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Electroluminescence from carbazole dimers
Author(s) -
Romero Danilo B.,
Nüesch Frank,
Benazzi Tayeb,
Adès Didier,
Siove Alain,
Zuppiroli Libero
Publication year - 1997
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.19970091506
Subject(s) - materials science , electroluminescence , carbazole , optoelectronics , luminescence , sublimation (psychology) , indium tin oxide , light emitting diode , fabrication , photochemistry , layer (electronics) , nanotechnology , medicine , psychology , chemistry , alternative medicine , pathology , psychotherapist
Blue light‐emission from a single‐layer organic LED (light‐emitting diode) based on carbazole dimers is reported. The device fabrication, involving vacuum sublimation of the dimer onto an indium tin oxide covered glass substrate, is described and the source of the electroluminescence elucidated. It is deduced that confined intra‐dimer luminescence excitations and a balanced double‐charge injection result in a device with good luminance and modest external quantum efficiencies. Of the three primary colors required for full‐color display applications, blue has been the most elusive to obtain.