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Product Code M371-1g
Price $163 ex. VAT

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mCP, often used as a host material for efficient blue phosphorescent LEDs

Increases the photoluminescence internal quantum yield of FIrpic

1,3-Bis(N-carbazolyl)benzene, known as mCP, with a high triplet energy (ET  = 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


>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

chemical structure of mCP
Chemical structure of 1,3-Bis(N-carbazolyl)benzene (mCP)

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 blue light emitting device
Max. EQE ≥ 30%
Device structure ITO/PEDOT:PSS/NPB/mCP/FPt*(1.5 nm)/OXD-7/CsF/Al [3]
Colour White white light emitting device
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 green light emitting device
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 white light emitting device
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 white light emitting device
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 white light emitting device
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.


 Grade Order Code Quantity Price
Sublimed (>99.5%) M371 1 g £130
Sublimed (>99.5%) M371 5 g £500
Unsublimed (>98.0%) M372 5 g £260

MSDS Documentation


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);
  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);
  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 iridiumcomplexes, 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);
  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.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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