A Close-Space Fast Nucleation Strategy toward High-Efficiency Perovskite Light-Emitting Diodes

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-03-23 DOI:10.1021/acs.nanolett.5c00004

Xinwen Sun, Dongliang Ding, Zhiguo Nie, Bo Wu, Patrick W. K. Fong, Shirong Qiu, Ting Liang, Gang Li, Jianbin Xu, Mingzhu Long

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Abstract

Halide perovskite light-emitting diodes (PeLEDs), considered as potential candidates for future displays, face significant limitations in their external quantum efficiency (EQE) due to an uncontrollable nucleation and crystallization process. Herein, a close-space inverted annealing (CSIA) strategy is developed to achieve fast nucleation and obtain a more uniform perovskite film with larger crystal domains and much lower defect centers. The increased surficial temperature and quick solvent evaporation in the CSIA method result in the fast formation of numerous large nuclei and solvate intermediates at the initial stage, which effectively guide crystal growth into large domains, facilitated by the residual solvent. The CSIA-processed PeLED achieves a peak EQE of 25.8%, which is among the best values of near-infrared devices. Moreover, it is applicable to perovskite-emitting layers with different defect passivation agents. This straightforward approach highlights a great opportunity to boost the performance and commercialization of perovskite optoelectronic devices.

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.