1,3-Bis(N-carbazolyl)benzene, known as mCP, with a high triplet energy (E_T  = 2.91 eV) and a very deep highest occupied molecular orbital (HOMO) level, is often used as host materials for efficient blue phosphorescent light-emitting diodes. Kawamura et al. demonstrated that the photoluminescence internal quantum yield of the blue emitter of FIrpic could approach nearly 100% when doped into the wide energy gap host of mCP [1].

General Information

CAS number	550378-78-4
Chemical formula	C30H20N2
Molecular weight	408.49 g/mol
Absorption	λmax 292, 338 nm (in THF)
Fluorescence	λem 345, 360 nm (in THF)
HOMO/LUMO	HOMO = 5.9 eV, LUMO = 2.4 eV
Synonyms	mCP, 1,3-Di(9H-carbazol-9-yl)benzene, N,N′-Dicarbazolyl-3,5-benzene
Classification / Family	Carbazole derivatives, Hole transporting materials, Phosphorescent host materials, OLEDs, Organic electronics

Product Details

Purity	>99.5% (sublimed) >98.0% (unsublimed)
Melting point	173-178 °C (lit.)
Appearance	White powder

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

Chemical Structure

Device Structure(s)

Device structure	ITO(50 nm)/PEDOT:PSS(60 nm)/TAPC(20 nm)/mCP(10 nm)/CbBPCb*(25 nm)/Al(20 nm) [2]
Colour	Blue
Max. EQE	≥ 30%

Device structure	ITO/PEDOT:PSS/NPB/mCP/FPt*(1.5 nm)/OXD-7/CsF/Al [3]
Colour	White
Max. EQE	17.5%
Max. Power Efficiency	45 lm W−1

Device structure	ITO(50 nm)/PEDOT:PSS(60 nm)/TAPC(20 nm)/mCP(10 nm)/mCP:BmPyPb*:4CzIPN(25 nm)/TSPO1(35 nm)/LiF(1 nm)/Al(200 nm)   [4]
Colour	Green
Max. EQE	28.6%
Max. Power Efficiency	56.6 lm W−1

Device structure	ITO/DNTPD* (60 nm)/NPB (20 nm)/mCP (10 nm)/mCP:FIrpic (25 nm)/CBP:Ir(piq)2acac (5 nm)/BCP (5 nm)/Alq3 (20 nm)/LiF (1 nm)/Al (200 nm) [5]
Colour	White
EQE@500 cd/m2	8.2 %
Current Efficiency@500  cd/m2	12.7 lm W−1

Device structure	ITO/MoO3 (7nm)/NPB (85 nm)/ (PPQ)2Ir(acac):Ir(ppy)3:FIrpic:mCP/TAZ/LiF/Al [6]
Colour	White
Max. EQE	20.1%
Max. Power Efficiency	41.3 lm W−1

Device structure	ITO/PEDOT:PSS(40 nm)/mCP:PVK:OXD-7(33:33:22 wt%):(dfpmpy)2Ir(pic-N-O):(F4PPQ)2Ir(pic-N-O):(EO2- Cz-PhQ)2Ir(acac)*(12:0.25:0.15 wt%)(50-60 nm)/TmPyPB(20 nm)/LiF(1 nm)/Al(150 nm) [7]
Color	White
Max. EQE	11.45%
Max. Current Efficiency	23.04 cd/A
Max. Power Efficiency	8.04 lm W−1

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

Pricing

Grade	Order Code	Quantity	Price
Sublimed (>99.5%)	M371	1 g	£89.00
Sublimed (>99.5%)	M371	5 g	£338.00
Unsublimed (>98.0%)	M372	5 g	£199.00

MSDS Documentation

mCP MSDS sheet

Literature and Reviews

1. 100% phosphorescence quantum efficiency of Ir(III) complexes in organic semiconductor films, Y. Kawamura et al., Appl. Phys. Lett. 86, 071104 (2005); http://dx.doi.org/10.1063/1.1862777.
2. Above 30% External Quantum Efficiency in Blue Phosphorescent Organic Light-Emitting Diodes Using Pyrido[2,3- b]indole Derivatives as Host Materials, C. Lee et al., Adv. Mater., 25, 5450–5454 (2013).
3. Efficient organic light-emitting devices with platinum-complex emissive layer, X. Yang et al., Appl. Phys. Lett., 98, 033302 (2011); doi: 10.1063/1.3541447.
4. Engineering of Mixed Host for High External Quantum Efficiency above 25% in Green Thermally Activated Delayed Fluorescence Device, B. Kim et al., Adv. Funct. Mater., 24, 3970–3977 (2014).
5. Improved color stability in white phosphorescent organic light-emitting diodes using charge confining structure without interlayer, S-H. Kim et al., Appl. Phys. Lett. 91, 123509 (2007); http://dx.doi.org/10.1063/1.2786853.
6. Manipulating Charges and Excitons within aSingle-Host System to Accomplish Efficiency/CRI/Color-Stability Trade-off for High-PerformanceOWLEDs, Q. Wang et al., Adv. Mater., 21, 2397–2401 (2009).
7. Single emissive layer white phosphorescent organic light-emitting diodes based on solution-processed iridium complexes, W. Cho et al., Dyes and Pigments, 108, 115-120 (2014), doi:10.1016/j.dyepig.2014.04.033.
8. Wide-Energy-Gap Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes, S. Ye et al., Chem. Mater., 21 (7), 1333–1342 (2014).
9. High efficiency phosphorescent organic light-emitting diodes using carbazole-type triplet exciton blocking layer, S. Kim et al., Appl. Phys. Lett., 90, 223505 (2007); http://dx.doi.org/10.1063/1.2742788.
10. Deep blue phosphorescent organic light-emitting diodes with excellent external quantum efficiency, J. Park et al., Org. Electronics, 14 (12), 3228-3233 (2013), doi:10.1016/j.orgel.2013.09.017.

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To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.

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