A contribution to development of polymeric displays by ink jet technique. / Uma contribuição ao desenvolvimento de displays poliméricos com a técnica Ink Jet.

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Organic Light Emitters Diodes OLEDs is a promising field of study and a huge market opportunity to semiconductor players. Thanks to its potential characteristics to replace the main todays display technologies like lightweight, low voltage, wide viewing angle, high resolution, fast switching, broad color range and the possibility to fabricate flexible devices, makes the organic semiconductors a potential candidate to develop, in a near future, devices and systems that even could not be imagined before. This work aims to contribute to the manufacturing process field and to the characterization of displays made by ink jet deposition technique. To achieve this objective, line x column patterns were produced, in which the pixels are generated at the crossing of lines and columns. The ink jet printing of materials is playing an important role in industry because it provides a low-cost manufacture environment potential. In this work, we studied the morphology of the ink jet deposition of polyfluorene over Indium Tin Oxide (ITO) substrates treated by different procedures. Those materials where used because the polyfluorene polymer presents high light emission efficiency and easiness of processing. The electrodes were prepared with ITO (due its low resistivity, high work function and high transmittance in the visible spectrum) and aluminum. The processed displays were sealed inside an inert ambient with positive pressure to avoid the photo-oxidation of the semiconductor luminescent polymer layers. The devices were characterized by optical (photoluminescence), electrical (electroluminescence) and performance (brightness, luminous efficiency) measurements.

ASSUNTO(S)

displays microeletrônica polymers ink jet ink jet displays oled oled pled nanotechnology nanotecnologia eletrônica molecular pled

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