today i want to share how to make a solar cell at home easily and it is fun to make.but firstly i want to tell you dont expect to light your house with these solar cells because it produces small voltage and may need acres of them to power the house!but yet it is easy and need ordinary stuff .but little caution is needed to handle and make the cell.it is great for science classes and projects
visit my profile:http://www.instructables.com/member/argha+halder/
to see some more of such interesting projects.
Step 1: Things needed:
the things you will need:
1)gas or electric stove
2)copper plate or flashers -2
3)a transparent plastic or glass container
the tools you will need:
1)voltmetre(just for testing)
Step 2: Making the semi conductor layer part-1
every solar cell has a semi conductor plate and our cell contains one which is cuprous oxide that is made by burning or heating copper,why it is necessary is given in the step "how does it work".so first take one of the two copper plates and hold it with a pliers.now turn on the stove and put the copper on the fire.the colour of the copper would start to become mixed like orange red and many other colour in one copper.heat it in that state for 20 minutes.
be extremely careful not to burn your hand and dont touch or dip the copper in water while its hot.
Step 3: Making the semi conductor part-2
now take the heated copper and put aside on a dry place to cool.after some time you will see some black flakes is starting to pop and break and flying away.the skin will start to appear.now when it fully cools down the flakes will fall from the full copper plate and the copper will take reddish brown colour.now using hand or sand paper remove the flakes from the copper surface.
now take the transparent plastic container and pour some water in it.now take some salt and keep dissolving until any more salt does not get dissolved.