| Description |
The focus of this dissertation is to study the multilayer graphene and carbon nanoribbon-based photodetectors through the fabrication of features like films, islands, mesas, as well as nanoribbons. The corresponding photoresponse was next explored with the realization of photodetecting devices. Graphene-based photodetectors have been fabricated and studied for a long time, and the mechanism of the photoinduced carriers in such photodetectors is still not clear. In addition, the photoresponsivity of graphene photodetectors is still improvable. Based on the research of the photoresponse experiment of multilayer graphene and carbon nanoribbon-based photodetectors, the mechanism for the photodetecting is further discussed and the photoresponsivity is highly improved by different methodologies. Specifically, this dissertation includes the following five chapters of topics: (1) introductions; (2) graphite / multilayer graphene photodetectors; (3) tunable photoresponse of epitaxial graphene on SiC; (4) photoresponse in carbon nanoribbon-based devices; and (5) conclusions. Overall, my dissertation achieves the goal of fundamental discussion of photodetecting in multilayer graphene and carbon nanoribbon-based devices and realizes the improved and tunable photoresponse in the meantime. I hope that this dissertation will help move forward graphene/carbon materialbased research, which is not only limited to the device fabrication and nanopatterning technology but also to achieve a better output of photodetectors. |
