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Citations since 2017
1 Research Item
This paper, emphasis different growth techniques of two-dimensional hole gas of strained germanium (sGe) heterostructure, molecular beam epitaxy (MBE) and chemical vapor deposition (CVD). sGe heterostructure has become an important material as a replacement material to Silicon in P-type devices because of its higher hole mobility and lower effectiv...
We report the photovoltaic response of solid-state devices based on porous TiO2 photosensitized with PbS nanocrystals. A photovoltaic response in the visible and near infrared wavelength range is obtained by exploiting the Schottky junction that forms at the interface between the PbS/TiO2 film and a metallic contact. Spatial images of the photolumi...
We use magnetic fields up to 30 T to study the circularly polarized magneto-photoluminescence (PL) of colloidal PbS nanocrystals. A semiclassical model for the population of polarized excitons is used to account for the measured magnetic field and temperature dependence of the degree of circular polarization of the PL emission and to probe the g fa...
We show that the thermal annealing of thiol-capped PbS colloidal quantum dots provides a means of narrowing the nanoparticle size distribution, increasing the size of the quantum dots and facilitating their coalescence preferentially along the 100 crystallographic axes. We exploit these phenomena to tune the photoluminescence emission of an ensembl...