New Hole Transporting Materials Based on Tetraphenylbenzene and Aromatic Amine Derivatives for OLEDs
作者:Seungho Kim、Sang-Ho Lee、Byeong-Kwan An、Se-Young Oh、Kwang-Yol Kay、Jongwook Park
DOI:10.1080/15421406.2013.849447
日期:2013.1
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-[14-(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 10mA/cm(2), respectively. Synthesized materials exhibited high T-g in the range of 118 to 133 degrees C. These values are higher than that of NPB which is commonly used as a hole transporting material.