Engineering Green- to Blue-Emitting CsPbBr3 Quantum Dots in Nanozeolite with High Stability for Backlight Display Application

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters Pub Date : 2024-12-11 DOI:10.1021/acs.nanolett.4c05132

Yuchi Zhang, Hongkai Li, Le Han, Yan Xu

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Abstract

The performance of blue devices utilizing perovskite quantum dots (PQDs) has lagged remarkably behind that of green light-emitting diodes because of low luminescence quantum yields and poor spectral stability. Here, benefiting from the rapid and short diffusion paths within the nanosized silicalite-1 (N-Si-1) zeolite (∼40 nm) channels, CsPbBr₃ PQDs encapsulated within N-Si-1 show a high dispersion with an ultrasmall particle size of ∼2.38 nm and a blue emission of 474 nm with a high photoluminescence quantum yield (PLQY) of 44.4%. Subsequently, the surface hydrophobization of CsPbBr₃-N-Si-1 using octadecyltrimethoxysilane (ODTMS) enables ultrastable blue luminescence. A white-light-emitting diode (WLED) device with CIE color coordinates (0.31, 0.28) was constructed by combining CsPbBr₃-M (blue), CsPbBr₃-N-Si-1 (green), and KSF:Mn⁴⁺ phosphor (red) on a 365 nm chip. This work introduces a feasible strategy to modulate the emission of CsPbBr₃ PQDs through a strong confinement effect within a hydrophobic nanozeolite matrix, offering promising applications in backlight displays.

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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.