Application of indium nanowires to donor–acceptor pair luminescence

A novel, self-supported nanostructured powder electroluminescence (EL) device, consisting of a dilute layer of conductive nanowires, which directly contacts a ZnS phosphor layer and functions as rear electrodes, is reported in this paper. Indium nanowires fabricated by using a porous alumina template and hydraulic pressure injection technique induce a localized field in the phosphor that is much higher than the average applied field and hence excite the phosphor to luminesce. The mechanism for light generation from the nanostructured contact EL device can be understood from the bipolar field-emission model.