Pure-blue OLEDs (IMAGE)

Kyushu University

Pure-blue OLEDs

Caption

Organic light-emitting diodes (OLEDs) developed by researchers at Kyushu University in Japan emit blue light with a narrow emission spectrum and high efficiency. The molecule HDT-1 rapidly converts non-emitting triplets into singlets and transfers the energy to ν-DABNA for pure-blue emission. Operational lifetimes significantly longer than those reported to date for highly efficient pure-blue OLEDs indicate the potential for this approach based on hyperfluorescence to overcome issues remaining for blue OLEDs used in displays. Use of a tandem structure that basically stacks two devices on top of each other further improved color purity and lifetime.

Credit

OPERA, Kyushu University

Usage Restrictions

Only for media and non-commercial use.

License

Licensed content

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.