Fig. 2: Structural distortions influenced by A-site cations in 2D perovskites.
From: Atomically confined excitons in 2D perovskites for bright and sub-nanosecond scintillation
a Schematic of in-plane tilting (Din), out-of-plane tilting (Dout) and intra-octahedral distortion (θ2). b The influence of A-site cations on intra-octahedral distortion. c The influence of A-site cations on out-of-plane tilting. d The influence of A-site cations on in-plane tilting. Red balls represent Pb atoms, blue balls represent Br atoms, hollow ball represents the electropositive region of organic cations, and purple ball represents the electronegative region.
