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In recent years, metal halide perovskites have been developed to create materials that are nontoxic and highly luminescent. Tin, copper, germanium, zinc, bismuth, and other lead-free perovskites have been produced the potential applications in optoelectronic devices. Here, the zero-dimensional hybrid inorganic-organic perovskite structure of hexaimidazolium tetrachloromanganate(II) hexachloromanganate(II), (C 3 H 5 N 2 ) 6 [MnCl 4 ][MnCl 6 ] or HImMC, with red Mn 2+ -centered phosphorescence at 660 nm with (t 2g ) 3 (e g ) 2  → (t 2g ) 4 (e g ) 1  electronic transition in octahedral geometry and stability under high temperature (∼450 K), is reported. The optical band gap of HImMC is about 3.8 eV. Moreover, this 0 D hybrid perovskite exhibit large ferroelectric spontaneous polarization of 3.2 μC/cm 2  at room temperature. Hence, the newly described member of the 0 D organic-inorganic hybrid perovskite family holds significant promise for optoelectronic devices.

Multifunctional characteristics of zero-dimensional hybrid organic manganese chloride perovskites