Idemitsu Kosan's Stacked Light-Emitting Layer Technology Receives Award at SID, the World's Largest Display Society

Idemitsu Kosan Co., Ltd. announced that its stacked light-emitting layer element technology, utilizing fluorescent blue materials, has received the 'Display Component of the Year Award' at the 2026 'Display Industry Awards' hosted by the Society for Information Display (SID).

The technology was recognized for its significant contribution to the display industry, not only through its research excellence but also for its successful commercialization and widespread real-world implementation.

This technology is a device design and implementation technique that achieves world-class luminous efficiency and extended lifespan in the OLED field. OLED displays adopting this technology can reduce power consumption by approximately 20% compared to conventional single-layer light-emitting OLED displays. This contributes to longer battery life for mobile devices like smartphones and enhances display power efficiency.

Having been selected as the best paper at 'Display Week' in 2022 and 2025, the technology had already received high acclaim during its research phase. Its recent recognition with the 'Display Component of the Year Award' reflects its progress into commercial products and social implementation.

Idemitsu will continue to contribute to higher performance and greater energy savings in OLED devices and displays through the development of OLED materials.

How OLEDs Emit Light OLEDs function by applying an electric current to organic materials, which temporarily enter a high-energy state (excitons) and emit light when returning to their original state. The layer where light is actually generated is called the 'light-emitting layer.' Combining this with multiple thin layers that adjust current flow creates an 'OLED element.'

About Stacked Light-Emitting Element Technology Stacked light-emitting layer elements represent a device design and implementation technique that reduces light loss by separating the regions where charge recombination and Triplet-Triplet Fusion (TTF) occur during the fluorescent element's light-emitting process, enabling both improved luminous efficiency and longer lifespan.

Performance Overview Method: Blue fluorescent OLED element using stacked light-emitting layers LT95: Over 200 hours (under drive conditions of 50 mA/cm2 current density) Luminous efficiency: 350 (Cd/A/CIE-y) (under drive conditions of 10 mA/cm2 current density) Chromaticity: (0.14, 0.042) (CIE1931 chromaticity coordinates)