B3PymPm

B3PymPm, ETL and HBL material in OLED devices

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

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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

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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

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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

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Device Structure(s)

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

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

Pricing

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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

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B3PymPm MSDS sheet

Literature and Reviews

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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.

View Literature and Reviews