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Polycrystalline silicon thin-film solar cells on glass by ion-assisted depositionStraub, Axel, Electrical Engineering & Telecommunications, Faculty of Engineering, UNSW January 2005 (has links)
Polycrystalline silicon (pc-Si, grain size > 1??m, no amorphous tissue) on glass is an interesting material for thin-film solar cells due to the low costs, the abundance and the non-toxic character of Si, and the properties of pc-Si like long-term stability and lateral conductance. Glass as supporting material significantly complicates the fabrication process as it limits the thermal budget and the maximum temperature. In this work, the feasibility of forming large-grained pc-Si thin-film solar cells on glass by ion-assisted deposition (IAD) on aluminium-induced crystallisation (AIC) seed layers (ALICIA solar cells) is investigated. IAD allows epitaxial growth at high rate, and being based on evaporation, is of low cost (high source material usage, no toxic gases involved). High-quality epitaxy on (100)-oriented Si wafer substrates is demonstrated in a non{UHV environment, to further increase its industrial appli- cability. High{rate growth and a sacrificial protective layer control contamination problems associated with the non-UHV environment. The process is then trans- ferred to AIC-seeded glass and optimised, with particular focus on the influence of the glass. Using high-temperature rapid thermal annealing and hydrogenation as post-deposition treatments, ALICIA solar cells with a 1-Sun open-circuit voltage of 420 mV are achieved. Moreover, two novel characterisation techniques are presented. One allows the fast and non-destructive assessment of the structural quality of pc-Si films using opti- cal measurements. Furthermore, `impedance analysis', a novel capacitance-voltage measurement technique based on impedance spectroscopy, is presented. It allows the reliable determination of the absorber layer doping density and the built{in potential of non-ideal p-n junction solar cells. The latter is used to investigate the influence of post{deposition treatments on the n-type absorber layer doping of ALICIA solar cells. It is found, using temperature dependent impedance analysis, that unintentional doping and defects have a strong influence on the absorber layer doping. A maximum in the short-circuit current density of ALICIA solar cells is found for phosphorus concentrations in the absorber of 1??1017 cm??3. For such ALI- CIA cells a base difusion length in the range 600 - 950nm, a short{circuit current density in the range 10 - 13.5 mA/cm2 and an energy conversion efficiency of 2.2% are obtained.
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Use of accurate asymptotic analyses of local transport rates in the design of alkaline scrubber-stripper systems for acid gas separation /Al Hashimi, Saleh. January 2000 (has links)
Thesis (Ph.D.)--Tufts University, 2000. / Adviser: Jerry Meldon. Submitted to the Dept. of Chemical Engineering. Includes bibliographical references (leaves 221-225). Access restricted to members of the Tufts University community. Also available via the World Wide Web;
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Characterization of boron nitride thin films on silicon (100) wafersMaranon, Walter. Nasrazadani, Seifollah, January 2007 (has links)
Thesis (M.S.)--University of North Texas, Aug., 2007. / Title from title page display. Includes bibliographical references.
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Synthesis, fractionation, and thin filmp rocessing of nanoparticles using the tunable solvent properties of carbon dioxide gas expanded liquidsAnand, Madhu, January 2007 (has links) (PDF)
Thesis (Ph.D.)--Auburn University, 2007. / List of publication generated from this dissertation research (ℓ. ix) Abstract. Vita. Includes bibliographic references (ℓ. 231-259)
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Characterization of polymeric thin film by using positron annihilation spectroscopyZhang, Junjie, Jean, Y. C. January 2005 (has links)
Thesis (Ph. D.)--Dept. of Chemistry and School of Computing and Engineering. University of Missouri--Kansas City, 2005. / "A dissertation in chemistry and computer networking." Advisor: Yan-Ching Jean. Typescript. Vita. Description based on contents viewed Nov. 12, 2007; title from "catalog record" of the print edition. Includes bibliographical references (leaves 162-174). Online version of the print edition.
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Thermally induced transitions in polymer thin filmsArceo, Abraham, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.
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A micro fabricated Gas-FE sensor using SMO films /Zhong, Guixiong, January 2007 (has links) (PDF)
Thesis (M.S.) in Physics--University of Maine, 2007. / Includes vita. Includes bibliographical references (leaves 113-125).
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Synthesis and characterization of Zr1-xSixN thin film materials /Zhang, Xuefei. January 2007 (has links) (PDF)
Thesis (M.S.) in Physics--University of Maine, 2007. / Includes vita. Includes bibliographical references (leaves 82-87).
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Magnetism and structure of thin 3d transition metal films : XMCD and EXAFS using polarized soft x-rays /Hahlin, Anders, January 2003 (has links)
Diss. (sammanfattning) Uppsala : Univ., 2003. / Härtill 11 uppsatser.
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Optical properties of thin films and opaque solids /Islam, Anoara. January 1979 (has links) (PDF)
Thesis (Ph.D.) -- University of Adelaide, Dept. of Physics, 1980.
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