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8612952 
Journal Article 
Microwave-assisted in situ large scale synthesis of a carbon dots@g-C3N4 composite phosphor for white light-emitting devices 
Meng, L; Ushakova, EV; Zhou, ZJ; Liu, ES; Li, D; Zhou, D; Tan, ZN; Qu, SN; Rogach, AL 
2020 
4 
2 
517-523 
English 
WOS:000513242900013 
Sustainable, environment-friendly phosphors produced from cheap and readily available precursor materials using green preparation processes are in high demand for lighting applications. Herein, a composite phosphor comprising carbon dots (CDs) and graphitic carbon nitride (g-C3N4) is prepared on a large scale from citric acid and urea in water, through a green microwave assisted in situ heating method. An optimized CDs@g-C3N4 composite with a 1 wt% loading of CDs shows a strong green emission under 410 nm excitation, with a photoluminescence quantum yield of 62% in the solid state. Using this composite as a phosphor in the color conversion layer, a white light emitting diode with a power efficiency of up to 42 lm W-1 is fabricated. 
SOLID-STATE; PHOTOLUMINESCENCE; EMISSION; NITRIDE