Authors
Jiale Xu, Ruwei Song, Feiping Xiao, Yuecheng Xie, Jiejun Pan, Kaixuan Chen, Pingqi Gao, Jiancan Yu
Published in
Dalton transactions (Cambridge, England : 2003). Oct 09, 2026. Epub Oct 09, 2026.
Abstract
Zero-dimensional organic-inorganic hybrid metal halides have emerged as promising luminescent materials with structural diversity and tunable emission properties. However, it remains challenging to precisely control the metal coordination environment to suppress non-radiative recombination and improve the photoluminescence quantum yield (PLQY). Herein, we report an acid-solvent synergistic strategy that enables stepwise evolution of Sb coordination environments in hybrid halides. The non-emissive phase (H2PIP)[SbCl5]·H2O (1, PIP = piperazine), composed of edge-sharing [Sb2Cl10]4- dimers, transforms into an orange-emitting intermediate (H2PIP)5(H5O2)[SbCl5]2[SbCl6]Cl4 (2) with mixed discrete polyhedra, in the presence of HCl. Upon CH3CN incorporation, the mixed Sb coordination polyhedra transform into isolated [SbCl6]3- octahedra in green-emitting compound (H2PIP)2(NH4)[SbCl6]Cl2·CH3CN (3). Accompanying this evolution of coordination environments, the PLQY rises from <1% to 23.6% for the intermediate and ultimately reaches 90.4%. The enhanced PLQY originates from the expanded Sb⋯Sb distance and significant [SbCl6]3- octahedral distortion, which facilitate the formation and radiative recombination of self-trapped excitons. This work provides insights into acid-solvent directed coordination engineering for highly efficient Sb-based hybrid emitters.
PMID:
42853023
Bibliographic data and abstract were imported from PubMed on 09 Oct 2026.
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