Industrial-Scale Fabrication of Mixed-Halide Perovskite Quantum Dots with High Comprehensive Performances for Red-Emitting Modules

IF 9.1 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Hanyan Huang, Jianwu Zhou, Qiuting Cai, Cuiping Zhou, Ningning Li, Xingliang Dai, Zhizhen Ye*, Haiping He* and Chao Fan*, 
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Abstract

The large-scale fabrication of mixed-halide perovskite quantum dots (QDs) with concurrently enhanced optical performances and stability remains a bottleneck for both fundamental science and industrial deployment. Herein, we demonstrate an industrial-scale synthesis of CsPbBr1.5I1.5 QDs encapsulated in a silica molecular sieve (MS) through a modified high-temperature solid-state strategy. Our study reveals that the higher chemical reactivity of cesium carbonate/lead halide precursors, compared to traditional cesium halide/lead halide, inhibits halide segregation in obtained CsPbBr1.5I1.5/MS composites and consequently boosts their optical performance (full width at half maxima of 29.2 ± 0.7 nm and photoluminescence quantum yield of 86.2 ± 2.2%). Comprehensive stability assessments confirm the robust durability of these CsPbBr1.5I1.5/MS composites against humidity, heating, light irradiation, and even mechanical stresses. Further, we demonstrate red-emitting modules based on these CsPbBr1.5I1.5/MS composites via polymer-compatible processing techniques, exhibiting potential applications in flexible wearable devices, wide color-gamut displays, and underwater illuminations.

Abstract Image

红发模组高综合性能混合卤化物钙钛矿量子点的工业规模制备
大规模制造同时增强光学性能和稳定性的混合卤化物钙钛矿量子点(QDs)仍然是基础科学和工业部署的瓶颈。在这里,我们展示了工业规模的合成CsPbBr1.5I1.5量子点封装在硅分子筛(MS)通过改进的高温固态策略。我们的研究表明,与传统的卤化铯/卤化铅相比,碳酸铯/卤化铅前驱体具有更高的化学反应活性,从而抑制了CsPbBr1.5I1.5/MS复合材料中的卤化物偏析,从而提高了其光学性能(半宽为29.2±0.7 nm,光致发光量子产率为86.2±2.2%)。综合稳定性评估证实了这些CsPbBr1.5I1.5/MS复合材料在湿度、加热、光照甚至机械应力下的耐用性。此外,我们通过聚合物兼容加工技术展示了基于这些CsPbBr1.5I1.5/MS复合材料的红色发射模块,展示了在柔性可穿戴设备,宽色域显示和水下照明方面的潜在应用。
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来源期刊
Nano Letters
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.
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