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Abstract: Halide perovskites have recently emerged as the state-of-the-art semiconductors with the unique combination of outstanding optoelectronic properties and facile solution synthesis. Within only a decade of research, their polycrystalline thin films have already achieved a remarkable success in photovoltaics, competing now with the high-quality inorganic semiconductors. Yet, grain boundaries in these polycrystalline thin films have been found to act as non-radiative recombination centers and facilitate the material’s degradation, adversely affecting the device performance. On the other hand, single crystals of halide perovskites – which are free of grain boundaries – exhibit even superior charge transport characteristics and environmental stability over their polycrystalline alternatives.
In this regard, my dissertation focuses on the design, growth and characterization of halide perovskite single crystals. Particularly, we investigate their fundamental optical and charge transport properties, as well as develop crystal engineering approaches toward their applications in optoelectronics.