Abstract
This paper reports a new HTL material that has high glass-transition temperatures (Tg) and excellent thermal properties. The synthesized material was N,N-diethyl-3,3'-bicarbazyl (DEBC), N,N-diphenyl-3,3'-bicarbazyl (DPBC) and N,N-dinaphthyl-3,3'-bicarbazyl (DNBC). The device that used DPBC as HTL showed the highest efficiency of 4.95 cd/A and 2.22 lm/W at 10 mA/cm2. This is an improvement by more than 10% from the luminance efficiency of NPB, a commercialized material.
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