苝
共轭体系
聚乙烯吡咯烷酮
材料科学
碳纤维
兴奋剂
荧光
纳米技术
吸收(声学)
量子产额
量子点
半最大全宽
发光二极管
表面改性
光化学
化学工程
化学
高分子化学
光电子学
光学
聚合物
复合材料
复合数
物理
工程类
作者
Cui-Xia Wu,Sainan Zhang,Mengdi Liu,Junhui He
出处
期刊:Carbon
[Elsevier]
日期:2024-09-03
卷期号:230: 119601-119601
标识
DOI:10.1016/j.carbon.2024.119601
摘要
Despite its significance for applications related to plant growth, the development of carbon dots (CDs) with bright red emissions still faces multiple obstacles. Herein, red emission hydrophobic carbon dots (RH-CDs) featuring one emission peak centered at 594 nm and a shoulder emission peak at 630 nm with a quantum yield of 34% and a wide full width at half maximum (FWHM) of 100 nm (580 nm–680 nm) were synthesized by adopting large conjugated perylene anhydride and aromatic amine precursors under solvothermal conditions. Density functional theory calculations support the method of using larger conjugated systems and higher graphite N doping to increase red emissions from CDs. With a post-surface functionalization strategy, polyvinylpyrrolidone (PVP)-modified RH-CDs (QY = 12%) were utilized as an anti-counterfeiting ink for information printing. Moreover, both blue-red light-emitting diodes (LEDs) and light conversion poly (methyl methacrylate) (PMMA)-CDs film were fabricated with emission spectra that are consistent with the absorption spectra of plants, suggesting that the prepared RH-CDs may have widespread application potential as a stable fluorescent material in plant growth.
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