Public defence in Micro- and nanosciences, M.Sc. Abde Shafi

The title of the thesis: Photonic and Electronic Characterization of Two-dimensional Transition Metal Dichalcogenides

Doctoral student: Abde Shafi
Opponents: Prof. Polina Kuzhir, University of Eastern Finland
Custos: Prof. Harri Lipsanen, Aalto University School of Electrical Engineering, Department of Electronics and Nanoengineering

The thesis includes the study of the fundamental properties of two-dimensional transition metal dichalcogenides (2D-TMDCs) and their potential applications in nanophotonics, optoelectronics, and nanoelectronics. The primary purpose of the study is to address challenges associated with these materials, such as limited light-matter interactions, low luminescent yield, reduced carrier mobility, and susceptibility to environmental changes. The research employs advanced techniques to enhance the optical and electronic properties of 2D-TMDCs, focusing on mixed-dimensional heterostructures and tuning electronic properties for high-performance devices. The results include significant enhancements in Raman and photoluminescence responses in heterostructures, improved electronic properties through substrate engineering, and the transformation of semiconductor phases for enhanced optoelectronic performance. The findings have broad implications and can be applied in developing high-performance photonic and optoelectronic devices, such as phototransistors and electro-optic modulators. In conclusion, the study provides valuable insights and practical solutions for advancing the application of 2D-TMDCs in various technological domains and contributing significantly to the field of nanotechnology.

Keywords: Two-dimensional materials, transition metal dichalcogenides, mixed-dimensional heterostructures, photoluminescence, harmonic generations, field effect transistors.

Thesis available for public display 10 days prior to the defence at: https://aaltodoc.aalto.fi/doc_public/eonly/riiputus/

Contact:

Doctoral theses in the School of Electrical Engineering: https://aaltodoc.aalto.fi/handle/123456789/53
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