Preparation of dual-emission peak lignin-derived carbon dots and their application in WLEDs

IF 3.5 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Hao Hu, Zhao Xia, Xiang Mao, Yongrun Dong, Wen Li, Jinkun Xue, Zequan Li, Wei Gao
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引用次数: 0

Abstract

White light-emitting diodes (WLEDs), as strong contenders for future solid-state light sources, hold significant promise in solid-state lighting due to their high efficiency, low power consumption, self-emission, and versatility. Carbon dots (CDs), a novel type of carbon nanomaterials, exhibit excellent luminescence properties. However, their intricate structure and unclear fluorescence mechanism hinder long-wavelength modulation, and solid-state aggregation leads to luminescence quenching, limiting their application in optoelectronic devices. This study focuses on the preparation of CDs with dual yellow–green emission peaks via a hydrothermal method using sodium lignosulfonate as a carbon source. The mechanism behind the dual emission is elucidated by analyzing the morphology and chemical composition of the CDs. Specifically, the green light originates from surface-related states due to N doping, while the yellow light results from the carbon-core state at higher hydrothermal temperatures. By incorporating these CDs into transparent wood, a material capable of emitting white light under blue light excitation is achieved. This transparent wood was successfully applied in the fabrication of WLEDs, providing valuable insights into CDs modulation and their utilization for white light solid-state lighting applications.

双峰木质素衍生碳点的制备及其在led中的应用
白光发光二极管(wled)作为未来固态光源的有力竞争者,由于其高效率、低功耗、自发光和多功能性,在固态照明领域具有重要的前景。碳点(CDs)是一种新型的碳纳米材料,具有优异的发光性能。然而,它们复杂的结构和不明确的荧光机制阻碍了长波长调制,并且固态聚集导致发光猝灭,限制了它们在光电器件中的应用。本研究以木质素磺酸钠为碳源,采用水热法制备了具有双黄绿色发射峰的CDs。通过分析CDs的形貌和化学成分,阐明了双发射的机理。具体来说,绿光来自于氮掺杂的表面相关态,而黄光来自于更高水热温度下的碳核态。通过将这些cd结合到透明木材中,一种能够在蓝光激发下发出白光的材料得以实现。这种透明木材成功地应用于wled的制造,为cd调制及其在白光固态照明应用中的应用提供了有价值的见解。
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来源期刊
Journal of Materials Science
Journal of Materials Science 工程技术-材料科学:综合
CiteScore
7.90
自引率
4.40%
发文量
1297
审稿时长
2.4 months
期刊介绍: The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.
文献相关原料
公司名称
产品信息
阿拉丁
sodium lignosulfonate
阿拉丁
citric acid monohydrate
阿拉丁
formamide
阿拉丁
sodium chlorite
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