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Product Code M2132A1

PPT is an ambipolar phosphorescent host materials 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.

Due to its wide bandgap and high triplet energy level for 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 Yellow 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.

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
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
Power Efficiency @ 1000 cd/m2 24 lm W−1
Current Efficiency @ 1000 cd/m2 42 cd/A
Power Efficiency @ 1000 cd/m2 30 lm/W
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
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 £199.00
Sublimed (>99.0% purity) M2132A1 500 mg £357.00
Sublimed (>99.0% purity) M2132A1 1 g £617.00

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.
  4. An Ambipolar BODIPY Derivative for a White Exciplex OLED and Cholesteric Liquid Crystal Laser toward Multifunctional Devices, M. Chapran et al., ACS Appl. Mater. Interfaces, 9, 4750−4757 (2017); DOI: 10.1021/acsami.6b13689.
  5. Highly Efficient Sky-Blue Fluorescent Organic Light Emitting Diode Based on Mixed Cohost System for Thermally Activated Delayed Fluorescence Emitter (2CzPN), J. Sun et al., ACS Appl. Mater. Interfaces, 8, 9806−9810 (2016); DOI: 10.1021/acsami.6b00286.
  6. Organic long persistent luminescence, R. Kabe et al., Nature 550, 384–387 (2017); doi: 10.1038/nature24010.

To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.