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 11 of 11 for “"p-type semiconductor"”.
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THE MODIFICATION OF ELECTROCHEMICAL AND PHOTOELECTROCHEMICAL PROPERTIES IN THIN FILMS OF TRI- AND TETRAVALENT METAL PHTHALOCYANINES
… four systems behaved in a manner similar to a p-type semiconductor when prepared at rapid rates (10-20 A/min) on gold substrates. In the dark, for contacting redox couples with Eᵒ’ values negative of +0.6V, the phthalocyanine electrodes showed negligible dark currents. Upon illumination, the …
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Thermogravimetric, thermopower, and electrical conductivity studies of the Ba₂YCu₃O₇₋ₓ system
… techniques. The system was found to exhibit a semiconductor to metallic transition coincident with the documented orthorhombic to tetragonal phase transition. Conduction is accomplished in the semiconducting phase by an activated small hopping polaron mechanism. The oxide was observed to be a …
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Fabrication and optimization of N-Cu2O thin film using electrodeposition method for homojunction solar cell
Cuprous oxide (Cu2O) is a promising semiconductor that has been getting attention as the alternative material for solar cell application. It is abundant, low cost and non-toxic to the environment. A homojunction Cu2O is said to provide high conversion efficiency for solar cell. However, as Cu2O is …
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Enhanced Structure and Crystallinity of Semiconducting Polymer Films Through Electrospray Deposition
… extensively studied. Applications of P3HT as a p-type semiconductor have been demonstrated in devices like organic solar cells, light emitting diodes and transistors. Improvements in the performance of the mentioned devices have been correlated with a higher degree of crystallinity as well as the …
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Solar Driven Hydrogen Generation with Dye-Sensitised CuCrO2 Photocathodes
… limited by the small range of wide-bandgap p-type semiconductors available. The majority of previous reports have employed NiO, which displays low performance with immobilised dyes and catalysts, requiring exploration of other metal oxides. In this thesis, CuCrO2 is presented as an alternative …
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Surface chemistry research of electronic processes and electronic devices
… the band bending on organic molecule modified semiconductor surfaces. The interaction between the phthalocyanine dye molecule and different metal oxide powders was measured by the SPV analysis. The F64PcZn molecule is likely acting as a p-type semiconductor, and, due to the new charge …
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Nanostructures for Coherent Light Sources and Photodetectors
… with the silicon complementary metal-oxide-semiconductor (CMOS) technology. Persistent efforts continue to achieve efficient light emission as well as broadband photodetection from silicon in extending the silicon technology into fully integrated optoelectronic circuits. Recent …
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The growth and characterisation of zinc telluride for use as a nuclear radiation detector
As grown ZnTe is a highly conductive p-type semiconductor. In an attempt to produce highly resistive material suitable for fabrication into nuclear radiation detectors various dopants have been added during the Bridgman growth process to try to compenate the shallow acceptor defects that are …
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Synthesis, Fabrication and Surface Modification of Nanocrystalline Nickel Oxide for Electronic Gas Sensors
… Nickel oxide (NiO) is a wide band gap and p-type semiconductor with stable chemical and physical properties. NiO has been recognized as one of the most promising material for optical, electrical and gas sensor application owing to its electronic and catalytic properties. NiO is synthesized …
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ZnSe Quantum Dots as a platform for solar fuels synthesis
… photocatalytic activity is not limited to one type of molecular catalyst and that ZnSe QDs are a particularly versatile light-absorber platform to drive a range of molecular co-catalysts based on different catalyst classes and anchoring strategies. Subsequently, the QDs were used for CO2 …
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Optical studies of highly-doped GaAs:C
… of intervalenceband transitions, for this p-type semiconductor, is shown (in this dissertation) to be a serious drawback of this simple model. In order to obtain the optical properties of GaAs:C in a model-independent way, and to attempt to resolve the apparent dc/infrared mobility dichotomy, …