Organic-inorganic metal halides have become a multifunctional platform for manipulating photoluminescence due to high-efficient and tunable emissions, especially for lead-free Mn2+-based halides. Herein, the zero-dimensional (0D) bromides of (C5H14N3)2MnBr4 and...
The discovery of narrow-band luminescent materials remains an immense challenge to optimize the performance of white light-emitting diodes (LEDs). So far, the zero-dimensional (0D) Mn 2+based halides with near-unity narrow-band emissions have emerged as a class of promising phosphors in solid-state displays, but the related large-scale synthesis strategies have not been proposed and evaluated. Herein, we report an in situ synthetic process of 0D Mn 2+ -based halides and utilize (C 20 H 20 P) 2 MnBr 4 as a case to investigate the photoluminescence characteristics and the structural essence of ultrafast self-assembly. The bright green emission peak at 523 nm with a full width at half maximum of 48 nm for (C 20 H 20 P) 2 MnBr 4 is attributed to the d−d transition ( 4 T 1 − 6 A 1 ) of tetrahedrally coordinated [MnBr 4 ] 2− centers, and the fabricated white LED device shows a wide color gamut of 103.7% National Television System Committee (NTSC) standard. Remarkably, the experimental and theoretical results indicate that there are hydrogen bonding of C− H•••Br and weak van der Waals interactions between [C 20 H 20 P] + and [MnBr 4 ] 2− , resulting in the root for the realization of ultrafast self-assembly in 0D Mn 2+ -based halides. This work reveals a feasible and general synthesis method for preparing 0D Mn 2+ -based halides, thereby providing a possibility for their industrial application in solid-state displays.
Low-dimensional metal halides have emerged as promising platforms for the development of new-generation phosphor-converted light emitting diodes (pc-LEDs), in which the zero-dimensional (0D) hybrids with lone-pair ns2 state in particular...
Low-dimensional metal halides with ns2 lone-pair electrons have been recognized as a new generation luminescent emitter for various optoelectronic applications. However, the 5s2 configuration tellurium halides have not received substantial...
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