Abstract
The effect of sulfur vapor pressure in preparing the FeS 2 films has been discussed and some incongruous views about sulfur pressure have been clarified in this paper based on experimental results and theoretical analysis. It is shown that lower sulfur pressures than the saturation value only result in poorer crystallization and worse performances, and in other words the FeS 2 films could be optimized through improving the sulfur pressure till the saturation point. However for a certain temperature the sulfur pressure is limited by its saturated vapor pressure, and further increase of the sulfur quantity reacted with Fe films has little influence on the structure and properties of the pyrite films.
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