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Modest Beginnings—Yellow TADF in WiseChip's PMOLED
April 15, 2019
 
Japanese TADF developer Kyuluxreported reaching a milestones for their blue Hyper-fluorescent TADF (Thermally Activated Delayed Fluorescence).  The current specs are for a 470nm blue material that has a lifetime of 200 hours and an EQE (External quantum efficiency), which means the material can generate a blue color that will degrade by 5% over 200 hours starting at 750 nits with an external efficiency of 22%.  The color is below the standard of 460nm and getting down 10nm has proven problematic for all emitter makers.  Kyulux competes with Cynora and phosphorescent emitter materials produced by Universal Display, which continues to say they are “making good progress”. 
 
In June 2018 Kyulux and WiseChip unveiled a prototype flexible PMOLED display that used Kyulux’s Hyperfluorescence yellow emitter. Kyulux recently stated that WiseChip has finished developing the panel and is now ready to start producing and selling the panel.

Figure 1: Hyperfluorescent Blue TADF Specs 

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Source: Company
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Figure 2:World’s First Hyperfluorescent PMOLED Display
Source: Company
The WiseChip panel is 73.00 x 41.86 mm (2.7") with a resolution of 128x64. and the power consumption of its display is almost half of its regular fluorescent yellow PMOLED. From: OLED-info
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