Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 7, Issue 10, Pages 9301-9308Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b00325
Keywords
Carbon dots; Aggregation-induced luminescence quenching; Solid-state luminescence; Light-emitting diodes; Visible light communication
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Funding
- Youth Innovation Promotion Association of CAS
- Jilin Province Science and Technology Research Projects [20170101191JC, 20180101190JC, 20170101042JC, 20160520008JH]
- National Natural Science Foundation of China [51602304]
- Open Project Program of the State Key Laboratory of Supramolecular Structure and Materials in Jilin University [sklssm2019014]
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As a new type of luminescent material, carbon dots (CDs) have attracted increased attention for their superior optical properties in recent years. However, CDs generally suffer from aggregation-induced luminescence quenching, which means they are highly emissive in solution or a dispersed state but dramatically quenched in a solid or aggregated state. This problem significantly limits the application of CDs, partially in the solid-state light-emitting devices. In this work, a new kind of solid-state emissive CDs have been synthesized via simple one-step hydrothermal strategy. Under 450 nm excitation, the CDs exhibit bright green luminescence in the solid state, with a quantum yield of 26%. The luminescence lifetime of the CDs is only 4 ns. Employing the CDs as a color converter, white light-emitting diodes were fabricated and a visible light communication system with high performance (modulation bandwidth of 55 MHz, data transmission rate of 181 Mbps) was realized.
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