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Product Code M2088A1-100mg
Price £180 ex. VAT

3TPYMB, an excellent ETL material which allows efficient electron injection

High-purity (>99.0%) and available online for priority dispatch

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].

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

* Measurable with an Optical Spectrometer, see our spectrometer application notes.

Product Details

Purity Sublimed >99.0% (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, see sublimed materials.

Chemical Structure

3TPYMB chemical structure
Chemical Structure of Tris(2,4,6-trimethyl-3-(pyridin-3-yl)phenyl)borane (3TPYMB)

Device Structure(s)

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 light emitting device
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 light emitting device
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 light emitting device
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


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2088A1 100 mg £180
Sublimed (>99.0% purity) M2088A1 250 mg £400
Sublimed (>99.0% purity) M2088A1 500 mg £660

MSDS Documentation


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);
  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).
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