Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 12, Issue 19, Pages 4530-4536Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.1c01240
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Funding
- National Natural Science Foundation of China [61922091]
- Science and Technology Development Fund of Macau SAR [0040/2019/A1, FDCT/013/2017/AMJ]
- University of Macau [SRG2019-00163-IAPME, MYRG2018-00086-IAPME]
- National Key Research and Development Program of China [2019YFE0112200]
- Wuyi University-Macau University Joint Research Fund [2019WGALH08]
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A one-step synthesis method of solid-state emissive CDs was developed by introducing AlCl3 in citric acid and urea, leading to enhanced green emissions with a PLQY of 72.7% in the solid state through Al-based cross-linked polymerization on the surface of the CDs.
Aggregation-induced luminescence quenching of carbon nanodots (CDs) is the main obstacle for their applications in solid-state light emitting devices. Herein, we developed a one-step synthesis of solid-state emissive CDs with surface aluminum-based polymerization by adding AlCl3 in citric acid and urea via a microwave-heating dehydration process. Due to the strong coordination ability of Al ions with N and O atoms, considerable steric hindrance of Al-based cross-linked polymerization was introduced on the surface of the CDs, which not only avoided aggregation of the green emissive carbon cores but also facilitated efficient energy transfer from the blue emissive polymerized surface to the green emissive carbon cores in aggregates, leading to enhanced green emissions with a photoluminescence quantum yield (PLQY) of 72.7% in the solid state.
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