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Triazine Based Bipolar Host Materials for Blue Phosphorescent OLEDs

Title data

Wagner, Daniel ; Hoffmann, Sebastian T. ; Heinemeyer, Ute ; Münster, Ingo ; Köhler, Anna ; Strohriegl, Peter:
Triazine Based Bipolar Host Materials for Blue Phosphorescent OLEDs.
In: Chemistry of Materials. Vol. 25 (2013) Issue 18 . - pp. 3758-3765.
ISSN 1520-5002
DOI: https://doi.org/10.1021/cm4023216

Official URL: Volltext

Abstract in another language

Two novel bipolar host materials BPTRZ and MBPTRZ were synthesized, in which the hole transporting carbazole is separated from the electron transporting triazine moiety by a fully aromatic, but nonconjugated meta-linked biphenyl unit. The additional twist at the biphenyl in MBPTRZ, which is achieved by methyl-substitution in 2- and 2′-position of the biphenyl leads to a higher triplet energy of 2.81 eV compared to 2.70 eV for BPTRZ. Both materials possess high thermal stabilities and good glass forming properties. An organic light emitting diode with MBPTRZ as host for the blue phosphorescence emitter FIrpic shows a maximum luminance of 30600 cd/m2 and a maximum external quantum efficiency of 7.0%.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: host material; bipolar; triazine; carbazole; phosphorescence; blue OLED
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie - Univ.-Prof. Dr. Anna Köhler
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 10 Feb 2015 08:00
Last Modified: 10 Feb 2015 08:11
URI: https://eref.uni-bayreuth.de/id/eprint/6656