Global ETD Search

41	Efficient, Stable Infrared Photovoltaics based on Solution-Cast PbSe Colloidal Quantum Dots Koleilat, Ghada 24 February 2009 (has links) Half of the sun’s power lies in the infrared. As a result, the optimal bandgaps for solar cells in both the single-junction and even the tandem architectures lie beyond 850 nm. However, progress in low-cost, large-area, physically-flexible solar cells has instead been made in organic and polymer materials possessing absorption onsets in the visible. Recent advances have been achieved in solution-cast infrared photovoltaics through the use of colloidal quantum dots. Here we report stable solution-processed photovoltaic devices having 3.6% power conversion efficiency in the infrared. The use of a strongly-bound bidentate linker, benzenedithiol, ensures device stability over weeks. We investigate in detail the physical mechanisms underlying the operation of this class of device. We find that diffusion of electrons and holes over hundreds of nanometers through our PbSe colloidal quantum dot solid is chiefly responsible for the high external quantum efficiencies obtained in this new class of devices. Nanocrystals Infrared Photovoltaics 0794
42	Magnetic studies of colossal magnetoresistance materials and FePt nanocrystals Hyun, Changbae, January 1900 (has links) Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references. Scanning probe microscopy. Nanocrystals.
43	Bio-modified nanocrystals with mega-releaseable fluorophores for ultra-sensitive biomolecules detection / Sin, King Keung. January 2008 (has links) Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2008. / Includes bibliographical references (leaves 137-152). Also available in electronic version.
44	Semiconductor nanostructures synthesis, properties and device applications : a dissertation / Wu, Zhen, January 1900 (has links) Thesis (Ph. D.)--Northeastern University, 2008. / Title from title page (viewed March 3, 2009). Graduate School of Arts and Sciences, Dept. of Physics. Includes bibliographical references (p. 218-227).
45	The optical properties of silicon nanocrystals and the role of hydrogen passivation / Wilkinson, Andrew Richard. January 2006 (has links) Thesis (Ph.D.)--Australian National University, 2006.
46	Nanocrystal stabilization, synthesis and assembly using supercritical fluids Shah, Parag Suresh, January 2003 (has links) (PDF) Thesis (Ph. D.)--University of Texas at Austin, 2003. / Vita. Includes bibliographical references. Available also from UMI Company. Nanocrystals Supercritical fluids.
47	Synthesis and characterisation of metal chalcogenide nanocrystals : a thesis submitted to the Victoria University of Wellington in fulfilment of the requirements for the degree of Doctor of Philosophy in Chemistry / Beal, John Harley Loveless. January 2009 (has links) Thesis (Ph.D.)--Victoria University of Wellington, 2009. / Includes bibliographical references.
48	Synthesis and characterization of group IV semiconductor nanocrystals and nanowires Lu, Xianmao, January 1900 (has links) (PDF) Thesis (Ph. D.)--University of Texas at Austin, 2005. / Vita. Includes bibliographical references.
49	A study on the nanocrystal floating-gate nonvolatile memory Lee, Jong Jin, Kwong, Dim-Lee, January 2005 (has links) (PDF) Thesis (Ph. D.)--University of Texas at Austin, 2005. / Supervisor: Dim-Lee Kwong. Vita. Includes bibliographical references.
50	Biological approaches to synthesis and assembly of semiconductor and metallic nanomaterials Sweeney, Rozamond Yvonne, Iverson, Brent L. January 2005 (has links) (PDF) Thesis (Ph. D.)--University of Texas at Austin, 2005. / Supervisor: Brent Iverson. Vita. Includes bibliographical references.

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