one question about solar cells (1 Viewer)

[richz]

Hello,

ive always known for solar cells, the n type semiconductor is at the top and it is exposed to light and the p type one is at the botom. But once i saw the 04 hsc paper the p type was at the top. How does that work then??

thnx

 

[acullen]

The p-type being on top is correct (I can't remember that question in the 2004 HSC).

To quote the Tipler uni physics textbook... "When incident light strikes the p-type region, electron-hole pairs are created, resulting in a current through the load resistance [ie the external circuit]."