Noble Metal Coating on Perovskite Microcrystals for Robust and Plasmonic Lasing Applications

Advanced Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 30, 2025

Abstract Lead halide perovskites (LHP) are solution‐processable semiconductor materials with high optical gain and broad wavelength tunability, making them well‐suited for laser applications. Here, a solution‐based method the 3D conformal coating of LHP microcrystals noble metals is presented. A nanoscale metal layer found to significantly enhance both performance environmental stability. This enables gold‐coated CsPbBr 3 be delivered into live cells, achieving single‐mode plasmonic lasing under pumping. Silver‐coated particles demonstrate stable in air. one‐pot synthesis opens new possibilities leveraging LHPs implant micro‐laser sources physical, biological, industrial systems.

Язык: Английский

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Two-dimensional organic-inorganic hybrid perovskite quantum-well nanowires enabled by directional noncovalent intermolecular interactions

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

Опубликована: Март 27, 2025

Abstract Layered 2D semiconductors, when grown into 1D nanowires, can exhibit excellent optical and electronic properties, promising for nanoscale optoelectronics photonics. However, rational strategies to grow such nanowires are lacking. Here, we present a large family of quantum-well made from organic-inorganic hybrid metal halide perovskites with tunable well thickness, organic spacer cations, anions, achieved by harnessing directional nonvalent intermolecular interactions among certain cations. The unusual anisotropic growth within the plane is induced preferential self-assembly selected cations along direction stronger further promoted crystal engineering. Owing intrinsic quantum-well-like structures photon confinement at subwavelength scale, these robust exciton-photon coupling, Rabi splitting energies up 700 meV, as wavelength-tunable more efficient lasing compared exfoliated crystals.

Язык: Английский

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Minute‐Level Room‐Temperature Switching and Long Cycle Stability of Thermochromic Inorganic Perovskite Smart Windows

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 19, 2025

Abstract Perovskite smart windows (PSWs) are widely investigated owing to excellent thermochromic properties, while restricted by poor transition performance and cycle stability. Herein, dimethyl sulfoxide vapor is utilized as an induction reagent for rapid reversible switching at room temperature between the colored bleached phases. To obtain PSWs with different optical properties performance, red CsPbIBr 2 , yellow Rb 0.5 Cs PbIBr brown CsSn 0.1 Pb 0.9 IBr prepared through alloying. The perovskites can exhibit 27.4–34.3 °C within 1.9–5.1 min. Even after 100 cycles, they remarkable stability of luminous transmittance (retention ≥97.4%) time ≥97.6%). Experimental characterization proves that occurs three‐dimension perovskite phase zero‐dimension phase. In field test (air = 21.6–26.5 °C), model houses a maximum indoor drop 4.2 °C. Furthermore, considerable modulation ability up 7.9 under solar simulator (temperature control house 60 °C). decrease in 20 days 2.9%, indicating long‐term This study offers prominent long

Язык: Английский

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Mass Production of Gradient Perovskite Nanowires via Microscale Thermal Engineering

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Янв. 20, 2025

The bandgap engineering of halide perovskites at microscopic level is challenging due to fabrication complexity, environmental sensitivity and material stability. Here we report a facile approach high-yield compositional graded perovskite nanowires (NWs) via vapor-phase anion exchange methods. Using rationally engineered thermal inhomogeneity along the length single NWs, arrays NWs with gradient across tens micrometers can be readily mass-produced bottom-up as well top-down strategies. These exchanged exhibit well-preserved single-crystallinity for efficient optical electrical transport, while their halogen stoichiometry, fluorescence, energy band structure demonstrate apparent axial gradient. Detailed analysis elemental distribution simulation reveal that ultralow conductivity together reduced dimensionality leads microscale temperature gradient, which further converted upon exchange. In addition, show excellent optoelectronic features suitable integration into functional devices. This work provides guidelines composition manipulation through engineering, extending applications in ultracompact microspectrometers, spectral imaging sensors, other miniaturized

Язык: Английский

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Printing perovskite and graphene parallel structure-based optical-mechanical sensors for human-machine interaction

Science China Technological Sciences, Год журнала: 2025, Номер 68(2)

Опубликована: Янв. 13, 2025

Язык: Английский

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Screw-Dislocation-Driven Growth of 2D Perovskite Spiral Microplates

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Фев. 14, 2025

Two-dimensional (2D) organic-inorganic halide perovskites are solution-processable semiconductors that promising for optoelectronic applications. Understanding crystallization mechanisms to achieve control over nanostructures is important optimizing desired properties. Here we introduce a versatile strategy synthesize spiral microplates of diverse 2D at the air-water interface through screw-dislocation-driven growth. Spirals 11 perovskite compositions (LA)2(A)n-1PbnX3n+1 with different spacer (LA) cations, A-cations, (X) anions, and n-number can be grown. They typically consist single- or few-layer step heights but exhibit stacking complexity when multiple dislocations interact. The characteristic optical properties (photoluminescence second-harmonic generation) underlying perovskites. Fluorescence-detected circular dichroism imaging shows chirality center does not translate observed chiroptical microplate, consistent length scale chiral distortion. This solution growth spirals diversifies microstructures optoelectronics other

Язык: Английский

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In-plane hierarchical assembly of two-dimensional molecular crystals toward on-chip multimode optical waveguides

Science Advances, Год журнала: 2025, Номер 11(10)

Опубликована: Март 5, 2025

Two-dimensional (2D) organic lateral heterostructures (OLHs) integrating two or more components have important potential applications in optoelectronics. However, the controlled synthesis of 2D OLHs with in-plane tunable emission remains a great challenge owing to difficulty sequential integration multiple components. Here, cascaded strategy is demonstrated for hierarchical assembly multicolor emission, from red-blue and red-green red-green-blue (RGB), size ~15 micrometers. The regions are realized by synergistic effects molecular doping method photo-induced oxidation route during epitaxial growth process. obtained can actively achieve full-spectrum light transport 420 720 nanometers depending on different excitation positions thus function as multimode RGB signal converters. These findings provide insights into development next-generation

Язык: Английский

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Dual Oxidation Suppression in Lead‐Free Perovskites for Low‐Threshold and Long‐Lifespan Lasing

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 17, 2025

Abstract Low lasing threshold and long‐term operational stability are essential in advancing cost‐effective, efficient lead‐free (tin) halide perovskite lasers. However, the rapid crystallization of tin perovskites oxidation Sn 2+ lead to substantial amounts lattice defects, detrimental laser performance enhancement. Herein, a dual suppression strategy is developed suppress 2D perovskites, i.e., adopting an oxygen‐free two‐step growth enhance crystal quality incorporating electron‐donating biuret molecules coordinate with during growth, which led reduction <1 µJ cm − 2 (PEA) MASn I 7 . This represents lowest value nanolasers approximately one order magnitude lower than those previously reported for tin‐based nanolasers. Investigations into spontaneous photoluminescence (PL) stimulated emission revealed that exhibited superior photostability compared their counterparts. Specifically, intensity MA 3 10 constantly increased by >300% under optical pumping decreased ≈17%, not observed The findings highlight prospect as gain materials cavities solution‐processed low thresholds exceptional stability.

Язык: Английский

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On-Crystal Optical Modulator from Polarized Propagation of Lanthanide-Titanium Nanoclusters

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Апрель 11, 2025

The orientation and magnitude of optical polarization in trivalent lanthanides (Ln³⁺) depend on the directional arrangement individual transition dipole moments (TDMs), rendering great difficulty achieving polarized propagation that is highly determined by packing symmetry compositional coordination atomic precision. Here, we obtained crystals organic-monolayer protected titanium-alloyed lanthanide nanoclusters (i.e., Eu₈Ti₁₀ NCs), where TDMs Eu³⁺ ions generate typically orthogonal behaviors π/σ-light) from ⁵D₀→⁷F_1,2 transition. Most importantly, Eu₈Ti₁₀ single crystal presents a remarkable with unprecedented anisotropy relevant to crystallographic axis, thus resulting an on-crystal modulator.

Язык: Английский

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One-dimensional lead halide perovskite quantum ribbons with controllable edge terminations and ribbon widths

Chem, Год журнала: 2025, Номер unknown, С. 102548 - 102548

Опубликована: Апрель 1, 2025

Язык: Английский

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