Visible Light from Semiconductors

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Science  29 Mar 1968:
Vol. 159, Issue 3822, pp. 1419-1423
DOI: 10.1126/science.159.3822.1419


Electroluminescence from semiconductor diode light sources can occur as a result of the application of a direct current at a low voltage to a suitably doped crystal containing a p-n junction. In recent years, it has become apparent that in some materials the efficiency of conversion of electric energy to visible light can be appreciably high. Since light-emitting diodes are compatible with the present electronic circuitry, they have many potential applications.