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Product Code M2178A1-100mg
Price $275 ex. VAT

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BP4mPy, one of the most popular ETL and HBL material used in OLEDs

Paired with electron-donating materials to host red, green, and blue PhOLEDs


BP4mPy, namely 3,3',5,5'-Tetra[(m-pyridyl)-phen-3-yl]biphenyl, is one of the most popular electron-transporting and hole-blocking layer materials used in OLEDs. It is electron deficient due to the electron-withdrawing nature of its four pyridine pendants. Together with electron-donating materials (e.g. TCTA), BP4mPy can also be used as an exciplex host for red, green, and blue phosphorescent OLEDs. BP4mPy aids effective energy transfer from exciplexes to emitters, thus leading to high efficiencies.

General Information

CAS number 1009033-94-6
Full name 3,3',5,5'-Tetra[(m-pyridyl)-phen-3-yl]biphenyl, 3,5,3',5'-Tetra(3-pyrid-3-ylphenyl)-1,1'-biphenyl.
Chemical formula C56H38N4
Molecular weight 766.93 g/mol
Absorption λmax 252 nm in THF
Fluorescence λmax 352 nm in THF
HOMO/LUMO HOMO = 6.66 eV, LUMO = 2.57 eV [1]
Classification / Family Electron-transport layer (ETL) materials, Hole-blocking layer (HBL) materials, TADF materials.

Product Details

Purity Sublimed > 99% (HPLC)
Melting point Tg = 105 °C
Appearance Off-white crystals/powder

Chemical Structure

BP4mPy chemical structure
Chemical Structure of BP4mPy; CAS No. 1009033-94-6

Device Structure(s)

Device structure ITO (90 nm)/TAPC (65 nm)/TCTA (5 nm)/26DCzPPy:4 wt% B-2PXZ (30 nm)/BP4mPy (40 nm)/LiF (0.8 nm)/Al (150 nm) [2]
Colour Yellow yellow light emitting device
Max. Power Efficiency 20.3 lm W1
Max. Current Efficiency 32.2 cd/A
Max. EQE 10.1%
Device structure ITO (110 nm)/TAPC (30 nm)/mCP:1.0 wt% Os(bpftz)2(PPhMe2)2* (1 nm)/mCP:8.0 wt% Ir(bptz)2(bdp)* (18 nm)/mCP:7.0 wt% Os(bpftz)2(PPhMe2)2* (1 nm)/BP4mPy (50 nm)/LiF (0.8 nm)/Al (150 nm) [3]
Colour White white light emitting device
Max. Power Efficiency 10.39 lm W1
Max. Current Efficiency 13.25 cd/A
Max. EQE 6.16%
Device structure ITO/TAPC (40 nm)/mCP:Complex 2* 1 wt% (30 nm)/BP4mPy (40 nm)/LiF (0.8 nm)/Al (150 nm) [4]
Colour Green green light emitting device
Max. Power Efficiency 22.6 lm W1
Max. Current Efficiency 30.3 cd/A
Max. EQE 10.0%
Device structure ITO (90 nm)/TAPC:20 wt % of MoO3 (20 nm)/TAPC (30 nm)/26DCzPPy and x wt % PXZBM* (30 nm)/BP4mPy (40 nm)/LiF (0.8 nm)/Al (150 nm) [5]
Colour Green green light emitting device
Max. Power Efficiency 50.0 lm W1
Max. Current Efficiency 67.7 cd/A
Max. EQE 22.6%
Device structure ITO (110 nm)/TAPC (30 nm)/mCP and 8.0 wt% [Os(pz2py)(PPh2Me)2(CO)]* (30 nm)/BP4mPy (50 nm)/LiF (0.8 nm)/Al (150 nm) [6]
Colour Yellow yellow light emitting device
Max. Power Efficiency 53.8 lm W1
Max. Current Efficiency 61.0 cd/A
Max. EQE 13.8%
Device structure ITO/TAPC (40 nm)/TCTA 46 wt %:BP4mPy 46 wt %:fac-Ir(ppy)3 8 wt % (30 nm)/BP4mPy (40 nm)/LiF (0.8 nm)/Al (150 nm) [7]
Colour Green green light emitting device
Max. Power Efficiency 42.6 lm W1
Max. Current Efficiency 48.7 cd/A
Max. EQE 14.1%
Device structure ITO/TAPC (40 nm)/TCTA 46 wt %:BP4mPy 46 wt %:FIrpic 8 wt % (30 nm)/BP4mPy (40 nm)/LiF (0.8 nm)/Al (150 nm) [7]
Colour Blue blue light emitting device
Max. Power Efficiency 37.9 lm W1
Max. Current Efficiency 35.6 cd/A
Max. EQE 15.8%

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

Pricing

Grade Order Code Quantity Price
Sublimed (>99% purity) M2178A1 100 mg £220
Sublimed (>99% purity) M2178A1 250 mg £440
Sublimed (>99% purity) M2178A1 500 mg £740
Sublimed (>99% purity) M2178A1 1 g £1250

MSDS Documentation

BP4mPy MSDS BP4mPy MSDS sheet

Literature and Reviews

  1. Near infrared-emitting tris-bidentate Os(II) phosphors: control of excited state characteristics and fabrication of OLEDs, J. Liao et al., J. Mater. Chem. C, 3, 4910 (2015); DOI: 10.1039/c5tc00204d.
  2. Efficient donor-acceptor-donor borylated compounds with extremely small ΔEST for thermally activated delayed fluorescence OLEDs, C. Tsai et al., Org. Electron., 63, 166–174 (2018); DIO: 10.1016/j.orgel.2018.09.023.
  3. Blue-emitting Ir(III) phosphors with 2-pyridyl triazolate chromophores and fabrication of sky blue- and white emitting OLEDs, C. Chang et al., J. Mater. Chem. C, 1, 2639 (2013); DOI: 10.1039/c3tc00919j.
  4. Phosphorescent Organic Light-Emitting Diodes with Outstanding External Quantum Efficiency using Dinuclear Rhenium Complexes as Dopants, M. Mauro et al., Adv. Mater., 24, 2054–2058 (2012); DOI: 10.1002/adma.201104831.
  5. Optically Triggered Planarization of Boryl-Substituted Phenoxazine: Another Horizon of TADF Molecules and High-Performance OLEDs, ACS Appl. Mater. Interfaces, 10, 12886−12896 (2018); DOI: 10.1021/acsami.8b00053.
  6. Os(II) metal phosphors bearing tridentate 2,6-di(pyrazol-3-yl)pyridine chelate: synthetic design, characterization and application in OLED fabrication, J. Liao et al., J. Mater. Chem. C, 2, 6269-6282 (2014); DOI: 10.1039/C4TC00865K.
  7. Efficient red, green, blue and white organic lightemitting diodes with same exciplex host, C. Chang et al., Jpn. J. Appl. Phys., 56, 129209 (2017); DOI: 10.7567/JJAP.56.129209.

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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