Index Catalog // ScholarsArchive@OSU

Synthesis and characterization of new optical frequency converters and phosphor hosts

Creator:: Akella, Annapoorna
Resource Type:: Dissertation
Full Text:: were identified by powder X-ray diffraction by using an automated Philips powder diffractometer

Aqueous niobium chemistry at low pH : new precursors for oxide thin films

Creator:: Park, Deok-Hie
Abstract:: Phosphate and peroxide stabilize new oxo-hydroxo niobium clusters in water at low pH. The clusters open a new chapter in aqueous niobium chemistry under acidic conditions. The clusters also produce atomically smooth, amorphous niobium oxide phosphate (NbPOx) thin films. Reaction pathways from cluster solutions to amorphous niobium oxide phosphate solids...
Resource Type:: Dissertation
Full Text:: )6]·7H2O, were determined by X-ray crystallography. Solution speciation and cluster stability as a

Metal-oxo Clusters as Novel Photolithographic Materials: How Understanding the Chemistry of HafSOx Informs Next-Generation Patterning Systems

Creator:: Amador, Jenn M.
Abstract:: The solution chemistry and kinetic behavior of hafnium peroxy sulfate solutions ("HafSOx") is described in terms of peroxide content and solution speciation. Additionally, thin film behavior, including thermal behavior and solubility, is characterized, and a mechanism of patterning is presented, as well as parameters that should be considered when looking...
Resource Type:: Dissertation
Full Text:: deserves mention here, as well. Dr. Michael Lerner, Dr. Brady Gibbons, Dr. David Ji and Dr. David

Deposition and characterization of transition metal oxides from aqueous solution

Creator:: Betterton, Sharon A.
Abstract:: The aqueous chemistries of two transition metal cations, Zr⁴⁺ and Nb⁵⁺, are examined and then used to develop inorganic precursor solutions. The oxides of these cations (ZrO₂ and Nb₂O₅) are deposited and characterized, and their morphological and optical properties discussed. Due to the obstacles created by niobium's aqueous chemistry, an...
Resource Type:: Masters Thesis
Full Text:: committee, made up of Drs. Doug Keszler, Michael Lerner, Darren Johnson, and David Graham, cannot go

Synthesis and study of transparent p- and n-type semiconductors and luminescent materials

Creator:: Park, Cheol-Hee
Abstract:: New transparent p- and n-type semiconductors and luminescent materials have been prepared and characterized. Synthesis, structures, optical and electrical properties of new chalcogenide fluoride p-type transparent semiconductors MCuQF (M=Ba, Sr; Q=S, Se, Te) are described. Band-gap tuning and improvement in conductivity through p-type doping are demonstrated in the family. The...
Resource Type:: Dissertation
Full Text:: properties of new potential X-ray phosphors Lu2O2S:Ln3 (Ln=Eu, Tb) are summarized. ©Copyright by Cheol

Reaction Pathways of Oxo-Hydroxo Group 5 Clusters to Metal Oxide Thin Films

Creator:: Mansergh, Ryan H.
Abstract:: Oxo-hydroxo Group 5 metal clusters are an untapped resource to study and advance aqueous solution processing of metal oxide thin films. The tetramethylammonium (TMA) hexatantalate salt (TMA6[H2Ta6O19]) yields dense Ta2O5 films (~95% of the bulk ß-Ta2O5 density) with atomically smooth surfaces (<4 Å root mean square surface roughness). This same...
Resource Type:: Dissertation
Full Text:: Ha-Yeon Cheong, David Xiulei Ji, May Nyman, Prasad Tadepalli, and John F. Wager, whose diverse

High quantum-yield phosphors via quantum splitting and upconversion

Creator:: Jeong, Joayoung
Abstract:: The Gd3+ ion has been used to induce quantum splitting in luminescent materials by using cross-relaxation energy transfer (CRET). In Nd:LiGdF4, quantum splitting results from a two-step CRET between Gd3+ and Nd3+, first involving a transition 6G→6I on Gd3+ and an excitation within the 4f3 configuration of Nd3+ followed by...
Resource Type:: Dissertation
Full Text:: material GdZrF7 were grown, and its structure was established via single-crystal X-ray diffraction

New luminescent materials and high-performance solution-processed oxide thin films

Creator:: Jiang, Kai
Abstract:: Crystals of an incongruent-melting compound, Ba₃MgSi₂O₈, were grown by the flux method and its structure was determined by single crystal X-ray diffraction methods. Ba₃MgSi₂O₈ crystallizes in trigonal space group P-3[bar]m1 with a = 5.6123(3) Å, c = 7.2667(9) Å and Z = 1. Eu²⁺ ions prefer one crystallographic Ba site...
Resource Type:: Dissertation
Full Text:: crystal X-ray diffraction methods. Ba3MgSi2O8 crystallizes in trigonal space group P 3 m1 with a

A study of new optical materials I. Crystal-chemical development of new optical frequency converters II. New hosts for Cr3+ luminescence and lasing

Creator:: Schaffers, Kathleen I.
Abstract:: The emphasis of this work has been in two areas of optical materials - the crystal-chemical development of new optical frequency converters and the synthesis and study of new hosts for Cr³⁺ luminescence and lasing. A simple method has been developed to identify promising frequency-doubling materials containing triangular oxoanions by...
Resource Type:: Dissertation
Full Text:: synthesized and structurally characterized by single-ciystal X-ray diffraction. Three new alkaline-earth

New, complex group 13 borates : synthesis, structures, and properties

Creator:: Chang, Ki-Seog
Resource Type:: Dissertation
Full Text:: characterized by single-crystal X-ray diffraction methods and luminescence measurements. The anionic-group

ScholarsArchive@OSU

Synthesis and characterization of new optical frequency converters and phosphor hosts

Aqueous niobium chemistry at low pH : new precursors for oxide thin films

Metal-oxo Clusters as Novel Photolithographic Materials: How Understanding the Chemistry of HafSOx Informs Next-Generation Patterning Systems

Deposition and characterization of transition metal oxides from aqueous solution

Synthesis and study of transparent p- and n-type semiconductors and luminescent materials

Reaction Pathways of Oxo-Hydroxo Group 5 Clusters to Metal Oxide Thin Films

High quantum-yield phosphors via quantum splitting and upconversion

New luminescent materials and high-performance solution-processed oxide thin films

A study of new optical materials I. Crystal-chemical development of new optical frequency converters II. New hosts for Cr3+ luminescence and lasing

New, complex group 13 borates : synthesis, structures, and properties

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