Bearing four pyridyl groups, B3PyPB is electron deficient and has high electron mobility. It is widely used as an electron-transport material (ETL) in OLED devices. With a deep HOMO energy level (6.60 eV), B3PyPB is also used as a hole-blocking layer material (EBL). 

Having a high triplet energy (E_T = 2.77 eV), B3PyPB is used in phosphorescent OLEDs to suppress triplet quenching of the light-emitting molecules, leading to higher external quantum efficiency - hence improving the device performance.

General Information

CAS number	1030380-38-1
Full name	1,3-Bis(3,5-dipyrid-3-ylphenyl)benzene
Chemical formula	C38H26N4
Molecular weight	538.64 g/mol
Absorption	λmax 259 nm in film
Fluorescene	λem 359 nm in film
HOMO/LUMO	HOMO 6.60 eV, LUMO 2.60 eV [1]
Synonyms	1,3-Bis[3,5-di(pyridin-3-yl)phenyl]benzene, BmPyPB, BmPyPhB
Classification / Family	Organic electronics, Hole blocking layer materials (HBL), Electron transporting layer materials (ETL), TADF-OLEDs, Sublimed materials.

Product Details

Purity	Sublimed: >99.0% (HPLC)
Melting point	TGA: >350 °C (0.5% weight loss)
Colour	White powder/crystals

*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.

Chemical Structure

Device Structure(s)

Device structure	ITO (130 nm)/TAPC (60 nm)/TCTA:7 wt% FIrpic (5 nm)/TCTA:FIrpic 20 wt% (5 nm)/B3PyPB (20 nm)/ B3PyPB:25 wt% Liq (35 nm)/Liq (1 nm)/Al (100 nm) [2]
Colour	Blue
Current Efficiency@100 cd/m2	51.6 cd/A
EQE@100 cd/m2	21.8%
Power Efficiency@100 cd/m2	56.5 lm W-1

Device structure	ITO (130 nm)/TAPC (60 nm)/TCTA:7 wt% FIrpic (5 nm)/TCTA:FIrpic 20 wt% (5 nm)/B3PyPB (20 nm)/B3PyPB:25wt% Liq (35 nm)/Liq (1 nm)/Al (1 nm)/MoO3 (5 nm)/TAPC (60 nm)/TCTA:7 wt% FIrpic (5 nm)/TCTA: FIrpic 20 wt% (10 nm)/B3PyPB (20 nm)/B3PyPB: 25wt% Liq (35 nm /Liq (1 nm) [2]
Colour	Blue
Current Efficiency@100 cd/m2	90.0 cd/A
EQE@100 cd/m2	41.1%
Power Efficiency@100 cd/m2	40.8 lm W-1

Device structure	ITO/triphenylamine-containing polymer: PPBI (20 nm)/TAPC (20 nm)/ 10 wt% CzAc-26DPPM:mCP (10 nm)/10 wt% CzAc-26DPPM:DPEPO (10 nm)/B3PyPB (50 nm)/LiF (0.5 nm)/Al (100 nm) [3]
Colour	Blue
Current Efficiency@100 cd/m2	53.9 cd/A
EQE@100 cd/m2	22.8%
Power Efficiency@100 cd/m2	59.2 lm W-1

Device structure	ITO/triphenylamine-containing polymer: PPBI* (20 nm)/TAPC (20 nm)/ 10 wt% CzAc-26DPPM:mCP (10 nm)/10 wt% CzAc-26DPPM:DPEPO (10 nm)/B3PyPB (50 nm)/LiF (0.5 nm)/Al (100 nm) [4]
Colour	Blue
Max. Current Efficiency	28.6 cd/A
Max. EQE	18.6%
Max. Power Efficiency	35.9 lm W-1

Device structure	ITO (130 nm)/TAPC (40 nm)/TCTA (5 nm)/ PQ2Ir(dpm) 2 wt % doped CBP (1 nm)/Ir(ppy)3 6 wt % doped CBP (1 nm)/Ir(dbfmi)* 10 wt % doped PO9 (10 nm)/B3PyPB (50 nm)/LiF (0.5 nm)/Al (100 nm) [4]
Colour	White
Max. Current Efficiency	53.7 cd/A
Max. EQE	23.3%
Max. Power Efficiency	55.2 lm W-1

Device structure	ITO (130 nm)/TAPC (35 nm)/5 wt% 4CzIPN-doped CBP (15 nm)/B3PyPB (65 nm)/LiF (0.8 nm)/Al (100 nm) [5]
Colour	Green
Max Current Efficiency	71.2 cd/A
Max EQE	21.8%
Max. Power Efficiency	60.9 lm W-1

Device structure	ITO (90 nm)/HATCN (5 nm)/TAPC (65 nm)/10 wt% fac -Ir(mpim)3 -doped TCTA (5 nm)/10 wt% fac -Ir(mpim)3 -doped 26DCzPPy (5 nm)/B3PyPB (65 nm)/Liq (2 nm)/Al (80 nm) [6]
Colour	Blue
Current Efficiency@100 cd/m2	73.2 cd/A
EQE@100 cd/m2	29.6%
Power Efficiency@100 cd/m2	76.5 lm W-1

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

Pricing

Grade	Order Code	Quantity	Price
Sublimed (>99.0% purity)	M2127A1	100 mg	£151.00
Sublimed (>99.0% purity)	M2127A1	250 mg	£302.00
Sublimed (>99.0% purity)	M2127A1	500 mg	£513.00
Sublimed (>99.0% purity)	M2127A1	1 g	£872.00

MSDS Documentation

B3PyPB MSDS sheet

Literature and Reviews

1. High efficiency solution processed OLEDs using a thermally activated delayed fluorescence emitter, R. Komatsu et al., Synth. Met., 202, 165–168 (2015); doi: 10.1016/j.synthmet.2015.02.009.
2. Ultra high-efficiency multi-photon emission blue phosphorescent OLEDs with external quantum efficiency exceeding 40%, H. Sasabe et al., Org. Electron., 13, 2615–2619 (2012); doi: 0.1016/j.orgel.2012.07.019.
3. Significant Enhancement of Blue OLED Performances through Molecular Engineering of Pyrimidine-Based Emitter, K. Nakao et al., Adv. Optical Mater., 5, 1600843 (2017); DOI: 10.1002/adom.201600843.
4. High-Efficiency Blue and White Organic Light-Emitting Devices Incorporating a Blue Iridium Carbene Complex, H. Sasabe et al., Adv. Mater., 22, 5003–5007 (2010); DOI: 10.1002/adma.201002254.
5. High-Performance Green OLEDs Using Thermally Activated Delayed Fluorescence with a Power Efficiency of over 100 lm/W, Y. Seino et al., Adv. Mater., 28, 2638–2643 (2016); DOI: 10.1002/adma.201503782.
6. Low-Driving-Voltage Blue Phosphorescent Organic Light-Emitting Devices with External Quantum Efficiency of 30%, K. Udagawa et al., Adv. Mater., 26, 5062–5066 (2014); DOI: 10.1002/adma.201401621.

7. Recent Progress in High-Efficiency Blue-Light-Emitting Materials for Organic Light-Emitting Diodes, Y. Im et al., Adv. Funct. Mater., 27, 1603007 (2017); DOI: 10.1002/adfm.201603007.

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To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.

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