Table 2: Chemical analysis (at.%) of the Cu-In-Ga-Se powder mechanically alloyed under different processing conditions.

BPRSpeed (rpm)Time (min)CuInGaSe

20:130012032.6115.236.5345.62

20:130024031.7315.636.7145.93

10:11504025.9816.987.2549.78

Targeted ( )24.4317.637.5650.38