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Focus on Blue OLED at DisplayWeek
 
The interest in a high efficiency blue was so strong that 12 separate papers addressed the topic. In addition, there were several papers on TADF, which mentioned blue. By way of contrast, UDC said nothing. Below is a list of the papers of which #21.3 is a must read

  9.1      Stable Pure Blue Hyperfluorescence, Kyushu Univ
19.4    Ultralong-Life Deep-Blue OLED Device via Controlled Carrier Recombination State, SEL         
20.2    High-Efficiency, Long-Lifetime Deep Blue OLEDs, SAIRT, Samsung Electronics
20.3    Ultrahigh Performance of Blue FL OLEDs—w/250 cd/Ay efficiency, SEL
20.4    Nanostructured Diffraction Grating to Overcome Color Shift Tradeoff in Blue Strong Cavity Top Emitting OLEDs, 3M
21.3    Degradation Mechanism of PH Sensitized Blue TADF OLEDs, Samsung Display
26.1    Boron Based Deep Blue TADF materials, Kyung Hee University
26.2    Efficient and Stable Deep Blue OLEDs using TADF Sensitized Fluorescence, Tsinghua, University
27.1    Blue PH OLED for Future Displays, Samsung Display