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Dibenzobarrelene‐Based Azaacenes: Emitters in Organic Light‐Emitting Diodes
Author(s) -
Ganschow Michael,
Koser Silke,
Hahn Sebastian,
Rominger Frank,
Freudenberg Jan,
Bunz Uwe H. F.
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201605820
Subject(s) - oled , luminance , materials science , fluorescence , amorphous solid , solid state , diode , optoelectronics , cyclic voltammetry , thin film , light emitting diode , photochemistry , nanotechnology , optics , chemistry , electrode , electrochemistry , crystallography , physics , layer (electronics)
The synthesis of soluble dibenzobarrelene‐substituted azaacenes either by condensation reactions in solution or, more effectively, in the solid state by using a ball mill is reported herein. We relate their optical properties in thin films to their packing in the solid state. The targets are characterized by cyclic voltammetry, X‐ray crystallography and UV/Vis and fluorescence analysis. Three highly fluorescent, amorphous azaacenes were processed into organic light‐emitting diodes, and their improved performance (luminance, efficiency and efficacy) was compared with that of structurally related iptycene‐based azaacenes.