Structural Rigidity Enables Amplified Spontaneous Emission in 2D Alkylammonium Tin Perovskites.
Two-dimensional tin perovskites are attracting increasing attention for coherent light emission, yet the impact of organic cations on their properties remains poorly understood. Here, we compare the Ruddlesden-Popper (RP) butylammonium tin iodide (BA2SnI4) and Dion-Jacobson (DJ) 1,4-diammoniobutane tin iodide (DABSnI4)...