Index Catalog // ScholarsArchive@OSU

Hybrid Multiscale Methods with Applications to Semiconductors, Porous Media, and Materials Science

Creator:: Costa, Timothy B.
Abstract:: In this work we consider two multiscale applications with tremendous computational complexity at the lower scale. First, we examine a model for charge transport in semicon- ductor structures with heterojunction interfaces. Due to the complex physical phenomena at the interface, the model at the design scale is unable to adequately...
Resource Type:: Dissertation
Full Text:: my committee members Dr. Ralph Showalter, Dr. Robert Higdon, Dr. Mina Ossiander and Dr. Dorthe

New multi-functional chalcogenides for photovoltaic and thermoelectric materials

Creator:: Heo, Jaeseok
Abstract:: The subject of this PhD thesis is part of a research domain of great present interest in new semiconductor materials for photovoltaic and thermoelectric applications. This domain contains the elaboration and the study of both Cu-based chalcogenides bulk and thin-film samples, driven by materials design principles. One of the most...
Resource Type:: Dissertation
Full Text:: my collaborators, I will never forget the efforts made by Robert Kokenyesi in stimulating my

Iron and copper chalcogenides : photovoltaic absorber candidates and YZrF7 : a new upconversion host, Iron and copper chalcogenides : photovoltaic absorber candidates and YZrF₇ : a new upconversion host

Creator:: Jieratum, Vorranutch
Abstract:: The materials Fe₂(Si,Ge)(S,Se)₄, Cu₃PS[subscript 4-x]Se[subscript x] (0 ≤ x ≤ 4), and Cu₃PxAs[subscript 1-x]S₄ (0 ≤ x ≤ 1) have been synthesized and studied as new earth-abundant absorbers for single and multijunction photovoltaic cells as well as solar fuel generation. The synthesis, single-crystal growth, and optical and electrical properties of...
Resource Type:: Dissertation
Full Text:: assistance. I would like to thank postdocoral researcher, Robert Kokenyesi for his contributions on

Synthesis and Analysis of Heterostructural Semiconductor Alloy Sn1-xCaxCh (Ch=S, Se) and Nitrides Zn1-xWxN and Zn1-x(W1-yMoy)xN

Creator:: Matthews, Bethany E.
Abstract:: This work explores the synthesis and characterization of the metastable alloys Sn1-xCaxCh (Ch= S, Se) and nitride compounds Zn-W-Mo-N, which have recently been predicted by theorists. Single phase thin films of Sn1-xCaxS are prepared by pulsed laser deposition and radio-frequency magnetron sputtering and of Sn1-xCaxSe are prepared by pulsed laser...
Resource Type:: Dissertation
Full Text:: passionate to study, and for speaking well of me. I would like to thank Robert Kokenyesi for being so

Temperature Dependence of Cu₃₋xSb₁₋[subscript y]M[subscript y]S₄ (M=Sn,Ge) Resistivity and Thermopower

Creator:: Mutch, Joshua
Abstract:: An experimental apparatus is modified to allow measurements of the Seebeck coefficient and resistivity to be taken simultaneously. This apparatus is designed for bulk and thin film samples between temperatures of 10 K and 300 K. The apparatus is constructed such that these simultaneous measurements do not interfere with each...
Resource Type:: Undergraduate Thesis
Full Text:: guidance, teaching, and mentoring. Dr. Robert Kokenyesi, for providing the bulk Cu4SbS4 samples. Mark

Chalcostibite Copper Antimony Sulfide for Solution Processed Thin Film Solar Cells

Creator:: Lopez, Jonathon I.
Abstract:: Copper antimony sulfide (CAS) is a ternary material that is of research interest for thin film photovoltaic applications due to its high absorption coefficient and tunable bandgap. The material is also ideal for sustainable manufacturing due the constituent elements being earth-abundant and less toxic than solar cell absorbers like gallium...
Resource Type:: Honors College Thesis
Full Text:: 18 Silbey, Robert J., Robert A. Alberty, and Moungi Gabriel Bawendi. Physical Chemistry. Hoboken, NJ

Atomic solid state energy scale applied to novel thin-film solar absorbers

Creator:: Pelatt, Brian D.
Abstract:: The atomic solid state energy (SSE) scale is introduced as a tool for inorganic materials design. The SSE scale is obtained by assessing an average electron affinity (EA) (for a cation) or an average ionization potential (IP) (for an anion) for each atom using data from compounds having that specific...
Resource Type:: Dissertation
Full Text:: thankful for the opportunities that were presented to me as his student. I owe thanks to Dr. Robert

Growth and characterization of the p-type semiconductors SnS and BiCuOSe

Creator:: Francis, Jason
Abstract:: BiCuOSe and SnS are layered, moderate band gap (ε[subscript G] ≈ 1 eV) semiconductors that exhibit intrinsic p type conductivity. Doping of BiCuOSe with Ca results in a slight expansion of the lattice and an increase of the hole concentration from 10¹⁸ cm⁻³ to greater than 10²⁰ cm⁻³. The large...
Resource Type:: Dissertation
Full Text:: prepared by Robert Kokenyesi and Jaeseok Heo from Doug Keszler’s group. TABLE OF CONTENTS Page 1

Transition metal solar absorbers

Creator:: Altschul, Emmeline Beth
Abstract:: A new approach to the discovery of high absorbing semiconductors for solar cells was taken by working under a set of design principles and taking a systemic methodology. Three transition metal chalcogenides at varying states of development were evaluated within this framework. Iron pyrite (FeS₂) is well known to demonstrate...
Resource Type:: Masters Thesis
Full Text:: to pursue this research. I learned so much from Robert Kokenyesi and Vorra”nutch” Jieratum that

Heterojunction Assisted Impact Ionization at the ZnS/Si Interface and Cu_10Te_4S_13 Photodiodes

Creator:: Reidy, Christopher F.
Abstract:: Several topics are presented in this dissertation, each of which has applications to solar cells and photodetectors. First, we discuss the growth of Cu10Te4S13, copper tellurium tetrahedrite. This material has interesting optical properties; it has a large joint density of states at the conduction band maximum and valence band minimum,...
Resource Type:: Dissertation
Full Text:: . Robert Kokenyesi captured secondary neutral mass spectroscopy data for a stoichiometry measurement

ScholarsArchive@OSU

Hybrid Multiscale Methods with Applications to Semiconductors, Porous Media, and Materials Science

New multi-functional chalcogenides for photovoltaic and thermoelectric materials

Iron and copper chalcogenides : photovoltaic absorber candidates and YZrF7 : a new upconversion host, Iron and copper chalcogenides : photovoltaic absorber candidates and YZrF₇ : a new upconversion host

Synthesis and Analysis of Heterostructural Semiconductor Alloy Sn1-xCaxCh (Ch=S, Se) and Nitrides Zn1-xWxN and Zn1-x(W1-yMoy)xN

Temperature Dependence of Cu₃₋xSb₁₋[subscript y]M[subscript y]S₄ (M=Sn,Ge) Resistivity and Thermopower

Chalcostibite Copper Antimony Sulfide for Solution Processed Thin Film Solar Cells

Atomic solid state energy scale applied to novel thin-film solar absorbers

Growth and characterization of the p-type semiconductors SnS and BiCuOSe

Transition metal solar absorbers

Heterojunction Assisted Impact Ionization at the ZnS/Si Interface and Cu_10Te_4S_13 Photodiodes

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