The invention discloses a method for preparing TCO (Transparent Conducting
Oxide) glass online by a floating method and a special film plating device. The film plating device is characterized in that a film plating reactor is a rectangular structure comprising double channels for inputting gas and double channels for discharging gas; the film plating device is fixed above a floating-method
glass production line and the lower part of the film plating device is located in a temperature region of 630-650 DEG C in a floating-method glass
tin groove; the film plating reactor is further internally provided with six rectangular
oil cooling circulating cavities and two air discharging cavities; a mixing cavity is arranged between two side wall plates of a
central line and the width of the mixing cavity is 100-200mm; and an
aerosol guiding channel is arranged and the width of the
aerosol guiding channel is 10-30mm. The method comprises the following steps: (1) preparing a base film; and (2) mixing a
tin source, a
fluorine source
doping agent, a stabilizing agent and a catalyst precursor in the film plating reactor to form a TCO film layer. The method and the film plating device disclosed by the invention have the advantages of small investment, low cost,
operability and easiness for maintenance; the uniformity of the TCO film layer is good, the
wear resistance, the
conductivity and the visible light
transmittance are high; and the industrial production is easy to realize.