Name: POSTF
SKU: 38356

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 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 .

Chemical Structure

Chemical structure of 2'-(Diphenylphosphoryl)-10-phenyl-10H-spiro[acridine-9,9'-fluorene] (POSTF), CAS# 1647050-25-6.

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	[[price gbp="380"]]
Sublimed (>99.0% purity)	M2337A1	500 mg	[[price gbp="660"]]
Sublimed (>99.0% purity)	M2337A1	1 g	[[price gbp="1150"]]

MSDS Documentation

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.