PV solar panel(module) from silicon wafer

Normally PV solar cell can be classify two kind according to substrate of PV solar cell
first is silicon crystalline base PV cell second is non silicon crystalline PV cell
silicon crystalline base PV cell cell one more classify two kind mono crystalline or multi crystalline mono crystalline wafer is make from mono crystalline ingot by slice

multi crystalline wafer is make from multi crystalline ingot by slice

you can see what is difference on surface between mono & multi
this mono or multi crystalline silicon wafer is use for substrate for PV solar cell by screen printing and other extra process