Pure-blue OLEDs (IMAGE)
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
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