Properties of CdSe films produced via spray pyrolysis of [Cd((NH2)2CSe)2Cl2]

Meteleva, Yu. V.; Radychev, N. A.; Новиков, Г. Ф.

doi:10.1134/s0020168507050032

Cited by 13 publications

(4 citation statements)

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“…36 Recently, spray hydrolysis of [Cd(SeU) 2 Cl 2 ] in aqueous solution, prepared by reacting CdCl 2 hydrate with 4-fold selenourea, was used to generate CdSe films. 37 CdSe nanocrystals have also been prepared by fast injection of a base to a solution of Cd(NO 3 ) 2 ·4H 2 O and selenourea at room temperature. The mechanism of this reaction seems to be via an unidentified intermediate Cd-selenourea complex.…”

Section: Introductionmentioning

confidence: 99%

“…A solid state 113 Cd NMR spectrum of [Cd(SeU) 2 Cl 2 ] showed an isotropic chemical shift of δ iso ( 113 Cd) = 458 ppm . Recently, spray hydrolysis of [Cd(SeU) 2 Cl 2 ] in aqueous solution, prepared by reacting CdCl 2 hydrate with 4-fold selenourea, was used to generate CdSe films . CdSe nanocrystals have also been prepared by fast injection of a base to a solution of Cd(NO 3 ) 2 ·4H 2 O and selenourea at room temperature.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Cadmium(II) Complex Formation with Selenourea and Thiourea in Solution: An XAS and ¹¹³Cd NMR Study

2012

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The complexes formed in methanol solutions of Cd(CF3SO3)2 with selenourea (SeU) or thiourea (TU), for thiourea also in aqueous solution, were studied by combining 113Cd NMR and X-ray absorption spectroscopy. At low temperature (~200 K) distinct 113Cd NMR signals were observed, corresponding to CdLn2+ species (n = 0 - 4, L = TU or SeU) in slow ligand exchange. Peak integrals were used to obtain the speciation in the methanol solutions, allowing stability constants to be estimated. For cadmium(II) complexes with thione (C=S) or selone (C=Se) groups coordinated in Cd(S/Se)O5 or Cd(S/Se)2O4 (O from MeOH or CF3SO3-) environments the 113Cd chemical shifts were quite similar, within 93-97 ppm and 189 – 193 ppm, respectively. However, the difference in the chemical shift for the Cd(SeU)42+ (578 pm) and Cd(TU)42+ (526 ppm) species, with CdSe4 and CdS4 coordination, respectively, shows less chemical shielding for the coordinated Se atoms than for S, in contrast to the common trend with increasing shielding in the order: O > N > Se >S. In solutions dominated by mono- and tetra-thiourea / selenourea complexes, their coordination and bond distances could be evaluated by Cd K-edge extended X-ray absorption fine structure (EXAFS) spectroscopy. At ~200 K and high excess of thiourea a minor amount (up to ~30%) of [Cd(TU)5-6]2+ species was detected by an upfield shift of the 113Cd NMR signal (up to 423 ppm) and an amplitude reduction of the EXAFS oscillation. The amount was estimated by fitting linear combinations of simulated EXAFS spectra for [Cd(TU)4]2+ and [Cd(TU)6]2+ complexes. At room temperature, [Cd(TU)4]2+ was the highest complex formed, also in aqueous solution. Cd L3-edge X-ray absorption near edge structure (XANES) spectra of cadmium(II) thiourea solutions in methanol were used to follow changes in the CdSxOy coordination at room temperature. The correlations found from the current and previous studies between 113Cd NMR chemical shifts and different Cd(II) coordination environments are generally useful for evaluating cadmium coordination to thione-containing or Se-donor ligands in biochemical systems or for monitoring speciation in solution.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cadmium(II) Complex Formation with Selenourea and Thiourea in Solution: An XAS and ¹¹³Cd NMR Study

2012

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“…CdSe exhibits two different polymorph modifications namely cubic and hexagonal. The cubic phase of CdSe changes into hexagonal structure in the temperature range of 350-400 C. Different techniques are utilized for the synthesis of CdSe nanostructures such as molecular beam epitaxy, [8] vacuum deposition, [9] chemical vapor deposition, [10] brush plating, [11] spray pyrolysis, [12] and electrodeposition technique. [13] Major attention has been given in the investigation of CdSe nanostructures in recent years to fine-tune its structural and electronic properties during the synthesis stage itself.…”

Section: Introductionmentioning

confidence: 99%

Influence of Oxygen, Tellurium, and Zinc Substitution on CdSe Nanoribbon: A First-Principles Investigation

Chandiramouli

Sriram

Nagarajan

2015

Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-

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The electronic transport property and band structure of pure cadmium selenide, oxygen, tellurium, and zinc substituted CdSe nanoribbon and defect structured CdSe nanoribbon are studied using density functional theory. The band structure of pure, oxygen, tellurium, and zinc substituted CdSe nanoribbon and defect structured nanoribbon shows a metallic behavior. The localization of charges in the valence band and conduction band is analyzed by the density of states spectrum. The electronic transport properties of CdSe nanoribbon are investigated in terms of transmission spectrum. The transmission can be modified with the substitution impurities such as oxygen, tellurium and zinc in the nanostructure.

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“…Among these, CdSe has been extensively investigated for its potential applications in photoelectrochemical (PEC) solar cells, optoelectronic devices, thin film transistors and gamma ray detectors [4]. CdSe thin films have been deposited earlier by several techniques like thermal evaporation [5], pulse laser deposition [6], electrodepsoition [7], spray pyrolysis [8], successive ionic layer adsorption (SILAR) [9] and chemical bath deposition [10]. In an earlier report on pulse deposited CdSe films, the films were deposited by constant potential method.…”

Section: Introductionmentioning

confidence: 99%

Deposition of CdSe Films by Pulsed Galvanostatic Electrodeposition and their Properties

Ananthi¹,

Dhanpandian

Muthukumarasamy³

et al. 2013

AMR

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Cadmium Selenide (CdSe) thin films were pulse electrodeposited at room temperature and at different duty cycles in the range of 6 – 50 % at a current density of 100 mA cm-2. XRD patterns of films deposited at different duty cycles exhibit the cubic structure. The peak widths decreased with increase of duty cycle. The crystallite size increased from 8 to 20 nm. Microstructural parameters like dislocation density and strain were calculated. The transmission spectra exhibit interference fringes. Refractive index calculated by the envelope method varied in the range of 2.5 to 3.3.The optical band gap increased from 1.84 eV to 2.06 eV with increase of duty cycle.

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Properties of CdSe films produced via spray pyrolysis of [Cd((NH2)2CSe)2Cl2]

Cited by 13 publications

References 15 publications

Cadmium(II) Complex Formation with Selenourea and Thiourea in Solution: An XAS and ¹¹³Cd NMR Study

Cadmium(II) Complex Formation with Selenourea and Thiourea in Solution: An XAS and ¹¹³Cd NMR Study

Influence of Oxygen, Tellurium, and Zinc Substitution on CdSe Nanoribbon: A First-Principles Investigation

Deposition of CdSe Films by Pulsed Galvanostatic Electrodeposition and their Properties

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Properties of CdSe films produced via spray pyrolysis of [Cd((NH2)2CSe)2Cl2]

Cited by 13 publications

References 15 publications

Cadmium(II) Complex Formation with Selenourea and Thiourea in Solution: An XAS and 113Cd NMR Study

Cadmium(II) Complex Formation with Selenourea and Thiourea in Solution: An XAS and 113Cd NMR Study

Influence of Oxygen, Tellurium, and Zinc Substitution on CdSe Nanoribbon: A First-Principles Investigation

Deposition of CdSe Films by Pulsed Galvanostatic Electrodeposition and their Properties

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Product

Resources

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Cadmium(II) Complex Formation with Selenourea and Thiourea in Solution: An XAS and ¹¹³Cd NMR Study

Cadmium(II) Complex Formation with Selenourea and Thiourea in Solution: An XAS and ¹¹³Cd NMR Study