Molecular Crystals and Liquid Crystals p. 69 - 77 (2013)
Update date:2022-08-03
Topics:
Kim, Seungho
Lee, Sang-Ho
An, Byeong-Kwan
Oh, Se-Young
Kay, Kwang-Yol
Park, Jongwook
Three different new hole transport compounds, namely,2-[1-{4-(N,N- diphenylamino) phenyl}-3,4,5,6-tetraphenylbenzene-2-yl]5-N,N- diphenylaminopyridine(DPAP-TB), 2-[1-{4-(N-phenylnaphthalene-1-amino)phenyl}-3, 4,5,6-tetraphenylbenzene-2-yl]5-(N-phenylnaphthalen-1-amino)pyridine(1-PNAP-TB) and 2-[1{4-(N-phenylnaphthal-en-1-amino)phenyl}-3,4-,5,6-tetraphenylbenzene-2- yl]-5-(N-phenylnaphthalen-2-amino)pyridine(2-PNAP-TB) were synthesized. Optical and electronic properties were examined by UV-Visible absorption spectrum and cyclic voltammetry. Luminance efficiencies and external quantum efficiencies of DPAP-TB, 1-PNAP-TB and 2-PNAP-TB were 3.72, 2.82, 3.30 cd/A, and 1.29, 0.97, 1.12% at 10 mA/cm2, respectively. Synthesized materials exhibited high Tg in the range of 118 to 133°C. These values are higher than that of NPB which is commonly used as a hole transporting material.
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