The different hydrogen bond interactions in two organic–inorganic hybrid manganese halide compounds, namely [A]₂[MnBr₄] (A = N-butyl-N-methylpyrrolidinium ([P14]⁺) for (1) and N-butyl-N-methylpiperidinium ([PP14]⁺) for (2)), lead to distinct photoluminescence quantum yields (81% for 1; 55% for 2). Further applications of luminescent 1 are also developed.

The room-temperature phosphorescence quantum efficiency of [BPy] ₆ [Pb ₃ Br ₁₂ ] has been improved by a maximum of fourteen-fold through sensitization of thiadiazole-based molecules.

Recently, organic–inorganic hybrid lead halides have been explored as photoluminescent (PL) materials with flexible structural tunabilities and high photoluminescence quantum efficiencies, which can be modified by the structure regulating functions of organic cations. Here, by adopting different saturated organic cations as structure directing agents (SDAs), a series of organic–inorganic hybrid lead halides have been solvothermally synthesized and characterized with different structural types. Compound [(CH₃)₂NH₂]₂[H₂DABCO]₂Pb₃I₁₂ (1, DABCO = 1,4-diazabicyclo[2.2.2]-octane) features a linear zero-dimensional (0D) [Pb₃I₁₂]⁶⁻ trimer, and [(Me)₆-en]₂Pb₃I₁₀ (2) and [H₂N-Prpipz]₂Pb₃Br₁₀ (3) contain two different types of one-dimensional (1D) [Pb₃X₁₀]⁴⁻ chains based on the C₃-symterric [Pb₃X₁₁] trimer and [PbX₆] unit, respectively. In the structures of H[(Me)₂-DABCO]Pb₃I₉ (4) and H[(Me)₄-pipz]Pb₃I₉ (5, pipz = piperazine), the C₃-symmetric [Pb₃I₁₁] trimers are interlinked to form the same two-dimensional (2D) corrugated [Pb₃I₉]³⁻ layers. Under the excitation of UV irradiation, these hybrid lead halides exhibit tunable luminescence properties from yellow, orange to red emissions with the largest Stokes shift of 335 nm. The PL nature is also investigated based on temperature-dependent PL emission, time-resolved PL and theoretical calculations, etc. These hybrid lead halides provide new types of structural models to probe into the PL properties and understand the underlying structure–property relationship.

In recent years, organic–inorganic hybrid metal halides have emerged as a highly promising class of semiconducting light emitting diodes (LEDs) due to their fascinating photoluminescence properties. Here, by specifically selecting different organic cations as templates, a series of new hybrid cuprous halides have been solvothermally prepared, namely [Me-Py]CuI₂ (1), [(Me)₂-DABCO]Cu₂I₄ (2), [Me-MePy]Cu₂I₃ (3), and [H₂DABCO]Cu₃X₅ (X = I (4) and Br (5)). These hybrid cuprous halides feature one-dimensional (1D) [CuI₂]⁻, [Cu₂I₃]⁻ and [Cu₃X₅]²⁻ (X = Br, I) chains surrounded and charge-balanced by organic cations. Under UV photoexcitation, these hybrid cuprous halides exhibit strong tunable photoluminescence from cyan (480 nm) to red (675 nm) emissions with large Stokes shifts (345 nm). The intrinsic nature of PL emissions is also investigated based on temperature-dependent PL emission, lifetime, photoluminescence quantum efficiencies, etc.