Flexible Organic Light-Emitting Diode Display 34 Towards the Realization of Ultra-Thin Large-Screen Televisions

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Flexible Organic Light-emitting Diode Display 34 Towards the realization of ultra-thin large-screen televisions

Outline

We are conducting research on thin, light ﬂ exible displays. We are demonstrating an 8-inch flexible display that uses highly efficient and long-lifetime organic light-emitting diodes (OLEDs)※1. We are also showing some of the key technologies that will be part of ultra-thin televisions in the future.

Features ●Materials for high-efﬁ ciency OLEDs We have developed a highly efﬁ cient light-emitting layer material based on a benzoquinoline derivative※2, and we have fabricated a red organic light-emitting diode device with low power consumption and a long lifetime.

●Oxide TFTs※3 suitable for large displays We have built an oxide TFT that uses soluble polymer ﬁ lms for the passivation layer, and other such parts. The TFT is very ﬂ exible and suitable for large-screen displays.

●Key technologies for large-screen ultra-thin displays We are using a new device structure to increase the lifetime of ﬂ exible organic light-emitting diode devices and electrode formation techniques that make use of printing methods.

In the works We will continue to improve the performance of TFTs and OLEDs in order to make larger displays with higher resolution, and we will continue to develop our fabrication techniques and materials so that we can make larger screens.

● The research on organic electroluminescent devices with a novel structure is being conducted in collaboration with Nippon Shokubai Co., Ltd. ● Part of this research is being conducted under the project titled "R&D on highly efficient and stable organic light-emitting device toward the realization of ultimate power-saving display" sponsored by the Ministry of Internal Affairs and Communications.

※1 OLED (Organic Light-emitting Diode): A device that emits light when a current ﬂ ows through it. ※2 Benzoquinoline derivatives: Organic materials with a molecular skeleton made of benzoquinoline. ※3 TFT: Thin ﬁ lm transistor.

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Cross-sectional view of a ﬂ exible OLED display