Sourisseau Sebastien, Louvain Nicolas, Bi Wenhua, Mercier Nicolas, Rondeau David, Buzaré Jean-Yves, Legein Christophe
Laboratoire de Chimie, Ingénierie Moléculaire et Matériaux d'Angers, UMR-CNRS 6200, Université d'Angers, 2 Bd Lavoisier, 49045 Angers, France.
Inorg Chem. 2007 Jul 23;46(15):6148-54. doi: 10.1021/ic070240g. Epub 2007 Jun 27.
The alpha1-(Br-(CH(2))(2)-NH(3))(2)PbI(4) 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-(CH(2))(2)-NH(3))(2-x)(I-(CH(2))(2)-NH(3))(x)PbBr(x)I(4-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 (13)C 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 approximately 1 (A phase), while the complete substitution is not achieved even at elevated temperature (x(max) approximately 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.
α1-(Br-(CH₂)₂-NH₃)₂PbI₄杂化钙钛矿会发生固态转变，即有机阳离子与钙钛矿层之间发生反应，生成基于混合卤化物无机层的新型杂化钙钛矿(Br-(CH₂)₂-NH₃)₂-x(I-(CH₂)₂-NH₃)xPbBrxI₄-x。这种转变通过配备超高速探测器的传统粉末X射线衍射系统进行跟踪，并且在卤化物取代速率的估算中采用了固态¹³C NMR和ESI/MS测量。第一步反应会生成x约为1的特殊组成（A相），而即使在高温下也无法实现完全取代（xmax约为1.85（B相））。这种杂化钙钛矿的有机和无机组分之间前所未有的固态反应可被视为获得有趣杂化钙钛矿的全新策略。
