Resurfacing mixed-halide perovskite nanocrystal for efficient and spectral stable pure-red light-emitting diodes

Nano Energy, Journal Year: 2025, Volume and Issue: unknown, P. 110760 - 110760

Published: Feb. 1, 2025

Language: Английский

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Suppressing the Bottom Small n Phases of Quasi-2D Perovskites for High-Performance Photovoltaic Applications

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 5, 2025

The bottom small n phases in quasi-two-dimensional (Q-2D) perovskite films significantly hinder their photovoltaic performance development due to severely low conductivity and nonideal band alignment the corresponding solar cells. In this study, we successfully suppressed growth of Q-2D Ruddlesden-Popper (RP) (BA2MA4Pb5I16, ⟨n⟩ = 5) by introducing 2,7-bis(diphenylphosphoryl)-9,9'-spirobifluorene (SPPO13) as an additive into precursor solution. It is interesting find that hole transport layer poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) our p-i-n device can attract SPPO13 π-π stacking effect. As a result, concentrates at bottom, coordination between PbI2 leads more [PbI6]4- octahedra gathering downside film. Thereby, large remain unwanted are suppressed. optimized achieves remarkable power conversion efficiency 18.41%, which, according knowledge, highest value for BA-MA-based perovskite. Moreover, also demonstrates outstanding stability, maintaining 99.5% 95.3% initial after being stored over 3500 h under maximum point tracking operation 400 h, respectively. Unlike conventional methods primarily address bulk or interface properties, approach uniquely combines effects defect passivation through phosphine oxide groups, leading enhanced crystallinity, vertical orientation, nonradiative recombination. This work provides new regulate n-phase promote behavior

Language: Английский

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Nanocrystalline Perovskites for Bright and Efficient Light‐Emitting Diodes

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Abstract Nanocrystalline perovskites have driven significant progress in metal halide perovskite light‐emitting diodes (PeLEDs) over the past decade by enabling spatial confinement of excitons. Consequently, three primary categories nanocrystalline emerged: nanoscale polycrystalline perovskites, quasi‐2D and nanocrystals. Each type has been developed to address specific challenges enhance efficiency stability PeLEDs. This review explores representative material design strategies for these correlating them with exciton recombination dynamics optical/electrical properties. Additionally, it summarizes trends decade, outlining four distinct phases development. Lastly, this addresses remaining proposes a potential further advance PeLED technology toward commercialization.

Language: Английский

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Asymmetric Dimethyl‐Indenocarbazole Phosphonic Acid Molecules with Expanded π‐Conjugation for Inverted Perovskite Solar Cells

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 30, 2025

Abstract As successfully used in perovskite solar cells (PSCs), most carbazole core designs of self‐assembly monolayer molecules are still confined symmetrical configurations, limiting the progress their based p‐i‐n PSCs. Here, a π‐conjugation extended 7,7‐dimethyl‐5,7‐dihydroindeno[2,1‐b]carbazole (DMICPA) is designed and synthesized to effectively modulate its dipole energy level alignment, herein enhancing charge transport at interface. Meanwhile, two methyl groups on asymmetric indene structure can suppress molecular aggregation uniform space distribution DMICPA surface ITO. result, PSC achieves power conversion efficiency (PCE) 26.27% (certified 25.74%), which maintain 93% initial after 1000 h maximum‐power‐point tracking aging test following ISOS‐L‐2I protocol. Additionally, when utilized as p ‐dopants PSCs without pre‐depositing hole layers (HTLs), champion device also obtains PCE 25.40%. Both application scenarios overwhelm counterparts 4PACz. This work paves new way design SAM for efficient

Language: Английский

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Functional molecule surface infiltration treatment for efficient all-inorganic perovskite light-emitting diodes

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162787 - 162787

Published: April 1, 2025

Language: Английский

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Unveiling additive-driven crystallization-kinetics control for efficient ultrapure red perovskite light emitting diodes

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 158817 - 158817

Published: Dec. 1, 2024

Language: Английский

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