mCBP-CN Chemical Properties

Boiling point:

663.6±55.0 °C(Predicted)

Density 

1.22±0.1 g/cm3(Predicted)

InChI

InChI=1S/C37H23N3/c38-24-25-20-27(23-29(21-25)40-36-18-7-3-14-32(36)33-15-4-8-19-37(33)40)26-10-9-11-28(22-26)39-34-16-5-1-12-30(34)31-13-2-6-17-35(31)39/h1-23H

InChIKey

XGGPGPGOGFLZQC-UHFFFAOYSA-N

SMILES

C1(C2=CC=CC(N3C4=C(C=CC=C4)C4=C3C=CC=C4)=C2)=CC(N2C3=C(C=CC=C3)C3=C2C=CC=C3)=CC(C#N)=C1

mCBP-CN Usage And Synthesis

Description

3,3′-di(9H-carbazol-9-yl)-1,1′-biphenyl (mCBP) and 3′,5-di(9H-carbazol-9-yl)-[1,1′-biphenyl]-3-carbonitrile (mCBP-CN) is a stable host that could be used to synthesise several highly stable blue TADF devices.mCBP-CN is a better film morphology and device thermal stability compared to CBP. mCBP-CN is well-fitted for 5,8-bis(4-(2,6-diphenylpyrimidin-4-yl)phenyl)-5,8-dihydroindolo[2,3-c]carbazole (BDpyInCz) having shallow LUMO and the highest occupied molecular orbital (HOMO) because mCBP-CN has an ET-type character with deep LUMO. So the emitting layer composed of mCBP-CN and the highly doped BDpyInCz works like a mixed host system. The electrons are mainly injected into and transported through the ET-type host material. In contrast, a considerable number of holes are probably injected into TADF emitters and transported through the percolation pathway composed of the emitters having a hole transporting (HT)-type character in our device[1].

References

[1] Soo-Ghang Ihn. “An Alternative Host Material for Long-Lifespan Blue Organic Light-Emitting Diodes Using Thermally Activated Delayed Fluorescence.” Advanced Science 4 8 (2017).