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Reflective Colored Organic Light-Emitting Diodes for Light-Adaptable Display
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- Authors
- Jong Tae Lim, Joon Tae Ahn, Jonghee Lee, Jaehyun Moon, Seong M. Cho, Chil Seong Ah, Seong Chu Lim, Jeong-Ik Lee
- Issue Date
- 2016-11
- Citation
- Journal of Nanoscience and Nanotechnology, v.16, no.11, pp.11843-11848
- ISSN
- 1533-4880
- Publisher
- American Scientific Publishers (ASP)
- Language
- English
- Type
- Journal Article
- Abstract
- 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-P챕rot 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.
- KSP Keywords
- Dark conditions, Dual-Mode, Multi-layered graphene, Optical shutter, Organic light-emitting diodes(OLEDS), Reflective mode, Semi-transparent, color reproduction, color-selective, light-emitting diode(LED), optical interference