THE EFFECT OF POLY (ETHYLENE GLYCOL) ON THE PHOTOLUMINESCENCE PROPERTIES OF CARBON DOTS FROM CASSAVA PEELS SYNTHESIZED BY HYDROTHERMAL METHODS

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)

Spektra: Jurnal Fisika dan Aplikasinya
Vol 4 No 1 (2019): SPEKTRA: Jurnal Fisika dan Aplikasinya, Volume 4 Issue 1, April 2019

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.