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Efficiency and Aging Comparison Between N,N′‐Bis (3‐methylphenyl)‐N,N′‐diphenylbenzidine (TPD) and N,N′‐Di‐[(1‐naphthalenyl)‐N,N′‐diphenyl]‐1,1′‐biphenyl‐4,4′‐diamine (NPD) Based OLED Devices
Author(s) -
Maglione Maria Grazia,
Minarini Carla,
Miscioscia Riccardo,
Nenna Giuseppe,
Romanelli Emma,
Tassini Paolo
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.200750135
Subject(s) - oled , materials science , brightness , biphenyl , diamine , optoelectronics , composite material , polymer chemistry , optics , chemistry , physics , organic chemistry , layer (electronics)
In this paper we present and discuss experimental results to evaluate performances and aging behaviour of two Hole Transporting Material (HTM), TPD and NPD, in Organic Light Emitting Device (OLED) with structure: ITO/HTM/Alq3/Al. For each of these HTMs, devices with several thicknesses have been built, to measure and emphasize behaviours of material‐geometry combinations. Electro‐optical properties have been measured to estimate and compare brightness, power efficiency and aging decays.