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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.
161

Gallium arsenide based MBE-grown quantum structures for near infrared wavelength applications

Govindaraju, Sridhar 25 April 2011 (has links)
Not available / text
162

Regenerative pulsations and thermal effects in an optical bistable GaAs etalon

Jewell, Jack Lee January 1981 (has links)
No description available.
163

Optical properties of chemical vapor deposited molybdenum thin films

Carver, Gary Ernest January 1980 (has links)
No description available.
164

PHOTOELECTRIC OBSERVATIONS OF THE ORION NEBULA AT SEVEN WAVELENGTHS

Reitmeyer, William Lawrence, 1923- January 1965 (has links)
No description available.
165

MEASUREMENT OF ULTRAFAST RELAXATION TIMES IN SEMICONDUCTORS USING PICOSECOND PULSES

Smirl, Arthur Lee, 1944- January 1975 (has links)
No description available.
166

Investigations in the use of the optical trap in the regulation of optical emission characteristics in polymer systems

Crawford, Kevin D. 12 1900 (has links)
No description available.
167

Structure and characterization of passivated inorganic nanocrystals and three dimensional nanocrystal arrays

Harfenist, Steven A. 12 1900 (has links)
No description available.
168

Novel methods for determining the optical constants of anisotropic polymer films -- new application of prism wave-guide coupling

Liu, Tao January 2001 (has links)
No description available.
169

Electromagnetic transmission and reflection characteristics of anisotropic multilayered structures

Weis, R. Stephen 12 1900 (has links)
No description available.
170

Polymers for electro-optic applications

Lochab, Bimlesh January 2006 (has links)
Polymer based photovoltaic cells are being intensively investigated. In such cells three key processes need to occur; namely light absorption, charge separation of the exciton, and transport of the separated charges to the electrodes. Light absorption is reliant on the optical density of the polymer. In general charge separation is achieved by blending an electron acceptor with the polymer film. However, blending materials gives rise to potentially unreliable manufacturing and lifetime issues. This thesis describes the preparation of poly(l,4-phenylenevinylene) derivatives containing dipoles in which the process of charge separation can be achieved intramolecularly. The dipole was created with the use of electron donating alkoxy groups attached to the polymer backbone, and electron withdrawing nitro group attached to the fluorenyl side chains. These groups are believed to facilitate the dissociation of the photogenerated exciton, and potentially stabilise the holes and electrons that are formed when the exciton is separated. The fluorenyl side chains were attached to the polymer backbone via biphenyl or vinyl linkages. The polymers were primarily formed using the Gilch method and the conjugated polymers were obtained either via a soluble precursor route or directly from the monomer. The photophysical properties were studied for polymers with the fluorenyl side-chains as they were found to be more easily formed and stable. For poly[2-(7-nitro-9,9-dipropylfluorenyl)-5-(2'- ethylhexyloxy)-l,4-phenylenevinylene] it was found that the photoluminescence quantum yield dropped by a factor of eight relative to the polymer without the nitro group. It was further elucidated that this was due to the exciton being separated. Solar cells containing the polymers from this study showed modest performance.

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