Thin films Aligned ZnO nanorods Amorphous carbon Amorphous carbon thin films Amorphous films Boron Boron-doped CELL Carbon films Carbon network Carbon source Chemical vapor deposition Doping (additives) Dye-sensitized solar cells ELECTRICAL-PROPERTIES Field emission microscopes Field emission scanning electron microscopy Fill factor Film preparation Fourier transform infrared spectroscopy High transmittance Hydrogenation I-V measurements Large surface area Metallic films Nanorods Nanostructures Negative bias Open circuit voltage Optical films