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Product Code M371-1g
Price £130 ex. VAT

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.

When fabricating devices, processing and handling materials in a glove box helps maintain their purity and maintain efficiency by avoiding contamination from particulates, moisture, and airborne impurities.


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.

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