An Enhanced Operational Stability of Organic Light Emitting Devices with Polymeric Buffer Layer
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概要
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A uniform and robust polymer-based hole injection layer (HIL) was formed by spin-casting process in an ambient air condition. The rough surface of indium tin oxide (ITO) was covered by this polymer-based HIL which plays an important role as a buffer layer. The utilization of this buffered HIL polymer resulted in an enhanced long-term stability of organic light emitting devices (OLEDs). In addition, we found that the precise control of hole current flow is possible by doping of 9,10-dicyanoanthracene (DCA) with moderate electron affinity ({\sim}3.5 eV) plausibly due to a strong dipole interaction with the polymeric HIL material. As a result, a new buffer layer doped with DCA showed a substantially controlled hole injection into an emitting layer (EML) which causes a much more enhanced lifetime of the blue OLED by a factor of 4.3.
- 2012-04-25
著者
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Suh Min
Department Of Ophthalmology Seoul National University College Of Medicine
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Cho Sang
Department of Information Display, Kyung Hee University, Seoul 130-701, Republic of Korea
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Suh Min
Department of Information Display, Kyung Hee University, Seoul 130-701, Republic of Korea
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CHO Sang
Department of Dermatology, College of Medicine, The Catholic University of Korea
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