Optischer Sender oder Verstaerker mit einer in Durchlassrichtung vorgespannten Halbleiterdiode

摘要

An electroluminescent device comprises a layer of N- or P-type semi-conductor phosphor material separated from a metal layer by an insulating layer, 100 rA thick, through which electrons tunnel to combine with holes in the phosphor to produce light. The electron density may be high enough to produce light by laser action in which case the sides of the device may be provided with light reflecting surfaces. The metal layer may consist of aluminium or gold, the insulating layer of aluminium oxide or silicon oxide and the phosphor layer of cadmium telluride, zinc telluride, cadmium sulphide or zinc sulphide. Electrodes are fixed to the outer surfaces of the metal and phosphor layers.