Improved CdS buffer/window layers for thin film solar cells

Chemseddine, A.; Fearheiley, M. L.

doi:10.1016/0040-6090(94)90468-5

Cited by 20 publications

(17 citation statements)

References 14 publications

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“…[11,12] vide new types of precursors for the processing of highly Nanocrystals can be isolated according to size in the form nanostructured titania-based materials. [8] of soluble, processable, manageable powders, or used as precursors in the processing of films. [13] structured arrays of functional nanocrystals is of central importance for the evaluation of the competitiveness of wet chemistry, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…sol-gel processes or solution techniques, since through the size, shape, and organization of particles, organic species can be confined within well-defined inorganic structures, allowing control over their thermal removal. [8,14] One of the problems encountered in making titania is the high reactivity of the available precursors, such alkoxides or chlorides, toward water. [15] The reaction invariably leads to a mixture of different polymeric species, which assume a variety of structures and sizes, and finally to an amorphous solid.…”

Section: Introductionmentioning

confidence: 99%

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Nanostructuring Titania: Control over Nanocrystal Structure, Size, Shape, and Organization

Chemseddine¹,

Möritz

1999

Eur. J. Inorg. Chem.

186

257

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Dedicated to Professor J. Rouxel in recognition of his important contributions to the chemistry of solids Keywords: TiO 2 / Growth / Self-organisation / Polytitanate / Nanocrystals / Nanostructure / Superlattice / Films Control over crystal structure, size, shape, and organization titania films. Furthermore, larger anatase TiO 2 nanocrystals of different sizes and shapes have been obtained by of TiO 2 nanocrystals has been achieved by means of wet chemistry. Hydrolysis and polycondensation of titanium adjusting the relative concentrations of titanium alkoxide and Me 4 NOH, the reaction temperature, and the pressure. alkoxide [Ti(OR) 4 ] has been performed in the presence of tetramethylammonium hydroxide (Me 4 NOH). This base both HRTEM, XRD, and EXAFS have been used to characterize the various samples and to elucidate the growth of titania catalyzes the reaction and provides an organic cation that stabilizes the anatase polyanionic cores formed in this anatase. Our observations are in accordance with theoretically predicted condensation and growth pathways. medium. These anatase clusters are organized so as to favour self-assembly into intermediate nanocrystals, which, in turn, The formation of mesoscopic structures through a selfassembling process of the multiply charged polytitanate self-assemble into superlattices. This self-assembling process has been exploited for the processing of highly structured anions in the presence of Me 4 N + is also discussed.The fundamental physical properties of such nanoscale Furthermore, a major line of development of this chemis- [a] Hahnarchitecture by the self-assembly of suitably designed and [b] Present adress: Atotec,

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanostructuring Titania: Control over Nanocrystal Structure, Size, Shape, and Organization

Chemseddine¹,

Möritz

1999

Eur. J. Inorg. Chem.

186

257

View full text Add to dashboard Cite

show abstract

“…[11,12] vide new types of precursors for the processing of highly Nanocrystals can be isolated according to size in the form nanostructured titania-based materials. [8] of soluble, processable, manageable powders, or used as precursors in the processing of films. [13] Furthermore, a major line of development of this chemis-structured arrays of functional nanocrystals is of central importance for the evaluation of the competitiveness of wet chemistry, i.e.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanostructuring Titania: Control over Nanocrystal Structure, Size, Shape, and Organization

Chemseddine

Möritz

1999

Eur. J. Inorg. Chem.

372

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Control over crystal structure, size, shape, and organization of TiO2 nanocrystals has been achieved by means of wet chemistry. Hydrolysis and polycondensation of titanium alkoxide [Ti(OR)4] has been performed in the presence of tetramethylammonium hydroxide (Me4NOH). This base both catalyzes the reaction and provides an organic cation that stabilizes the anatase polyanionic cores formed in this medium. These anatase clusters are organized so as to favour self‐assembly into intermediate nanocrystals, which, in turn, self‐assemble into superlattices. This self‐assembling process has been exploited for the processing of highly structured titania films. Furthermore, larger anatase TiO2 nanocrystals of different sizes and shapes have been obtained by adjusting the relative concentrations of titanium alkoxide and Me4NOH, the reaction temperature, and the pressure. HRTEM, XRD, and EXAFS have been used to characterize the various samples and to elucidate the growth of titania anatase. Our observations are in accordance with theoretically predicted condensation and growth pathways. The formation of mesoscopic structures through a self‐assembling process of the multiply charged polytitanate anions in the presence of Me4N+ is also discussed.

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“…The use of functionalized nanoclusters and nanocluster assemblies as precursors for the controlled processing of organized materials is a very promising approach in modern material research. − The nanocluster building method permits one to overcome problems inherent to atomic or molecular deposition methods, such as distribution of size and shape as well as the random orientation of grains in polycrystalline films. , Nanometer-scale crystallites produced in solutions by organometallic methods can be manipulated so that they are chemically connected by ligands and can form well-organized assemblies. These nanocluster assemblies can be processed into organized films using the “Doctor blade” technique. , In the case of cadmium sulfide, this organization is achieved by clusters capped with a combination of thiolates and acetates …”

Section: Introductionmentioning

confidence: 99%

Investigation of the Nanocluster Self-Assembly Process by Scanning Tunneling Microscopy and Optical Spectroscopy

Chemseddine¹,

Jungblut²,

Boulmaâz³

1996

J. Phys. Chem.

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Improved CdS buffer/window layers for thin film solar cells

Cited by 20 publications

References 14 publications

Nanostructuring Titania: Control over Nanocrystal Structure, Size, Shape, and Organization

Nanostructuring Titania: Control over Nanocrystal Structure, Size, Shape, and Organization

Nanostructuring Titania: Control over Nanocrystal Structure, Size, Shape, and Organization

Investigation of the Nanocluster Self-Assembly Process by Scanning Tunneling Microscopy and Optical Spectroscopy

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