MATERIALS AND METHODS FOR CONTROLLING PROPERTIES OF ORGANIC LIGHT-EMITTING DEVICE
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United States of America Patent
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Issued Date -
Dec 27, 2012
app pub date -
Dec 21, 2011
filing date -
Jun 21, 2011
priority date (Note) -
Abandoned
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Abstract
The present teachings provide methods for depositing and patterning organic light-emitting device (OLED) buffer layers. The method can use a thermal printing process and one or more additional processes, such as vacuum thermal evaporation (VTE), to create an OLED stack. OLED stack structures are also provided wherein which at least one of the charge injection or charge transport layers is formed by a thermal printing method at a high deposition rate. The organic layer can be subject to post-deposition treatment such as baking. The structure of the organic layer can be amorphous, crystalline, porous, dense, smooth, rough, or a combination thereof, depending on deposition parameters and post-treatment conditions. The organic layer can improve light out-coupling efficiency of an OLED, increase conductivity, decrease index of refraction, and/or modify the emission chromaticity of an OLED.
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