Manganese-Based Halogen Regulation Enhances Photoluminescence Efficiency Engineering
Han Yan, Lei Pan, Ming Zhu, Feng-Wen Zhang, Changfeng Wang, Zhi‐Xu Zhang, Yi Zhang, Da‐Wei Fu, Gele Teri
Abstract
Organic–inorganic hybrid halides flourish due to their thermal stability, plasticity, and optical properties. However, performance optimization through reasonable regulation has always been a challenge. Diverse anions offer a broad range of possibilities and options for the development of stimulus-responsive materials, thereby facilitating performance optimization. Here, we have successfully synthesized two organic–inorganic photoluminescent hybrid halides, (NNDP) 2 MnX 4 (NNDP = N, N -dimethylpiperidinium chloride; X = Cl, Br), with a significant enhancement in photoluminescence quantum yield (4.38% → 39.91%) via halogen modulation. The increase in quantum yield is attributed to the distortion in the [MnX 4 ] 2– tetrahedron. Furthermore, the phase-transition temperatures of (NNDP) 2 MnCl 4 and (NNDP) 2 MnBr 4 were determined as 347 and 335 K, respectively, through thermodynamic measurement. Meanwhile, the intermolecular forces of (NNDP) 2 MnCl 4 and (NNDP) 2 MnBr 4 were analyzed using a Hirshfeld surface and a two-dimensional (2D) fingerprint. This study injects new innovative ideas for the design of novel photoluminescent materials.