Are there any library or exhibition halls where I can show students at school how the solar cells works?
Well, it is hard to say when there would be one talking about solar cells.
Why don't you arrange a tour to the solar cell library in downtown?
Sometimes there are some theme shows focused on solar cell technology in the National Science and technology Museum. You can take your students over there.
I chose to go to the library with my students, where they can learn a lot from the books.
There is a solar cell power generation station nearby the main road, where there is also a exhibition center showing the process of how the solar cell works. I guess that place is the best place for you to go.