B3PyPB


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Order Code: M2127A1

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, BmPyPhB
Classification / Family Organic electronics, Hole blocking layer materials (HBL), Electron transporting layer materials (ETL), TADF-OLEDs, Sublimed materials.

Product Details

Purity Sublimed: 99.76% (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.

 

b3pypb chemical structure
Chemical structure of B3PyPB; CAS No. 1030380-38-1.

 

Applications

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.

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
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
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
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
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
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
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
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.


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.