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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Wide band gap semiconductors and insulators : synthesis, processing and characterization /

Hersh, Peter A. January 1900 (has links)
Thesis (Ph. D.)--Oregon State University, 2008. / Printout. Includes bibliographical references (leaves 150-157). Also available on the World Wide Web.
22

Polymer-based photovoltaic devices /

Zhao, Lin. January 2003 (has links)
Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2003. / Includes bibliographical references (leaves 79-82). Also available in electronic version. Access restricted to campus users.
23

Novel ferroelectric-semiconductor photovoltaics

Wang, Wentao, 王文韬 January 2014 (has links)
Solar cells have been traditionally developed for optimizing three key steps for charge carriers: generation, separation, and transport. Conventional solar cells are essentially PN junction based, and utilize the internal electric field near the junction interface for realizing charge carrier separation. However, this kind of structure limits material choices and device fabrication to form a working junction due to issues such as lattice mismatch, doping, and band alignment. Ferroelectric photovoltaic devices with typical capacitor structure have been developed to overcome the junction caused disadvantage but suffer from the poor charge transport issue. In this work, novel ferroelectric-semiconductor photovoltaic devices were developed and investigated in detail with experimental results and theoretical simulation. This type of solar cell is fundamentally different with traditional PN junction based solar cells, utilizing ferroelectric polarization for charge separation in semiconductor layer. Systematical works have been conducted on: (1) device working principle and mechanism study; (2) effect of electrode; (3) influence of device key dimension parameters. The new cells showed the rectifying behavior and effective photovoltaic effect after specific asymmetric polarization. Furthermore, the device performance has been improved through adjusting electrode design and semiconductor layer thickness, which is mainly due to the optimized electric field strength and distribution resulting from polarization. As low cost commercial semiconductor, the multicrystalline silicon (mc-Si) has great potential application in the novel ferroelectric-semiconductor photovoltaic devices. However, the grain boundaries with high density of defects limit the material electric properties. In order to improve the multicrystalline silicon transport property, a polar molecules system was developed to play the role in grain boundaries passivation. The small polar molecule composition and solution passivation process were carried out to optimize the passivation effect. The result showed the developed ZK series solutions reduced the Rsheet across large-angle grain boundaries by up to more than one order to be close to the bulk Rsheet. Also, the correlation between the grain misorientation and passivation effectiveness was built up. / published_or_final_version / Mechanical Engineering / Doctoral / Doctor of Philosophy
24

Morphological and materials studies on organic-based photovoltaic devices

Hindson, James Crosby January 2011 (has links)
No description available.
25

Loss mechanisms in bulk heterojunction organic photovoltaics

Gao, Feng January 2011 (has links)
No description available.
26

Device physics of bulk heterojunction polymer solar cells

Brenner, Thomas Johannes Konrad January 2012 (has links)
No description available.
27

Investigation of recombination lifetime and defects in magnetic czochralski silicon for high efficiency solar cells

Pang, Shu Koon 12 1900 (has links)
No description available.
28

A methodology to study photovoltaics and storage system interactions /

Kroposki, Benjamin David, January 1992 (has links)
Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1992. / Vita. Abstract. Includes bibliographical references (leaves 87-90). Also available via the Internet.
29

Electrochemical deposition of transparent conducting oxides for photovoltaic applications /

Attygalle, Dinesh. January 2008 (has links)
Dissertation (Ph.D.)--University of Toledo, 2008. / Typescript. "Submitted as partial fulfillment of the requirements for the Doctor of Philosophy Degree in Physics." Bibliography: leaves 97-100.
30

A combinatorial approach and multinuclear, organo-soluble Ru(II) photosensitizers /

Al-mutlaq, Fahad A. January 2005 (has links)
Thesis (Ph.D.)--York University, 2005. Graduate Programme in Chemistry. / Typescript. Includes bibliographical references (leaves 160-178). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pNR11543

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