material that was used in the crystal radio was often a
composition of different types of elements. One example was
galena, which consists of lead and sulfide.
compositions are used as semiconductors, but mostly the
pure elements silicon (Si) and sometimes germanium (Ge) are
being used. These semiconducting elements are located in
group 14 of the periodic table.
To cite this page MLA style: "The Transistor". Nobelprize.org. Nobel Media AB 2014. Web. 9 Oct 2015. <http://www.nobelprize.org/educational/physics/transistor/function/semiconductor_2.html>