What are the properties of Solar Panels?

Properties of solar panel?
I know this is too general,but i am to write a report on the materials used to make solar panels,and i am to include the physical, mechanical ,and chemical properties of the materials.
It’s just too general,such that i am lost.There are so many types of solar panels.So i hope some experts on this subject can give me a general guide lines ,maybe the tensile strength ?
as much as you can please.
Why would i ask when i can find the answers on wikipedia???