Tsinghua University

Sudhir Kumar

Jwo-Huei Jou

Justin Thomas Koil Pitchai Rajapandian

The present invention demonstrates a newly designed and synthesized carbazole scaffold based electro-fluorescent emitter, 9-butyl-2,7-(2-(4-methoxyphenyl)ethynyl)-9H-carbazole (Cz(APhOMe)), for ultra-violet OLED. This novel emitter has showed a high quantum yield of &#x2dc;78%. By doping in a host light-emitting layer of an OLED, the Cz(APhOMe)guest light-emitting material shows a UV light belong to the near-UV region with high external quantum efficiency. Most importantly, a variety of experiment results have proved that this UV light is a pure UV light having only one peak wavelength in the emission spectrum thereof. Ascertainably, this pure UV light can be applied in numerous applications, such as biological sensors chemical sensors, leakage detection in automobiles, crack detection in airplanes, high density information storage devices, water treatment for germicidal protection, forensic investigations, sanitation and sterilization, laboratory researches, food industries, and fraud detection.

Electro-fluorescent emitter for ultra-violet OLED

The present invention provides a novel light-emitting material, which is a blue fluorescent material performs a high quantum yield of &#x2dc;86%, and can be doped into a host light-emitting layer of an organic light emitting diode (OLED) for being a guest light-emitting material, so as to increase the external quantum efficiency, the power efficiency and the current efficiency of the OLED. Most importantly, a variety of experiment results have proved that the OLED having the novel light-emitting material can emit a deep blue light with CIE coordinates of (0.156, 0.055). Moreover, the experiment results also proved that the novel light-emitting material can be applied in fabricating OLED through dry process and/or wet process; so that, the novel light-emitting material is helpful to the low-cost mass production of OLEDs.

Growing community of inventors

Hsinchu, Taiwan

Sudhir Kumar