Thermal management towards ultra-bright and stable perovskite nanocrystal-based pure red light-emitting diodes

Nature Communications, Год журнала: 2024, Номер 15(1)

Опубликована: Авг. 2, 2024

Despite the promising candidacy of perovskite nanocrystals for light-emitting diodes, their pure red electroluminescence is hindered by low saturated luminance, severe external quantum efficiency roll-off, and inferior operational stability. Here, we report ultra-bright stable diodes manipulating Joule heat generation in nanocrystal emissive layer thermal management within device. Diphenylphosphoryl azide-mediated regulation surface synergistically enhances optical properties carrier transport layer, enabling reduced thus lowering working temperature. These merits inhibit ion migration CsPb(Br/I)3 film, excellent spectra Combined with highly thermal-conductive sapphire substrates implementation pulse-driving mode, exhibit an luminance 390,000 cd m-2, a peak 25%, suppressed half-life 20 hours, superior spectral stability 15 A cm-2.

Язык: Английский

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Dual-Ligand Red Perovskite Ink for Electrohydrodynamic Printing Color Conversion Arrays over 2540 dpi in Near-Eye Micro-LED Display

Nano Letters, Год журнала: 2024, Номер 24(12), С. 3661 - 3669

Опубликована: Фев. 26, 2024

The lack of stability red perovskite nanocrystals (PeNCs) remains the main problem that restricts their patterning application. In this work, dual-ligand passivation strategy was introduced to stabilize PeNCs and inhibit halogen ion migration during high-voltage electrohydrodynamic (EHD) inkjet printing. as-printed arrays exhibit highest emisson intensity least blue shift compared with samples other strategies under a high electric field EHD Combining green PeNC inks, single-color tricolor color conversion layer were successfully printed, minimum pixel size 5 μm spatial resolution 2540 dpi. coordinate CsPbBrI

Язык: Английский

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Light‐Emitting Diodes Based on Metal Halide Perovskite and Perovskite Related Nanocrystals

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Янв. 29, 2025

Abstract Light‐emitting diodes (LEDs) based on halide perovskite nanocrystals have attracted extensive attention due to their considerable luminescence efficiency, wide color gamut, high purity, and facile material synthesis. Since the first demonstration of LEDs MAPbBr 3 was reported in 2014, community has witnessed a rapid development performances. In this review, historical perspective is provided then comprehensive survey current strategies for high‐efficiency lead‐based LEDs, including synthesis optimization, ion doping/alloying, shell coating presented. Then basic characteristics emission mechanisms lead‐free perovskite‐related emitters environmentally friendly from standpoint different colors are reviewed. Finally, progress LED applications covered an outlook opportunities challenges future developments field provided.

Язык: Английский

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Synchronously Polishing the Lead-Rich Surface and Passivating Surface Defects of CsPb(Br/I)₃ Quantum Dots for High-Performance Pure-Red PeLEDs

Nano Letters, Год журнала: 2024, Номер 24(12), С. 3719 - 3726

Опубликована: Март 14, 2024

Mixed-halide CsPb(Br/I)3 perovskite quantum dots (QDs) are regarded as one of the most promising candidates for pure-red light-emitting diodes (PeLEDs) due to their precise spectral tuning property. However, lead-rich surface these QDs usually results in halide ion migration and nonradiative recombination loss, which remains a great challenge high-performance PeLEDs. To solve above issues, we employ chelating agent 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid hydrate (DOTA) polish meanwhile introduce new ligand 2,3-dimercaptosuccinic (DMSA) passivate defects QDs. This synchronous post-treatment strategy high-quality with suppressed an improved photoluminescence yield, enables us fabricate spectrally stable PeLEDs peak external efficiency 23.2%, representing best performance based on mixed-halide reported date.

Язык: Английский

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High-Entropy Design for 2D Halide Perovskite

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(29), С. 19748 - 19755

Опубликована: Июль 9, 2024

Hybrid halide perovskites are good candidates for a range of functional materials such as optical electronic and photovoltaic devices due to their tunable band gaps, long carrier diffusion lengths, solution processability. However, the instability in moisture/air, toxicity lead, rigorous reaction setup or complex postprocessing have been bottlenecks practical application. Herein, we present simultaneous configurational entropy design at A-sites, B-sites, X-sites typical (CHA)

Язык: Английский

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Highly efficient pure red light-emitting diodes through surface bromination of CsPbI3 perovskite nanocrystals for skin-attachable displays

Materials Today, Год журнала: 2024, Номер 75, С. 2 - 10

Опубликована: Апрель 9, 2024

Язык: Английский

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Surface matrix regulation of perovskite quantum dots for efficient solar cells

Energy & Environmental Science, Год журнала: 2024, Номер 17(16), С. 5756 - 5794

Опубликована: Янв. 1, 2024

This review comprehensively discusses the latest advances in surface matrix regulation of perovskite quantum dots and proposes opportunities challenges for high-performance solar cells.

Язык: Английский

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Strategies for Stabilizing Metal Halide Perovskite Light-Emitting Diodes: Bulk and Surface Reconstruction of Perovskite Nanocrystals

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Март 7, 2025

Light-emitting colloidal lead halide perovskite nanocrystals (PeNCs) are considered promising candidates for next-generation vivid displays. However, the operational stability of light-emitting diodes (LEDs) based on PeNCs is still lower than those polycrystalline films, which requires an understanding defect formation in PeNCs, both inside crystal lattice ("bulk") and at surface. Meanwhile, uncontrollable ion redistribution electrochemical reactions under LED operation can be severe, also related to bulk surface quality a well-designed device architecture boost carrier injection balance radiative recombination. In this review, we consider reconstruction by enhancing rigidity rationally selecting ligands. Degradation pathways applied voltage discussed, strategies avoid undesirable migration PeNC films. Subsequently, other critical issues hindering commercial application LEDs including toxicity Pb perovskites, scale-up deposition design active-matrix prototypes high-resolution modules.

Язык: Английский

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Synthesis, characterization, and practical applications of perovskite quantum dots: recent update

Naunyn-Schmiedeberg s Archives of Pharmacology, Год журнала: 2024, Номер 397(12), С. 9633 - 9674

Опубликована: Июль 29, 2024

Язык: Английский

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Shiny quantum dots: synthesis, properties, and electroluminescent light-emitting diodes

Journal of Materials Chemistry A, Год журнала: 2024, Номер 12(34), С. 22417 - 22441

Опубликована: Янв. 1, 2024

We provide an overview of recent advances in the structure, preparation, and optical properties various quantum dots (QDs), discuss strategies for improving electroluminescence performance response to current challenges QD research.

Язык: Английский

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