BP4mPy

CAS Number 1009033-94-6

High Purity Sublimed Materials, Materials, OLED Materials, Semiconducting Molecules, TADF Materials

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	λ_max 252 nm in THF
Fluorescence	λ_max 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

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
Max. Power Efficiency	20.3 lm W⁻¹
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
Max. Power Efficiency	10.39 lm W⁻¹
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
Max. Power Efficiency	22.6 lm W⁻¹
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
Max. Power Efficiency	50.0 lm W⁻¹
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
Max. Power Efficiency	53.8 lm W⁻¹
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
Max. Power Efficiency	42.6 lm W⁻¹
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
Max. Power Efficiency	37.9 lm W⁻¹
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 sheet

Literature and Reviews

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.
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.
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.

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.
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.
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.
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.