How do I build a good solar cell?

Question

I just built my first solar cell using cuprous oxide as my semiconductor. Since this one isnt even powerful enough to light an LED, how do I make a better one. BTW my supplies consist of anything that can be found at a local hardware store or in the home, and I dont really want to spend more than $50 (US)

Answer 1

I would say you are out of luck with your limits.  Silicon semiconductor solar cells produce about 1/2 a volt each, so you need 3 to make the volt and a half needed to light an LED.   And to make silicon you have to use some high temp purification processes - unless you are going to buy the thin fragile wafers and work with them.