Sökning: "molecular semiconductors"
Visar resultat 1 - 5 av 78 avhandlingar innehållade orden molecular semiconductors.
1. Molecular Electronics : A Theoretical Study of Electronic Structure of Bulk and Interfaces
Sammanfattning : This thesis deals with theoretical studies of the electronic structure of molecules used in the context of molecular electronics. Both studies with model Hamiltonians and first principle calculations have been performed. LÄS MER
2. Visualising Functional Nanostructures of Organic Semiconductors using Electron Microscopy
Sammanfattning : Organic semiconducting materials have enabled the solution-processable fabrication of light-weight and flexible electronic devices. In particular, doping using molecular dopants has enabled the fabrication of high-performance organic electronics. LÄS MER
3. Characterization of Surfaces Relevant to Nanotechnology
Sammanfattning : In this thesis investigations of the structure and dynamics of semiconductor surfaces relevant for the synthesis of nanostructures are presented. The studies were performed using Scanning Tunneling Microscopy (STM), Low Energy Electron Diffraction (LEED), and Spectroscopic PhotoEmission and Low Energy Electron Microcopy (SPELEEM). LÄS MER
4. Correlating Nanostructure and Electronic Properties of Organic Semiconductors by Electron Microscopy
Sammanfattning : Organic semiconductors enable fabrication and efficient processing of electronic devices with light weight, mechanical flexibility and tuneable properties. Despite significant progress in the last decades, efficiencies and long-term stabilities of these systems still need to be improved. LÄS MER
5. Localization effects in ternary nitride semiconductors
Sammanfattning : InGaN based blue and near-ultraviolet light emitting diodes and laser diodes have been successfully commercialized for many applications such as general lighting, display backlighting and high density optical storage devices. Despite having a comparably high defect density, these devices are known for their efficient operation, which is attributed to localization in potential fluctuations preventing carriers from reaching the centers of nonradiative recombination. LÄS MER