<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "Synthesis, Purification, Doping of and Charge Transport in Low-Dimensional Carbon-Based Semiconductors"^^ . "Confining the electron wave functions of the semi-metal graphene by reducing its dimensionality\r\nleads to the opening of a bandgap. The resulting one-dimensional semiconductors like singlewalled carbon nanotubes (SWCNTs) or graphene nanoribbons (GNRs) are promising materials\r\nfor optoelectronic applications, due to their outstanding carrier mobilities and structuredependent tunable optical and electronic properties.\r\nThe fundamental properties of SWCNTs, such as exciton dynamics, charge transport and their\r\ninteraction with their environment have been studied thoroughly over the past decades and\r\nSWCNTs have been successfully integrated into a variety of optoelectronic devices. However,\r\npractical bottlenecks, associated with dispersion, purification and processing prevent scalable\r\ndevice integration. This thesis provides optimized and detailed protocols to obtain high-purity\r\ndispersions of long, defect-free semiconducting (6,5), (7,5) and large diameter semiconducting\r\nSWCNTs via polymer-wrapping in organic solvents using shear force mixing as an exfoliation\r\nmethod. Furthermore, a new highly soluble Lewis acid-based dopant is introduced for efficient\r\nand stable p-type doping of small-diameter, polymer-wrapped SWCNTs. In contrast to\r\nSWCNTs, many of the fundamental properties of atomically-precise GNRs are still under active\r\ninvestigation, as they have been first synthesized almost a decade later than SWCNTs. This work\r\ndemonstrates that structural defects, which are commonly introduced during bottom-up synthesis\r\nof GNRs, significantly alter absorption and emission features in dispersions of GNRs, as well as\r\nthe charge transport in GNR-based field-effect transistors. A simple method to heal defects in\r\nGNR films and thus improve their charge transport properties is presented. This work also\r\nprovides first evidence of polaron formation in GNRs upon introduction of excess charge carriers\r\nvia chemical and electrochemical doping. The findings highlight similarities between\r\nsemiconducting polymers and GNRs, both in optical response to doping and charge transport in\r\ndevices. Within this thesis, these findings are contextualized within the broader research\r\nlandscape and implications for future studies are discussed."^^ . "2025" . . . . . . . "Sebastian Steffen"^^ . "Lindenthal"^^ . "Sebastian Steffen Lindenthal"^^ . . . . . . "Synthesis, Purification, Doping of and Charge Transport in Low-Dimensional Carbon-Based Semiconductors (PDF)"^^ . . . "Sebastian Lindenthal_Dissertation.pdf"^^ . . . "Synthesis, Purification, Doping of and Charge Transport in Low-Dimensional Carbon-Based Semiconductors (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "Synthesis, Purification, Doping of and Charge Transport in Low-Dimensional Carbon-Based Semiconductors (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "Synthesis, Purification, Doping of and Charge Transport in Low-Dimensional Carbon-Based Semiconductors (Other)"^^ . . . . . . "preview.jpg"^^ . . . "Synthesis, Purification, Doping of and Charge Transport in Low-Dimensional Carbon-Based Semiconductors (Other)"^^ . . . . . . "medium.jpg"^^ . . . "Synthesis, Purification, Doping of and Charge Transport in Low-Dimensional Carbon-Based Semiconductors (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #37024 \n\nSynthesis, Purification, Doping of and Charge Transport in Low-Dimensional Carbon-Based Semiconductors\n\n" . "text/html" . . . "500 Naturwissenschaften und Mathematik"@de . "500 Natural sciences and mathematics"@en . . . "530 Physik"@de . "530 Physics"@en . . . "540 Chemie"@de . "540 Chemistry and allied sciences"@en . .