Iodine doped multiwall carbon nanotubes in MEH-PPV:I-MWCNTs nanocomposite for organic solar cell applications

This paper discussed the effect of different composition ratio of Iodine doped multiwalled carbon nanotubes (I-MWCNTs) in MEH-PPV for organic solar cell applications. The I-MWCNTs compositions were varied from 0, 30, 50, 60 and 80 wt% and the effect to the electrical, optical and physical properties were investigated. The MWCNTs was doped with acceptor atoms which is Iodine, before it is being mix to the MEH-PPV solution. This nanocomposited MEH-PPV:I-MWNTs solution was deposited on glass and ITO substrates by spin coating technique. The photo-current showed linearly increased as the composition ratio increase, meanwhile the photoconductivity showed the highest value at 60 wt% with 0.16 Ω/m. This value is supported by the value of absorption coefficient which is around 9.7 × 10⁵ m^-1. Therefore, 60 wt% was used to fabricate organic solar cells, which gave efficiency around 0.0008%, V_oc = 0.094 V, J_sc = 0.031 mA/cm² and fill factor = 0.269.