Search for dissertations about: "Multiple Exciton Generation"

Found 5 swedish dissertations containing the words Multiple Exciton Generation.

2. 1. Probing Electron Collisions in Nanostructures

   Author : Fikeraddis Damtie; Matematisk fysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; electron-electron interaction; Time dependent dynamics; Multiple Exciton Generation; Two dimensional spectroscopy; Fysicumarkivet A:2017:Damtie;

   Abstract : This thesis studies the role of interaction between charged particles for transport and optical properties in nanostructures. Simulations are provided for a quantitative description of the system dynamics probed by either current spectroscopy or light absorption. READ MORE

4. 2. Ultrafast Photoinduced Processes in Core and Core–Shell Quantum Dots for Solar Cell Applications “Tiny Crystals for Big Applications”

   Author : Mohamed Qenawy; Kemisk fysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Quantum dots; core–shell; electron injection; hole injection; hole trapping; exciton migration; solar cells; ultrafast dynamics; time-resolved spectroscopy.;

   Abstract : The balance between our demands of energy and the energy we are consuming is not in equilibrium anymore. Therefore, the search for other energy resources is indispensable. Sustainable energy sources offer the alternative to the fossil fuels. READ MORE

5. 3. Electrical and Optical Properties of AlGaAs/GaAs Aperiodic Superlattices and Resonant Tunneling Diodes. Theory, Design and Applications

   Author : Simon Mang Cao; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; exciton-assisted transport; miniband; high-speed quantum electronics; optical properties; ultrafast optoelectronics; field-induced transport; irregular superlattices; nanometer-scale heterostructures; laser diodes; resonant tunneling;

   Abstract : The objective of the work presented in this thesis is to study quantum transport and optical properties of aperiodic superlattices and resonant tunneling diodes using III-V semiconductor heterostructures grown by molecular beam epitaxy. The study follows a procedure of theoretical modeling, computer-aided design and simulation, sample growth, and measurements. READ MORE

6. 4. Optical Modeling and Characterization of Layers and Multilayer Structures : Organic Optoelectronic Devices and Spectroscopic Ellipsometry

   Author : Leif A. A. Pettersson; Robert W. Collins; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES;

   Abstract : This dissertation is on the subject of modeling and characterization of layers and multilayer structures with respect to their optical properties and characteristics. A number of different systems have been investigated; among them multilayer structures in the form of organic optoelectronic devices, anisotropic layers of conjugated polymers as well as inhomogeneous layers of porous silicon and oxidized silver. READ MORE

7. 5. Engineering Multicomponent Nanostructures for MOSFET, Photonic Detector and Hybrid Solar Cell Applications

   Author : Asghar Jamshidi Zavaraki; Hans Ågren; Kevin J. Webb; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Epitaxial G rowth; Reduced Pressure Chemical Vapor Deposition; GeSnSiC; MOSFET; Photonic Detector; Resistivity; Phosp hor and Boron doping; Colloidal QDs Sensitized Solar Cell; Cd - free and Cd - based QDs; High Resolution Reciprocal Lattice Map; High Resolution X - Ray Diffraction; High Resolution Transmission Electron Microscopy; High resolution Scanning E lectron Microscopy .;

   Abstract : Silicon technologyhas been seekingfor a monolithic solution for a chip where data processing and data communication is performed in the CMOS part and the photonic component, respectively. Traditionally, silicon has been widely considered for electronic applications but not for photonic applications due to its indirect bandgap nature. READ MORE