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Improvement of Colour Gamut in Bottom-Emission Organic Light-Emitting Diodes Using Micro-Cavity Structure Embedded Cathodes

1
Flexible Device Research Group, Electronics and Telecommunications Research Institute, Daejeon 34129, Korea
2
Department of Creative Convergence Engineering, Hanbat National University, 125 Dongseo-daero, Yuseong-gu, Daejeon 34158, Korea
3
Reality Device Research Division, Electronics and Telecommunications Research Institute, Daejeon 34129, Korea
*
Author to whom correspondence should be addressed.
Electronics 2018, 7(9), 155; https://doi.org/10.3390/electronics7090155
Received: 27 July 2018 / Revised: 13 August 2018 / Accepted: 19 August 2018 / Published: 21 August 2018
(This article belongs to the Special Issue Organic Light Emitting Diodes - OLEDs)
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Abstract

We demonstrate an approach for improving the colour gamut of bottom-emission organic light-emitting diodes (OLEDs) through micro-cavity structure embedded cathodes. The devices with micro-cavity structure embedded cathodes showed an improved colour gamut of 91.5% (National Television System Committee (NTSC)), 95.8% (Adobe RGB), and 129.2% (sRGB), compared to those of the devices without micro-cavity structure embedded cathodes—59.2% (NTSC), 62.0% (Adobe RGB), 83.6% (sRGB). In addition, the performance of red, green, and blue devices are also investigated depending on the optical length of the micro-cavity structure. View Full-Text
Keywords: OLED; colour gamut; micro-cavity; bottom-emission OLED; colour gamut; micro-cavity; bottom-emission
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Lee, H.; Lee, J.; Lee, J.-I.; Cho, N.S. Improvement of Colour Gamut in Bottom-Emission Organic Light-Emitting Diodes Using Micro-Cavity Structure Embedded Cathodes. Electronics 2018, 7, 155.

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