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Filtering by: Creator Kilcher, L. K. Remove constraint Creator: Kilcher, L. K. Contributor advisor sim Wager, John F. Remove constraint Contributor advisor sim: Wager, John F.

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  • 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

  • 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:
    source/gate or drain/gate overlap, and L is the channel length

  • Contact resistance and stability assessment of oxide-based thin film transistors

    Creator:
    Hung, Celia M.
    Abstract:
    This thesis focuses on two aspects of oxide-based thin-film transistors (TFTs), contact resistance and instability assessment. First, determination of the contact resistance of indium tin oxide (ITO) on two wide-band gap semiconductors, zinc oxide (ZnO) and indium gallium oxide (IGO), is attempted and the effects of contact resistance on device...
    Resource Type:
    Masters Thesis
    Full Text:
    thermal silicon oxide as the gate insulator; W/L = 5 with L = 200 µm. 0 V ≤ VDS ≤ 30 V in 1 V steps

  • 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:
    (AM0), at the Earth’s surface (AM1.5), and a blackbody radiation at 5800 K. . . . . . . . . . 4 2.2 (a

  • 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:
    ∆L. . . . . . . . . . . . . . . . . . . . . . 9 2.5 The parameter VA can be extracted from the TFT

  • 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:
    r L X E4 Shallow Level Forbidden Deep Transitions Level k Valence Band Figure 2.5. A

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

    Creator:
    Kumar, Manoj, 1972-
    Resource Type:
    Masters Thesis
    Full Text:
    K. Plant for his useful suggestions throughout the course of this project. Thanks to Ahmad Abu

  • 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:
    photons. 5 Wavelength (nm) 0.0 0.5 1.0 1.5 2.0 2.5 0 1000 2000 3000 4000 5000 S p e c tr a l

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

    Creator:
    Thuemler, Robert L.
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Robert L. Thuemler for the degree

  • 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
    Full Text:
    AN ABSTRACT OF THE THESIS OF Randy L. Hoffman for the degree of