Title

A high contrast organic light emitting device employing an emissive organic phase tuning layer

Document Type

Conference Proceeding

Publisher

IEEE

Faculty

Faculty of Computing, Health and Science

School

Electron Science Research Institute

RAS ID

14815

Comments

This article was originally published as: Ding, B. , & Alameh, K. (2012). A high contrast organic light emitting device employing an emissive organic phase tuning layer. Proceedings of International Conference on High Capacity Optical Networks and Enabling Technologies (HONET). (pp. 162-166). Turkey, Istanbul. IEEE. Original article available here

Abstract

A high contrast-ratio organic light emitting device (OLED) with an emissive phase tuning layer is proposed and experimentally demonstrated. The OLED is implemented by stacking two organic phase tuning layers between composite metal layers of LiF/Al/C60 and LiF/Al and optimizing their thicknesses. Electroluminescence spectrum reveals that the phase tuning layer emits light due to the insertion of ultra-thin C60. Such a tandem device can reduce the operating voltage by 1.1 V, in comparison to conventional high contrast OLEDs. Measured reflection spectra validate the high-contrast capability of the OLED, and demonstrate experimentally an average reflectivity of 6.0% in the visible range from 400 nm to 750 nm, which is much lower than 20.3% for conventional high contrast OLED.

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