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Product Code M2175A1-250mg
Price £350 ex. VAT

B4PymPm, ETL and HBL material in OLEDs and photovoltaics

Significantly enhances charge-carrier mobility and transport

Overview | Specifications | Pricing and Options | MSDS | Literature and Reviews

B4PymPm is an isomer to B2PymPm and B3PymPm. It has a 2-methylpyrimidine core structure with four pyridine pendants. It is electron-deficient and can be used in OLEDs and photovoltaics (e.g. perovskite solar cells) as an electron-transporting or hole-blocking layer material.

Due to its intermolecular hydrogen bonding, B4PymPm molecules self-assemble in a horizontal orientation - parallel to the substrate, with a significantly large anisotropy. This self-assembly gives high molecular stacking in films with high π-orbital overlaps, which can significantly enhance charge-carrier mobility and transport.

General Information

CAS number 1030380-51-8
Full name 4,6-Bis(3,5-di(pyridin-4-yl)phenyl)-2-methylpyrimidine, 4,6-Bis(3,5-di-4-pyridinylphenyl)-2-methylpyrimidine
Chemical formula C37H26N6
Molecular weight 554.64 g/mol
Absorption λmax 250 nm in DCM
Fluorescence λmax 410 nm in Film
Synonyms 4,6-Bis(3,5-di-4-pyridinylphenyl)-2-methylpyrimidine

HOMO = −7.3 eV

LUMO = −3.7 eV [6]

Classification / Family Pyrimidine derivatives, Highly efficient light-emitting diodes, Organic electronics, Electron-transport layer (ETL) materials, Hole-blocking layer (HBL) materials, Sublimed materials.

Product Details

Purity Sublimed >99.0% (HPLC)
Melting point 374 °C (lit.)
Appearance White crystals/powder

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

Chemical Structure

Chemical structure of B4PymPm
Chemical structure of B4PymPm

Device Structure(s)

Device structure ITO (110 nm)/HAT-CN (10 nm)/TAPC (40 nm)/TCTA (10 nm)/mCP (10 nm)/mCP:B4PyMPM:15 wt% FIrpic (20 nm)/B4PyMPM (50 nm)/Liq (0.8 nm)/Al (120 nm) [2]
Colour Blue blue light emitting device
Max. Power Efficiency 79.8 lm W−1
Max. Current Efficiency 41.3 cd/A
Max. EQE  17.3%
Device structure ITO (110 nm)/TAPC (40 nm)/TCTA (10 nm)/mCP (10 nm)/mCP:50 wt% B4PyMPM:15 wt% FIrpic:0.2 wt% PO-01* (20 nm)/B4PyMPM (50 nm)/Liq (0.8 nm)/Al (120 nm) [2]
Colour White white light emitting device
Max. Power Efficiency 105.0 lm W−1
Max. Current Efficiency 83.6 cd/A
Max. EQE  28.1%
Device structure ITO (70 nm)/TAPC (75 nm)/TCTA (10 nm)/ TCTA:B4PYMPM:8 wt% Ir(ppy)2tmd (30 nm)/B4PYMPM (50 nm)/LiF (0.7 nm)/Al (100 nm) [3]
Colour Yellow yellow device
Max. Power Efficiency 152.5 lm W−1
Max. EQE  30.4%
Device structure ITO/HAT-CN (5 nm)/TAPC (30 nm)/TCTA (8 nm)/26DCzPPy:PO-01 (4 wt%, 2 nm)/26DCzPPy:B4PyMPM:FIrpic (1:1, 15 wt%, 20 nm)/
B4PyMPM (15 nm)/Bphen:LiH 0.1 wt% (25 nm)/Al (120 nm) [4]
Colour White white light emitting device
Max. Power Efficiency 95.5 lm W−1
Max. Current Efficiency 82.0 cd/A
Max. EQE  28.5%

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


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2175A1 250 mg £350
Sublimed (>99.0% purity) M2175A1 500 mg £580
Sublimed (>99.0% purity) M2175A1 1 g £900

MSDS Documentation

B4PymPm MSDSB4PymPm MSDS sheet

Literature and Reviews

  1. Influence of Substituted Pyridine Rings on Physical Properties and Electron Mobilities of 2-Methylpyrimidine Skeleton-Based Electron Transporters, H, Sasabe et al., Adv. Funct. Mater., 21, 336–342 (2011); DOI: 10.1002/adfm.201001252.
  2. White Organic LED with a Luminous Efficacy Exceeding 100 lm W−1 without Light Out-Coupling Enhancement Techniques, S. Wu et al., Adv. Funct. Mater., 27, 1701314 (2017); DOI: 10.1002/adfm.201701314.
  3. Highly Efficient, Conventional, Fluorescent Organic Light-Emitting Diodes with Extended Lifetime, H. Kim et al., Adv. Mater., 29, 1702159 (2017); DOI: 10.1002/adma.201702159.
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