Enhancement on Top Emission of Organic Light-Emitting Diode via Scattering Surface Plasmons by Nano-Aggregated Outcoupling Layer

Zhijian Chen, Ziyao Wang, Lixin Xiao, Qihuang Gong
2009 Conference on Lasers and Electro-Optics/International Quantum Electronics Conference   unpublished
A stable self nano-aggregated bathocuproine (BCP) film was fabricated and introduced atop of a conventional organic light emitting diode (OLED) for enhancing top emission. It leads to a 2.7-2.1-fold enhancement on top emission at applied voltage from 4 to 9 V which is much larger than the 1.5-1.3-fold enhancement for a device overlaid with an amorphous BCP film. The more effective outcoupling of this method probably arises from surface plasmon (SP) modes being scattered by only the
more » ... d surface, and thus without phase cancellation, at the BCP/air boundary. Moreover, this method nearly preserves the original electroluminescent spectra and has no damage on electrical properties.
doi:10.1364/cleo.2009.cmh7 fatcat:hf4thyuclnbwdorgj5wg74w72a