B3PymPm

chemical structure of B3PymPm
Order Code: M2174A1
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 Grade Order Code Quantity Price
Sublimed (99.3% purity) M2174A1 250 mg £266.3
Sublimed (99.3% purity) M2174A1 500 mg £426.2
Sublimed (99.3% purity) M2174A1 1 g £681.9

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.

Product Details

Purity Sublimed 99.3% (HPLC)
Melting point 326 °C
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 for OLED Devices page.

 

b3pympm chemical structure
Chemical structure of B3PymPm; CAS No. 925425-96-3.

 

Applications

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 bondings 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 cohost to fabricate highly-efficient fluorescent organic light-emitting diodes.

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
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
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
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
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
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
Max. Current Efficiency 142.5 lm W−1
Max. EQE 32.3%

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

 

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.
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