Red-Emissive Center Formation within Carbon Dots Based on Citric Acid and Formamide
JOURNAL OF PHYSICAL CHEMISTRY LETTERS(2023)
Abstract
The formation of red-emissive optical centers in carbon dots based on citric acid and formamide was investigated by varying the synthesis parameters with focus on finding optimal & horbar;necessary and sufficient & horbar;amount of precursors to decrease byproduct amount and to increase the chemical yield of red-emissive carbon dots. The emission is observed at 640 nm excited at 590 nm and quantum yield reaches up 19%. A high chemical yield of carbon dots of 26% was achieved at an optimal molar ratio of citric acid to formamide of 1:4.
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