27 August 2003 Nanowire array electrode structure for organic light-emitting diodes.
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Abstract
Organic light emitting diodes were fabricated using a novel electrode structure. The anode structure comprised of a metallic nanowire array and was fabricated by electroplating porous aluminium oxide with copper. These devices were compared with devices with a conventional planar anode structure. The light emitting polymer Poly[(4-methylphenyl) imino-4,4'-diphenylene-(4-methylphenyl)imino-1,4-phenylene-ethenylene-2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene-ethenylene-1,4-phenylene)] was used as the emissive material in single layer devices of structure Cu: TPD(4M)-MEH-PPV: Al, where the aluminium was negatively biased with respect to the copper. The DC current-voltage characteristics of both device types are presented. The electroluminescence spectra are also presented. We found that due to the reduction in active area in the nanowire device from that of the planar device the current density reached in the nanowire array anode device exceeded that in the planar anode device by a factor of eight. Similarly a relative increase in the electroluminescence intensity was also observed.
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Adam E. Strevens, Adam E. Strevens, Stephen M. Lipson, Stephen M. Lipson, Anna Drury, Anna Drury, Michael Kroell, Michael Kroell, Hans-Heinrich Hoerhold, Hans-Heinrich Hoerhold, Werner J. Blau, Werner J. Blau, } "Nanowire array electrode structure for organic light-emitting diodes.", Proc. SPIE 4876, Opto-Ireland 2002: Optics and Photonics Technologies and Applications, (27 August 2003); doi: 10.1117/12.464213; https://doi.org/10.1117/12.464213
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