Yamagata University and FLASK succeeded in development of long-lifetime next-generation organic LEDs at high-brightness


The research group of Prof. Junji Kido, Frontier Center for Organic Materials, Yamagata University (YU) and Dr. Takuya Komoda, FLASK Corporation (FLASK) has succeeded in developing stable organic light-emitting diodes (organic LEDs or OLEDs) at high brightness using 3rd-generation thermally activated delayed fluorescence (TADF) material. At the brightness of 1,000 cd/m2 for practical applications, half operational lifetime of about 10,000 hours, driving voltage of 4.15V, power efficiency of 54.3 lm/W and external guantum efficiency (EQE) of 21.6% have been achieved. The new organic LED shows approximately 1.5 times or more EQE as compared with that of previously reported while lifetime reaches 4 times longer.



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