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Molecular Ordering of Vacuum‐Deposited 4,4′,4″ ‐ tris(N ‐ (1 ‐ naphthyl) ‐ N ‐ phenylamino) triphenylamine Thin Films
Author(s) -
Oh Sung,
Cho YoungRae,
Choe Youngson,
Park DaeWon
Publication year - 2007
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200750302
Subject(s) - materials science , thin film , triphenylamine , indium tin oxide , annealing (glass) , raman spectroscopy , stacking , amorphous solid , analytical chemistry (journal) , crystallography , nanotechnology , optics , chemistry , optoelectronics , organic chemistry , composite material , physics
A thin film of vacuum deposited 1‐TNATA(4,4′,4″‐tris(N‐(1‐naphthyl)‐ N‐phenylamino)triphenylamine) is placed between indium tin oxide (ITO) electrode and a hole transporting layer (HTL) in OLEDs. The molecular ordering of 1‐TNATA thin film is obtained by thermal annealing and electromagnetic field. As‐deposited 1‐TNATA thin films were not molecularly ordered according to Raman spectra results. Thermal annealing after deposition lead to closer stacking of 1‐TNATA molecules and made the 1‐TNATA film well‐ordered. While thermal annealing at 110 °C, the average surface roughness decreased from 10.2 to 7.2 nm.