Title:
Stabilization of the work function of indium tin oxide using organic surface modifiers in organic light-emitting diodes

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Sharma, Asha
Kippelen, Bernard
Hotchkiss, Peter J.
Marder, Seth R.
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Abstract
We herein report on the performance and improved stability of organic light-emitting diodes (OLEDs) in which the transparent indium tin oxide (ITO) electrode is modified using organic surface modifiers based on phosphonic acid anchoring groups. In contrast to air plasma treatment, a commonly used technique to increase the work function of ITO, treatment of the ITO surface with a partially fluorinated phosphonic acid results in a comparable change in work function but with a higher stability over time. The resultant lifetime of OLEDs also increased when this phosphonic acid modified ITO was used.
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2008-10
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