Notable Broad Dielectric Relaxation and Highly Efficient Red Photoluminescence in a Perovskite-Type Compound: (N-Methylpyrrolidinium)MnCl₃

Multifunctional-material-integrated various properties have been an attractive research field. In spite of persistent explorations into such materials, the conditions of coexistence are still confused. Organic–inorganic hybrid compounds are appropratie for designing these materials because of both their rich properties and flexible compositions. Here, a perovskite-type organic–inorganic hybrid compound, (Hmpy)MnCl3 (1; Hmpy = N-methylpyrrolidinium), with temperature, light, and electric stimuli-response characteristics has been rationally designed and synthesized. This hybrid compound shows a dielectric anomaly, a broad dielectric dispersion of the temperature range from 296 to 400 K, and brilliant red fluorescence at 632 nm with a high quantum yield of 54.54% under UV excitation. The coexistence of temperature, optical, and electric multiple stimuli-response properties in 1 demonstrates that our finding has a profound influence on the further exploration of the novel multifunctional materials.