Photoluminescence Behavior Combined with Multiple Electrical and Optical Properties in Organic-Inorganic Hybrid Manganese (II) Halide Perovskite

Organic-inorganic hybrid materials have emerged as a potential candidate due to their fascinating properties for several optoelectronic applications. In this study, lead-free organic-inorganic hybrid perovskite single crystals [N(CH₃)₄]MnCl₃ were synthesized through a slow evaporation method using tetramethylammonium as the organic ligand. Systematic characterizations were carried out to reveal the crystal structure and other optoelectrical properties. A series of systematic characterizations were carried out in order to reveal the crystal structure as well as other optoelectrical features. Phase purity and morphology were confirmed by powder x-ray diffraction and scanning electron microscopy respectively. The crystal has a P 63/m space group which belongs to the hexagonal crystal system. The optical band gap was found to be 2.15 eV, and under the excitation of a suitable UV light source, it can emit 635 nm bright red lights with a full width at half maximum of 78 nm at room temperature. Thermal study indicates that the compound is stable up to 300 °C. The compound's electrical properties were studied using Impedance spectroscopy as a function of frequency from 20 Hz to 4 MHz at different temperatures. Finally, the successful achievement of luminescent printing was made possible by harnessing the exceptional photophysical properties of the material. The printed images demonstrated remarkable clarity even after undergoing multiple cycles and remained visible for a prolonged period of 15 days in an air environment, affirming the stability of the printed images. The information stored on the paper can be easily read using a UV lamp. Therefore, these findings highlight the material's outstanding photoluminescence and optoelectrical properties, suggesting its potential for promising applications in optoelectronics, including light-emitting diodes.