IONIC LIQUIED FOR LEC

ホーム > HOME > Research and Development > Introduction on technology > IONIC LIQUIED FOR LEC

IONIC LIQUIED for high-luminace LEC

Highest luminance in the world for light-emitting electrochemical cell (LEC)
(at least 19,000 cd/m2)※As of September 2014

What is LEC?

・This is a new method of light emission developed by Alan J. Heeger and colleagues in 1995.

・The structure consists of light-emission layer, made of light-emitting material (polymer) and electrolyte, placed between the electrodes, resulting in plane emission device similar to organic EL.

・The structure and manufacturing method are simpler than other light-emitting devices and is noted as a next-generation emission device.

  • Structure of OLED

    Structure of OLED

  • Structure of LEC

    Structure of LEC

  • Comparison of characteristics between LEC device and OLED device

    Comparison of characteristics between LEC device and OLED device

Succeeded in development of electrolyte for high-luminance LEC

As a result of joint research with Waseda University*, we developed an electrolyte for high luminance LEC by using our technology for phosphonium ionic liquid.

*Associate Professor Tomo Sakanoue (leading figure in Japan for researches on LEC)

Nippon Chemical's ionic liquid for high luminance LEC can be supplied in a stable manner and at low cost if synthesized from high-purity phosphine gas.
We have a wide range of products with phosphonium products as the main feature.
High transparency of phosphonium is optimal for use in optics.

  • Example of operating blue LEC device from trial manufacture

    Example of operating blue LEC device from trial manufacture

  • Example of operating serial LEC device from trial manufacture

    Example of operating serial LEC device from trial manufacture

  • Structural diagram of serial LED device from trial manufacture

    Structural diagram of serial LED device from trial manufacture

Advantage of IONIC LIQUID for LEC

(1)Satisfactory mixing property with various light-emitting polymer
(2)Low emission starting voltage
(3)High luminance and long lifespan

High performance is demonstrated in various light-emitting polymers, including fluorine and polyparaphenylene vinylene polymers.
We are developing paint for the formation of LEC light-emitting layers to create new and innovative devices.

IONIC LIQUID FOR LEC

IONIC LIQUID FOR LEC

Please contact us for inquiries about Research and Development