Method for preparing NiO transparent conductive film by two steps

Abstract

The invention relates to a method for preparing a NiO transparent conductive film through two steps and belongs to the technical field of semiconductor optoelectronic material manufacture. The prior method adopts a complicated process for preparing a NiO ceramic target; and the NiO ceramic target is expensive and is easy to damage. In the process of preparing the NiO ceramic target by the prior method, the proportion of Ni atoms and O atoms is fixed so as to limit the adjusting range of the proportion of the Ni atoms and the O atoms in the prepared NiO transparent conductive film, thereby failing to meet difficult application requirements. Due to low-temperature growth, the film has more disadvantages, thereby causing the reduction of the mobility ratio of a current carrier in the film and greatly reducing the conductivity and the optical transmissivity of the NiO transparent conductive film. In step one of the method, a Ni film is prepared through sputtering the Ni target; and in step two, the obtained Ni film is positioned in an oxidation atmosphere, wherein the temperature is between 500 and 1,200 DEG C, the flow rate of oxygen gas is between 5 and 15 l / min, and time for thermal oxidization is between 30 and 180 minutes; and the Ni film is oxidized to form the NiO transparent conductive film.

Description

technical field [0001] The invention relates to a method for preparing a NiO transparent conductive film by magnetron sputtering, and belongs to the technical field of semiconductor optoelectronic material manufacturing. Background technique [0002] NiO transparent conductive film is a p-type, wide bandgap, transparent oxide semiconductor film material with transparent conductivity, electrochromic, gas detection, ultraviolet light detection and other properties, used in various flat-panel displays, solar cells, light-emitting diodes , in the ultraviolet light detector. The existing preparation method close to the present invention is the magnetron sputtering method, in which the sputtering target substance is sputtered onto the substrate by means of the magnetron sputtering to form a thin film. It is further divided into two types, one is to use NiO ceramic target as sputtering target, and use the plasma generated by argon glow discharge to sputter into film; the other is ...

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Problems solved by technology

As far as the second type is concerned, although the ratio of Ni atoms and O atoms in the prepared NiO transparent conductive film can be adjusted in a wide range by controlling the flow rate of the oxidizing gas and the sputtering power during sputtering, this kind of This method has the problem of poor crystallization quality of the film, which is caused by its low-temperature growth characteristics, that is to say, there are more defects in the film under low-temperature growth, which reduces the carrier mobility in the film and greatly reduces the transparency of NiO. Conductivity and Optical Transmittance of Conductive Films

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