of the film samples. RBS studies of the films revealed fair thickness of 1112.311 (10 15 atoms/cm 2 ) and effective stoichiometric relationship of Li 0.47 Mn 0.27 O 0.26 . The films exhibited relatively high transmission (50 % T) in the visible and NIR range, with the bandgap energy of 2.55 eV. Broad and diffused X-ray diffraction patterns obtained showed that the film was amorphous in nature, while microstructural studies indicated dense and uniformly distributed layer across the substrate. Resistivity value of 4.9 Ω·cm was obtained for the thin film. Compared with Mn 0.2 O 0.8 thin film, a significant lattice absorption edge shift was observed in the Li 0.47 Mn 0.27 O 0.26 film.

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Section: Thin Film Depositionmentioning

confidence: 99%

Metal-organic chemical vapour deposition of lithium manganese oxide thin films via single solid source precursor

Oyedotun

Ajenifuja

Olofinjana

et al. 2015

Materials Science-Poland

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“…Cd x Zn 1− x S mixed crystals have recently been studied experimentally 9–16. In particular, Sakly et al 9 have described the bowing phenomenon in Cd 1− x Zn x S alloys.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, Sakly et al 9 have described the bowing phenomenon in Cd 1− x Zn x S alloys. Eleruja et al 10 have investigated optical characterization of Zn x Cd 1− x S films. Thermal and optical characterization of Zn x Cd 1− x S have been studied by Hernandez et al 11.…”

Section: Introductionmentioning

confidence: 99%

The effects of concentration on the electronic and optical properties in Cd_xZn_1−xS ternary alloys

Körözlü

Çolakoǧlu

Deligöz

2010

Physica Status Solidi (b)

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The structural, electronic and optical properties of Cd x Zn 1Àx S alloys have been studied using the first-principles plane-wave pseudopotential (PP) method within the local-density approximations (LDAs). The effects of composition on lattice constants, bulk modulus, band gap, dielectric functions, refractive index, extinction coefficient and energy loss function are investigated. It has been found that the lattice constants and bulk modulus change as almost linear for these alloys. Calculated electronic structure and density of states (DOS) of Cd x Zn 1-x S alloys are discussed in terms of the contribution of Zn d, Cd d and p and S s and p states. Our results agree well with the available data in the literature.

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“…[9] Alternative approaches based on single-source precursors, such as bis(morpholinodithioato-s,s ¢)Cd-Zn, were attempted. [23] In this case, the presence of Zn, Cd, and S in the same molecular architecture was expected to yield an improved compositional control, but difficulties arose from the cleavage of metal±metal bonds in the vapor phase. Recently, we have reported on the use of metal O-alkylxanthates of the general formula M(O-RXan) 2 [M = Zn,Cd; O-RXan = S 2 COCH 2 CH 3 , S 2 COCH(CH 3 ) 2 ] as singlesource CVD precursors for single-phase MS layers.…”

Section: Introductionmentioning

confidence: 99%

CVD of Nanophasic (Zn, Cd)S Thin Films: From Multi‐Layers to Solid Solutions

Barreca¹,

Gasparotto

Maragno

et al. 2004

Chemical Vapor Deposition

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Nanostructured Zn x Cd 1 ± x S (0 £ x £ 1) thin films were synthesized by CVD on SiO 2 substrates using M(Oi PrXan) 2 (M = Zn,Cd; Oi PrXan = S 2 COCH(CH 3 ) 2 ) as precursor compounds. The method of preparation used consisted in the sequential deposition of single-phase MS coatings (M = Zn,Cd) at 300 C in a N 2 flow, followed by ex-situ annealing in an inert atmosphere at various temperatures in the range 400±700 C. The obtained specimens were thoroughly characterized before and after thermal treatments, paying particular attention to their structure, composition, morphology, and optical properties. Annealing in N 2 at 600 C for 3 h resulted in the formation of a homogeneous Zn x Cd 1 ± x S solid solution. Lower temperatures did not produce a uniform sample composition, while more severe annealing conditions induced CdS sublimation. Moreover, a compositional control of the Zn x Cd 1 ± x S ternary phase could be achieved by varying the ZnS overlayer deposition time.Irrespective of the annealing conditions, all the obtained films were contaminant-free and nanophasic (AE »25 nm), and possessed a hexagonal crystal structure the lattice parameters of which decreased linearly with increasing zinc molar fraction. A parallel evolution of optical absorption spectra was also observed. In the present paper, the interrelations between film properties and processing conditions are investigated, focusing particularly on the (Zn,Cd)S evolution to Zn x Cd 1 ± x S solid solutions.

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Optical characterization of pyrolytically deposited ZnxCd1−xS thin films

Cited by 15 publications

References 21 publications

Metal-organic chemical vapour deposition of lithium manganese oxide thin films via single solid source precursor

Metal-organic chemical vapour deposition of lithium manganese oxide thin films via single solid source precursor

The effects of concentration on the electronic and optical properties in Cd_xZn_1−xS ternary alloys

CVD of Nanophasic (Zn, Cd)S Thin Films: From Multi‐Layers to Solid Solutions

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Optical characterization of pyrolytically deposited ZnxCd1−xS thin films

Cited by 15 publications

References 21 publications

Metal-organic chemical vapour deposition of lithium manganese oxide thin films via single solid source precursor

Metal-organic chemical vapour deposition of lithium manganese oxide thin films via single solid source precursor

The effects of concentration on the electronic and optical properties in CdxZn1−xS ternary alloys

CVD of Nanophasic (Zn, Cd)S Thin Films: From Multi‐Layers to Solid Solutions

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The effects of concentration on the electronic and optical properties in Cd_xZn_1−xS ternary alloys