From lab to luminescence: Perovskite-based dimensional integrations pushing LED boundaries

Materials Today Physics, Journal Year: 2024, Volume and Issue: 46, P. 101490 - 101490

Published: June 22, 2024

Language: Английский

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Enhanced Optoelectronic Performance of Blue Quasi-2D Perovskite Light-Emitting Diodes Enabled by Diammonium-Functionalized Spacer

Journal of Luminescence, Journal Year: 2025, Volume and Issue: unknown, P. 121124 - 121124

Published: Feb. 1, 2025

Language: Английский

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Dimensional Control in Phase-Pure Coevaporated Quasi-2D Ruddlesden–Popper Structures

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

Fast, uncontrolled crystallization with several competing pathways makes solution-processing of phase-pure quasi-two-dimensional (quasi-2D) metal halide Ruddlesden-Popper thin films challenging. Typically, results in the formation different structural phases varying dimensionality ranging from 2D, to quasi-2D, and 3D, introducing bandgap disorder inhibiting charge transport. In this work, we eliminate interactions between precursor salts solvents by using controlled thermal coevaporation grow quasi-2D that show high phase purity narrow distribution. We study landscape synchrotron-based X-ray scattering charge-carrier dynamics ultrafast pump-probe spectroscopy. then demonstrate a strategy control crystallographic film through phosphonic acid-based surface modification. use density functional theory propylphosphonic acid organic precursors find loosely bound molecules evaporated precursors, followed migration acids deposited film, dictate structure 2D phases. These findings introduce new solvent-free methods for fabrication selectivity across dimensional (2D quasi-2D) structures.

Language: Английский

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Multi-site anchoring lead-halide octahedral by benzylphosphonic acid to regulate phase distribution for efficient PeLEDs

Nano Research, Journal Year: 2024, Volume and Issue: 17(11), P. 10034 - 10041

Published: Aug. 21, 2024

Language: Английский

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CsPbBr₃ Nanoplatelets via a Room-Temperature Postsynthetic Surface-Mediated Strategy for Blue Light-Emitting Diodes

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: 7(20), P. 24028 - 24036

Published: Oct. 15, 2024

All-inorganic blue-emissive CsPbBr3 perovskite nanoplatelets (NPLs) are promising for optoelectronic applications due to excellent optical properties, but their applicability is seriously restricted by a low photoluminescence efficiency and poor stability. Here, we develop postsynthetic surface-mediated engineering strategy prepare high-quality blue NPLs at room temperature using strongly bound polystyrene sulfonic acid (PSS). PSS efficiently passivates the surface trap sites of via strong coordination bonds, thereby achieving high-efficiency exciton recombination enhancing photostability. The optimized PSS-NPLs reveal intense emission with central wavelength ∼466 nm high quantum yield ∼83.2%, indicating substantial improvement from ∼48.3% pristine NPLs. Simultaneously, PSS-treated exhibit significantly enhanced stability in comparison during UV exposure thermal treatment. Finally, achieve efficient NPL-LEDs (peaked ∼468 nm) PSS-NPL-polymer composite film, corresponding CIE color coordinates (0.124, 0.067), which closely approach Rec. 2020 standard. Hence, our work offers facile fabricating high-performance promotes potential blue-emitting devices.

Language: Английский

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Dual functionality of carbazole-based phosphonic acid molecular additives realizes efficient hole transport layer-free perovskite light-emitting diodes

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158876 - 158876

Published: Dec. 1, 2024

Language: Английский

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Advancing Perspectives on Large-Area Perovskite Luminescent Films

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(18), P. 17343 - 17354

Published: Sept. 9, 2024

Language: Английский

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