| The transparent conductive films have been applied in many fields because of the performance of light and electrical conductivity. In solar cells, transparent conductive films can not only increase the photoelectric conversion efficiency as base material, also can be used as electrode materials, the dust on the solar panels can be removed under the effect of electric field force after electrify. The way of dust removal is fast and efficient, so the research is of great significance. At the same time transparent conductive films can also cooperate with other functional films such as photocatalytic films, not only enlarged the application range, also can improve the effect of application. This paper mainly studied the preparation and properties of AZO transparent conductive films and TiO2light catalytic films t; analysis of dust removal by fork electrodes which are made of transparent conductive ITO films; and the dust removal research of different shape electrodes which are prepared on different substrates by the way of silk screen print technology. The concrete research contents are as follows:(1) Using self-designed and homemade level sedimentation device, AZO thin films were prepared on glass substrates in the method of liquid level sedimentation which is a new type of coating methods. The experiment studied the influence on thin film photovoltaic performance, crystallization properties and surface topography by the sol concentration, aluminum zinc ion concentration ratio, pretreatment temperature and coating layer. The optimized conditions are as follows:sol concentration is0.5mol/L, concentration rate between Al3+and Zn2+is4%, pretreatment temperature is450℃for10minutes,coating layer is20,dried under100℃for10minutes, level sedimentation velocity is5cm/min, annealing at550℃for2hours, then the light transmittance of the film is88%, square resistance is536Ω/□.(2) TiO2thin films were prepared on glass substrate with liquid level sedimentation method. This paper studied the effect of TiO2sol on wettability on glass substrate; the influence factors of film thickness, and the preparation of photocatalytic performance of the films. The results showed that photocatalytic properties of TiO2thin film was prepared is the best when the mass rate of PEG and Ti4+is1, don’t adjust the pH value of TiO2sol, settling velocity is7cm/min, dip Angle is30°.Its photocatalytic degradation rate is as high as52.1%after light3h. (3) The ITO fork electrodes of different electrode width and electrode gap were designed, removal rates of dust scattered on the surface of each piece of electrodes were studied in the conditions of different voltage, frequency, waveforms and duty ratio. The best conditions of dust removal are that voltage is1500v, frequency is15Hz, square wave, the duty ratio is10%, the electrode width is0.5mm, electrodes spacing is1.3mm. Under the best conditions, dust removal efficiency can be as high as99%.(4) By silk screen technology, tetragonal, spiral and fork electrodes with different width and spacing were printed respectively on the paper, wood, glass and film using conductive silver pulp for ink. The electrodes’ dust removal efficiencies were studied under the best conditions which were got by dust removal experiments of ITO fork electrode. Experimental results show that different shapes of electrodes are able to dust, but the efficiency of parallel fork electrodes is the best, up to88.71%; the substrate has a great influence on the dust removal effect, the efficiency of photographic film substrate is the best, up to88.71%; the ratio of electrode width and spacing is2/3, dusting effect is best, up to88.3%. |
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