August 14, 2025Open Access

Rational design and synthesis of narrow-band emitting Eu(II)-based hybrid halides via alkyl thermal cleavage

LLLiang LiLiaoning Technical University JJJiance JinFujian Institute of Research on the Structure of Matter KHKai HanShihezi University

Key Points

Halides exhibited narrow-band emission with a full-width-at-half-maximum of 34-52 nm, indicating effective tunability.
Crystals synthesized from 25 organic cations demonstrated emissions across blue, cyan, and green spectra.
The approach involved alkyl thermal cleavage to enhance phase crystallization and compositional diversity.
Insights obtained are crucial for expanding hybrid halides as next-generation luminescent materials for photonics.],
simple_explanation
Eu(II)-based hybrid halides are special materials that can emit light in specific colors. These materials can be created using a method that involves heating them with certain organic molecules. Researchers found that by changing the length of these molecules, they could make the light emitted narrow-band, which is like tuning a radio to a specific station. This discovery can help create better materials for glowing technologies, making them useful in things like screens and lights. 🌈} } } } } } } } } } } } } } } }
} } } } } }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }} }

Abstract

Organic-inorganic hybrid metal halides have emerged as pivotal luminescent materials for versatile photonic applications. Nevertheless, prevailing chemical design and synthetic strategies of hybrid luminescent halides are constrained by limited compositional engineering and suboptimal phase crystallization. Herein, we propose a universal alkyl thermal cleavage route to design and grow Eu(II)-based hybrid halide crystals. By modulating the alkyl chain length of 25 organic cations, all the as-synthesized halides achieve narrow-band emission with full-width-at-half-maximum (34-52 nm) and tunable colors in the region of blue-cyan-green owing to the highly efficient 5d-4f transition of Eu(II). We further clarify that the tunable emissions are dependent on the combined effect of configuration, average radius, and distortion index of the Eu-X (X = Cl, Br, I) polyhedra. This work provides fundamental insights into the design principle of narrow-band emitting Eu(II)-based hybrid halides and expands the family of hybrid halides as next-generation luminescence materials for emerging photonic applications.

Ask AI

Helpful

Bookmark

View Full Paper