Phys.org August 31, 2023
Although two-dimensional organic semiconductor-incorporated perovskites are a promising family of hybrid materials for optoelectronic applications, tuning their structures and specific properties has remained challenging. By choosing the right solvent a team of researchers in the US (Purdue University, Duke University, Lawrence Berkeley National Laboratory) has developed a general method to tune the dimensionality of phase-pure organic semiconductor-incorporated perovskite single crystals during their synthesis. They showed that the length of the conjugated semiconducting organic cations and the dimensionality of the inorganic layers could be manipulated at the same time. The energy band offsets and exciton dynamics at the organic–inorganic interfaces could be precisely controlled. They showed that longer and more planar Ï€-conjugated organic cations induced a more rigid inorganic crystal lattice, which led to suppressed exciton–phonon interactions and better optoelectronic properties as compared to conventional two-dimensional perovskites… read more. TECHNICAL ARTICLE
…mechanically exfoliated 2D OSiP single crystals. Credit: Nature Chemistry, August 31, 2023