TY  - JOUR
A1  - Brust, Felix
A1  - Nagler, Oliver
A1  - Shoyama, Kazutaka
A1  - Stolte, Matthias
A1  - Würthner, Frank
T1  - Organic Light‐Emitting Diodes Based on Silandiol‐Bay‐Bridged Perylene Bisimides
JF  - Advanced Optical Materials
N2  - Perylene bisimides (PBIs) are among the best fluorophores but have to be enwrapped for optoelectronic applications by large and heavy substituents to prevent their ππ‐stacking, which is known to accelerate non‐radiative decay processes in the solid state. Here, light‐weight di‐tert‐butylsilyl groups are introduced to bridge 1,12‐dihydroxy and 1,6,7,12‐tetrahydroxy PBIs to afford sublimable dyes for vacuum‐processed optoelectronic devices. For both new compounds, this substitution provides a twisted and shielded perylene π‐core whose, via OSiObridges, rigid structure affords well‐resolved absorption and emission spectra with strong fluorescence in solution, as well as in the solid state. The usefulness of these dyes for vacuum‐processed optoelectronic devices is demonstrated in organic light‐emitting diodes (OLEDs) that show monomer‐like emission spectra and high maximum external quantum efficiency (EQEmax) values of up to 3.1% for the doubly silicon‐bridged PBI.
KW  - organic light emitting diodes
KW  - perylene bisimide dyes
KW  - rigidification
KW  - solid‐state emission
KW  - vacuum processable
Y1  - 2023
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-312599
VL  - 11
IS  - 5
ER  -