PV Based Silicon Cells

Pvtypes based on Si types Crystal structure on atomic arrangement in a material plays crucial role in its electrical props. 1 Single In ts cryptalline Crystal Si: form, a material is atoms characterized This an array is repetitive with displacement by ordered array of component 15 -18% efficient, typically expensive to thru material sample - make (grown, as by crystal Poly -Cryptalline : Object composed of and of sub-secs, These each subsections of however are independently which is crystalline in form the atami order Cy regularity undergo oriented so that at their interfaces 12-16% efficient slowly improving Cy sharp discontinuities. cheaper to make (cast in ingists) Amerphous Displays no atomic regularity scale. of arrangement on any macroscopic 4-8% efficient cy cheapest per Watt. called as"thin film" by pasily deposited on a wide range of surface types

N P + depetion voth chyer - -free is + + +ve donor in PD across A -ve acceptor ion junction + holes curved ) - Toxic Cd,As used. minor impacts cy can be controlled Disadvantages through recycling proper disposal. More expensive to produce than conventional sources lifet to heat of energy due to cost of manu PV devices. Variable energy source. Fragile Cy can be damaged easily.