General Information
CAS number 1152162-74-7
Full name Diphenyl-bis(4-(pyridin-3-yl)phenyl)silane
Chemical formula C34 H 26 N2 Si
Molecular weight 490.67 g/mol
Absorption λmax 251 nm in DCM
Fluorescene λem 366 nm in DCM
HOMO/LUMO HOMO = 6.5 eV, LUMO = 2.5 (ET
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 99.82% (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 of DPPS; CAS No. 1152162-74-7 .
Applications
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 electronic devices.
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
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
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
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
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
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.
Literature and Reviews
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.
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.
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.
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.
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.
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.
