TY - JOUR
T1 - Indolo[3,2,1-jk]carbazole based planarized CBP derivatives as host materials for PhOLEDs with low efficiency roll-off
AU - Kautny, Paul
AU - Wu, Zhongbin
AU - Eichelter, Johanna
AU - Horkel, Ernst
AU - Stöger, Berthold
AU - Chen, Jiangshan
AU - Ma, Dongge
AU - Fröhlich, Johannes
AU - Lumpi, Daniel
N1 - Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/7
Y1 - 2016/7
N2 - Three novel planarized CPB derivatives (ICzCz, ICzPCz, ICzICz) have been synthesized and characterized concerning applications as host materials for PhOLEDs. The incorporation of fully planar indolo[3,2,1-jk]carbazole (ICz) in the CBP scaffold has been systematically investigated, revealing a significant impact on molecular properties, such as improved thermal stability (tg > 110 °C), high triplet energies (ET > 2.81 eV) and charge transport properties. Employing the newly developed materials as host materials, efficient green PhOLEDs (CEmax: 60.1 cd A-1, PEmax: 42.1 lm W-1, EQEmax: 15.9%) with a remarkably low efficiency roll-off of 5% at 1000 cd m-2 as well as blue PhOLEDs (ICzCz) with a high PE of 26.1 lm W-1 have been realized. Hence, the first comprehensive report on the application of ICz as integral building block for electroluminescent materials is presented, establishing this particular structural motive as versatile structural motive in this field.
AB - Three novel planarized CPB derivatives (ICzCz, ICzPCz, ICzICz) have been synthesized and characterized concerning applications as host materials for PhOLEDs. The incorporation of fully planar indolo[3,2,1-jk]carbazole (ICz) in the CBP scaffold has been systematically investigated, revealing a significant impact on molecular properties, such as improved thermal stability (tg > 110 °C), high triplet energies (ET > 2.81 eV) and charge transport properties. Employing the newly developed materials as host materials, efficient green PhOLEDs (CEmax: 60.1 cd A-1, PEmax: 42.1 lm W-1, EQEmax: 15.9%) with a remarkably low efficiency roll-off of 5% at 1000 cd m-2 as well as blue PhOLEDs (ICzCz) with a high PE of 26.1 lm W-1 have been realized. Hence, the first comprehensive report on the application of ICz as integral building block for electroluminescent materials is presented, establishing this particular structural motive as versatile structural motive in this field.
KW - Blue PhOLED
KW - High triplet energy
KW - Low efficiency roll-off
KW - Planarized CPB derivatives
KW - Structure property relationship
UR - http://www.scopus.com/inward/record.url?scp=84964931762&partnerID=8YFLogxK
U2 - 10.1016/j.orgel.2016.04.036
DO - 10.1016/j.orgel.2016.04.036
M3 - 文章
AN - SCOPUS:84964931762
SN - 1566-1199
VL - 34
SP - 237
EP - 245
JO - Organic Electronics
JF - Organic Electronics
ER -