Dual-Functional Carbon Dot Films: Blue-Light Filtration and Cyan-Light Conversion for Healthier White Light-Emitting Diodes

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-01-23 DOI:10.1021/acs.nanolett.4c06272

Junkai Ren, Jiaolong Liu, Dan Qu, Sikha Sanjay Menon, Bing Wei, Jia Wang

引用次数: 0

Abstract

Blue light emitted by commercial white light-emitting diodes (WLEDs) in the 440–470 nm range poses ocular health risks with prolonged exposure. Effective filtration is crucial for health-conscious lighting, but traditional filters often cause color distortion by completely removing blue emission. In this study, we address this challenge by synthesizing carbon dots (CDs) with strong absorption at 460 nm and bright cyan emission at 485 nm, featuring a photoluminescence quantum yield of 65% and a narrow full width at half-maximum of 30 nm. When embedded in a poly(vinyl alcohol) (PVA) matrix, the CDs@PVA films effectively filter UV-to-blue light, reducing the blue-light ratio from 27.2% to 2.7%. At the same time, the cyan emission preserves the white light’s spectral composition, achieving a color rendering index of 83 ± 5. This dual functionality demonstrates the potential of CDs to enable safer WLEDs that improve both ocular health and lighting quality.

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双功能碳点薄膜：用于更健康的白光发光二极管的蓝光过滤和青色光转换

商业白光发光二极管（wled）在440-470纳米范围内发出的蓝光会对眼睛健康造成长期暴露风险。有效的过滤对于注重健康的照明至关重要，但传统的滤光片通常会通过完全去除蓝色发射而导致颜色失真。在这项研究中，我们通过合成碳点（CDs）来解决这一挑战，该碳点在460 nm处具有强吸收，在485 nm处具有明亮的青色发射，具有65%的光致发光量子产率和30 nm的半峰窄全宽度。当嵌入聚乙烯醇（PVA）基质中时，CDs@PVA薄膜有效地过滤了紫外线到蓝光，将蓝光比从27.2%降低到2.7%。同时，青色发射保留了白光的光谱组成，实现了83±5的显色指数。这种双重功能证明了cd的潜力，使更安全的wled，改善眼健康和照明质量。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.