Designed optimization of photoluminescence emission for carbon dots with bright blue emission at 416 nm and mono-exponential decay lifetime

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2025-04-22 DOI:10.1016/j.matlet.2025.138615

Mohammed Abbas Ruwaih , Ehsan Soheyli , Jalil Naji , Evren Mutlugun , Tavan Kikhavani , Reza Sahraei

引用次数: 0

Abstract

The presented study introduces optimized blue-emissive carbon dots (CDs) with high photoluminescence efficiency up to 65 % at 416 nm, large Stokes shift (69 nm), and full-width at half maximum (FWHM) of 73 nm. X-ray photoelectron spectroscopy confirmed the formation of carbon-based bonds as the main component of CDs, with reliable amounts of O, S, and N as dopant components. These features, along with single-exponential time-decay profile at long average lifetime of 10.05 ns, supported the significant role of uniformly distributed mid-gap energy levels in the recombination process. The simplicity, low-cost, non-toxicity, and short reaction time of CDs, along with their excellent emission properties in the deep-blue region, make them suitable for use in environmental monitoring and high-contrast bioimaging.

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设计了416 nm亮蓝色发光碳点的光致发光优化和单指数衰减寿命

本研究引入了优化后的蓝致碳点（CDs），其在416 nm处的光致发光效率高达65%，Stokes位移大（69 nm），半峰全宽（FWHM）为73 nm。x射线光电子能谱证实了碳基键的形成是CDs的主要成分，O、S和N作为掺杂成分的数量是可靠的。这些特征，以及平均寿命为10.05 ns的单指数时间衰减曲线，支持了均匀分布的中隙能级在复合过程中的重要作用。cd具有简单、低成本、无毒性、反应时间短等特点，在深蓝区域具有优异的发射特性，适用于环境监测和高对比度生物成像。

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

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive