Hybrid perovskite resulting from the solid-state reaction between the organic cations and perovskite layers of α1-(Br-(CH2) 2-NH3)2Pbl4

Abstract

The α1-(Br-(CH2)2-NH3) 2Pbl4 hybrid perovskite undergoes a solid-state transformation, that is, the reaction between the organic cations and the perovskite layers to give the new hybrid perovskite (Br-(CH2) 2-NH3)2-x(I-(CH2) 2-NH3)x-PbBrxI4-x, based on mixed halide inorganic layers. This transformation has been followed by a conventional powder X-ray diffraction system equipped with a super speed detector, and both solid-state 13C NMR and ESI/MS measurements have been adopted in the estimation of the rate of halide substitution. The first reaction step leads to the special composition of x ≈ 1 (A phase), while the complete substitution is not achieved even at elevated temperature (x max ≈ 1.85 (B phase)). This unprecedented solid-state reaction between organic and inorganic components of a hybrid perovskite can be considered as a completely new strategy to achieve interesting hybrid perovskites. © 2007 American Chemical Society.