Abstract

Polycrystal films were prepared by coating slurry on amorphous glass substrates and sintering in a nitrogen atmosphere in an attempt to produce films with properties suitable for fabricating all‐polycrystal heterojunction solar cells. The uniformity in microstructure and properties of these films has been correlated with starting particle size, volume percent of powder in the slurry, and sintering conditions. The variations of electrical properties as a function of sintering temperature, sintering period, and the amount of sintering aid added have been correlated with the variations in carrier concentration, grain size, and microstructure. Additional effect of heating rate is also considered. By optimizing the preparation conditions, it is possible to produce transparent films on amorphous glass substrates with an electron density in excess of 1018/cm3 and an electron mobility of 25 cm2/V‐s, The trap density of grain boundary is an order of for sintered films.

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