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Product Code M2174A1-250mg
Price £350 ex. VAT

B3PymPm, ETL and HBL material in OLED devices

Paired with TCTA to be used in TADF devices to fabricate highly-efficient fluorescent OLEDs

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

B3PymPm is an isomer to B2PymPm and B4PymPm, with a 2-methylpyrimidine core structure with four pyridine pendants. It is electron-deficient and can be used in OLED devices as an electron-transporting or hole-blocking layer material.

B3PymPm is known to form hydrogen bonding in and between molecules. The intermolecular and intramolecular hydrogen bonding are believed to promote film morphology - hence enhancing charge mobility.

Due to its electron-deficient nature, together with TCTA, B3PymPm is also used in thermally activated delayed fluroescent (TADF) devices as an exciplex-forming co-host to fabricate highly-efficient fluorescent organic light-emitting diodes.

General Information

CAS number 925425-96-3
Full name 4,6-Bis(3,5-di(pyridin-3-yl)phenyl)-2-methylpyrimidine, 4,6-Bis(3,5-di-3-pyridinylphenyl)-2-methylpyrimidine
Chemical formula C37H26N6
Molecular weight 554.64 g/mol
Absorption* λmax 248 nm in DCM
Fluorescence n/a
HOMO/LUMO HOMO = 6.97 eV, LUMO = 3.53 eV [1]; ET1 = 3.08 eV
Classification / Family Pyrimidine derivatives, Highly efficient light-emitting diodes, Organic electronics, Electron-transport layer (ETL) materials, Hole-blocking layer (HBL) materials, Sublimed materials.

* Measurable with an optical spectrometer, see our spectrometer application notes.

Product Details

Purity Sublimed >99.0% (HPLC), unsublimed >98.0%
Melting point 326 °C
Appearance White crystals/powder

* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials.

Chemical Structure

B3PymPm chemical structure
Chemical structure of B3PymPm

Device Structure(s)

Device structure ITO/15 wt.% Rb2CO3:B3PymPm (20 nm)/B3PymPm (30 nm)/8 wt.% Ir(ppy)3:CBP (15 nm)/TAPC (30 nm)/8 wt.% ReO3:TAPC (20 nm)/Al [2]
Colour Green green light emitting device
Max. Power Efficiency 79.8 lm W−1
Max. EQE  19.8%
Device structure ITO (150 nm)/TAPC (20 nm)/TCTA (10 nm)/TCTA:B3PYMPM:Ir(mphq)2(acac) (5 nm, 3 wt%)/TCTA:B3PYMPM:Ir(ppy)2(acac) (25 nm, 8 wt%)/B3PYMPM (45 nm)/LiF (0.7 nm)/Al (100 nm) [3]
Colour Orange orange light emitting device
Max. Power Efficiency 70.1 lm W−1
Max. EQE 22.8%
Device structure ITO (70 nm)/ TAPC (75 nm)/TCTA (10 nm)/TCTA:B3PYMPM:4 wt % Ir(dmppy-pro)2tmd* (30 nm)/B3PYMPM (45 nm)/LiF (0.7 nm)/Al (100 nm) [4]
Colour Green green light emitting device
Max. Current Efficiency 126 cd/A
Max. EQE  36.0%
Device structure ITO (70 nm)/ TAPC (75 nm)/TCTA (10 nm)/TCTA:B3PYMPM:4 wt % Ir(dmppy-ph)2tmd* (30 nm)/B3PYMPM (55 nm)/LiF (0.7 nm)/Al (100 nm) [4]
Colour Yellow yellow device
Max. Current Efficiency 108 cd/A
Max. EQE  38.1%
Device structure ITO (70 nm)/TAPC ( 80 nm)/TCTA (10 nm)/TCTA:B3PYMPM:8 wt% Ir(ppy)2(acac)
(30 nm)/B3PYMPM (40 nm)/Al (100 nm) [5]
Colour Green green light emitting device
Max. Current Efficiency 127.3 lm W−1
Max. EQE 30.2%
Device structure ITO (70 nm)/TAPC (75 nm)/TCTA (10 nm)/TCTA:B3PYMPM:8.4 mol% Ir(ppy)2tmd* (30 nm)/B3PYMPM (45 nm)/LiF (0.7 nm)/Al (100 nm) [6]
Colour Green green light emitting device
Max. Current Efficiency 142.5 lm W−1
Max. EQE 32.3%

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


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2174A1 250 mg £350
Unsublimed (>98.0% purity) M2174B1 500 mg £300
Sublimed (>99.0% purity) M2174A1 500 mg £580
Unsublimed (>98.0% purity) M2174B1 1 g £480
Sublimed (>99.0% purity) M2174A1 1 g £900
Unsublimed (>98.0% purity) M2174B1 5 g £1850

MSDS Documentation

B3PymPm MSDSB3PymPm MSDS sheet

Literature and Reviews

  1. Development of high performance OLEDs for general lighting, H. Sasabe et al., J. Mater. Chem. C, 1, 1699 (2013); DOI: 10.1039/c2tc00584k.
  2. A high performance inverted organic light emitting diode using an electron transporting material with low energy barrier for electron injection, J. Lee et al., Org. Electron., 12, 1763–1767 (2011); doi: 10.1016/j.orgel.2011.07.015.
  3. High efficiency and non-color-changing orange organic light emitting diodes with red and green emitting layers, S. Lee et al., Org. Electron., 14, 1856–1860 (2013); doi: 10.1016/j.orgel.2013.04.020.
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