Space-confined charge transfer turns on multicolor emission in metal-organic frameworks via pressure treatment

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Май 5, 2025

Single-component multi-emissive materials with stimuli-responsive properties offer unique advantages in the field of multicolor-tunable photoluminescence (PL). However, precisely modulating emission each component and achieving high-efficiency present a formidable challenge. Herein, we demonstrate that space-confined charge transfer (CT) turns on bright blue-green-white initially faintly emissive metal-organic frameworks (MOFs) at ambient conditions through pressure treatments. Pressure treatments induce transition from initial long-range CT to mode, significantly amplifying radiative transitions. Furthermore, CT, which occurs between mutually perpendicular ligands, influences spin-orbit intersystem crossing. Precise tuning kinetics via multi-level allows us modulate fluorescence-to-phosphorescence ratio, target MOFs. Our work advances development smart PL unlocks potential for their application atmospheric environments.

Язык: Английский

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Self-Trapped Excitons or Bi³⁺ Ions for Broad Emission in a Lead-Free Double Perovskite? Hearing What Pressure Says

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Май 28, 2025

The broad emission origin of lead-free double perovskites with ns2-metal ion doping remains a long-standing controversy. Herein, pressure is introduced as robust tool to determine the mechanism from Cs2AgIn0.9Bi0.1Cl6 nanocrystals (NCs). negative correlation between crystal field strength and wavelength under compression corroborates that indeed attributed radiative recombination self-trapped excitons, ruling out Bi3+ 3Pn (n = 0, 1, or 2) 1S0 an alternative mechanism. composed two types states due different structures BiCl6-AgCl6 InCl6-AgCl6. abnormal enhancement within range 5.01-10.01 GPa results local distortion BiCl6 octahedra increases exciton-phonon coupling strength. Our study elucidates long-term dispute about in NCs, representing significant step forward precise design synthesis targeted perovskite materials.

Язык: Английский

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Pressure-induced photo responsiveness enhancement and positive–negative switch in ZrSe2

Applied Physics Letters, Год журнала: 2024, Номер 125(9)

Опубликована: Авг. 26, 2024

ZrSe2, a member of the group-IVB transition metal dichalcogenides, shows favorable performance in optoelectronic applications. Here, photoelectric properties ZrSe2 under high pressure have been systematically investigated. At 13.5 GPa, photocurrent increases three orders magnitude greater than its initial value. Interestingly, above 23.5 exhibits negative response, which can be attributed to photothermal effect caused by pressure-induced metallization. This study demonstrates critical role regulating layered materials and potential application pressure-responsive devices.

Язык: Английский

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Anomalous Pressure‐Induced Blue‐Shifted Emission of Ionic Copper‐Iodine Clusters: The Competitive Effect between Coprophilic Interactions and Through‐Space Interactions

Angewandte Chemie International Edition, Год журнала: 2024, Номер unknown

Опубликована: Сен. 26, 2024

Developing ionic copper-iodine clusters with multiple emitting is crucial for enriching lighting and display materials various colors. However, the luminescent properties of traditional are often closely associated low-energy cluster-centered triplet emission, which will redshift further as Cu⋅⋅⋅Cu bond length decreases. This article utilizes a pressure-treated strategy to achieve an anomalous pressure-induced blue-shifted luminescence phenomenon in Cu

Язык: Английский

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Pressure-induced emission in 0D metal halide (EATMP)SbBr5 by regulating exciton-phonon coupling

Chinese Journal of Structural Chemistry, Год журнала: 2024, Номер 43(7), С. 100333 - 100333

Опубликована: Май 11, 2024

Язык: Английский

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