Electrical and optical properties of nanocomposites MEH-PPV: CNT thin film/ Zulhelmi Serad

This paper investigates the electrical and optical properties of nanocomposites MEHPPV:CNT thin film with different composition ratio of CNT. CNT was prepared using palm oil as precursor and ferrocene as catalyst in the furnace of the ATOMIZER equipment. The thin film was deposited on the glass substrate by using spin coating technique. The influence of composition ratio of CNT on the electrical properties and optical properties of conjugated polymer MEH-PPV was characterized by current-voltage measurement in dark and under illumination, also UV-VIS-NIR spectrophotometer. The current-voltage measurements are show relationship between conductivity and resistivity of thin film. Degree of slope determines resistance and resisivity of the thin film. The conductivity of thin film will be affected by some factor such as thickness and resistivity of thin film. For electrical properties, it was found that conductivity of nanocomposites MEH-PPV:CNT thin films are increasing as increasing composition ratio of CNT. The optical properties of thin film were examined using UV-Vis-NIR spectrophotometer for transmittance, absorption, and optical band gap energy. By using UV-VIS-NIR spectrophotometer measurement show the optical band gap decreases when composition ratio of CNT increases.