Near-infrared luminescence of a novel zero-dimensional organic–inorganic hybrid molybdenum-based perovskite

In this work, a zero-dimensional organic-inorganic hybrid (C₉H₈N)MoCl₅·2H₂O perovskite synthesized for the first time showed excellent photoluminescence performance at 920 nm in the near infrared region. The material's characteristics and its near-infrared luminescence are systematically analyzed using X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy, and photoluminescence spectroscopy. The experimental results and theoretical calculations show that the near-infrared emission is from the d-d transition of Mo⁴⁺ and the quinoline cation in the structure is responsible for the separation and fixation of the structure. The hydrogen bonds in (C₉H₈N)MoCl₅·2H₂O crystals and the π-π interactions in Cl-Mo transitions significantly enhance near-infrared luminescence. Experimental results show that near-infrared phosphor conversion light-emitting diodes (pc-LEDs) based on this material exhibit excellent performance in practical applications, demonstrating their significant potential as efficient near-infrared light sources.