Synthesis and hole-transporting properties of various bicarbazyl derivatives.
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.
Lee
Yoon-Mi
YM
Department of Chemistry, The Catholic University of Korea, Bucheon 420-743, Republic of Korea.
Kim
Soo-Kang
SK
Lee
Chang-Jun
CJ
Lee
Ji-Hoon
JH
Park
Jong-Wook
JW