• Permono Adi Putro Universitas Muhammadiyah Prof. Dr. Hamka
  • Liszulfah Roza Physics Education, Faculty of Teacher Education and Science, University of Muhammadiyah Prof. Dr. Hamka, Pasar Rebo, East Jakarta 130830 Indonesia
  • Isnaeni Isnaeni Research Center for Physics, Indonesia Institute of Science, Building 442, Puspitek Serpong, South Tangerang, Banten 15314 Indonesia
Keywords: carbon dots, cassava peels, photoluminescence


Carbon dots (C-dots) have been successfully synthesized from cassava peels using the hydrothermal method. The C-dots are further passivated using poly (ethylene glycol) (PEG) with a variation of the volume of 0.5 ml, 1.0 ml, and 1.5 ml. The properties of photoluminescence C-dots before and after PEG were characterized using photoluminescence (PL) and time-resolved photoluminescence (TRPL) spectrophotometers. PEG succeeded in influencing PL C-dots properties, such as peak wavelength, PL intensity, and electron time decay. The addition of 0.5 ml of PEG to C-dots is the optimum condition and best with the peak wavelength, the PL intensity and, time decay electron is 507.52 nm, 5302 a.u, and 3.794031133 ns, respectively.


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