期刊
RSC ADVANCES
卷 8, 期 35, 页码 19585-19595出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra02226g
关键词
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资金
- National Natural Science Foundation of China [U1710117, U1610255, U1607120, 51603142]
- Shanxi Provincial Key Innovative Research Team in Science and Technology [2015013002-10, 201605D131045-10]
- Shanxi Provincial Key Research and Development Program [201603D111010]
- Key Laboratory of Interface Science and Engineering in Advanced Materials opening project (Taiyuan University of Technology), Ministry of Education [KLISEAM201502]
Green fluorescent carbon dots (CDs) were synthesized with pyrogallic acid as carbon source by solvothermal method in N,N-dimethylformamide (DMF). During the formation of the CDs, DMF not only serves as solvent for reaction, but also as nitrogen source to participate in the reaction. At the same time, it promotes the formation of large conjugated sp(2)-domain in CDs. The prepared CDs have an average size of 11.9nm, excitation-independent emission centered at 520 nm and fluorescence quantum yield of 16.8%. For practical applications, warm white light-emitting diodes were fabricated by combining the CDs/N-[3-(trimethoxysilyl)propyl]ethylenediamine (KH-792) mixture with UV chip, which emitted warm white light with color coordinates of (0.39, 0.47) and a correlated color temperature of 4323 K suitable for indoor lighting.
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