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Product Code M2174A1-250mg
Price $438 ex. VAT

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B3PymPm, ETL and HBL material in OLED devices

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


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

Pricing

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.
  4. Design of Heteroleptic Ir Complexes with Horizontal Emitting Dipoles for Highly Efficient Organic Light-Emitting Diodes with an External Quantum Efficiency of 38%, K. Kim et al,  Chem. Mater., 28, 7505−7510 (2016); DOI: 10.1021/acs.chemmater.6b03428.
  5. Organic Light-Emitting Diodes with 30% External Quantum Efficiency Based on a Horizontally Oriented Emitter, S. Kim et al., Adv. Funct. Mater., 23, 3896–3900 (2013); DOI: 10.1002/adfm.201300104.
  6. Highly Effi cient Organic Light-Emitting Diodes with Phosphorescent Emitters Having High Quantum Yield and Horizontal Orientation of Transition Dipole Moments, K. Kim et al., Adv. Mater., 26, 3844–3847 (2014); DOI: 10.1002/adma.201305733.

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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