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Product Code M2132A1-250mg
Price £260 ex. VAT

PO15, an ambipolar phosphorescent host material

Used to enhance electroluminescence efficiency

PPT (CAS number 1019842-99-9) is an ambipolar phosphorescent host material with an electron-rich dibenzothiophene core and two electron-deficient diphenyl-phosphoryl side arms.  For this reason, PPT is a good electron-transport material with higher electron mobility rate, offering better electron injection.

Its wide bandgap and high triplet energy level creates highly-efficient TADF-OLED devices, PPT is normally used to host blue light-emitting materials (such as FIrPic). PPT is also used with electron-donating materials to form exciplexes with delayed fluorescence to enhance electroluminescence efficiency.

PPT is one the first reported organic LPL (OLPL) systems of two simple organic molecules that are free from rare elements such as strontium, europium and dysprosium. With a simple structure that is easy to fabricate, the device of OLPL system can generate emission lasting for more than an hour at ambient temperatures.

General Information

CAS number 1019842-99-9
Full name 2,8-Bis(diphenyl-phosphoryl)-dibenzo[b,d]thiophene
Chemical formula C36H26O2P2S
Molecular weight 584.60 g/mol
Absorption λmax 312, 328 nm in DCM
Fluorescence λem 350 nm in DCM
HOMO/LUMO HOMO = 6.7 eV, LUMO = 3.0 eV (ET = 3.1 eV) [1]
Synonyms DPDT, PO15
Classification / Family Dibenzothiophene derivatives, Organic electronics, Electron-transport layer materials (ETL), Phosphorescent host materials, TADF-OLEDs, Organic long persistent luminescenceSublimed materials.

Product Details

Purity Sublimed: >99.0% (HPLC)
Melting point TGA: >320 °C (0.5% weight loss)
Appearance Off-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

PPT chemical structure
Chemical structure of PPT

Device Structure(s)

Device structure ITO/m-MTDATA (35 nm)/50 mol.% m-MTDATA:PPT (30 nm)/PPT (35 nm)/LiF (0.8 nm)/Al [1]
Colour Orange orange light emitting device
Max. EQE 10%
Max. Power Efficiency 47.0 lm W-1
Device structure  ITO/TAPC (40 nm)/TCTA (2 nm)/26DCzPPy:TCTA:FIrpic (0.4:0.4:0.2) (5 nm)/26DCzPPy:PPT:FIrpic (0.4:0.4:0.2) (5 nm)/3TPYMB (55 nm)/CsF (2 nm)/Al (180 nm) [2]
Colour Blue blue light emitting device
Power Efficiency @ 1000 cd/m2 30 lm W−1
Current Efficiency @ 1000 cd/m2 42 cd/A
Device structure ITO/HATCN (10 nm)/Tris-PCz (35 nm)/10 wt. % 4CzPN:mCBP (G-EML) (5 nm)/6 wt. % 4CzPN:2 wt. % 4CzTPN-Ph:mCBP (R-EML) (4 nm)/10 wt. % 3CzTRZ:PPT (B-EML) (6 nm)/PPT (50 nm)/LiF (0.8 nm)/Al (100 nm) [3]
Colour White white light emitting device
Max. Current Efficiency 13.13 cd/A 
Max. EQE 6.8%
Max. Power Efficiency 4.75 lm W-1

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


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2132A1 250 mg £260
Sublimed (>99.0% purity) M2132A1 500 mg £460
Sublimed (>99.0% purity) M2132A1 1 g £800

MSDS Documentation


Literature and Reviews

  1. Efficient organic light-emitting diodes through up-conversion from triplet to singlet excited states of exciplexes, K. Goushi et al., Appl. Phys. Lett. 101, 023306 (2012); doi: 10.1063/1.4737006.
  2. Blue and white phosphorescent organic light emitting diode performance improvementbyconfining electrons and holes inside double emitting layers, Y-S.Tsai et al., J. Luminescence 153, 312–316 (2014); doi: 10.1016/j.jlumin.2014.03.040.
  3. High-efficiency white organic light-emitting diodes using thermally activated delayed fluorescence, J. Nishide et al., Appl. Phys. Lett. 104, 233304 (2014); doi: 10.1063/1.4882456.
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