POSTF
POSTF, namely 2'-(Diphenylphosphoryl)-10-phenyl-10H-spiro[acridine-9,9'-fluorene], has an orthogonal molecular structure with an electron donating spiro[acridine-9,9'-fluorene] core and one electron withdrawing diphenylphosphine oxide attachment to the fluorene unit at 2-poistion.
Bipolar POSTF can be used as a single or together with PO-T2T as an exciplex phosphorescent host for highly efficient blue, green and red phosphorescence devices. Using POSTF as the host, large-size white light-emitting panel (15 cm × 15 cm) with max power efficiency of 75.9 lm W-1 can be achieved [1].
General Information
| CAS number | 1647050-25-6 |
| Full name | 2'-(Diphenylphosphoryl)-10-phenyl-10H-spiro[acridine-9,9'-fluorene] |
| Chemical formula | C43H30NOP |
| Molecular weight | 607.68 g/mol |
| Absorption | λmax 280 nm, 325 nm (in DCM) |
| Phosphorescene | λmax 430 nm (in DCM) |
| HOMO/LUMO | HOMO = 5.57 eV, LUMO = 2.12 eV [1] |
| Synonyms | Diphenyl(10-phenyl-10H-spiro[acridine-9,9'-fluoren]-2'-yl)phosphine oxide |
| Classification / Family | Spiro[acridine-9,9'-fluorene] derivatives, Light-emitting diodes, Bipolar host, TADF host materials, Sublimed materials. |
Product Details
| Purity | Sublimed >99.0% (HPLC) |
| Melting point | Tg = 160 ℃, Td (Temperature at 5% weight loss) = 356 ℃. |
| Appearance | 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
Device Structure(s)
| Device structure | ITO/HAT-CN (10 nm)/TAPC (45 nm)/POSTF: FIrpic (15 vol%, 20 nm)/TmPyPB (40 nm)/Liq (2 nm)/Al [1] |
| Colour |
Blue 
|
| Max. Power Efficiency | 50.5 lm W-1 |
| Max. EQE | 26.8% |
| Device structure | ITO/HAT-CN/TAPC/POSTF/POSTF:POT2T:15 mol% FIrpic/POSTF:PO-T2T:Ir(MDQ)2(acac)/PO-T2T/Liq/Al [2] |
| Colour |
White 
|
| Max. Power Efficiency | 60.7 lm W-1 |
| Max. EQE | 24.7% |
| Device structure | ITO/HAT-CN/TAPC/ POSTF/POSTF:PO-T2T: 15% FIrpic (CRS)/PO-T2T/Liq/Al [2] |
| Colour |
Blue
|
| Max. Power Efficiency | 34.7 lm W-1 |
| Max. EQE | 20.1% |
| Device structure | ITO/HAT-CN/TAPC/ POSTF/POSTF:PO-T2T: 15% FIrpic (CRS)/PO-T2T/Liq/Al [2] |
| Colour |
Blue
|
| Max. Power Efficiency | 57.4 lm W-1 |
| Max. EQE | 19.3% |
| Device structure | ITO/HAT-CN/TAPC/ POSTF/POSTF:PO-T2T: 15% Ir(MDQ)2(acac) (CRS)/PO-T2T/Liq/Al [2] |
| Colour |
Red 
|
| Max. Power Efficiency | 46.0 lm W-1 |
| Max. EQE | 27.6% |
*For chemical structure information, please refer to the cited references.
Pricing
| Grade | Order Code | Quantity | Price |
| Sublimed (>99.0% purity) | M2337A1 | 250 mg | £289.00 |
| Sublimed (>99.0% purity) | M2337A1 | 500 mg | £499.00 |
| Sublimed (>99.0% purity) | M2337A1 | 1 g | £879.00 |
MSDS Documentation
POSTF MSDS Sheet
Literature and Reviews
- Orthogonal Molecular Structure for Better Host Material in Blue Phosphorescence and Larger OLED White Lighting, L. Ding et al., Adv. Funct. Mater., 25 (4); 645-650 (2015); DOI: 10.1002/adfm.201403402.
- High-Quality White Organic Light-Emitting Diodes Composed of Binary Emitters with Color Rendering Index Exceeding 80 by Utilizing Color Remedy Strategy, X. Tang et al., Adv. Funct. Mater., 29 (11); 1807541 (2019); DOI: 10.1002/adfm.201807541.
- Theoretical Investigations of the Spiro-Annulated Triphenylamine/ N-Phenylcarbazole-Based Ambipolar Host Materials for OLEDs, D. Zhang, et al., ChemistrySelect, 2 (22), 6604-6611 (2017); DOI: 10.1002/slct.201701424.
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.