Bandgap engineered ferroelectric solar cells and their applications

Our group has been focused on the deposition and characterization of perovskite oxide thin films and artificial structures, particularly those showing interesting magnetic, ferroelectric, and multiferroic properties. Particular interests include: ferroelectric and multiferroic thin films , stain effects in epitaxial heterostructures, and interface coupling in perovskite superlattices.

Novel electronic devices based on complex oxides and hybrid materials

By using the two-step solid reaction method, complex oxides targets were prepared. By using sputtering method, the epitaxial growth was made in many interesting oxides. We investigated the effect of the thickness of the target on the deposition rate. According to our observation, the epitaxial growth direction of the films is determined the same as substrate.

Study on improving the performance of halide perovskite solar cells (PSCs)

Many researchers have recently become interested inorganic-organic halide perovskites solar cells (PSCs) owing to their high PCE; abundant elemental constituents; and low-cost, low-temperature, and scalable fabricating process. In particular, the study on improving the performance of the device has become essential. Therefore, our strategies include dope common TiO2 with appropriate metals to reduce the bandgap; this enhances sunlight absorbance as well as the transportation of electrons in electron transport material from the perovskite layer. Besides, inserting an interface-effective NiO@C layer between the perovskite layer and hole transport layer to delay the recombination of the electron-hole pairs in the active layer and decrease charge transport resistance. As result, the performance of PSCs was enhanced.

Lead Halide Perovskite based Deep Ultraviolet (UV) Detector

Over the past few years, ultraviolet (UV) detectors have received tremendous attention from scientific researchers owing to their promising applications, such as secret communication, image sensing, environmental monitoring, astronomy, and medicine. In particular, the detection of partial discharge which the weak discharge signals from high-voltage electrical equipment or insulation systems can be monitored and predicted in the early stages thanks to UVC sensors. In this trend, we prepared a self-powered halide perovskite-based photodetector for UVC detection. The device demonstrated high performance and long-term stability with a low-temperature fabrication and ease of preparation.

Bio-ceramics: Nanostructures for bone regeneration

HA (Hydroxyapatite) has been researched as bioactive materials for biomedical applications due to their unique properties such as orthopedic and dental because of their good biocompatibility, high tensile strength, fracture toughness, and fatigue strength. Titanium dioxide (TiO2) nanoparticles were used by coating onto HA particles to enhance the bioactive properties of HA. We are investigated surfactant SDBS to develop the dispersion and surface energy of HA/TiO2 coatings for bone regeneration and dental implant applications.