Chemists have found a cheaper way to light up smartphone and TV screens -- using copper rather than iridium -- which could save manufacturers and consumers money without affecting visual quality. Iridium is one of the rarest elements on Earth, its origins possibly a millions-year-old asteroid; copper, on the other hand, is a plentiful metal worldwide. Therefore, substituting copper for iridium could help solve a major supply problem.
Credit: National Science Foundation/Karson Productions
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