Order Code: M2088A1
Price excludes taxes
Not in stock (price excludes taxes)

General Information

CAS number 929203-02-1
Chemical formula C42H42BN3
Molecular weight 599.61 g/mol
Absorption λmax 331 nm in THF
Fluorescence λem 382 nm in THF
Synonyms Tris(2,4,6-trimethyl-3-(pyridin-3-yl)phenyl)borane, Tri[3-(3-pyridyl)mesityl]borane
Classification / Family Electron-transporting materials, Phosphorescent host materials, Light-emitting diodes, Perovskite solar cells, Organic electronics, TADF materials, Sublimed materials

Product Details

Purity Sublimed >99.8% (HPLC)
Melting point TGA: 250 °C (0.5% weight loss)
Appearance 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.


3tpymb chemical structure, 929203-02-1
Chemical Structure of Tris(2,4,6-trimethyl-3-(pyridin-3-yl)phenyl)borane (3TPYMB); CAS No. 929203-02-1; Chemical Formula C42H42BN3



Tris(2,4,6-trimethyl-3-(pyridin-3-yl)phenyl)borane (known as 3TPYM) is an excellent electron-transport material. With a LUMO energy level of 3.3 eV [1], just lower than most of the work function of cathodes (i.e. CsF/Al), it allows efficient electron injection. This prevents extra electrons from accumulating at the interface.

3TPYMB is also a hole-blocking material with high HOMO of 6.80 eV [1]. This is high enough to block the holes from being recombined with the electrons at the cathode.

3TPYMB has a high triplet-excited energy level (ET = 2.95 eV) [3].


Device structure                                       ITO/PEDOT:PSS/m-MTDATA*(20 nm)/ m-MTDATA:3TPYMB(60 nm)/3TPYMB(10 nm)/LiF(0.8 nm)/ Al(100 nm) [3]
Colour                                  Red red
Max. Luminance 17,100cd/m2
Max. Current Efficiency      36.79 cd/A


Device structure ITO/EHI608/TCTA/TCTA:3TP:Firpic (1:1:0.17)/3TPYMB/Al [6]        
Colour Blue blue
Max Power Efficiency 27.5 lm W-1
Max. Current Efficiency 36.0 cd/A

Device structure ITO/MoO3 (1 nm)/TAPC (40 nm)/mCP (10 nm)/DPEPO doped with 2* (12wt%, 20 nm)/3TPYMB (50 nm)/LiF (1  nm)/Al  (100 nm) [7] 
Colour Blue blue
Max Current Efficiency 33.5 cd/A 
Max EQE 19.7
Max. Power Efficiency 26.3 lm W-1

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

Literature and Reviews

  1. Boosting thin-film perovskite solar cell efficiency through vacuum-deposited sub-nanometer small-molecule electron interfacial layers, W-H. Lee et al., Nano Energy 38, 66–71 (2017); https://doi.org/10.1016/j.nanoen.2017.05.049.
  2. Organic light-emitting diodes employing efficient reverse intersystem crossing for triplet-to-singlet state conversion, K. Goushi et al., Nat. Photonics 6, 253–258 (2012) doi:10.1038/nphoton.2012.31.
  3. Novel Electron-transport Material Containing Boron Atom with a High Triplet Excited Energy Level, D. Tanaka et al., Chem. Lett., 36, 262-263 (2007).
  4. Exciplex emission and decay of co-deposited 4,4′,4″-tris[3-methylphenyl(phenyl)amino]triphenylamine:tris-[3-(3-pyridyl)mesityl]borane organic light-emitting devices with different electron transporting layer thicknesses, Q Huang et al., Appl. Phys. Lett. 104, 161112 (2014); DIO: 10.1063/1.4870492.
  5. Metal-Oxide-Free Methylammonium Lead Iodide Perovskite-Based Solar Cells: the Influence of Organic Charge Transport Layers, O. Malinkiewicz et al., Adv. Energy Mater., 4, 1400345 (2014).
  6. Enhance efficiency of blue and white organic light emitting diodes with mixed host emitting layer using TCTA and 3TPYMB, T-C. Liao et al., Curr. Appl. Phys., 13, S152-S155, (2013).
  7. Bis-Tridentate Ir(III) Metal Phosphors for Efficient Deep-Blue Organic Light- Emitting Diodes, H-H. Kuo et al., Adv.Mater., 29, 1702464 (2017); DOI: 10.1002/adma.201702464.