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Reflective Colored Organic Light-Emitting Diodes for Light-Adaptable Display

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A new light-adaptable display (LAD), consisting of reflective, colored, organic light-emitting diodes (RCOLEDs) and an optical shutter (OS), was fabricated. The RCOLED is composed of a color-selective reflective filter (CSRF) functioning in reflective mode under bright conditions, and a transparent OLED (TOLED) working in emissive mode under relatively dark conditions. The OS functions to pass or shield the light generated in the TOLED or from the outer environment. In this RCOLED, the CSRF was designed based on the concept of Fabry-Pérot interferometry to represent a specific color of red, blue, and green. The TOLED was designed using a low-reflective multi-layered graphene as an top electrode to suppress the distorted optical interference from reflective mirrors in the RCOLED. The color reproduction range calculated from RCOLEDs with a graphene top electrode was dramatically improved (35.0%), compared to that computed from RCOLEDs with a semi-transparent thin-silver top electrode (2.4%). Finally, we demonstrate that the new dual-mode LAD works well.

Keywords: Color-Selective Reflective Filter; Light-Adaptable Display; Low Reflective Electrode; Multi-Layered Graphene; Reflective Colored Organic Light-Emitting Diode; Transparent Organic Light-Emitting Diode

Document Type: Research Article

Affiliations: 1: Flexible Information Device Research Section, Electronics and Telecommunications Research Institute, Daejeon 305-700, Republic of Korea 2: Photonics/Wireless Convergence Platform Research Section, Electronics and Telecommunications Research Institute, Daejeon 305-700, Republic of Korea 3: Reality Display Device Research Section, Electronics and Telecommunications Research Institute, Daejeon 305-700, Republic of Korea 4: Center for Integrated Nanostructure Physics, Institute for Basic Science, Sungkyunkwan University, Suwon, 440-746, Republic Korea

Publication date: November 1, 2016

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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