Index Catalog // ScholarsArchive@OSU

Assessment of High Mobility Oxide Thin-Film Transistors

Creator:: Stewart, Kevin A.
Abstract:: The trend towards higher resolution, faster refresh rate active-matrix liquid-crystal displays (AMLCDs) as well as the emergence of active-matrix organic light-emitting diode (AMOLED) displays is driving the demand for amorphous oxide semiconductor thin-film transistors (AOS TFTs) with higher mobility. A physics-based model for carrier transport in an amorphous semiconductor is...
Resource Type:: Dissertation

DC/AC Stability of In-Ga-Zn-O Thin-Film Transistors

Creator:: Zhou, Fan
Abstract:: The electrical stability of amorphous indium-gallium-zinc oxide (a-IGZO) thinfilmtransistors (TFTs) is investigated for flat-panel display applications. Althoughproducts incorporating a-IGZO TFT backplanes are already commercially available,e.g., iMac with 5K retina display, technical challenges need to be addressed for nextgenerationapplications, e.g., active-matrix organic light-emitting diode displays.Device stability is one crucial issue. The...
Resource Type:: Dissertation

Development of Amorphous Metal Thin Films for Thermal Inkjet Printing and Microelectronics

Creator:: McGlone, John M.
Abstract:: Due to a lack of grain boundaries, an amorphous metal thin film (AMTF) possesses advantageous mechanical properties and enhanced chemical stability that is potentially useful for thermal inkjet (TIJ) printing applications. The use of an AMTF as a TIJ resistor or cavitation plate could lead to a thinner TIJ cavitation...
Resource Type:: Dissertation

Investigation of ultra-thin In-Ga-Zn-O thin-film transistors

Creator:: Chiang, Tsung-Han
Abstract:: The objective of the work reported herein is to explore the impact of decreasing channel thickness on radio-frequency (RF) sputtered amorphous indium-gallium-zinc oxide (a-IGZO) thin-ﬁlm transistors (TFTs) electrical performance through the evaluation of drain current versus gate voltage (I[subscript D] − V[subscript G]) transfer curves. For a ﬁxed set of...
Resource Type:: Masters Thesis

Al-In-Sn-O thin-film transistors

Creator:: Stewart, Kevin A.
Abstract:: The aim of the research undertaken for this thesis was to develop a new high-performance amorphous oxide semiconductor (AOS) for use as a channel layer in a thin-film transistor (TFT). AOS TFTs offer higher electron mobility than the established amorphous silicon based technology. A new channel material comprised of aluminum...
Resource Type:: Masters Thesis

Amorphous metal thin films as a platform for solution processing

Creator:: Landau, Nicholas P.
Abstract:: The research presented herein represents an effort to combine the ultra-smooth surface of an amorphous metal thin ﬁlm (AMTF) with a solution-processed dielectric synthesized via prompt inorganic condensation (PIC). Analysis of dielectric ﬁlm quality is carried out via electrical measurements of metal-insulator-metal (MIM) diodes. Anneals at 500 and 700 °C...
Resource Type:: Masters Thesis

Development of high efficiency solar absorbers

Creator:: Ravichandran, Ram
Abstract:: Current cadmium telluride and copper indium gallium diselenide thin-film solar cells (TFSCs) utilize thick absorbers (2 - 4 μm). For efficient carrier extraction in these TFSCs, the absorber layer requires high carrier mobilities and a long minority carrier lifetime, which necessitates the use of a high purity, defect-free thin film....
Resource Type:: Dissertation

Thermally-stable amorphous metal thin films

Creator:: McGlone, John M.
Abstract:: Amorphous metal thin films (AMTFs) are of potential use for metal-insulator-metal (MIM) tunnel diode applications due to their ultra-smooth surfaces, a consequence of their amorphous microstructure. The objective of this thesis is to design a thermally-stable AMTF capable of maintaining MIM tunnel diode performance after a post-deposition anneal in excess...
Resource Type:: Masters Thesis

Diamond-like carbon films for electroluminescent applications

Creator:: Kim, Seung-bae
Abstract:: White electroluminescence (EL) was observed for the first time from diamond-like carbon (DLC) films at room temperature. Electroluminescence was observed by the application of ac voltages in excess of 200 V to a metal-insulator- semiconductor (i.e. DLC)-insulator-metal (MISIM) device structure. For EL applications, three types of the DLC films were...
Resource Type:: Masters Thesis

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

Instabilities in InP MIS capacitors

Creator:: Juang, Min Tzuan
Abstract:: The drain current of InP MISPETs is often observed to decrease as a function of time after the application of a positive gate bias which involves an accumulation of electrons in the channel. Various models have been proposed for this drain current drift (DCD) phenomenon. In this thesis, variable-temperature bias-stress...
Resource Type:: Masters Thesis

Surface recombination velocity and bulk lifetime in GaAs and InP

Creator:: Rastegar, Bahador
Abstract:: An analytical expression is derived which allows the bulk minority carrier recombination lifetime, t, and the surface recombination velocity, S, to be extracted from a single noncontact photoconductivity decay (PCD) measurement. This analytical expression is rather complex, but can be reduced to a first order approximation. The first order approximation...
Resource Type:: Masters Thesis

Improved stability in ACTFEL devices

Creator:: Khormaei, Iranpour
Abstract:: The stability of ZnS:Mn AC thin film Electroluminescence (ACEFEL) devices as demonstrated by the brightness-voltage (BV) characteristics is discussed. Two procedures for improvement of the stability are demonstrated. The first method is the addition of a CaS buffer layer to one or both interfaces of the ZnS active phosphor layer....
Resource Type:: Masters Thesis

Numerical simulation of Al [subscript x] Ga [subscript 1-x] As/GaAs and (Al [subscript x] Ga [subscript 1-x]) [subscript 0.47] In [subscript 0.53] As/InP bandgap engineered solar cells

Creator:: Kamdar, Pravin P.
Resource Type:: Masters Thesis

A study of deep levels of AlGaAs/GaAs heterojunction bipolar transistors

Creator:: Huang, Chun-ta
Abstract:: A study of deep levels of the emitter region of a heterojunction bipolar transistor is investigated using deep level transient spectroscopy (DLTS), deep level admittance spectroscopy (DLAS), thermally stimulated capacitance (TSCAP), and capacitance-voltage (C-V) profiling. The DX center, with an activation energy of 0.45 eV, is the only deep level...
Resource Type:: Masters Thesis

Electrical characterization of n-type aluminum gallium arsenide

Creator:: Kim, Seung-bae
Resource Type:: Dissertation

Internal charge-phosphor field analysis, electrical characterization, and aging studies of AC thin-film electroluminescent devices

Creator:: Abu-Dayah, Ahmad I.
Resource Type:: Masters Thesis

Design, fabrication, and testing of inhomogeneous dielectrics

Creator:: Lim, Sungkyoo
Abstract:: In this thesis the concept of inhomogeneous dielectrics is demonstrated for various optical coating applications. Compositionally-varying silicon oxynitride (SiON) dielectric layers, with the refractive index varying as a function of position, are grown by computer-controlled plasma-enhanced chemical vapor deposition (PECVD) using silane, nitrogen, and nitrous oxide reactant gases. Compositionally graded...
Resource Type:: Dissertation

Alternating-current thin-film electroluminescent device physics and modeling

Creator:: Douglas, Allan A.
Abstract:: Alternating-current thin-film electroluminescent (ACTFEL) devices are used in the formation of pixels in flat panel displays. ACTFEL flat panel displays have many advantages over other flat panel technologies. Specifically, ACTFEL panels are emissive displays, they have high brightness, wide viewing angles, and rugged construction. Although much is already known about...
Resource Type:: Masters Thesis

Phosphor development for alternating-current thin-film electroluminescent applications

Creator:: Nguyen, Tin T.
Resource Type:: Masters Thesis

Hot carrier degradation of sub-micron n-channel MOSFETs subject to static stress

Creator:: Aminzadeh, Payman G.
Abstract:: Hot carrier effects in sub-micron lightly doped drain (LDD) n-channel MOSFETs under static (DC) stress are studied in order to establish the degradation mechanisms of such devices. Degradation is monitored as a function of time at various gate voltages. Under accelerated aging conditions (i.e. large drain voltages) the gate voltage...
Resource Type:: Masters Thesis

ACTFEL phosphor deposition by RF sputtering

Creator:: Ang, Wie Ming
Resource Type:: Masters Thesis

Development and characterization of AlInN as an alternating-current thin-film electroluminescent display phosphor

Creator:: Mueller, Matthew R.
Resource Type:: Masters Thesis

Electrical characterization and aging studies of green ZnS: Tb AC thin-film electroluminescent devices

Creator:: Kumar, Manoj, 1972-
Resource Type:: Masters Thesis

High resolution electroluminescent display using active matrix approach

Creator:: Khormaei, Iranpour
Resource Type:: Dissertation

Characterization of alternating-current thin-film SrS:Ce electroluminescent devices

Creator:: Thuemler, Robert L.
Resource Type:: Masters Thesis

Electrical characterization, maximum charge-maximum voltage (Q[max]-V[max]) analysis, aging and temperature studies of thiogallate thin-film electroluminescent devices

Creator:: Pham, Long V.
Resource Type:: Masters Thesis

Electrical characterization and aging studies of ALE ZnS:Mn ACTFEL devices with varying phosphor thicknesses

Creator:: Shih, Shou-Po
Resource Type:: Masters Thesis

Modeling phosphor space charge in alternating-current thin-film electroluminescent devices

Creator:: Keir, Paul D.
Abstract:: The accomplishments presented in this thesis are the development of three models for simulation of space charge generation in the phosphor layer of alternating current thin-film electroluminescent (ACTFEL) devices and the results from simulation of these models. First, a single sheet charge model is developed and simulated. The single sheet...
Resource Type:: Masters Thesis

Sine burst waveform aging and electro-optic characterization of ALE ZnS:Mn ACTFEL devices for head-mounted active matrix displays

Creator:: Mendes, James Kevin
Resource Type:: Masters Thesis

Novel ACTFEL phosphor development

Creator:: Ang, Wie Ming
Abstract:: The goal of this thesis is to identify and to explore novel ACTFEL phosphor materials. Several important materials properties relevant to ACTFEL phosphor development are identified. All of these properties cannot be obtained simultaneously. Therefore, several key phosphor materials properties are identified as critical to the development of an ACTFEL...
Resource Type:: Dissertation

State space modeling of alternating-current thin-film electroluminescent devices

Creator:: Peery, Jeffrey B.
Resource Type:: Masters Thesis

Static space charge in evaporated ZnS:Mn alternating-current thin-film electroluminescent devices

Creator:: Hitt, John C.
Resource Type:: Masters Thesis

Nontraditional amorphous oxide semiconductor thin-film transistor fabrication

Creator:: Sundholm, Eric Steven
Abstract:: Fabrication techniques and process integration considerations for amorphous oxide semiconductor (AOS) thin-film transistors (TFTs) constitute the central theme of this dissertation. Within this theme three primary areas of focus are pursued. The first focus involves formulating a general framework for assessing passivation. Avoiding formation of an undesirable backside accumulation layer...
Resource Type:: Dissertation

Active matrix electroluminescent device power considerations

Creator:: Beck, Douglas
Abstract:: An active-matrix electroluminescent (AMEL) design tool has been developed for the simulation of AMEL display devices. The AMEL design tool is a software package that simulates AMEL device operation using a lumped parameter circuit model. The lumped parameter circuit model is developed primarily to address AMEL power dissipation issues. The...
Resource Type:: Masters Thesis

Fabrication and characterization of ACTFEL devices

Creator:: Keir, Paul D.
Abstract:: The goal of this thesis is the identification and synthesis of high-luminance, primary color alternating-current thin-film electroluminescent (ACTFEL) devices. Special attention is paid to the synthesis of primary color green ACTFEL devices because of the lack of an adequate primary green ACTFEL phosphor and the dominance of green wavelengths in...
Resource Type:: Dissertation

Characterization of organic light-emitting devices

Creator:: Norris, Benjamin J.
Abstract:: In this thesis steady-state (i.e. steady-state with respect to the applied voltage waveform) transient current-transient voltage [i(t)-v(t)], transient brightness-transient current [b(t)-i(t)], transient brightness-transient voltage [b(t)-v(t)], transient current [i(t)], transient brightness [b(t)], and detrapped charge analysis are introduced as novel organic light emitting device (OLED) characterization methods. These analysis methods involve...
Resource Type:: Masters Thesis

ACTFEL device simulation with impact ionization using a two-sheet charge model

Creator:: Bouchard, Anthony F.
Abstract:: The main achievement of this thesis is the development of a two-sheet charge simulation model with space charge creation by trap-to-band impact ionization to describe the electrical characteristics of alternating-current thin-film electroluminescent (ACTFEL) devices. The two-sheet charge model localizes all of the space charge in the phosphor region of an...
Resource Type:: Masters Thesis

Electro-optical characterization of SrS:Ce, SrS:Cu, and SrS:Cu,Ag alternating-current thin-film electroluminescent devices

Creator:: Grudzinsky, Arkady S.
Abstract:: The purpose of this thesis is to contribute to the understanding of SrS-based alternating-current thin-film electroluminescent (ACTFEL) device operation. Three main accomplishments serving this purpose are presented in this thesis. First, two new methods are developed for estimation of insulator capacitance in ACTFEL devices possessing a large amount of dynamic...
Resource Type:: Masters Thesis

Novel phosphor development for alternating-current thin-film electroluminescent devices

Creator:: Maddix, Crystal M.
Resource Type:: Masters Thesis

SPICE modeling of ACTFEL devices and OLEDs

Creator:: Bender, Jeffrey P.
Abstract:: The achievements of this thesis are the development of several models for the SPICE (Simulation Program with Integrated Circuit Emphasis) simulation of alternating-current thin-film electroluminescent (ACTFEL) devices, organic light-emitting devices (OLEDs), and polymer light-emitting devices (PLEDs). First, an ACTFEL model based on the built-in HSPICE Fowler-Nordheim tunneling diode is developed,...
Resource Type:: Masters Thesis

Oxide phosphors deposited by activated reactive evaporation for ACTFEL device applications

Creator:: Yokoyama, Tomoe
Abstract:: The goal of this thesis study is to develop an activated reactive evaporation (ARE) system and to demonstrate its utility by fabricating-alternating current thin-film electroluminescent (ACTFEL) oxide phosphor devices. ARE entails evaporation in an activated gas. The main ARE system components are three thermal evaporation sources, a microwave power supply,...
Resource Type:: Masters Thesis

An n-sheet, state-space ACTFEL device model

Creator:: Hitt, John C.
Abstract:: The objective of the research presented in this thesis is to develop, implement, and demonstrate the utility of an n-sheet, state-space alternating-current thin-film electroluminescent (ACTFEL) device model. In this model, the phosphor layer is discretized into n + 1 layers, with band-to-band impact ionization, space charge creation/ annihilation, and luminescent...
Resource Type:: Dissertation

Development, fabrication, and characterization of transparent electronic devices

Creator:: Hoffman, Randy L.
Abstract:: The objective of this thesis is to provide an initial demonstration of the feasibility of constructing highly transparent active electronic devices. Such a demonstration is successfully achieved in the fabrication of ZnO-based thin film transistors (TFTs) exhibiting transparency greater than ~90% in the visible portion of the electromagnetic spectrum and...
Resource Type:: Masters Thesis

Physical vapor deposition of novel thin-film solar absorbers

Creator:: Waters, Benjamin E.
Abstract:: Current leading thin-film solar cell technologies, i.e., cadmium telluride (CdTe) and copper indium gallium diselenide (CIGS), employ elements which are either toxic (Cd), or rare and/or expensive (In, Te, Ga, and Cd). The aim of this thesis is to investigate new, abundant, non-toxic p-type semiconductors for potential solar absorber application....
Resource Type:: Masters Thesis

Fabrication process assessment and negative bias illumination stress study of IGZO and ZTO TFTs

Creator:: Hoshino, Ken
Abstract:: Indium-gallium-zinc oxide (IGZO) and zinc-tin oxide (ZTO) are investigated for thin-film transistor (TFT) applications. Negative bias illumination stress (NBIS) is employed for electrical stability assessment. Unpassivated IGZO and ZTO TFTs suffer from severe NBIS instabilities. Zinc-tin-silicon oxide is found to be an effective passivation layer for IGZO and ZTO TFTs,...
Resource Type:: Dissertation

Manufacture and characterization of novel ACTFEL materials and devices

Creator:: Bender, Jeffrey P.
Abstract:: The aim of this dissertation is to develop non-traditional approaches to alternating-current thin-film electroluminescent (ACTFEL) device fabrication. ACTFEL technology suffers from a lack of adequately bright and efficient primary-color phosphors and cannot presently compete in the low-cost display market. Therefore the research presented in this dissertation focuses on an exploration...
Resource Type:: Dissertation

Development of zinc tin oxide-based transparent thin-film transistors

Creator:: Chiang, Hai Q.
Abstract:: The focus of this thesis involves development of highly transparent, n-channel, accumulation- mode thin-film transistors employing a zinc tin oxide (ZTO) channel layer. ZTO-based transparent thin-film transistors (TTFTs) show improved device performance compared to ZnO-based TTFTs. An estimated peak effective mobility for these devices as high as ~100 cm² V⁻¹sec⁻¹...
Resource Type:: Masters Thesis

Characterization of solution-based inorganic semiconductor and dielectric materials for inkjet printed electronics

Creator:: Munsee, Craig L.
Abstract:: The long-term goal of this research project is the development of solution-based inorganic dielectric and semiconductor materials for inkjet printed electronics. The main focus of this thesis involves testing of the materials and devices under development. A new solution-based inorganic dielectric material (HfOSO₄), given the name hafsox, is developed and...
Resource Type:: Masters Thesis

Process development and modeling of thin-film transistors

Creator:: Hong, David
Abstract:: A class of high-performance thin-film transistor (TFT) channel materials has emerged involving oxides composed of heavy-metal cations (HMCs) with (n-1)d¹⁰ns⁰ (n≥4) electronic configurations. This thesis is devoted to the pursuit of three topics involving the development of these materials for TFT applications: modeling TFT currentvoltage characteristics, an exploratory method for...
Resource Type:: Masters Thesis

Search Constraints

Search Results

Limit your search