Tunable Emissions in Zero‐Dimensional (C₆H₅CH₂NH₃)₃InBr₆ Enabled by Controlled Structural Amorphization

Aggregate, Год журнала: 2025, Номер unknown

Опубликована: Фев. 2, 2025

ABSTRACT Zero‐dimensional (0D) hybrid metal halides (HMHs) hold great promise as multifunctional emitters. However, precise functionalization of organic moieties and controlled modulation self‐trapped exciton (STE) emission from inorganic polyhedra remain challenging. This study introduces 0D (PMA) 3 InBr 6 (PMA + = C H 5 CH 2 NH ) a emitter, leveraging pressure‐induced structural regulation to control photoluminescence properties. Increasing pressure leads simultaneous contraction distortion 3− octahedra, shifting the STE color orange green. At high compression, amorphization quenches emission, but upon release, bright cyan PMA cation emerges, with intensity approximately 21 times stronger than that initial emission. The enhanced is attributed altered molecular configurations, disrupted intermolecular contacts, reduced lattice vibrations, collectively suppressing excimeric coupling minimizing nonradiative losses in recovered amorphous phase. Furthermore, conversion also achieved via laser‐induced amorphization, expanding potential for direct laser writing sensitive detection applications.

Язык: Английский

Melt‐Processing Enabled Flexible Metal Halide‐Nylon Luminescent Films with Enhanced Optical Transmission for Curved X‐Ray Imaging

Advanced Functional Materials, Год журнала: 2025, Номер unknown

Опубликована: Апрель 21, 2025

Abstract Organic–inorganic hybrid metal halides are emerging as a class of functional materials that combine attractive photophysical properties with great processability. Their modular chemical structures allow for melt processing through crystal‐melt transitions. Herein, the study reports synthesis (Bzmim) 2 MnX 4 (Bzmim = 1‐benzyl‐3‐methylimidazolium, X Cl, Br, I) single crystals low melting temperatures ranging from 130 to 160 °C. Among them, MnBr exhibits superior luminescence performance photoluminescence quantum yield 78.6% and light 34 900 photons MeV −1 , making it act promising scintillator. Interestingly, leveraging fluidity porous structure nylon film, transparent crystalline ‐Nylon composite film is fabricated by melt‐infiltration process. Compared has an increased transmittance ≈20% >60%. It can be attributed uniform crystallization in pores which suppresses severe crosstalk caused large refractive index difference at nylon‐air interface. The melt‐processable spatial resolution 16 line pairs per millimeter practical X‐ray imaging, well applications curved imaging due its flexibility.

Язык: Английский