Organic–inorganic hybrid multifunctional materials with high-Tc reversible phase transition and wide bandgap properties

Abstract

Multifunctional materials play a crucial role in today's social development, but current intelligent multifunctional materials have the disadvantage of being unable to adjust their structure to meet diverse application needs. Therefore, organic–inorganic hybrid perovskites are expected to become a promising intelligent multifunctional material due to their inherent advantages in structural diversity. Here, the tetracadmium bromide inorganic material is combined with the N-propyl-N-methylpiperidine bromide organic cation to obtain a high-temperature reversible phase transition multifunctional material [C₅H₁₀N(CH₃)CH₂CH₂CH₃]₂CdBr₄ (1), which has the high-temperature reversible phase transition property of 333 K phase transition temperature, and crystallizes in the P space group at room temperature. In addition, through UV absorption spectroscopy and first principles calculations, the optical band gap of compound 1 is 4.65 eV, indicating that the band gap of compound 1 is determined by the determination of the organic and inorganic components. This work provides ideas for discovering new high-temperature phase transition materials or researching new organic inorganic hybrid metal halide multifunctional materials.