Novel characteristics of CQDs synthesized by electrochemical method

In this research, carbon quantum dots were obtained using an electrochemical method. The structural, electrical, and optical properties of the carbon quantum dots samples were studied. The synthetic results showed that the particle size of the CQDs using X-rays was about 2 nm, while the results of scanning electron microscope showed that the particle size was 20 nm. The X-ray results also showed that the material formed was highly crystalline and in one direction. Fourier transition infrared examination revealed the presence of strong carbon–carbon bonds at 1577 cm⁻¹. While the results of the electrical properties showed that the free carrier concentration was 1.295 × 10¹² cm⁻² of quantum dots and have p type. The results of the optical properties represented by absorption and fluorescence spectra confirmed the formation of nanoparticles through the results of the energy gap (3.6 eV) and the formation of surface states. The thickness of the prepared films was 900 nm.