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  • 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:
    AN ABSTRACT OF THE DISSERTATION OF Brian D. Pelatt for the

  • Amorphous oxide semiconductors in circuit applications

    Creator:
    McFarlane, Brian Ross
    Abstract:
    The focus of this thesis is the investigation of thin-film transistors (TFTs) based on amorphous oxide semiconductors (AOSs) in two circuit applications. To date, circuits implemented with AOS-based TFTs have been primarily enhancement-enhancement inverters, ring oscillators based on these inverters operating at peak frequencies up to ~400 kHz, and two-transistor...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Brian Ross McFarlane for the degree of

  • 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
    Full Text:
    Professor Gerald A. Smith for serving on my graduate committee and providing useful suggestions. I would

  • 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
    Full Text:
    insightful office conversa- tions and depositing Al2O3. Dr. John Conley and his group, Dr. S. Smith, Dr. N

  • Zinc tin oxide thin-film transistor current mirror circuits

    Creator:
    Feller, Layannah Elizabeth
    Abstract:
    The central focus of this thesis is the design, fabrication and characterization of amorphous oxide semiconductor (AOS) thin-film transistor (TFT) current mirrors. The thin-film deposition and circuit fabrication methods used to realize zinc tin oxide (ZTO) TFT current mirrors are addressed in order to elucidate the processing challenges for this...
    Resource Type:
    Masters Thesis
    Full Text:
    research could be done. Thanks to the great research group of Bill Cowell, Brian Pelatt, Ram Ravichandran

  • Development of oxide semiconductors : materials, devices, and integration

    Creator:
    Chiang, Hai Q.
    Abstract:
    The aim of this dissertation is to develop oxide semiconductors by radio-frequency sputtering for thin-film transistor (TFT) applications. A variety of oxide semiconductors are used as the TFT channel layer, including indium gallium oxide (IGO), zinc tin oxide (ZTO), and indium gallium zinc oxide (IGZO). The variety of materials used...
    Resource Type:
    Dissertation
    Full Text:
    hand that made the day run smoother. Brian McFarlane, Celia Hung, and Daniel Heineck helped run

  • 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
    Full Text:
    group, including Dr. Robert Kokenyesi, Dr. Jaeseok Heo, Dr. Brian Pelatt, and Greg Angelos, has been

  • ACTFEL phosphor deposition by RF sputtering

    Creator:
    Ang, Wie Ming
    Resource Type:
    Masters Thesis
    Full Text:
    Privacy Abstract approved: Dr. John F. W ger In this thesis, a research program with the goal of

  • 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
    Full Text:
    Al2O3. Dr. John Conley and his group, S. Smith, N. Alimardani, D. Austin, and T. Klarr, contributed

  • Development of Cu-based Thin Films for Optoelectronic Applications

    Creator:
    Angelos, Gregory S.
    Abstract:
    CIGS and CdTe based commercial thin-film solar cells (TFSCs) require an absorber thickness greater than 2 µm and 4 µm, respectively, to adequately absorb the solar spectrum. To efficiently extract photoexcited electrons, these TFSCs require relatively defect-free absorbers with high-minority carrier mobility (> 100 cm2V−1s−1) and long lifetime (> 10...
    Resource Type:
    Dissertation
    Full Text:
    5.6 XRD pattern for Cu3SbS4 thin films deposited at 65, 75, 85 W and annealed at 350 ◦C. The secondary

  • 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
    Full Text:
    and assisting with device characterization. I indebted to T. W. Dobson, P. Kamdar, and R. C

  • Instability and temperature-dependence assessment of IGZO TFTs

    Creator:
    Hoshino, Ken
    Abstract:
    Amorphous oxide semiconductors (AOSs) are of great current interest for thin-film transistor (TFT) channel layer applications. In particular, indium gallium zinc oxide (IGZO) is under intense development for commercial applications because of its demonstrated high performance at low processing temperatures. The objective of the research presented in this thesis is...
    Resource Type:
    Masters Thesis
    Full Text:
    other group members, namely Rick Presley, Eric Sundholm, Brian McFarlene, Daniel Heineck, Richard

  • Electrical characterization of n-type aluminum gallium arsenide

    Creator:
    Kim, Seung-bae
    Resource Type:
    Dissertation
    Full Text:
    dislocation networks due to glide after processing with an optical power density of approximately 9 x 104 W

  • 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

  • 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
    Full Text:
    ..................................... 46 2.19 1931 CIE chromaticity coordinates specify color almost completely. Point W on the diagram

  • Transparent electronics : thin-film transistors and integrated circuits

    Creator:
    Presley, Rick E.
    Abstract:
    This thesis focuses on two aspects of transparent electronics, SnO₂ transparent thin-film transistors (TTFTs) and transparent circuits. Both depletion- and enhancement-mode SnO₂ TTFTs are realized. The maximum effective mobility for the depletion- and enhancement-mode devices are 2 cm²V⁻¹s⁻¹ and 0.8 cm²V⁻¹s⁻¹, respectively. A variety of techniques to decrease the carrier...
    Resource Type:
    Masters Thesis
    Full Text:
    given by IDS = (1/2)µCox(W/L)(2(VGS − VON )VDS − V 2 DS), (2.1) where the turn-on voltage (VON ) is

  • 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
    Full Text:
    - tion using 2" diameter sputter targets, a target-to-substrate distance of r7.5 cm, a power of 50 W, a

  • 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
    Full Text:
    thin-films thrust of the CSMC for helping me fabricate all of the solution films. Sean Smith deserves

  • Electronic Conduction Mechanisms in Insulators

    Creator:
    Chiang, Tsung-Han
    Abstract:
    The research presented herein focuses on electrical assessment of oxide thin films as insulators. The current density-electric field (J-E) characteristics of four insulators of dramatically different electrical quality are assessed in terms of their operative electronic conduction mechanisms. Conduction in the two high-quality insulators is dominated by Ohmic conduction and...
    Resource Type:
    Dissertation

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

    Creator:
    Kumar, Manoj, 1972-
    Resource Type:
    Masters Thesis
    Full Text:
    levels of Tb3+. 9 Figure 2.5: ACiPhL model as proposed by Smith [29] 13 Figure 2.6: Davidson's [30

  • 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
    Full Text:
    ] ........................................................ 49 2.28 The ACTFEL device equivalent circuit model proposed by Smith. [1] 50 LIST OF FIGURES

  • 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
    Full Text:
    curves of SAL and DAL TFTs for (a) ITO-AITO, (b) BIO- AITO, and (c) ITO-IGZO channel layers. W/L = 1000

  • p-type transparent electronics

    Creator:
    Valencia, Melinda Marie
    Abstract:
    The objective of this thesis is to contribute to the development of p-type materials for transparent electronics applications. Thin films of ®-BaCu2S2, a p-type semi-transparent semiconductor, are fabricated and characterized. ®-BaCu2S2 has a transmittance of 60% to 80 % in the visible portion of the electromagnetic spectrum. The mobility, conductivity,...
    Resource Type:
    Masters Thesis

  • Alternating-current thin-film electroluminescent device fabrication and characterization

    Creator:
    Baukol, Beau
    Resource Type:
    Dissertation
    Full Text:
    consumed, or luminous efficiency, i, which has units uf Iiiiiieiis per Watt (lmn/W). The luminous

  • 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
    Full Text:
    ................................................... 23 2.13 A basic ACTFEL SPICE model proposed by Smith consisting of two back-to-back Zener diodes

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

    Creator:
    Thuemler, Robert L.
    Resource Type:
    Masters Thesis
    Full Text:
    , is the equivalent SPICE circuit model shown in Fig. 2.6. This model was proposed by Smith [29] and

  • Fabrication and characterization of thin-film transistor materials and devices

    Creator:
    Hong, David
    Abstract:
    A class of inorganic thin-film transistor (TFT) semiconductor materials has emerged involving oxides composed of post-transitional cations with (n-1)d¹⁰ns⁰ (n≥4) electronic configurations. This thesis is devoted to the pursuit of topics involving the development of these materials for TFT applications: Deposition of zinc oxide and zinc tin oxide semiconductor layers...
    Resource Type:
    Dissertation
    Full Text:
    pressure of 30 mTorr and constant power of 50 W. A forward sweep (increasing oxygen partial pressure

  • 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
    Full Text:
    during the course of the work leading up to the writing of this thesis. Also, I would like to thank W

  • 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
    Full Text:
    / metal electrode candidate materials include Al, Mo, Ta and W. Of these, Al is most frequently used

  • 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
    Full Text:
    group members who helped incite my interest in this research project, most notably W. Ming Ang, Long

  • 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
    Full Text:
    @ 60 Hz [9]. However, the efficiency of filtered ZnS:Mn is 0.8 lm/W while it is 0.5 lm/W for SrS:Cu

  • 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
    Full Text:
    of the sun at a 42◦ angle of elevation and an intensity of 1000 W/m2, is the standard used for

  • 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

  • Inorganic thin-film solar cells

    Creator:
    Spies, Jack Alexander
    Abstract:
    The primary objective of this thesis is to explore new absorber and p-type window layer materials for thin-film solar cell applications. A new thin-film electron beam deposition system has been installed, is now operational, and has been used to deposit several types of solar cell absorber layers. Material investigations include...
    Resource Type:
    Masters Thesis
    Full Text:
    Ir ra d ia n c e W *m -2 *n m -1 1.0 0.5 0.250.38 Photon Energy (eV) AM0 AM1.5 Figure 2.1

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

    Creator:
    Shih, Shou-Po
    Resource Type:
    Masters Thesis
    Full Text:
    model was proposed by Smith [12]. ITO Electrode Insulator Capacitance Phosphor Capacitance

  • Ferroelectric thin film development

    Creator:
    Harman, Taran V.
    Abstract:
    The long-term goal of the research project initiated with this thesis is the development of lead-free, fully-transparent ferroelectric devices, such as ferroelectric capacitors or ferroelectric-gate field-effect transistors. Ferroelectric materials exhibit spontaneous polarization with the application of an external electric field, which is persistent upon removal of the applied field, and...
    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

  • High resolution electroluminescent display using active matrix approach

    Creator:
    Khormaei, Iranpour
    Resource Type:
    Dissertation

  • 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
    Full Text:
    efficiency of various luminescent impurities in sulfide phosphors. Phosphor Color ri (1m/W) @ 1 kHz ZnS:Mn

  • 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

  • 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
    Full Text:
    : Dr. John F. W e r Alternating-current thin-film electroluminescent (ACTFEL) devices are used in the

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

    Creator:
    Peery, Jeffrey B.
    Resource Type:
    Masters Thesis
    Full Text:
    and W. Ming Ang for their advice, support, and good discussions on the subject of

  • 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