TY - JOUR T1 - Improving the surface characteristics of transparent electrode of Organic Light Emitting Diode by ion bombardment and alumina micro powder bombardment methods TT - بهبود ویژگی های سطحی الکترود شفاف دیودهای نورگسیل آلی به دو روش بمباران یونی و بمباران با میکروپودر آلومینا JF - opsi JO - opsi VL - 23 IS - 0 UR - http://opsi.ir/article-1-1222-en.html Y1 - 2017 SP - 373 EP - 376 KW - Organic light emitting diodes KW - transparent electrodes KW - organic semiconductor KW - substrate roughness N2 - Abstract. One of the important challenges in fabricating of organic semiconductor devices is providing a suitable substrate. In this research providing of a transparent electrode as a substrate for OLED fabrication is investigated. So we deposit a film of ITO on the glass substrate and improve it by ion bombardment and alumina micro powder bombardment surface treatment methods. The electrode transmittance spectrum in visible range, is measured by double beam spectrometer. Also the surface resistance is measured by four point probes system. The quality of substrate surface is investigated by AFM microscopy. Investigations show that the roughness and pick to valley parameters extremely improved after surface treatment process. After this investigations, we use these substrates to fabricating OLEDs to show the efficiency of these methods practically by measuring voltage-current characteristic. M3 ER -