▎ 摘　　要

NOVELTY - The method for preparing fluorine doped tin oxide (FTO)-coated glass composite film with micro-nano cluster surface morphology involves (a) ultrasonically dispersing graphene material in a mixed acid of concentrated nitric acid and concentrated sulfuric acid, diluting the dispersion with deionized water, centrifuging, filtering, drying to obtain acidified graphene, mixing acidified graphene and polyvinylpyrrolidone, adding ethanol, fully grinding and homogenizing in an agate mortar to obtain polyvinylpyrrolidone-modified acidified graphene, (b) mixing organotin, ammonium fluoride, hydrochloric acid, methanol and water to obtain FTO precursor liquid, (c) adding polyvinylpyrrolidone-modified acidified graphene to FTO precursor liquid, ultrasonically treating and magnetically stirring, and (d) adding the FTO-coated glass composite precursor liquid to an atomization cup, opening a switch of the air compressor and allowing the compressed air to pass through air inlet of atomization cup. USE - Method is useful for preparing FTO-coated glass composite film with micro-nano cluster surface morphology, where the composite film is useful in a solar cell. ADVANTAGE - The method ensures simple and economical preparation of the composite film with excellent light-scattering ability. The composite film improves photoelectric conversion efficiency of the solar cell. DETAILED DESCRIPTION - The method for preparing fluorine doped tin oxide (FTO)-coated glass composite film with micro-nano cluster surface morphology involves (a) ultrasonically dispersing graphene material in a mixed acid of concentrated nitric acid and concentrated sulfuric acid at a volume ratio of 3:1, diluting the dispersion with deionized water, centrifuging, filtering, drying at 60 degrees C to obtain acidified graphene, mixing acidified graphene and polyvinylpyrrolidone at a mass ratio of 20:3-6, adding 0.042-0.154 ml 99.7% ethanol, fully grinding and homogenizing in an agate mortar to obtain polyvinylpyrrolidone-modified acidified graphene, (b) mixing organotin, ammonium fluoride, hydrochloric acid, methanol and water in a molar ratio of 0.266-0.477:0.766-1.565:37.87:14.15 under magnetic stirring condition for 4-6 hours to obtain FTO precursor liquid, (c) adding 0.13-10.8 mg polyvinylpyrrolidone-modified acidified graphene to FTO precursor liquid, ultrasonically treating for 1 hour and magnetically stirring for 24-48 hours, and (d) adding the FTO-coated glass composite precursor liquid to an atomization cup, opening a switch of the air compressor, allowing the compressed air to pass through the air inlet of the atomization cup at high speed, atomizing the precursor liquid, strucking the atomized precursor liquid along the glass pipe to the high temperature glass substrate under the pipe outlet, pressing the spray head to atomize the precursor liquid onto the glass substrate at 470-530 degrees C, finally depositing on a surface of the glass and naturally cooling to obtain composite film.