Materials Today Nano, Journal Year: 2024, Volume and Issue: unknown, P. 100550 - 100550
Published: Nov. 1, 2024
Language: Английский
Coordination Chemistry Reviews, Journal Year: 2025, Volume and Issue: 528, P. 216425 - 216425
Published: Jan. 4, 2025
Language: Английский
Citations
1
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 4, 2024
Abstract The halide postdeposition treatment technique is a widely used strategy for mitigating defects in perovskite. However, when applied to mixed‐halide perovskites, it often leads surface and internal heterogeneity, which compromises luminescence performance spectral stability. In this work, blue 3D perovskites are engineered with acetate (Ac⁻)‐rich surfaces optimize the post‐treatment process achieve homogeneity. findings demonstrate that strong interaction between Ac⁻ ions Pb 2+ significantly reduces formation of vacancy caused by washing effect isopropanol during post‐treatment. This defect reduction slows infiltration into perovskite lattice, providing more time reconstruction minimizing accumulation introduced at surface. As result, mild redistribution occurs, promoting uniform phase. approach enabled development PeLEDs record external quantum efficiency 19.28% (emission peak 482 nm), comparable state‐of‐the‐art reduced‐dimensional perovskite‐based PeLEDs. Additionally, device demonstrated narrowband stable electroluminescence spectrum full width half maximum (FWHM) less than 16 nm.
Language: Английский
Citations
4
Inorganic Chemistry Communications, Journal Year: 2025, Volume and Issue: unknown, P. 113980 - 113980
Published: Jan. 1, 2025
Language: Английский
Citations
0
Solid State Ionics, Journal Year: 2025, Volume and Issue: 422, P. 116816 - 116816
Published: March 1, 2025
Language: Английский
Citations
0
Advanced Materials, Journal Year: 2025, Volume and Issue: unknown
Published: April 9, 2025
Abstract Perovskite light‐emitting diodes (PeLEDs) are emerging as strong candidates for next‐generation displays due to their outstanding optoelectronic properties, solution processability, and cost‐effectiveness. However, the development of highly efficient blue PeLEDs remains a significant challenge. Here, bottom‐up strategy is introduced precise charge manipulation in perovskites enhance radiative recombination efficiency. By employing 1,3‐bis(N‐carbazolyl)benzene an inserted hole transport layer, improved injection efficiency achieved while effectively suppressing reverse electron exciton quenching. Additionally, fluorinated ester additive incorporated control perovskite crystallization, facilitating formation well‐aligned reduced‐dimensional phases reduce nonradiative losses. The resulting exhibit record‐breaking external quantum 25.87%, highest reported one‐step‐prepared films. Furthermore, integration with thin‐film transistor circuits enables solution‐processed active‐matrix sharp uniform patterning. This work provides comprehensive pathway advancing toward high‐performance display applications.
Language: Английский
Citations
0
ACS Applied Electronic Materials, Journal Year: 2025, Volume and Issue: unknown
Published: April 19, 2025
Language: Английский
Citations
0
Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown
Published: May 2, 2025
Abstract Halide post‐treatment has emerged as a promising strategy for achieving pure‐blue emission in mixed‐halide perovskites by facilitating the incorporation of low‐solubility chloride while simultaneously passivating defects to enhance luminescence. Despite demonstrated success anion exchange, specific influence organic cations solutions remained insufficiently explored, limiting further optimization this technique. Here, role is investigated comparing two structurally similar halide agents, i.e., 4‐fluorophenylethylammonium (FPEA + ) and phenylethylammonium (PEA ). The findings reveal stark contrast their effects on 3D perovskite surfaces. Through enhanced surface binding fluorine‐induced hydrophobicity, FPEA mitigates lattice damage from solvent penetration during post‐treatment, enabling mild modification that better preserves structure effectively defects. Conversely, PEA treatment causes partial degradation perovskite, forming defective 2D/3D grain introducing new 2D layer inter‐grain regions. By replacing with conventional light‐emitting diode performance significantly enhanced, peak external quantum efficiencies 16.2% at 483 nm, 11.1% 475 7.6% 466 all devices exhibiting excellent color purity spectral stability.
Language: Английский
Citations
0
ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 27, 2025
Language: Английский
Citations
0
Chemical Communications, Journal Year: 2024, Volume and Issue: unknown
Published: Jan. 1, 2024
Advances in the understanding and applications of perovskite 2D/3D heterostructures were overviewed with a focus on ligand design principles.
Language: Английский
Citations
3
Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)
Published: Dec. 5, 2024
Blue perovskite light-emitting diodes (PeLEDs) still remain poorly developed due to the big challenge of achieving high-quality mixed-halide perovskites with wide optical bandgaps. Halide exchange is an effective scheme tune emission color PeLEDs, while making susceptible high defect density solvent erosion. Herein, we propose a versatile strategy for nondestructive in-situ halide obtain blue low trap and tunable bandgaps through long alkyl chain chloride incorporated chloroform post-treatment. In comparison conventional method, ionic mechanism present similar bimolecular nucleophilic substitution process, which simultaneously modulates inhibits new halogen vacancy generation. Consequently, efficient PeLEDs across spectral regions are obtained, exhibiting external quantum efficiencies 23.6% (sky-blue at 488 nm), 20.9% (pure-blue 478 15.0% (deep-blue 468 respectively. Zhang et al. report non-destructive by employing butylammonium post-treatment achieve tuneable bandgap LEDs, 23.6%, 20.9%, 15.5% peaks 488, 478, nm,
Language: Английский
Citations
2