
Polymer solar cells or 'plastic solar cells' are made from organic molecules and are basically semiconducting material. Although these thin-film solar cells have high efficiency and stability, the abundance of gallium and indium in the crust is low and cadmium is toxic. They are similar to silicon-based solar cells. Polymer is typical thin-film solar cells include the gallium arsenide, copper indium gallium selenide, cadmium telluride, etc.