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Hydrothermal Synthesis of Carbon Quantum Dots (CQD’s) and Research of Composite Films Based on CQD’s

The paper is dedicated to hydrothermal synthesis of carbon quantum dots as well as to carbon quantum dots based composites with conductive polymer PEDOT:PSS. The morphometry of CQD’s was done and the electrical properties of composite film CQD/PEDOT:PSS (5%) in the range of temperatures from 77 K to 280 K were studied. It is shown that CQD/PEDOT:PSS (3%, 5%) films have globular structure with the size of globule of 320 nm in the case of CQD/PEDOT:PSS (3%) and 500 nm in the case of CQD/PEDOT:PSS (5%). The resistivity to temperature relation has a weak activation character with activation energy of ~ 1.68 meV, which may indicate that the transfer of charge carriers occurs due to the hopping conductivity between the impurity states in the bandgap.