POSTF

CAS Number 1647050-25-6

High Purity Sublimed Materials, Host Materials, Materials, Semiconducting Molecules, TADF Materials

POSTF, high quality and high purity bipolar host material

Phosphorescent host for highly efficient blue, green and red phosphorescence devices

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	λ_max 280 nm, 325 nm (in DCM)
Phosphorescene	λ_max 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	T_g = 160 ℃, T_d (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.

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	£380
Sublimed (>99.0% purity)	M2337A1	500 mg	£660
Sublimed (>99.0% purity)	M2337A1	1 g	£1150

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.