Study on the effect of doping time of MEH-PPV:I-MWNT nanocomposite for organic solar cell application

The properties of nanocomposited MEH-PPV:I-MWNT thin film are reported by varying the time of doping of Iodine on multiwall carbon nanotubes (I-MWNT) in CVD (Chemical Vapor Deposition) to 15, 30, 60, 90 and 120 minutes. The iodine doping is known to change the electronic properties of carbon nanotubes. The multiwall nanotube was first annealed in oven for 30 minutes to ensure its graphitized structure is improved. The I-MWNT is then mixed with MEH-PPV solution then being sonicated for 1 hour. The yielded MEH-PPV:I-MWNT is being deposited on substrates by using spin coating technique. The characterization is to be done to investigate the optical, electrical and physical properties of the thin films. 15 minutes doping time is choosen as it exhibits the best conductivity, resistance and surface morphology.