Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Surface photovoltage"”.
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Light and Charge Management in Optoelectronic Systems
… conductors. We introduce a new interpretation of surface photovoltage measurements for these materials and demonstrate control over transport of charge throughout the material. Thereafter, we explore the physical implications of concentrating light. We present a theoretical study detailing it may …
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Application of scanning micro-tip and UHV Kelvin probes in surface and material characterisation.
… utilising the scanning Kelvin probe (SKP) for surface potential mapping and monitoring changes in work function due to environmental influences in ambient and UHV conditions. The SKP is a truly non-contact technique which determines local work function changes and surface states on conductors, …
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Photon-assisted spectroscopy of electronic interface states in perovskite oxide heterostructures
… different photoassisted spectroscopy techniques: surface photovoltage spectroscopy and photoelectron spectroscopy. This work especially deals with perovskite oxides, namely with the model perovskite strontium titanate (SrTiO3) as a substrate and three differently doped lanthanum manganite thin …
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Process Dependence of Defects and Dopants in Wide Band Gap Semiconductor and Oxides
… DRCLS, secondary ion mass spectrometry (SIMS), surface photovoltage spectroscopy (SPS), transient surface photovoltage spectroscopy (TSPS), photoluminescence spectroscopy (PLS) and temperature-dependent Hall-effect (TDHE) measurements to investigate the strong process dependence of Li …
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STUDY AND CHARACTERIZATION OF INNOVATIVE CLEANING METHODS IN MICROELECTRONICS
… cleaning steps with the greatest impact on Si surface chemical-physical characteristics, such as the drying step with IPA vapors. Different wafer typologies have been used, in order to evaluate the influence that previous manufacturing process flow can have on Si/gate oxide interface. Different …
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Designing Planar Silicon Solar Cells for Singlet Fission Sensitization
… oxide passivation layer growth conditions and surface treatments, Si(100) versus Si(111) orientation, and junctions formed by diffusion doping versus ion implantation. Complementary surface photovoltage (SPV) measurements on matching optical stacks show evidence of an illumination-induced …
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The application of the Kelvin probe in materials science.
… on the study of metal and semiconductor surfaces in both ambient and UHV environments. The concept of the work function φ and its importance as a parameter in materials science is discussed in the context of novel technological applications. The various methods to determine the work …
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Surface chemistry research of electronic processes and electronic devices
Surface chemistry and analysis is important in many different disciplines. In this dissertation, the role of surface chemistry in improving performances of electronic devices are discussed. Two different perspectives are investigated. In the first topic, atomic layer etching (ALE) of transition …
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THE ROLE OF NATIVE POINT DEFECTS AND SURFACE CHEMICAL REACTIONS IN THE FORMATION OF SCHOTTKY BARRIERS AND HIGH N-TYPE DOPING IN ZINC OXIDE
… work explores the electronic properties of ZnO surfaces and interfaces and the impact of native point defects on Schottky barrier formation and doping.</p><p>The results presented here use a complement of depth-resolved cathodoluminescence spectroscopy (DRCLS), atomic force microscopy (AFM), …
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Developing Ternary Bismuth Chalcogenide Nanocrystals for Photovoltaics and Photodetectors
… iodide ligands had enhanced sum mobility and surface photovoltage (SPV) signals, which implies an improvement in the macroscopic charge-carrier transport. However, the ultrafast localisation process was still observed in these iodide-treated NaBiS<sub>2</sub> NCs, suggesting that their cation …