Soft-semiconductors such as halide-perovskites can be synthesized by simple wet chemistry methods, allowing a cheap and scalable fabrication of efficient devices based on these compounds. We aim to gain improved understanding and synthetic control over their composition, structure, size and dimensionality in order to study the structure-functionality in these compounds. Such control will allow a rational design of materials for various applications. We utilize various synthesis and crystal growth techniques, to obtain various samples from large single-crystals to poly-crystalline powder and colloidal nano-crystals, depending on the exact study. Upon synthesis we use structural characterization based on X-ray diffraction to resolve the crystal structure and optical spectroscopy (absorption and photoluminescence) to classify these materials for specific applications.