Effects of paste composition and heat-treatment conditions on the microstructure of polycrystalline CdS1-x Se x films

We have studied the effects of flux content, synthesis procedure, and grinding conditions of CdS1-x Se x powders for paste preparation on the composition and microstructure of films produced by screen printing. The results demonstrate that, to obtain single-phase polycrystalline CdS1-x Se x films with well-formed grain boundaries, the flux content of the paste must lie in the range 10-12 wt %, and the solid solution with necessary doping impurities should be presynthesized. The powder must be ground to a particle size no greater than 6 mum.