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Product Code M2130A1
Price $308.00 ex. VAT

DPPS, ETL and HBL material for photo-electronic devices

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

Diphenyl-bis[4-(pyridin-3-yl)phenyl]silane, DPPS, has two pyridyl groups attached to the tetra-phyenylsilane. Hence, it is electron-deficient.

Almost considered as an insulator, DPPS is a weak electron-transporting material with a wide bandgap Eg = 4.0 eV. Due to its deep HOMO energy level, DPPS is also used as a hole-blocking layer material in photo-electronic devices.

General Information

CAS number 1152162-74-7 
Full name Diphenyl-bis(4-(pyridin-3-yl)phenyl)silane
Chemical formula C34H26N2Si
Molecular weight 490.67 g/mol
Absorption λmax 251 nm in DCM
Fluorescence λem 366 nm in DCM
HOMO/LUMO HOMO = 6.5 eV, LUMO = 2.5 (ET = 2.7 eV)
Synonyms 3,3'-[(Diphenylsilylene)di-4,1-phenylene]bispyridine
Classification / Family Organic electronics, Hole-blocking layer materials (HBL), Electron-transporting layer materials (ETL), TADF-OLEDs, Sublimed materials.

Product Details

Purity Sublimed >99.0% (HPLC)
Melting point TGA: >250 °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.

Chemical Structure

DPPS chemical structure
Chemical structure of DPPS

Device Structure(s)

Device structure ITO/TPDPES:TBPAH (20 nm)/BTPD (20 nm)/BCBP:15%FIrpic (30 nm)/DPPS (30 nm)/LiF (0.5 nm)/Al (100 nm) [1]
Colour Blue blue light emitting device
Max. Luminance 10,578 cd/m2
Max. Current Efficiency 50.5 cd/A 
Max. EQE 22.0%
Max. Power Efficiency 47.0 lm W-1
Device structure ITO/HATCN (10 nm)/NPD (40 nm)/TAPC (10 nm)/4% Pt1O2me2:26mCPy (25 nm)/DPPS (10 nm)/BmPyPB(40 nm)/LiF/Al [2]
Colour White white light emitting device
Max. Current Efficiency 80.3 cd/A 
Max. EQE 26.7%
Max. Power Efficiency 68.3 lm W-1
Device structure ITO/PEDOT:PSS (70 nm)/TAPC (15 nm)/mCP (5 nm)/mCPCN:DMAC-TRZ 8 wt% (20 nm)/DPPS (5 nm)/ 3TPYMB (45 nm)/LiF (0.5 nm)/Al (150 nm) [3]
Colour Green green light emitting device
Max Current Efficiency 71.2 cd/A 
Max EQE 21.8%
Max. Power Efficiency 60.9 lm W-1
Device structure ITO/HATCN (10 nm)/NPD (40 nm)/TAPC (10 nm)/6% PtON1*: 26mCPy (20 nm)/6% PtOO8: 26mCPy (2 nm)/2% PtN3N-ptb:26mCPy (3 nm)/DPPS (10 nm)/BmPyPB (40 nm)/LiF (1 nm)/Al (100 nm) [4]
Colour White white light emitting device
Current Efficiency@100 cd/m2 40 cd/A 
EQE@100 cd/m2 18.4%
Power Efficiency@100 cd/m2 25 lm W-1
Device structure ITO/TAPC (45 nm)/mCP (10 nm)/BImBP*:12% FIrpic (35 nm)/DPPS (55 nm)/LiF (0.9 nm)/Al (120 nm) [5]
Colour Blue blue light emitting device
Max. Luminance 9,513 cd/m2
Max. Current Efficiency 25.7 cd/A 
Max. EQE 22.0%
Max. Power Efficiency 50.4 lm W-1

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


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2130A1 250 mg £280
Sublimed (>99.0% purity) M2130A1 500 mg £460
Sublimed (>99.0% purity) M2130A1 1 g £780

MSDS Documentation


Literature and Reviews

  1. Nearly 100% Internal Quantum Efficiency in an Organic Blue-Light Electrophosphorescent Device Using a Weak Electron Transporting Material with a Wide Energy Gap, L Xiao et al., Adv. Mater., 21, 1271–1274 (2009); DOI: 10.1002/adma.200802034.
  2. Tetradentate Platinum Complexes for Effi cient and Stable Excimer-Based White OLEDs, T. Fleetham et al., Adv. Funct. Mater., 24, 6066–6073 (2014); DOI: 10.1002/adfm.201401244.
  3. A versatile thermally activated delayed fluorescence emitter for both highly efficient doped and non-doped organic light emitting devices, W-L. Tsai et al., Chem. Commun., 51, 13662 (2015); DOI: 10.1039/c5cc05022g.
  4. Efficient white OLEDs employing red, green, and blue tetradentate platinum phosphorescent emitters, G. E. Norby et al., Org. Electron., 37, 163e168 (2016); doi: 10.1016/j.orgel.2016.06.007.
  5. Novel Benzimidazole Derivatives as Electron-Transporting Type Host To Achieve Highly Efficient Sky-Blue Phosphorescent Organic Light-Emitting Diode (PHOLED) Device, J. Huang et al., Org. Lett., 16 (20), 5398–5401 (2014); DOI: 10.1021/ol502602t.
  6. Nitrogen heterocycle-containing materials for highly efficient phosphorescent OLEDs with low operating voltage, D. Chen et al., J. Mater. Chem. C, 2, 9565 (2014); DOI: 10.1039/c4tc01941e.

To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.

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