DPEPO
DPEPO, one of the most popular materials used to host blue TADF-based OLEDs
High-purity (>99.0%) and available online for priority dispatch
DPEPO, with steric ortho-substituted diphenylphosphine oxide (DPPO) groups, is one of the most popular large band-gap materials used to host blue TADF-based OLEDs.
This substitution with electron-withdrawing DPPO moieties not only improves its thermal and morphological stability, but also makes DPEPO an electron-transport layer material. Because of its deep HOMO energy level, DPEPO also acts as a hole-blocking layer material in TADF-OLED devices.
General Information
| CAS number | 808142-23-6 |
|---|---|
| Full name | Bis[2-(diphenylphosphino)phenyl]ether oxide |
| Synonyms | DPEPO |
| Chemical formula | C36H28O3P2 |
| Molecular weight | 570.55 g/mol |
| Absorption* | λmax 388 nm in CH2Cl2 |
| Fluorescence | λem 311 nm in CH2Cl2 |
| HOMO/LUMO | HOMO = 6.1 eV, LUMO = 2.0 eV; T1 = 3.0 eV [1] |
| Classification / Family | Diphenyl ether (DPE), TADF blue emitter host materials, Electron-transport layer materials (ETL), Hole-blocking layer materials (HBL), Phosphorescent organic light-emitting devices (PHOLEDs), Sublimed materials |
* Measurable with an Optical Spectrometer, see our spectrometer application notes.
Product Details
| Purity | Sublimed* >99.0% (HPLC) |
|---|---|
| Melting point | TGA: >320 °C (0.5% weight loss) |
| Appearance | White powder/crystals |
* Sublimation is a technique used to obtain ultra pure-grade chemicals, please refer to sublimed materials for OLED devices for more information.
Chemical Structure
Device Structure(s)
| Device structure | ITO/HATCN (5 nm)/NPB (30 nm)/TCTA (10 nm)/mCP (10 nm)/DMAC-DPS:PO-01* (0.8 wt% 30 nm)/DPEPO (10 nm)/Bphen (30 nm)/LiF (0.5 nm)/Al(150 nm) [2] |
|---|---|
| Colour | White 
|
| Max. EQE | 20.8% |
| Max. Power Efficiency | 51.2 lm/W |
| Device structure | ITO (110 nm)/TAPC (35 nm)/mCBP (5 nm)/6 wt%-Ac-OSO:DPEPO (20 nm)/DPEPO (10 nm)/B3PyPB (40 nm)/LiF (0.8 nm)/Al (80 nm) [3] |
|---|---|
| Colour | Blue 
|
| Max. Current Efficiency | 37.9 cd/A |
| Max. EQE | 20.5% |
| Max. Power Efficiency | 20.1 Im/W |
| Device structure | ITO/a-NPD (30 nm)/TCTA (20 nm)/CzSi (10 nm)/EML (20 nm)/ DPEPO (10 nm)/TPBI (30 nm)/LiF (0.5 nm)/Al [4] |
|---|---|
| Colour | Blue
|
| Max. EQE | 14.5% |
| Max. Luminesence | 2544 cd/m2 |
| Device structure | PEDOT:PSS (60 nm)/TAPC (20 nm)/mCP (10 nm)/DPEPO: TmCzTrz (25 nm)/TSPO1 (5 nm)/TPBI (20 nm)/LiF (1 nm)/Al (200 nm) [5] |
|---|---|
| Colour | Blue
|
| Max. EQE | 25.5% |
| Max. Power Efficiency | 52.1 Im/W |
*For chemical structure information, please refer to the cited references.
Pricing
| Grade | Order Code | Quantity | Price |
|---|---|---|---|
| Sublimed (>99.0% purity) | M2105A1 | 250 mg | £260 |
| Sublimed (>99.0% purity) | M2105A1 | 500 mg | £420 |
| Sublimed (>99.0% purity) | M2105A1 | 1 g | £680 |
MSDS Documentation
DPEPO MSDS sheetLiterature and Reviews
- Triplet exciton confinement in green organic light-emitting diodes containing luminescent charge-transfer Cu(I) complexes, Q. Zhang, et al., Adv. Funct. Mater.22, 2327–2336 (2012); DOI: 10.1002/adfm.201101907.
- Highly Efficient Simplified Single-Emitting-Layer Hybrid WOLEDs with Low Roll-off and Good Color Stability through Enhanced Förster Energy Transfer, D. Zhang et al., ACS Appl. Mater. Interfaces, 7 (51), 28693–28700 (2015); DOI: 10.1021/acsami.5b10783.
- High-Efficiency Blue Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence from Phenoxaphosphine and Phenoxathiin Derivatives, S. Lee et al., Adv. Mater., 28, 4626–4631 (2016); DOI: 10.1002/adma.201506391.
- High-efficiency deep-blue organic light-emitting diodes based on a thermally activated delayed fluorescence emitter, S. Wu et al., J. Mater. Chem. C, 2,421 (2014); DOI: 10.1039/c3tc31936a.
- Design Strategy for 25% External Quantum Effi ciency in Green and Blue Thermally Activated Delayed Fluorescent Devices, D. Lee et al., Adv. Mater. 2015, 27, 5861–5867 (2015); DOI: 10.1002/adma.201502053.
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.