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Product Code M2130A1-250mg
Price £310 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.

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 £310
Sublimed (>99.0% purity) M2130A1 500 mg £500
Sublimed (>99.0% purity) M2130A1 1 g £850

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.
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