Efficient UV emission from carbon dots derived from a green-tea extract (IMAGE)
Caption
Ultraviolet-emitting carbon dots were synthesized from a renewable feedstock, a green-tea extract. When dissolved in water, they emit with a peak wavelength of 384 nm and a photoluminescence quantum yield of 17%. When they are dissolved in poorer solvents, the emission blue-shifts and the photoluminescence quantum yield increases significantly, which suggests that the carbon dots emit by aggregation-induced emission.
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Nano Research, Tsinghua University Press
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