mCBP-CN

mCBP-CN, electron transporting host material

Better film morphology and device thermal stability compared to mCBP

mCBP-CN, or 3,3′-di(carbazol-9-yl)-5-cyano-1,1′-biphenyl, has a structure of two carbazole units attached to a biphenyl linker. The only difference that it has to the well known host mCBP is that a polar cyano (CN) group is attached to one of the phenyls. The asymmetrically attached CN group can both increase the ground-state dipole moment and greatly improve film morphology and device thermal stabilities.

The strong electron withdrawing CN group can also effectively alter the electron densities of the orbitals, making mCBP-CN an electron transporting host with deep HOMO/LUMO energy levels (while mCBP is a hole transport host material).

General Information

Product Details

*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials.

Chemical Structure

Device Structure(s)

Device structure	ITO (50 nm)/HAT-CN (10 nm)/TAPC (40 nm)/mMCP (10 nm)/3 wt% BOBS-Z*:mCBP-CN (30 nm)/PPF (10 nm)/B3PyPB (30 nm)/Liq (1 nm)/Al (100 nm) [2]
Colour	Blue
Max Current Efficiency	15.7 cd/A
Max. Power Efficiency	24.2 Im/W
Max. EQE	24.2%

Device structure	ITO (50 nm)/HAT-CN (10 nm)/TAPC (40 nm)/mMCP (10 nm)/3 wt% BSBS-Z*:mCBP-CN (30 nm)/PPF (10 nm)/B3PyPB (30 nm)/Liq (1 nm)/Al (100 nm) [2]
Colour	Blue
Max Current Efficiency	18.7 cd/A
Max. Power Efficiency	20.2 Im/W
Max. EQE	24%

Device structure	ITO (50 nm)/HAT-CN (10 nm)/TAPC (40 nm)/mMCP (10 nm)/3 wt% ν-DABNA*:mCBP-CN (30 nm)/PPF (10 nm)/B3PyPB (30 nm)/Liq (1 nm)/Al (100 nm) [2]
Colour	Blue
Max Current Efficiency	21.4 cd/A
Max. Power Efficiency	22.1 Im/W
Max. EQE	22.7%

Device structure	ITO/BPBPA* : HATCN (40 nm : 30%)/BPBPA (10 nm)/PCZAC(10 nm)/mCBPCN:oCBP:CNIr (30 nm:50%:10%)/26DBFPTPy* (5 nm)/ZADN (20 nm)/LiF (1.5 nm)/Al (200 nm) [3]
Colour	Blue
Max Current Efficiency	42.0 cd/A
Max. Power Efficiency	43.9 Im/W
Max. EQE	24.1%

Device structure	ITO/BPBPA* : HATCN (40 nm : 30%)/BPBPA (10 nm)/PCZAC(10 nm)/mCBPCN:oCBP:CNIr (30 nm:50%:10%)/26DBTPTPy* (5 nm)/ZADN (20 nm)/LiF (1.5 nm)/Al (200 nm) [3]
Colour	Blue
Max Current Efficiency	41.0 cd/A
Max. Power Efficiency	42.7 Im/W
Max. EQE	23.6%

Device structure	ITO/BPBPA* : HATCN (40 nm : 30%)/BPBPA (10 nm)/PCZAC(10 nm)/mCBPCN:oCBP:CNIr (30 nm:50%:10%)/BmPyPB (5 nm)/ZADN (20 nm)/LiF (1.5 nm)/Al (200 nm) [3]
Colour	Blue
Max Current Efficiency	39.1 cd/A
Max. Power Efficiency	40.9 Im/W
Max. EQE	22.3%

*For chemical structure information, please refer to the cited references.

Pricing

MSDS Documentation

mCBP-CN MSDS sheet

Literature and Reviews

1. An Alternative Host Material for Long-Lifespan Blue Organic Light-Emitting Diodes Using Thermally Activated Delayed Fluorescence, S. Ihn et al., Adv. Sci., 1600502 (2017); DOI: 10.1002/advs.201600502.
2. Achieving Ultimate Narrowband and Ultrapure Blue Organic Light-Emitting Diodes Based on Polycyclo-Heteraborin Multi-Resonance Delayed-Fluorescence Emitters, I Park et al., Adv. Mater., 34 (9), 2107951 (2022); DOI: 10.1002/adma.202107951.
3. Novel hole blocking materials based on 2,6-disubstituted dibenzo[b,d]furan and dibenzo[b,d]thiophene segments for high-performance blue phosphorescent organic light-emitting diodes, S. Jang et al.,  J. Mater. Chem. C, 7, 826 (2019); DOI: 10.1039/c8tc04900a.
4. Rigid Oxygen-Bridged Boron-Based Blue Thermally Activated Delayed Fluorescence Emitter for Organic Light-Emitting Diode: Approach towards Satisfying High Efficiency and Long Lifetime Together, D. Ahn et al., Adv. Optical Mater., 8 (11), 2000102 (2020); DOI: 10.1002/adom.202000102.
5. Photophysics of TADF Guest−Host Systems: Introducing the Idea of Hosting Potential, K. Stavrou et al., ACS Appl. Electron. Mater., 2, 9, 2868–2881 (2020); DOI: 10.1021/acsaelm.0c00514.