The conversion efficiency of conventional silicon (Si) photovoltaic cells has not been improved significantly during last two decades but their cost decreased dramatically during this time. However, the higher price-per-watt of solar cells is stil...
The exploration of a group of new 2D materials, such as graphene and transition metal dichalcogenides, has become the hottest research of interest in recent years. With the dependable techniques of producing 2D materials, particularly mechanical e...
Graphene is a single atomic layer two-dimensional (2D) hexagonal crystal of carbon atoms with sp2-bonding. Because of its various special or unique properties, graphene has attracted huge attention and considerable interest in recent years. This P...
This dissertation explores three related embodiments of light–matter interactions at the micro– and nano–scales, and is focused towards tangible device applications. The first topic provides a fundamentally different transistor or electronic switc...
Raman and photoluminescence (PL) spectroscopy are two of the major spectroscopic techniques that are currently used in studies on solid state materials. Raman spectroscopy, which is based on Raman scattering process, is widely used in characterizi...
Photoluminescence mapping and time resolved photoluminescence imaging have previously been used to study charge carrier dynamics in bulk semiconductors. Recently, our research group has used spatially resolved PL mapping to examine and model carri...
Containing only earth abundant and environmental friendly elements, quaternary compounds Cu2ZnSnS4 (CZTS) and Cu2ZnSnSe4 (CZTSe) are considered as promising absorber materials for thin film solar cells. The best record efficiency for this type of ...