In order to manufacture a solar PV panel, 19 mineral products and metals are utilized. Out of these, eight metals face supply challenges owing to a lack of supply diversity, the complex nature of economies caused by co-production and geopolitical risks. These metal requirements differ widely based on the type of solar PV technologies. The elemental requirements of the specific solar technology are given below: Crystalline silicon (c-Si) - Ag, Ni, Al, Cu and Fe Amorphous silicon (a-Si) - Ni, Cr, Ge, Mo, Al, Cu and Fe Cadmium Telluride (CdTe) – Ni, Cr, Mo, Cd, Al, Te, Cu and Fe Copper indium gallium selenide (CIGS) – Ni, Cr, Mo, Al, Cu, In, Fe, Ga and Se
Depending on the solar PV technology, there are a number of different element/metal(s) which in turn are derived from a diverse set of ore bodies. Out of the 15 to 20 ores that cater to a range of industrial applications, there are 8 ore bodies which supply the elemental needs of solar PV technologies. These ore bodies are gold ore, nickel ore, chromium ore, molybdenum ore, zinc ore, copper ore, aluminum ore and Iron ore.
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A key feature of renewables is the usage of rare earth metals. These metals are critical to the renewable energy technology manufacturing value chain. The name “rare earth” is a consequence of seeming scarcity in 18th century in an ore first discovered near Ytterby, Sweden. However it is the availability of economically extractable concentrations that makes them rare.