Synthesis of Fluorinated Tin Oxide (FTO) Using Sustainable Precursors and Additions of Graphene with Spray Coating Deposition Methods for Transparent Conductive Material Applications

Amun Amri, Rino Rinaldi, Khairat .

Abstract


Fluorine doped tin oxide (FTO) films were successfully synthesized on glass substrates via spray coating deposition methode for Transparent Conductive Material (TCM) applications. Non-toxic SnF2 was used as fluorine source to replace toxic HF or NH4F compounds. Effects of SnF2 content, repetition of spray deposition and the addition of graphene on the optical transmittance, electrical resistivity, morphology and adhesion of the films, were investigated using UV–vis spectrophotometer, multimeter, Scanning Electron Microscopy (SEM), and elcometer, respectively. The optical transmitance and resistance analyses revealed that generally the transparance and the resistivity of the films decreased with the increase of the SnF2 concentrations, likewise the increase of the deposition repetitions on the resistivity of the films. The FTO film synthesized using 10 mol% of SnF2 and 5x depositions showed the lowest electrical resistivity of 14,1 x 10-4 ?cm, while the lowest optical transmittance of 86,4% was showed by the film synthesized without the addition of SnF2 by once deposition. The addition of graphene made the transmittance decreased but electrical conductivity increased. The highest figure of merit (FoM) of  0,0453 x 104 ?-1cm-1 was showed by the film synthesized using 10% mol of SnF2 with 5x deposition repetition. Because of having good in electrical and optical properties, as well as smooth surface morphology and sufficient adhesion properties, F-doped thin film prepared by this green process is promising material for use as  transparent conducting material.


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