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Filtering by: Creator Smith, Susan M. Remove constraint Creator: Smith, Susan M. License All rights reserved Remove constraint License: All rights reserved Subject Thin films Remove constraint Subject: Thin films

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  • Atomic layer deposition of nanolaminate Al₂O₃-Ta₂O₅ and ZnO-SnO₂ films

    Creator:
    Smith, Sean Weston
    Abstract:
    Thin films are an enabling technology for a wide range of applications, from microprocessors to diffusion barriers. Nanolaminate thin films combine two (or more) materials in a layered structure to achieve performance that neither film could provide on its own. Atomic layer deposition (ALD) is a chemical vapor deposition technique...
    Resource Type:
    Masters Thesis
    Full Text:
    Weston Smith for the degree of Master of Science in Materials Science presented on March 8, 2011

  • Copper and iron chalcogenides for efficient solar absorption

    Creator:
    Platt, Heather A. S.
    Abstract:
    This dissertation outlines two approaches for improving the efficiency and reducing the cost of photovoltaic energy generation. First, the structures of known binary copper and iron compounds are used to choose the promising compositions Fe₂XS₄ (X = Si, Ge), Cu₃TaQ₄ (Q = Se, Te), and BaCuQ'F (Q' = S, Se,...
    Resource Type:
    Dissertation
    Full Text:
    to thank Andrew Smith and Sean Muir of the Subramanian group for their help with the occasional odd

  • 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:
    given temperatures, with each bilayer deposited from precursors of (A) 0.2 M TiO2, 0.12 M AlPO

  • 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:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165 6.2 Tetrahedrites - Cu10M2Sb4Ch13 (M = Cu, Mn, Zn, Al, In; Ch = S, Se) . . . . 170 6.2.1

  • Functional materials for advanced energy and electronic devices

    Creator:
    Flynn, Brendan T.
    Abstract:
    Advances in energy technologies and electronics have typically occurred through either heightened performance or cost reduction. This dissertation explores both routes through a series of fundamental material studies that may contribute to the enabling of next generation devices. Solution based syntheses and deposition of chemical products offer a low cost...
    Resource Type:
    Dissertation
    Full Text:
    . James, and M. Woodhouse, “A wafer-based monocrystalline silicon photovoltaics road map: Utilizing

  • Fabrication of a flexible glucose sensing catheter for human implantation

    Creator:
    Matthews, David J.
    Abstract:
    Flexible electronics processing techniques were applied to integrate a glucose sensor with a hormone-delivery catheter in order to create a cheap and minimally invasive method for patients with type 1 diabetes to continually monitor and control their blood sugar levels. Ultimately, this work intends to move toward the development of...
    Resource Type:
    Masters Thesis
    Full Text:
    number 1-R43-DK-096678-01), The Leona M. and Harry B. Helmsley Charitable Trust (grant number

  • CdS nanocrystalline thin films deposited by the continuous microreactor-assisted solution deposition (MASD) process : growth mechanisms and film characterizations

    Creator:
    Su, Yu-Wei
    Abstract:
    The continuous microreactor-assisted solution deposition (MASD) process was used for the deposition of CdS thin films on fluorine-doped tin oxide (FTO) glass. The MASD system, including a T-junction micromixer and a microchannel heat exchanger is capable of isolating the homogeneous particle precipitation from the heterogeneous surface reaction. The results show...
    Resource Type:
    Dissertation
    Full Text:
    (Mw = 53.49 g/mole), and 4.16 ml of 14.82 M (28 wt%) NH4OH in DI water. The total volumn was added

  • 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:
    Indirect Direct AM 1.5 Ir ra d ia n ce ( W /m 2 n m ) 0 1 2 Wavelength (nm) 500 1000 2000

  • Selective self-assembly of biogenic silica assisted by layer-by-layer deposition and inkjet printing

    Creator:
    Wang, Wei
    Abstract:
    Nature is an inspirational source of silica structures that possess unique optical properties. A few classes of organisms fabricate metal oxides with nanoscale features by a bottom-up self assembly process. In particular, diatoms are a prolific class of single-celled algae that possess silica shells or “frustules” with intricate submicron scale...
    Resource Type:
    Masters Thesis
    Full Text:
    , polyelectrolyte/polyelectrolyte ion pairs are replaced by polyelectrolyte/salt ion pairs. + - + - + + - + m aq

  • 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:
    3750 4000 Sp ec tra l I rra di an ce (W m -2 nm - 1) Wavelength (nm) AM0 spectrum AM1.5