Coordination units of Mn²⁺ modulation toward tunable emission in zero-dimensional bromides for white light-emitting diodes

Abstract

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...

Electron–Phonon Coupling Mediated Self-Trapped-Exciton Emission and Internal Quantum Confinement in Highly Luminescent Zero-Dimensional (Guanidinium)6Mn3X12 (X = Cl and Br)

“…The interelectronic repulsion Racah parameter ( B ) and crystal-field splitting (Δ) are obtained as ∼777 and 8629 cm –1 , respectively. Furthermore, excitation peaks at 427 and 445 nm make it viable for optoelectronic applications …”

“…Furthermore, excitation peaks at 427 and 445 nm make it viable for optoelectronic applications. 52 Figure 2b (red line) demonstrates the steady-state PL spectrum for GuMBr. The broad emission spectrum ranges from 560 to 780 nm with a full-width at half maximum (fwhm) of ∼85 nm and exhibits a PLQY of ∼49.7%.…”

Realizing High-Efficiency Yellow Emission of Organic Antimony Halides via Rational Structural Design

“…To date, many low-dimensional lead-free metal halides with different optical active centers (e.g., Sn 2+ , Mn 2+ , Cu + , Sb 3+ , In 3+ ) have been developed. − Compared with typical 3D LHPs, the bulk low-dimensional lead-free metal halides exhibit fascinating optical properties and have made remarkable achievements in optoelectronic devices due to the strong structural quantum confinement at the molecular level. Among low-dimensional metal halides, zero-dimensional (0D) metal halides have a special existence; that is, the isolated metal halide clusters are periodically distributed in the host framework formed by organic cations or large alkaline metals, forming a unique “host–guest” structure.…”

Photophysical and Magnetic Properties in Zero-Dimensional (H2DABCO)MX4·nH2O (M = Mn and Cu; X = Cl and Br; n = 0, 1, and 4)

“…Further, copper­(II)-based OIH halides demonstrate multifunctional properties. − This Jahn–Teller active cation undergoes structural transformation resulting in a change in emission color . Hence, multifarious approaches have been made to design OIH halides to incorporate manganese­(II) ion in different coordinations, mainly by varying the organic cations, , but OIH halides manifesting different coordination geometry without changing the organic cations are rare. , We attempted to synthesize new OIH halides with different Mn 2+ coordination geometry to explore fascinating photophysical and magnetic properties, which we report in this article.…”