Highly Thermostable Hybrid Manganese Bromide as a Narrow-Band Green Phosphor for Backlight Displays.

Authors

Chenning Sun, Siyu Zhang, Kangkang Wang, Sha Bai, Zuobin Tang, Binbin Su, Huidong Xie

Published in

Inorganic chemistry. Jul 20, 2026. Epub Jul 20, 2026.

Abstract

Zero-dimensional manganese-based halides are distinguished by their advantages, such as high luminescence efficiency, tunable spectra, and straightforward preparation. However, the challenge of synergistically enhancing their luminescence and thermal stability remains a critical issue. Here, we synthesized a novel Mn(II)-based metal halide of (Meop)₂MnBr₄ (Meop = 1-(2-methoxyphenyl)piperazine). Characterized by a distinct d-d transition of Mn²⁺, this material demonstrates a narrow-band green emission centered at 521 nm. It emits with a full width at half-maximum of merely 41 nm and achieves a near-unity photoluminescence quantum yield (99%). In addition, the color purity of (Meop)₂MnBr₄ was calculated to be 71.09%, which is higher than the 53.21% of the commercial phosphor β-sialon:Eu²⁺. Benefiting from its structure, (Meop)₂MnBr₄ demonstrates outstanding thermal stability, with its photoluminescence intensity at 430 K remaining 93% of the original value at 305 K. Based on the above advantages, we fabricated a white LED device using the (Meop)₂MnBr₄ powders. The WLED yields a luminous efficacy of 90.35 lm·W^-1 alongside a broad NTSC color gamut coverage of 105.7%. This work not only provides new light on the synthesis of high-performance luminescent materials but also paves the way for their practical deployment.

PMID:
42473857
Bibliographic data and abstract were imported from PubMed on 20 Jul 2026.

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