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B3PyPB CAS 1030380-38-1
Product Code M2127A1-100mg
Price $260 ex. VAT
$ USD

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B3PyPB, ETL and HBL material in OLED devices

Used to improve the performance of PhOLEDs

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 (ET = 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
Fluorescence 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.

Chemical Structure

b3pypb chemical structure
Chemical structure of B3PyPB

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 blue light emitting device
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 blue light emitting device
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 blue light emitting device
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 blue light emitting device
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 white light emitting device
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 green light emitting device
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 blue light emitting device
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 £200
Sublimed (>99.0% purity) M2127A1 250 mg £400
Sublimed (>99.0% purity) M2127A1 500 mg £680
Sublimed (>99.0% purity) M2127A1 1 g £1150

MSDS Documentation

B3PyPB MSDSB3PyPB 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.
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